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Sample records for single turn unshielded

  1. Single-layer 2nd-order high-T{sub c} SQUID gradiometer for use in unshielded environments

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Soon-Gul; Park, Seung Moon; Kang, Chan Seok [Korea University, Chungnam (Korea, Republic of); Kim, In-Seon [Korea Research Institute of Standards and Science, Daejon (Korea, Republic of); Kim, Sang-Jae [Cheju National University, Cheju (Korea, Republic of)

    2006-05-15

    We have studied the fabrication of second-order SQUID gradiometers from single-layer high-T{sub c} film and the feasibility of using those gradiometers in magnetocardiography. The gradiometer contains three parallel-connected pickup loops that are directly coupled to a step-edge junction SQUID with the coupling polarity of the center loop opposite to those of the two side loops. For a well-balanced gradiometer with a balancing factor of 10{sup 3}, we achieved an unshielded gradient noise of 0.84 pT/cm{sup 2}/Hz{sup 1/2} at 1 Hz, which corresponds to an equivalent field noise of 280 fT/Hz{sup 1/2}. A gradiometer with a 5.8-mm baseline successfully recorded the magnetocardic signals of a human subject, demonstrating the feasibility of using the device in biomagnetism. We have also studied the use of submicron YBCO bridges as Josephson elements of long-baseline gradiometers. The bridges were fabricated from 3-{mu}m-wide, 300-nm-thick YBCO lines with a thin layer of Au on top by using a focused-ion-beam (FIB) patterning method. The temperature-dependent critical currents, I{sub c}(T), and the normal state resistances, R{sub N}(T), showed SIS-type behaviors, which are believed to be due to naturally formed grain boundaries.

  2. Single-layer 2nd-order high-Tc SQUID gradiometer for use in unshielded environments

    International Nuclear Information System (INIS)

    Lee, Soon-Gul; Park, Seung Moon; Kang, Chan Seok; Kim, In-Seon; Kim, Sang-Jae

    2006-01-01

    We have studied the fabrication of second-order SQUID gradiometers from single-layer high-T c film and the feasibility of using those gradiometers in magnetocardiography. The gradiometer contains three parallel-connected pickup loops that are directly coupled to a step-edge junction SQUID with the coupling polarity of the center loop opposite to those of the two side loops. For a well-balanced gradiometer with a balancing factor of 10 3 , we achieved an unshielded gradient noise of 0.84 pT/cm 2 /Hz 1/2 at 1 Hz, which corresponds to an equivalent field noise of 280 fT/Hz 1/2 . A gradiometer with a 5.8-mm baseline successfully recorded the magnetocardic signals of a human subject, demonstrating the feasibility of using the device in biomagnetism. We have also studied the use of submicron YBCO bridges as Josephson elements of long-baseline gradiometers. The bridges were fabricated from 3-μm-wide, 300-nm-thick YBCO lines with a thin layer of Au on top by using a focused-ion-beam (FIB) patterning method. The temperature-dependent critical currents, I c (T), and the normal state resistances, R N (T), showed SIS-type behaviors, which are believed to be due to naturally formed grain boundaries.

  3. Electrical requirements for unshielded glove boxes

    International Nuclear Information System (INIS)

    1978-02-01

    The specification relates to the general design and installation of electrical services required in unshielded glove boxes in which atmospheres of air, argon or nitrogen etc. may exist either temporarily or permanently. The specification does not apply to electrical services for glove boxes with flammable explosive atmospheres. (author)

  4. Diamond turning of Si and Ge single crystals

    Energy Technology Data Exchange (ETDEWEB)

    Blake, P.; Scattergood, R.O.

    1988-12-01

    Single-point diamond turning studies have been completed on Si and Ge crystals. A new process model was developed for diamond turning which is based on a critical depth of cut for plastic flow-to-brittle fracture transitions. This concept, when combined with the actual machining geometry for single-point turning, predicts that {open_quotes}ductile{close_quotes} machining is a combined action of plasticity and fracture. Interrupted cutting experiments also provide a meant to directly measure the critical depth parameter for given machining conditions.

  5. Geometry of single-point turning tools and drills

    CERN Document Server

    Astakhov, Viktor P

    2010-01-01

    Tools for metal cutting have many shapes and features, each of which is described by its angles or geometries. The selection of the right cutting tool geometry is critical because it directly affects the integrity of the machined surface, tool life, power needed for machining, and thus the overall machining efficiency. ""Geometry of Single-Point Turning Tools and Drills"" outlines clear objectives of cutting tool geometry selection and optimization, using multiple examples to provide a thorough explanation. The establishment of clear bridges between cutting theory, tool geometry, and shop prac

  6. Single-Mode WGM Resonators Fabricated by Diamond Turning

    Science.gov (United States)

    Grudinin, Ivan; Maleki, Lute; Savchenkov, Anatoliy; Matsko, Andrewy; Strekalov, Dmitry; Iltchenko, Vladimir

    2008-01-01

    A diamond turning process has made possible a significant advance in the art of whispering-gallery-mode (WGM) optical resonators. By use of this process, it is possible to fashion crystalline materials into WGM resonators that have ultrahigh resonance quality factors (high Q values), are compact (ranging in size from millimeters down to tens of microns), and support single electromagnetic modes. This development combines and extends the developments reported in "Few- Mode Whispering-Gallery-Mode Resonators" (NPO-41256), NASA Tech Briefs, Vol. 30, No. 1 (January 2006), page 16a and "Fabrication of Submillimeter Axisymmetric Optical Components" (NPO-42056), NASA Tech Briefs, Vol. 31, No. 5 (May 2007), page 10a. To recapitulate from the first cited prior article: A WGM resonator of this special type consists of a rod, made of a suitable transparent material, from which protrudes a thin circumferential belt of the same material. The belt is integral with the rest of the rod and acts as a circumferential waveguide. If the depth and width of the belt are made appropriately small, then the belt acts as though it were the core of a single-mode optical fiber: the belt and the rod material adjacent to it support a single, circumferentially propagating mode or family of modes. To recapitulate from the second cited prior article: A major step in the fabrication of a WGM resonator of this special type is diamond turning or computer numerically controlled machining of a rod of a suitable transparent crystalline material on an ultrahigh-precision lathe. During the rotation of a spindle in which the rod is mounted, a diamond tool is used to cut the rod. A computer program is used to control stepping motors that move the diamond tool, thereby controlling the shape cut by the tool. Because the shape can be controlled via software, it is possible to choose a shape designed to optimize a resonator spectrum, including, if desired, to limit the resonator to supporting a single mode

  7. Conversion Factors for Predicting Unshielded Dose Rates in Shielded Waste

    International Nuclear Information System (INIS)

    Clapham, M.; Seamans Jr, J.V.; Arbon, R.E.

    2009-01-01

    This document describes the methodology developed and used by the Advanced Mixed Waste Treatment Project for determining the activity content and the unshielded surface dose rate for lead lined containers contaminated with transuranic waste. Several methods were investigated: - Direct measurement of the dose rate after removing the shielding. - Use of a MicroShield R derived dose conversion factor, (mRem/hr unshielded )/(mRem/hr shielded ), applied to the measured surface dose rate to estimate the unshielded surface dose rate. - Use of a MicroShield R derived activity conversion factor, mRem/hr unshielded /Ci, applied to the measured activity to estimate the unshielded dose rate. - Use of an empirically derived activity conversion factor, mRem/hr unshielded /Ci, applied to the measured activity to estimate the unshielded dose rate. The last approach proved to be the most efficacious by using a combination of nondestructive assay and empirically defined dose rate conversion factors. Empirically derived conversion factors were found to be highly dependent upon the matrix of the waste. Use of conversion factors relied on activity values corrected to address the presence of a lead liner. (authors)

  8. Assessment of single-turn extraction for a superconducting separated-sector cyclotron

    Directory of Open Access Journals (Sweden)

    J.-W. Kim

    1999-04-01

    Full Text Available We have studied the beam dynamics in a high field separated-sector cyclotron to establish conditions required to achieve single-turn extraction. Extraction efficiency above 99% is aimed to avoid beam-induced damages. A sufficient last-turn separation and a preservation of beam quality throughout the acceleration are the prerequisites. The last-turn separation can be enhanced with the orbital precession induced by an off-centering injection as in existent lower field separated-sector cyclotrons. The beam qualities, on the other hand, are affected by the resonances traversed or approached during the acceleration. Acceleration of light nuclei to the energies of 300–400 MeV/u was especially disturbing because of the broadening of radial beamwidth upon crossing the ν_{r}=3/2 resonance. Tolerance to the third harmonic gradient field, which causes the resonance in lowest order, is set to be 0.1 G/cm. The integer resonance ν_{z}=1 can be avoided with a proper design of the yoke. The longitudinal space charge forces were also investigated to estimate the intensity limits determined by the energy spreads of beam assuming simplified charge distributions. Moreover, beam preparations for injection matching are described in view of reducing the beam losses into the extraction elements.

  9. An application of eddy current damping effect on single point diamond turning of titanium alloys

    Science.gov (United States)

    Yip, W. S.; To, S.

    2017-11-01

    Titanium alloys Ti6Al4V (TC4) have been popularly applied in many industries. They have superior material properties including an excellent strength-to-weight ratio and corrosion resistance. However, they are regarded as difficult to cut materials; serious tool wear, a high level of cutting vibration and low surface integrity are always involved in machining processes especially in ultra-precision machining (UPM). In this paper, a novel hybrid machining technology using an eddy current damping effect is firstly introduced in UPM to suppress machining vibration and improve the machining performance of titanium alloys. A magnetic field was superimposed on samples during single point diamond turning (SPDT) by exposing the samples in between two permanent magnets. When the titanium alloys were rotated within a magnetic field in the SPDT, an eddy current was generated through a stationary magnetic field inside the titanium alloys. An eddy current generated its own magnetic field with the opposite direction of the external magnetic field leading a repulsive force, compensating for the machining vibration induced by the turning process. The experimental results showed a remarkable improvement in cutting force variation, a significant reduction in adhesive tool wear and an extreme long chip formation in comparison to normal SPDT of titanium alloys, suggesting the enhancement of the machinability of titanium alloys using an eddy current damping effect. An eddy current damping effect was firstly introduced in the area of UPM to deliver the results of outstanding machining performance.

  10. An application of eddy current damping effect on single point diamond turning of titanium alloys

    International Nuclear Information System (INIS)

    Yip, W S; To, S

    2017-01-01

    Titanium alloys Ti6Al4V (TC4) have been popularly applied in many industries. They have superior material properties including an excellent strength-to-weight ratio and corrosion resistance. However, they are regarded as difficult to cut materials; serious tool wear, a high level of cutting vibration and low surface integrity are always involved in machining processes especially in ultra-precision machining (UPM). In this paper, a novel hybrid machining technology using an eddy current damping effect is firstly introduced in UPM to suppress machining vibration and improve the machining performance of titanium alloys. A magnetic field was superimposed on samples during single point diamond turning (SPDT) by exposing the samples in between two permanent magnets. When the titanium alloys were rotated within a magnetic field in the SPDT, an eddy current was generated through a stationary magnetic field inside the titanium alloys. An eddy current generated its own magnetic field with the opposite direction of the external magnetic field leading a repulsive force, compensating for the machining vibration induced by the turning process. The experimental results showed a remarkable improvement in cutting force variation, a significant reduction in adhesive tool wear and an extreme long chip formation in comparison to normal SPDT of titanium alloys, suggesting the enhancement of the machinability of titanium alloys using an eddy current damping effect. An eddy current damping effect was firstly introduced in the area of UPM to deliver the results of outstanding machining performance. (paper)

  11. Surface finish in ultra-precision diamond turning of single-crystal silicon

    Science.gov (United States)

    Ayomoh, M.; Abou-El-Hossein, K.

    2015-10-01

    Silicon is an optical material widely used in the production of infrared optics. However, silicon as a brittle material exhibits some difficulties when ultra-precision machined by mono-crystalline single point diamond. Finish turning of silicon with mono- crystalline diamond inserts results in accelerated tool wear rates if the right combination of the machining parameters is not properly selected. In this study, we conducted a series of machining tests on an ultra-high precision machine tool using finish turning conditions when using mono-crystalline diamond inserts with negative rake angle and relatively big nose radius. The study yields some recommendations on the best combination of machining parameters that will result in maximum material removal rates with smallest possible surface finish. In this work, standard non-controlled waviness diamond inserts having nose radius of about 1.5 mm, rake angle of negative 25°, and clearance angle of 5° were used to produce flat surfaces on silicon disk. From the results, it has been established that feed rate has the most influential effect followed by the depth of cut and cutting speed.

  12. Standard testing procedures for optical fiber and unshielded twisted pair at Sandia National Laboratories

    Energy Technology Data Exchange (ETDEWEB)

    Adams, R.L.

    1993-11-01

    This document will establish a working standard for testing optical fiber and unshielded twisted pair cables included in the Lab-wide telecommunications cabling system. The purpose of these standard testing procedures is to deliver to all Sandians a reliable, low-maintenance, state-of-the-art, ubiquitous telecommunications cabling infrastructure capable of satisfying all current and future telecommunication needs.

  13. Optimal filter design for shielded and unshielded ambient noise reduction in fetal magnetocardiography

    Science.gov (United States)

    Comani, S.; Mantini, D.; Alleva, G.; Di Luzio, S.; Romani, G. L.

    2005-12-01

    The greatest impediment to extracting high-quality fetal signals from fetal magnetocardiography (fMCG) is environmental magnetic noise, which may have peak-to-peak intensity comparable to fetal QRS amplitude. Being an unstructured Gaussian signal with large disturbances at specific frequencies, ambient field noise can be reduced with hardware-based approaches and/or with software algorithms that digitally filter magnetocardiographic recordings. At present, no systematic evaluation of filters' performances on shielded and unshielded fMCG is available. We designed high-pass and low-pass Chebychev II-type filters with zero-phase and stable impulse response; the most commonly used band-pass filters were implemented combining high-pass and low-pass filters. The achieved ambient noise reduction in shielded and unshielded recordings was quantified, and the corresponding signal-to-noise ratio (SNR) and signal-to-distortion ratio (SDR) of the retrieved fetal signals was evaluated. The study regarded 66 fMCG datasets at different gestational ages (22-37 weeks). Since the spectral structures of shielded and unshielded magnetic noise were very similar, we concluded that the same filter setting might be applied to both conditions. Band-pass filters (1.0-100 Hz) and (2.0-100 Hz) provided the best combinations of fetal signal detection rates, SNR and SDR; however, the former should be preferred in the case of arrhythmic fetuses, which might present spectral components below 2 Hz.

  14. Optimal filter design for shielded and unshielded ambient noise reduction in fetal magnetocardiography

    International Nuclear Information System (INIS)

    Comani, S; Mantini, D; Alleva, G; Luzio, S Di; Romani, G L

    2005-01-01

    The greatest impediment to extracting high-quality fetal signals from fetal magnetocardiography (fMCG) is environmental magnetic noise, which may have peak-to-peak intensity comparable to fetal QRS amplitude. Being an unstructured Gaussian signal with large disturbances at specific frequencies, ambient field noise can be reduced with hardware-based approaches and/or with software algorithms that digitally filter magnetocardiographic recordings. At present, no systematic evaluation of filters' performances on shielded and unshielded fMCG is available. We designed high-pass and low-pass Chebychev II-type filters with zero-phase and stable impulse response; the most commonly used band-pass filters were implemented combining high-pass and low-pass filters. The achieved ambient noise reduction in shielded and unshielded recordings was quantified, and the corresponding signal-to-noise ratio (SNR) and signal-to-distortion ratio (SDR) of the retrieved fetal signals was evaluated. The study regarded 66 fMCG datasets at different gestational ages (22-37 weeks). Since the spectral structures of shielded and unshielded magnetic noise were very similar, we concluded that the same filter setting might be applied to both conditions. Band-pass filters (1.0-100 Hz) and (2.0-100 Hz) provided the best combinations of fetal signal detection rates, SNR and SDR; however, the former should be preferred in the case of arrhythmic fetuses, which might present spectral components below 2 Hz

  15. Turn-off failure in multi-finger SOI-LIGBT used for single chip inverter ICs

    Science.gov (United States)

    Zhang, Long; Zhu, Jing; Zhao, Minna; Huang, Xuequan; Chen, Jiajun; Sun, Weifeng; Ding, Desheng

    2017-11-01

    In this paper, the clamped inductive turn-off failure of the Silicon-on-Insulator Lateral Insulated Gate Bipolar Transistor (SOI-LIGBT) with multiple fingers under high-voltage and high-current conditions is investigated. First, the measured turn-off waveforms combining with the on-state I-V characteristics of the failed device are discussed to distinguish the probable cause of the failure. Then, two-dimensional (2-D) electrothermal simulations are performed to reproduce the failure by using Sentaurus TCAD. The failure is originated from an inhomogeneous depletion behavior among the paralleled fingers during the turn-off, which gives rise to the non-uniform current-sharing and the subsequent current crowding in single finger. As a result, the latch-up of the device takes place. The simulation indicates that the current crowding is formed mainly through an internal path in the silicon. In order to verify the failure mechanism, an improved device with deep-oxide trenches arranged between the adjacent fingers is fabricated. The measured results demonstrate that no failure occurs when the improved device turns off under high-voltage and high-current conditions.

  16. Ultrasonically Assisted Single Point Diamond Turning of Optical Mold of Tungsten Carbide

    Directory of Open Access Journals (Sweden)

    Zhanjie Li

    2018-02-01

    Full Text Available To realize high efficiency, low/no damage and high precision machining of tungsten carbide used for lens mold, a high frequency ultrasonic vibration cutting system was developed at first. Then, tungsten carbide was precisely machined with a polycrystalline diamond (PCD tool assisted by the self-developed high frequency ultrasonic vibration cutting system. Tool wear mechanism was investigated in ductile regime machining of tungsten carbide. The cutter back-off phenomenon in the process was analyzed. The subsequent experimental results of ultra-precision machining with a single crystal diamond tool showed that: under the condition of high frequency ultrasonic vibration cutting, nano-scale surface roughness can be obtained by the diamond tool with smaller tip radius and no defects like those of ground surface were found on the machined surface. Tool wear mechanisms of the single crystal diamond tool are mainly abrasive wear and micro-chipping. To solve the problem, a method of inclined ultrasonic vibration cutting with negative rake angle was put forward according to force analysis, which can further reduce tool wear and roughness of the machined surface. The investigation was important to high efficiency and quality ultra-precision machining of tungsten carbide.

  17. Engineering design and integration of in-vessel single turn segmental coil in vacuum vessel of SST-1

    Science.gov (United States)

    Jayswal, Snehal; Chauhan, P.; Santra, P.; Vasava, K.; Perekh, T.; Patel, H.; Biswas, P.; Pradhan, S.

    2017-04-01

    SST-1 tokamak is having the error field due to unsymmetrical positioning of Toroidal field coils which push the plasma to inner side from its major radius of 1100 mm. hence it is required to install the In-vessel Coil (PF6) at a location of 1350 mm radius and elevation of 350 mm above and below the mid plane of the toroidal field coils. The In-Vessel coil was decided to make in eight segments for futuristic use, to control the individual localized error field correction by supplying the different current. A single turn, eight segments, copper conductor with 18 mm diameter with GFRP insulation and in housed in SS304 L casing to carry 8000 A current for 10 s was designed and installed in vacuum vessel of SST-1. This paper will present the design drivers, material selection, advantages and constraints of the in-vessel coils, its conceptual and engineering design, CAD models, finite element analysis using ANSYS, its fabrication, quality assurance/control and assembly/integration aspects inside vacuum vessel of SST-1.

  18. An EMC Evaluation of the Use of Unshielded Motor Cables in AC Adjustable Speed Drive Applications

    DEFF Research Database (Denmark)

    Hanigovszki, Norbert; Poulsen, J.; Spiazzi, G.

    2004-01-01

    The most common solution for modern adjustable speed drives (ASD) is the use of induction motors (IM) fed by voltage-source inverters (VSI). The inverter generates a pulsewidth modulated (PWM) voltage, with values of about 6 kV/ dv/dt m s or even more. In three-leg inverters for three-phase appli......The most common solution for modern adjustable speed drives (ASD) is the use of induction motors (IM) fed by voltage-source inverters (VSI). The inverter generates a pulsewidth modulated (PWM) voltage, with values of about 6 kV/ dv/dt m s or even more. In three-leg inverters for three......-phase applications the occurrence of common-mode voltage is inherent due to asymmetrical output pulses. As a result, for electromagnetic compatibility (EMC) reasons, in most applications shielded cables are used between the inverter and the motor, implying high installation costs. The present paper discusses the use...... filter with DC link connection. It is concluded that, from an EMC point of view, unshielded cables can give very good performance provided that a common-mode (CM) output filter is used....

  19. An unshielded whole body radioactivity counter for monitoring persons after a radiation accident

    International Nuclear Information System (INIS)

    Katoch, D.S.; Somasundaram, S.

    1979-01-01

    An unshielded chair in which the subject sits, holding a 7.6 cm x 7.6 cm NaI (Tl) detector in his lap, was evaluated for monitoring of persons suspected of internal radioactive contamination following a radiation accident. The reduction in different energy bands of the background gamma-ray spectrum due to self-shielding of the subject was studied for two postures, designated ''upright'' and ''folding'' and the data were analysed in a CDC 3600 computer to obtain the best-fit regression equation relating the reduction factor with body weight and height. The response of the counter was evaluated using an in vitro method and the ranges of under/over-estimation of body burden resulting from assumption of partial/uniform distribution of activity were determined. Counting sensitivities were derived for 13 radioisotopes having gamma-ray energies in the range 145 keV-1.46 MeV. The results are presented and discussed. The study shows that this simple system may be used not only in radiation emergencies but also for operational monitoring of radiation workers for a number of radioisotopes of low and medium radiotoxicity. (auth.)

  20. Echo-Planar Imaging for a 9.4 Tesla Vertical-Bore Superconducting Magnet Using an Unshielded Gradient Coil

    Science.gov (United States)

    KODAMA, Nao; KOSE, Katsumi

    2016-01-01

    Echo-planar imaging (EPI) sequences were developed for a 9.4 Tesla vertical standard bore (∼54 mm) superconducting magnet using an unshielded gradient coil optimized for live mice imaging and a data correction technique with reference scans. Because EPI requires fast switching of intense magnetic field gradients, eddy currents were induced in the surrounding metallic materials, e.g., the room temperature bore, and this produced serious artifacts on the EPI images. We solved the problem using an unshielded gradient coil set of proper size (outer diameter = 39 mm, inner diameter = 32 mm) with time control of the current rise and reference scans. The obtained EPI images of a phantom and a plant sample were almost artifact-free and demonstrated the promise of our approach. PMID:27001398

  1. Lasing thresholds of helical photonic structures with different positions of a single light-amplifying helix turn

    Energy Technology Data Exchange (ETDEWEB)

    Blinov, L M; Palto, S P [A.V. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow, Russian Federaion (Russian Federation)

    2013-09-30

    Numerical simulation is used to assess the lasing threshold of helical structures of cholesteric liquid crystals (CLCs) in which only one turn amplifies light. This turn is located either in the centre of symmetric structures of various sizes or in an arbitrary place in asymmetric structures of preset size. In all cases, we find singularities in light amplification by a one-dimensional CLC structure for the most important band-edge modes (m1, m2 and m3) and plot the threshold gain coefficient k{sub th} against the position of the amplifying turn. For the symmetric structures, the lasing threshold of the m1 mode is shown to vary linearly with the inverse of the square of the cavity length. Moreover, modes with a lower density of photonic states (DOS) in the cavity may have a lower lasing threshold. This can be accounted for by the dependence of the density of photonic states on the position of the amplifying turn and, accordingly, by the nonuniform electromagnetic field intensity distribution along the cavity for different modes. In the asymmetric structures, the same field energy distribution is responsible for a correlation between k{sub th} and DOS curves. (lasers)

  2. Limited effect of dopaminergic medication on straight walking and turning in early to moderate Parkinson’s disease during single and dual tasking

    Directory of Open Access Journals (Sweden)

    Morad eElshehabi

    2016-01-01

    Full Text Available Background: In Parkinson’s disease (PD, the effects of dopaminergic medication on straight walking and turning were mainly investigated under single tasking (ST conditions. However, multitasking situations are considered more daily relevant.Methods: Thirty-nine early to moderate PD patients performed the following standarized ST and dual tasks (DT as fast as possible for one minute during On- and Off-medication while wearing inertial sensors: straight walking and turning, checking boxes, and subtracting serial 7s. Quantitative gait parameters, as well as velocity of the secondary tasks were analyzed.Results: The following parameters improved significantly in On-medication during ST: gait velocity during straight walking (p=0.03; step duration (p=0.048 and peak velocity (p=0.04 during turning; velocity of checking boxes during ST (p=0.04 and DT (p=0.04. Velocity of checking boxes was the only parameter that also improved during DT.Conclusion: These results suggest that dopaminergic medication does not relevantly influence straight walking and turning in early to moderate PD during DT.

  3. Adaptive suppression of power line interference in ultra-low field magnetic resonance imaging in an unshielded environment

    Science.gov (United States)

    Huang, Xiaolei; Dong, Hui; Qiu, Yang; Li, Bo; Tao, Quan; Zhang, Yi; Krause, Hans-Joachim; Offenhäusser, Andreas; Xie, Xiaoming

    2018-01-01

    Power-line harmonic interference and fixed-frequency noise peaks may cause stripe-artifacts in ultra-low field (ULF) magnetic resonance imaging (MRI) in an unshielded environment and in a conductively shielded room. In this paper we describe an adaptive suppression method to eliminate these artifacts in MRI images. This technique utilizes spatial correlation of the interference from different positions, and is realized by subtracting the outputs of the reference channel(s) from those of the signal channel(s) using wavelet analysis and the least squares method. The adaptive suppression method is first implemented to remove the image artifacts in simulation. We then experimentally demonstrate the feasibility of this technique by adding three orthogonal superconducting quantum interference device (SQUID) magnetometers as reference channels to compensate the output of one 2nd-order gradiometer. The experimental results show great improvement in the imaging quality in both 1D and 2D MRI images at two common imaging frequencies, 1.3 kHz and 4.8 kHz. At both frequencies, the effective compensation bandwidth is as high as 2 kHz. Furthermore, we examine the longitudinal relaxation times of the same sample before and after compensation, and show that the MRI properties of the sample did not change after applying adaptive suppression. This technique can effectively increase the imaging bandwidth and be applied to ULF MRI detected by either SQUIDs or Faraday coil in both an unshielded environment and a conductively shielded room.

  4. Turned on/turned off

    DEFF Research Database (Denmark)

    Petersen, Eva Bendix

    2016-01-01

    position, it attempts to sense into the lived experience of being subject to, and of, turns in social theory. As a whole the paper seeks to work with and allow for multiplicity in tone, focus, researcher positioning, reader positioning, and more, to see what knowledge that does not seek confident closure...

  5. Tight Turns

    Directory of Open Access Journals (Sweden)

    Jenifer Sutherland

    2013-01-01

    Full Text Available The plain text was task-oriented in a roundabout way, providing detailed instructions for how NOT to build an elaborate sequence of bridges, each one bound to produce, according to chapters one through twenty-three, disastrous results. Graphic novels disguised as illuminated letters twisted the tent-dwelling decipherer into painful self-recognition. The flashlight followed the phases of the moon. Meanwhile one strand of marginalia, written in anxious back-slant, pleaded for some kind of adjustable form for managing the confluence, especially during flood season. I like what we came up with. 'We' is a little big word. In fact the tent turns out to be one of those Borgesian core-tech structures allowing for astonishing internal expansion. There's not much we didn't get in there and not much in there that didn't get us. So I suppose that's it. This tent. This confluence. These children who found me here, turned text into life and made life home.

  6. Coumarins as turn on/off fluorescent probes for detection of residual acetone in cosmetics following headspace single-drop microextraction.

    Science.gov (United States)

    Cabaleiro, N; de la Calle, I; Bendicho, C; Lavilla, I

    2014-11-01

    In this work, a new method based on headspace-single drop microextraction for the determination of residual acetone in cosmetics by microfluorospectrometry is proposed. Acetone causes fluorescence changes in a 2.5 µL-ethanolic drop (40% v/v) containing 3.10(-4) mol L(-1) 7-hydroxy-4-methylcoumarin ('turn off') or 6.10(-6) mol L(-1) 7-diethylamino-4-methylcoumarin ('turn on'). Polarity and ability to form hydrogen bonds of short chain alcohols (polar protic solvents) were crucial in order to observe these changes in the presence of acetone (polar aprotic solvent). Parameters related with the HS-SDME procedure were studied, namely headspace volume, composition, volume and temperature of drop, microextraction time, stirring rate, mass and temperature of sample, as well as the effect of potential interferents (alcohols and fragrances). The high volatility of acetone allows its extraction from an untreated cosmetic sample within 3 min. A detection limit of 0.26 µg g(-1) and repeatability, expressed as relative standard deviation, around 5% were reached. Accuracy of the proposed methodology was evaluated by means of recovery studies. The method was successfully used to analyze different cosmetics. Simplicity and high sample throughput can be highlighted. Copyright © 2014 Elsevier B.V. All rights reserved.

  7. Scatter radiation breast exposure during head CT: impact of scanning conditions and anthropometric parameters on shielded and unshielded breast dose

    International Nuclear Information System (INIS)

    Klasic, B.; Knezevic, Z.; Vekic, B.; Brnic, Z.; Novacic, K.

    2006-01-01

    Constantly increasing clinical requests for CT scanning of the head on our facility continue to raise concern regarding radiation exposure of patients, especially radiosensitive tissues positioned close to the scanning plane. The aim of our prospective study was to estimate scatter radiation doses to the breast from routine head CT scans, both with and without use of lead shielding, and to establish influence of various technical and anthropometric factors on doses using statistical data analysis. In 85 patient referred to head CT for objective medical reasons, one breast was covered with lead apron during CT scanning. Radiation doses were measured at skin of both breasts and over the apron simultaneously, by the use of thermo luminescent dosimeters. The doses showed a mean reduction by 37% due to lead shielding. After we statistically analyzed our data, we observed significant correlation between under-the-shield dose and values of technical parameters. We used multiple linear regression model to describe the relationships of doses to unshielded and shielded breast respectively, with anthropometric and technical factors. Our study proved lead shielding of the breast to be effective, easy to use and leading to a significant reduction in scatter dose. (author)

  8. Scatter radiation breast exposure during head CT: impact of scanning conditions and anthropometric parameters on shielded and unshielded breast dose

    Energy Technology Data Exchange (ETDEWEB)

    Klasic, B. [Hospital for pulmonary diseases, Zagreb (Croatia); Knezevic, Z.; Vekic, B. [Rudjer Boskovic Institute, Zagreb (Croatia); Brnic, Z.; Novacic, K. [Merkur Univ. Hospital, Zagreb (Croatia)

    2006-07-01

    Constantly increasing clinical requests for CT scanning of the head on our facility continue to raise concern regarding radiation exposure of patients, especially radiosensitive tissues positioned close to the scanning plane. The aim of our prospective study was to estimate scatter radiation doses to the breast from routine head CT scans, both with and without use of lead shielding, and to establish influence of various technical and anthropometric factors on doses using statistical data analysis. In 85 patient referred to head CT for objective medical reasons, one breast was covered with lead apron during CT scanning. Radiation doses were measured at skin of both breasts and over the apron simultaneously, by the use of thermo luminescent dosimeters. The doses showed a mean reduction by 37% due to lead shielding. After we statistically analyzed our data, we observed significant correlation between under-the-shield dose and values of technical parameters. We used multiple linear regression model to describe the relationships of doses to unshielded and shielded breast respectively, with anthropometric and technical factors. Our study proved lead shielding of the breast to be effective, easy to use and leading to a significant reduction in scatter dose. (author)

  9. Diamond turning of glass

    Energy Technology Data Exchange (ETDEWEB)

    Blackley, W.S.; Scattergood, R.O.

    1988-12-01

    A new research initiative will be undertaken to investigate the critical cutting depth concepts for single point diamond turning of brittle, amorphous materials. Inorganic glasses and a brittle, thermoset polymer (organic glass) are the principal candidate materials. Interrupted cutting tests similar to those done in earlier research are Ge and Si crystals will be made to obtain critical depth values as a function of machining parameters. The results will provide systematic data with which to assess machining performance on glasses and amorphous materials

  10. Information technology -- Local and metropolitan area networks -- Token ring access method and physical layer specifications -- Recommended practice for use of unshielded twisted pair cable (UTP) for token ring data transmission at 4-Mbit/s

    CERN Document Server

    International Organization for Standardization. Geneva

    1993-01-01

    Information technology -- Local and metropolitan area networks -- Token ring access method and physical layer specifications -- Recommended practice for use of unshielded twisted pair cable (UTP) for token ring data transmission at 4-Mbit/s

  11. Formation of space-charge bunches in a multivelocity-electron-beam-based microwave oscillator with a cathode unshielded from the magnetic field

    Energy Technology Data Exchange (ETDEWEB)

    Kalinin, Yu. A.; Starodubov, A. V.; Fokin, A. S., E-mail: alexander1989fokin@mail.ru [Saratov State University (Russian Federation)

    2017-02-15

    The influence of the magnitude and configuration of the magnetic field on the parameters of electron bunches formed in a multivelocity electron beam is analyzed. It is shown that the use of a cathode unshielded from the magnetic field and a nonuniform magnetic field increasing along the drift space enables the formation of compact electron bunches. The ratio between the current density in such bunches and the beam current density at the entrance to the drift space reaches 10{sup 6}, which results in a substantial broadening of the output microwave spectrum due to an increase in the amplitudes of the higher harmonics of the fundamental frequency.

  12. Comparison of neutron fluxes in an 18-MeV unshielded cyclotron room and a 16.5-MeV self-shielded cyclotron room.

    Science.gov (United States)

    Fujibuchi, Toshioh; Horitsugi, Genki; Yamaguchi, Ichiro; Eto, Akihisa; Iwamoto, Yasuo; Obara, Satoshi; Iimori, Takashi; Masuda, Yoshitada; Watanabe, Hiroshi; Hatazawa, Jun

    2012-07-01

    Some medical compact cyclotrons have self-shielding to reduce neutron fluxes. Thermal neutron fluxes in an 18-MeV unshielded cyclotron room and in a 16.5-MeV self-shielded cyclotron room were evaluated. In addition, the radioactivities in concrete and metals due to thermal neutrons in the cyclotron rooms for 30 years were calculated of operation such that the sum of the ratio of the nuclide concentration to the nuclide clearance level was equal to 1. The thermal neutron flux from the unshielded cyclotron was approximately 10(2) cm(-2) s(-1), whereas that from the self-shielded cyclotron was approximately 10(2) cm(-2) s(-1). The thermal neutron fluxes for concrete, stainless steel, vessel steel, and aluminum that reached their clearance levels were 9.80 × 10(4), 2.17 × 10(3), 1.87 × 10(4), and 2.41 × 10(5) cm(-2) s(-1), respectively. The specific activities in the cyclotron room were found to be sufficiently below the clearance level when the self-shield was employed.

  13. Diamond turning of thermoplastic polymers

    Energy Technology Data Exchange (ETDEWEB)

    Smith, E.; Scattergood, R.O.

    1988-12-01

    Single point diamond turning studies were made using a series of thermoplastic polymers with different glass transition temperatures. Variations in surface morphology and surface roughness were observed as a function of cutting speed. Lower glass transition temperatures facilitate smoother surface cuts and better surface finish. This can be attributed to the frictional heating that occurs during machining. Because of the very low glass transition temperatures in polymeric compared to inorganic glasses, the precision machining response can be very speed sensitive.

  14. The Local Turn

    NARCIS (Netherlands)

    Warren, Carol; Visser, Leontine

    2016-01-01

    The local turn in good governance theory and practice responded to critiques of the ineffectiveness of state management and the inequity of privatization alternatives in natural resource management. Confounding expectations of greater effectiveness from decentralised governance, including

  15. Turning Sunlight into Electricity

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 11; Issue 7. Turning Sunlight into Electricity - Inorganic Solar Cells and Beyond. A K Shukla. General Article Volume 11 Issue 7 July 2006 pp 42-50. Fulltext. Click here to view fulltext PDF. Permanent link:

  16. Turning lead into gold

    DEFF Research Database (Denmark)

    Jensen, Steffen Moltrup Ernø

    For years the field of entrepreneurship has been blinded by the alchemical promise of turning lead into gold, of finding the ones most likely to become the next Branson, Zuckerberg or Gates. The promise has been created in the midst of political and scientific agendas where certain individuals...

  17. Turning to alcohol?

    International Nuclear Information System (INIS)

    Reiboro, S.K.

    1998-01-01

    Brazil is examining whether turning to alcohol could solve its problems. The fuel alcohol producers are lobbying hard for the government to increase the use of alcohol to fuel the country's cars. Not only does using alcohol reduce CO 2 , runs the argument, but the Kyoto agreement might just attract international financing for the project. (author)

  18. Hungary's U-Turn

    OpenAIRE

    Kornai, János

    2015-01-01

    For two decades Hungary, like the other Eastern European countries, followed a general policy of establishing and strengthening the institutions of democracy, rule of law, and a market economy based on private property. However, since the elections of 2010, when Viktor Orbán's Fidesz party came to power, Hungary has made a dramatic U-turn. This article investigates the different spheres of society: political institutions, the rule of law, and the influence of state and market on one another, ...

  19. Turning Desirements into Requirements

    Science.gov (United States)

    2015-09-01

    27 Defense AT&L: September–October 2015 Turning “Desirements” into Requirements Charles Court Court is the Requirements Center Director at the...Defense Systems Management College at the Defense Acquisition University at Fort Belvoir, Virginia. He is a former Wild Weasel Electronic Warfare Officer...a Mustang would do much better. (The author wanted the Aston Martin from the movie “Goldfinger.” You know: The one with the ejection seat, automated

  20. Turning scar into muscle.

    Science.gov (United States)

    de Carvalho, Antonio Carlos Campos; Carvalho, Adriana Bastos

    2012-09-26

    After the demonstration that somatic cells could be reprogrammed to a pluripotent state, exciting new prospects were opened for the cardiac regeneration field. It did not take long for the development of strategies to convert somatic cells directly into cardiomyocytes. Despite the intrinsic difficulties of cell reprogramming, such as low efficiency, the therapeutic possibilities created by the ability to turn scar into muscle are enormous. Here, we discuss some of the major advances and strategies used in direct cardiac reprogramming and examine discrepancies and concerns that still need to be resolved in the field.

  1. Fermilab turns 50! Congratulations!

    CERN Multimedia

    Staff Association

    2017-01-01

    This year Fermilab turns 50 and the celebrations are ongoing. The ties between CERN and Fermilab are numerous and have been ranging from competition between two labs at the forefront of their field, e.g. with the chase of the top quark, finally discovered by Fermilab, to outright collaboration, e.g. on LHC low-beta quadrupole magnet development and production and in the CMS collaboration. In June, in the name of the CERN staff and scientific community, the CERN Staff Association sent a message to the Fermilab staff and scientific community, through Dr. Nigel Lockyer, Fermilab Director. The letter, and the assurance from Nigel Lockyer that the message has been passed onto the Fermilab community can be found on our website. Congratulations to Fermilab on its fiftieth Anniversary, and to the staff and collaborators who made this laboratory through their hard work, dedication and vision!

  2. The Affective Turn

    Directory of Open Access Journals (Sweden)

    Alí Lara

    2013-11-01

    Full Text Available In the last decade studies on affect and emotions have become relevant in the social sciences. This is not just a fad guideline, but instead a simultaneous reader of public life changes and subjective experience, from which it is also being transformed the knowledge production. Such a trend has been known as ‘The Affective Turn’ within the Anglophone Academy. Here we will translate it as ‘El Giro Afectivo’. This turn, so far, has not dabbled in the social science literature that is written in Spanish. This paper draws on a singular panorama of discussions about contemporary social studies of affect and emotion, and it’s vertebrate by some of its expressions in the contemporary academy.

  3. Turning Sunlight into Electricity

    Indian Academy of Sciences (India)

    module' or a 'solar panel' that provides a useful voltage and current. The efficiency of silicon solar cells for the conversion of light energy to electricity has increased steadily over the years to present values of up to 18% for amorphous silicon, and 25% for single crystal cells. At the same time, the cost of cells has fallen.

  4. Turn Continuation and Clause Combinations

    Science.gov (United States)

    Couper-Kuhlen, Elizabeth

    2012-01-01

    This article explores the viability of the analytic distinction between "turn-constructional unit (TCU) continuation" (i.e., continuing a turn beyond a point of possible completion with grammatically dependent material) and "new TCU" (i.e., continuing a turn with grammatically independent material) when hypotactic clause combinations are involved.…

  5. Sandstone Turning by Abrasive Waterjet

    Czech Academy of Sciences Publication Activity Database

    Hlaváček, Petr; Cárach, J.; Hloch, Sergej; Vasilko, K.; Klichová, Dagmar; Klich, Jiří; Lehocká, D.

    2015-01-01

    Roč. 48, č. 6 (2015), s. 2489-2493 ISSN 0723-2632 R&D Projects: GA MŠk ED2.1.00/03.0082; GA MŠk(CZ) LO1406 Institutional support: RVO:68145535 Keywords : turning away from the jet * conventional turning towards the jet * sandstone * abrasive water jet Subject RIV: JQ - Machines ; Tools Impact factor: 2.386, year: 2015 http://www.springerprofessional.de/sandstone-turning-by-abrasive-waterjet/6038028.html

  6. Sandstone Turning by Abrasive Waterjet

    Czech Academy of Sciences Publication Activity Database

    Hlaváček, Petr; Cárach, J.; Hloch, Sergej; Vasilko, K.; Klichová, Dagmar; Klich, Jiří; Lehocká, D.

    2015-01-01

    Roč. 48, č. 6 (2015), s. 2489-2493 ISSN 0723-2632 R&D Projects: GA MŠk ED2.1.00/03.0082; GA MŠk(CZ) LO1406 Institutional support: RVO:68145535 Keywords : turning away from the jet * conventional turning towards the jet * sandstone * abrasive water jet Subject RIV: JQ - Machines ; Tools Impact factor: 2.386, year: 2015 http://www.springerprofessional.de/sandstone-turning-by-abrasive- water jet/6038028.html

  7. Turning patients over in bed

    Science.gov (United States)

    ... this page: //medlineplus.gov/ency/patientinstructions/000426.htm Turning patients over in bed To use the sharing features on this page, ... Patient The following steps should be followed when turning a patient: If you can, raise the bed to a level that reduces back strain for ...

  8. Turning collectors for solar radiation

    Science.gov (United States)

    Barak, Amitzur Z.

    1976-01-01

    A device is provided for turning a solar collector about the polar axis so that the collector is directed toward the sun as the sun tracks the sky each day. It includes two heat-expansive elements and a shadow plate. In the morning a first expansive element is heated, expands to turn the collector to face the sun, while the second expansive element is shaded by the plate. In the afternoon the second element is heated, expands to turn the collector to face the sun, while the first is shaded by the plate.

  9. What 'empirical turn in bioethics'?

    Science.gov (United States)

    Hurst, Samia

    2010-10-01

    Uncertainty as to how we should articulate empirical data and normative reasoning seems to underlie most difficulties regarding the 'empirical turn' in bioethics. This article examines three different ways in which we could understand 'empirical turn'. Using real facts in normative reasoning is trivial and would not represent a 'turn'. Becoming an empirical discipline through a shift to the social and neurosciences would be a turn away from normative thinking, which we should not take. Conducting empirical research to inform normative reasoning is the usual meaning given to the term 'empirical turn'. In this sense, however, the turn is incomplete. Bioethics has imported methodological tools from empirical disciplines, but too often it has not imported the standards to which researchers in these disciplines are held. Integrating empirical and normative approaches also represents true added difficulties. Addressing these issues from the standpoint of debates on the fact-value distinction can cloud very real methodological concerns by displacing the debate to a level of abstraction where they need not be apparent. Ideally, empirical research in bioethics should meet standards for empirical and normative validity similar to those used in the source disciplines for these methods, and articulate these aspects clearly and appropriately. More modestly, criteria to ensure that none of these standards are completely left aside would improve the quality of empirical bioethics research and partly clear the air of critiques addressing its theoretical justification, when its rigour in the particularly difficult context of interdisciplinarity is what should be at stake.

  10. Turning rice meiosis into mitosis.

    Science.gov (United States)

    Mieulet, Delphine; Jolivet, Sylvie; Rivard, Maud; Cromer, Laurence; Vernet, Aurore; Mayonove, Pauline; Pereira, Lucie; Droc, Gaëtan; Courtois, Brigitte; Guiderdoni, Emmanuel; Mercier, Raphael

    2016-11-01

    Introduction of clonal reproduction through seeds (apomixis) in crops has the potential to revolutionize agriculture by allowing self-propagation of any elite variety, in particular F1 hybrids. In the sexual model plant Arabidopsis thaliana synthetic clonal reproduction through seeds can be artificially implemented by (i) combining three mutations to turn meiosis into mitosis (MiMe) and (ii) crossing the obtained clonal gametes with a line expressing modified CENH3 and whose genome is eliminated in the zygote. Here we show that additional combinations of mutations can turn Arabidopsis meiosis into mitosis and that a combination of three mutations in rice (Oryza sativa) efficiently turns meiosis into mitosis, leading to the production of male and female clonal diploid gametes in this major crop. Successful implementation of the MiMe technology in the phylogenetically distant eudicot Arabidopsis and monocot rice opens doors for its application to any flowering plant and paves the way for introducing apomixis in crop species.

  11. Optimum transfer between hyperbolic asymptotes with turn angle less than the maximum natural turn angle.

    Science.gov (United States)

    Walton, J. M.; Marchal, C.; Culp, R. D.

    1971-01-01

    The impulsive transfer of minimum characteristic velocity between two given hyperbolic asymptotes associated with a real planet is considered. The constraint of remaining above the surface of the planet introduces a maximum natural turn angle. This divides the problem naively into two categories. The first is the case when the turn angle required by the given asymptotes is less than or equal to the maximum natural turn angle. This is the more reasonable situation for a swingby maneuver, and is the case considered in this paper. The resulting optimal transfers are of five basic types. In boundary conditions space, by far the largest area of transfers are either single impulse transfers or transfers through the parabolic level requiring two finite impulses. In no case has an optimal transfer been found which uses more than two finite impulses and three infinitesimal impulses. Complete results are presented for the case in which the given turn angle is less than or equal to the maximum natural turn angle.

  12. Professional Employees Turn to Unions

    Science.gov (United States)

    Chamot, Dennis

    1976-01-01

    White-collar and professional employees are increasingly turning to unions to combat their loss of independence as employees of large organizations. Managers should realize that they and professional employees have different viewpoints about job situations and that the current trend toward white-collar unionism is apt to continue. (JG)

  13. Hamilton's theory of turns revisited

    Indian Academy of Sciences (India)

    We present a new approach to Hamilton's theory of turns for the groups. SO(3) and SU(2) which renders their properties, in particular their composition law, nearly trivial and immediately evident upon inspection. We show that the entire con- struction can be based on binary rotations rather than mirror reflections. Keywords.

  14. The Philosophy of Turning Points

    DEFF Research Database (Denmark)

    Turcan, Romeo V.

    2013-01-01

    This paper introduces and discusses the concept of turning points from the ontological, epistemological, and methodological perspectives, applying it to the de-internationalization phenomenon to exemplify its deployment. As a concept that adds to the variance and complexity of the international b...

  15. Why Does Hair Turn Gray?

    Science.gov (United States)

    ... out, but people with naturally lighter hair are just as likely to go gray. From the time a person notices a few gray hairs, it may take more than 10 years for all of that person's hair to turn ... really believe that this happens. Just in case, try not to freak out your ...

  16. Phenomenology and the Empirical Turn

    NARCIS (Netherlands)

    Zwier, Jochem; Blok, Vincent; Lemmens, Pieter

    2016-01-01

    This paper provides a phenomenological analysis of postphenomenological philosophy of technology. While acknowledging that the results of its analyses are to be recognized as original, insightful, and valuable, we will argue that in its execution of the empirical turn, postphenomenology forfeits

  17. Hamilton's theory of turns revisited

    Indian Academy of Sciences (India)

    MS received 16 July 2009; accepted 1 September 2009. Abstract. We present a new approach to Hamilton's theory of turns for the groups. SO(3) and SU(2) which renders their properties, in particular their composition law, nearly trivial and immediately evident upon inspection. We show that the entire con- struction can be ...

  18. Opposed turns at signalized intersections

    Energy Technology Data Exchange (ETDEWEB)

    Akcelik, R.

    1989-06-01

    The 1985 Highway Capacity Manual (HCM) brought the U.S. and Australian methodologies for signalized intersections closer together. An important element in this methodology is the techniques used for the estimation of opposed (permissive) turn saturation flows. Although the basic modeling philosophies of the HCM and Australian methods are similar, there are significant differences in the procedures used and therefore in the results from the two methods. In particular, the latest methodology employed in the SIDRA software has eliminated the use of opposed turn adjustment factors for lane groups and adopted an explicit and direct method of modeling individual lanes. The purpose of this paper is to bring these new methods to the attention of the U.S. researchers since it is understood that efforts are being made to improve the 1985 HCM method.

  19. Diamond turning machine controller implementation

    Energy Technology Data Exchange (ETDEWEB)

    Garrard, K.P.; Taylor, L.W.; Knight, B.F.; Fornaro, R.J.

    1988-12-01

    The standard controller for a Pnuemo ASG 2500 Diamond Turning Machine, an Allen Bradley 8200, has been replaced with a custom high-performance design. This controller consists of four major components. Axis position feedback information is provided by a Zygo Axiom 2/20 laser interferometer with 0.1 micro-inch resolution. Hardware interface logic couples the computers digital and analog I/O channels to the diamond turning machine`s analog motor controllers, the laser interferometer, and other machine status and control information. It also provides front panel switches for operator override of the computer controller and implement the emergency stop sequence. The remaining two components, the control computer hardware and software, are discussed in detail below.

  20. Turning points in reactor design

    Energy Technology Data Exchange (ETDEWEB)

    Beckjord, E.S.

    1995-09-01

    This article provides some historical aspects on nuclear reactor design, beginning with PWR development for Naval Propulsion and the first commercial application at Yankee Rowe. Five turning points in reactor design and some safety problems associated with them are reviewed: (1) stability of Dresden-1, (2) ECCS, (3) PRA, (4) TMI-2, and (5) advanced passive LWR designs. While the emphasis is on the thermal-hydraulic aspects, the discussion is also about reactor systems.

  1. Turning points in reactor design

    International Nuclear Information System (INIS)

    Beckjord, E.S.

    1995-01-01

    This article provides some historical aspects on nuclear reactor design, beginning with PWR development for Naval Propulsion and the first commercial application at Yankee Rowe. Five turning points in reactor design and some safety problems associated with them are reviewed: (1) stability of Dresden-1, (2) ECCS, (3) PRA, (4) TMI-2, and (5) advanced passive LWR designs. While the emphasis is on the thermal-hydraulic aspects, the discussion is also about reactor systems

  2. Turn-by-Turn Imaging of the Transverse Beam Profile in PEP-II

    Energy Technology Data Exchange (ETDEWEB)

    Fisher, Alan A.; Petree, Mark; /SLAC

    2006-12-18

    During injection or instability, the transverse profile of an individual bunch in a storage ring can change significantly in a few turns. However, most synchrotron-light imaging techniques are not designed for this time scale. We have developed a novel diagnostic that enhances the utility of a fast gated camera by adding, inexpensively, some features of a dual-axis streak camera, in order to watch the turn-by-turn evolution of the transverse profile, in both x and y. The beam's elliptical profile is reshaped using cylindrical lenses to form a tall and narrow ellipse--essentially the projection of the full ellipse onto one transverse axis. We do this projection twice, by splitting the beam into two paths at different heights, and rotating the ellipse by 90{sup o} on one path. A rapidly rotating mirror scans these vertical ''pencils'' of light horizontally across the photocathode of the camera, which is gated for 3 ns on every Nth ring turn. A single readout of the camera captures 100 images, looking like a stroboscopic photograph of a moving object. We have observed the capture of injected charge into a bunch and the rapid change of beam size at the onset of a fast instability.

  3. The affective turn in ethnomusicology

    Directory of Open Access Journals (Sweden)

    Hofman Ana

    2015-01-01

    Full Text Available The affective turn, which has already questioned dominant paradigms in many disciplinary fields including cultural studies, philosophy, political theory, anthropology, psychology and neuroscience, has started to attract more attention in the field of ethnomusicology, becoming a particularly vibrant stream of thought. Drawing on the voices that call for the historicisation of and critical deliberation on the field of affect studies, the article strives to show how theories of affect might expand dominant paradigms in ethnomusicology and also points to their limitations.

  4. Model-independent analysis of the Fermilab Tevatron turn-by-turn beam position monitor measurements

    Energy Technology Data Exchange (ETDEWEB)

    Petrenko, A.V.; /Novosibirsk, IYF; Valishev, A.A.; Lebedev, V.A.; /Fermilab

    2011-09-01

    Coherent transverse beam oscillations in the Tevatron were analyzed with the model-independent analysis (MIA) technique. This allowed one to obtain the model-independent values of coupled betatron amplitudes, phase advances, and dispersion function around the ring from a single dipole kick measurement. In order to solve the MIA mode mixing problem which limits the accuracy of determination of the optical functions, we have developed a new technique of rotational MIA mode untangling. The basic idea is to treat each beam position monitor (BPM) as two BPMs separated in a ring by exactly one turn. This leads to a simple criterion of MIA mode separation: the betatron phase advance between any BPM and its counterpart shifted by one turn should be equal to the betatron tune and therefore should not depend on the BPM position in the ring. Furthermore, we describe a MIA-based technique to locate vibrating magnets in a storage ring.

  5. Recent developments in turning hardened steels - A review

    Science.gov (United States)

    Sivaraman, V.; Prakash, S.

    2017-05-01

    Hard materials ranging from HRC 45 - 68 such as hardened AISI H13, AISI 4340, AISI 52100, D2 STL, D3 STEEL Steel etc., need super hard tool materials to machine. Turning of these hard materials is termed as hard turning. Hard turning makes possible direct machining of the hard materials and also eliminates the lubricant requirement and thus favoring dry machining. Hard turning is a finish turning process and hence conventional grinding is not required. Development of the new advanced super hard tool materials such as ceramic inserts, Cubic Boron Nitride, Polycrystalline Cubic Boron Nitride etc. enabled the turning of these materials. PVD and CVD methods of coating have made easier the production of single and multi layered coated tool inserts. Coatings of TiN, TiAlN, TiC, Al2O3, AlCrN over cemented carbide inserts has lead to the machining of difficult to machine materials. Advancement in the process of hard machining paved way for better surface finish, long tool life, reduced tool wear, cutting force and cutting temperatures. Micro and Nano coated carbide inserts, nanocomposite coated PCBN inserts, micro and nano CBN coated carbide inserts and similar developments have made machining of hardened steels much easier and economical. In this paper, broad literature review on turning of hardened steels including optimizing process parameters, cooling requirements, different tool materials etc., are done.

  6. Models and Algorithms for Tracking Target with Coordinated Turn Motion

    Directory of Open Access Journals (Sweden)

    Xianghui Yuan

    2014-01-01

    Full Text Available Tracking target with coordinated turn (CT motion is highly dependent on the models and algorithms. First, the widely used models are compared in this paper—coordinated turn (CT model with known turn rate, augmented coordinated turn (ACT model with Cartesian velocity, ACT model with polar velocity, CT model using a kinematic constraint, and maneuver centered circular motion model. Then, in the single model tracking framework, the tracking algorithms for the last four models are compared and the suggestions on the choice of models for different practical target tracking problems are given. Finally, in the multiple models (MM framework, the algorithm based on expectation maximization (EM algorithm is derived, including both the batch form and the recursive form. Compared with the widely used interacting multiple model (IMM algorithm, the EM algorithm shows its effectiveness.

  7. Isentropic compression studies using the NHMFL single turn

    Energy Technology Data Exchange (ETDEWEB)

    Tasker, Douglas G [Los Alamos National Laboratory; Mielke, Charles [Los Alamos National Laboratory; Rodriguez, George [Los Alamos National Laboratory; Rickel, Dwight [Los Alamos National Laboratory

    2010-10-19

    Magnetic isentropic compression experiments (ICE) provide the most accurate shock free compression data for materials at megabar stresses. Recent ICE experiments performed on the Sandia Z-machine (Asay, 1999) and at the Los Alamos High Explosive Pulsed Power facility (Tasker, 2006) are providing our nation with data on material properties in extreme dynamic high stress environments. The LANL National High Magnetic Field Laboratory (NHMFL) can offer a less complex ICE experiment at high stresses (up to {approx}1Mbar) with a high sample throughput and relatively low cost. This is not to say that the NHMFL technique will replace the other methods but rather complement them. For example, NHMFL-ICE is ideal for the development of advanced diagnostics, e.g., to detect phase changes. We will discuss the physics of the NHMFL-ICE experiments and present data from the first proof-of-principle experiments that were performed in September 2010.

  8. Turning nuclear communications inside out

    International Nuclear Information System (INIS)

    Besenyei, Elisabeth; Czibolya, Laszlo

    2002-01-01

    Due to debates on the security of energy supply in the European Union, the international efforts on the implementation of Kyoto protocol and the forthcoming liberalization of the electrical energy market the attention of Hungarian decision-makers was focused on energy related problems. Discussions started on the future role of nuclear power and anti-nuclear environmentalists became more active in their criticism. Changes were needed in the approach and practice of communication on nuclear energy. Previous practice turned to be inefficient in dialogue with different social and influential groups. Public information could not be considered any more as an activity explaining measures to cope with incidents and accidents or giving technical answers to mostly superficial statements on allegedly unsafe features and solutions in nuclear industry. It was time to change the paradigm and to turn the communication into a powerful tool to put forward the arguments, to show the achievements and facts and to explain the efforts in addressing public concerns. The new paradigm turned the previous outside-in approach to a new inside-out type of behavior. Instead of reacting to the attacks coming from outside the new approach means first of all commitment to be open and pro-active in communication and to act in close cooperation with all interested organizations and institutions. The three pillars of the new paradigm, commitment, communication and co-operation are applicable not only for the nuclear industry, but also for the governmental agencies (regulatory bodies, health and emergency authorities etc.) and for the wide range of technical, scientific and civil organizations. Public information should be turned from a burden to a challenge for open, technically valid and honest dialogue. This active communication approach is illustrated by some new initiatives in public information in Hungary. Following the successful Nuclear Academy for Journalists formed new Section of Nuclear

  9. Breaking New Ground with High Resolution Turn-By-Turn BPMs at the ESRF

    CERN Document Server

    Farvacque, L; Scheidt, K

    2001-01-01

    This High-Resolution, Turn-by-Turn BPM system is a low-cost extension to the existing BPM system, based on the RF-multiplexing concept, used for slow Closed-Orbit measurements. With this extension Beam Position measurements in both planes, at all (224) BPMs in the 844 m ESRF Storage Ring, for up to 2048 Orbit Turns with 1 μm resolution are performed. The data acquisition is synchronised to a single, flat 1 μs, transverse deflection kick to the 1μs beamfill in the 2.8μs revolution period. The high quality of this synchronisation, together with the good reproducibility of the deflection kick and the overall stability of the Closed Orbit beam allows to repeat the kick and acquisition in many cycles. The subsequent averaging of the data obtained in these cycles yields the 1um resolution. The latter allows lattice measurements with high precision such as the localisation of very small focussing errors and modulation in Beta values and phase advances. It also finds an unique ...

  10. Evaluation of cutting force uncertainty components in turning

    DEFF Research Database (Denmark)

    Axinte, Dragos Aurelian; Belluco, Walter; De Chiffre, Leonardo

    2000-01-01

    A procedure is proposed for the evaluation of those uncertainty components of a single cutting force measurement in turning that are related to the contributions of the dynamometer calibration and the cutting process itself. Based on an empirical model including errors form both sources, the unce...

  11. William Friedman, Geneticist Turned Cryptographer.

    Science.gov (United States)

    Goldman, Irwin L

    2017-05-01

    William Friedman (1891-1969), trained as a plant geneticist at Cornell University, was employed at Riverbank Laboratories by the eccentric millionaire George Fabyan to work on wheat breeding. Friedman, however, soon became intrigued by and started working on a pet project of Fabyan's involving the conjecture that Francis Bacon, a polymath known for the study of ciphers, was the real author of Shakespeare's plays. Thus, beginning in ∼1916, Friedman turned his attention to the so called "Baconian cipher," and developed decryption techniques that bore similarity to approaches for solving problems in population genetics. His most significant, indeed pathbreaking, work used ideas from genetics and statistics, focusing on analysis of the frequencies of letters in language use. Although he had transitioned from being a geneticist to a cryptographer, his earlier work had resonance in his later pursuits. He soon began working directly for the United States government and produced solutions used to solve complex military ciphers, in particular to break the Japanese Purple code during World War II. Another important legacy of his work was the establishment of the Signal Intelligence Service and eventually the National Security Agency. Copyright © 2017 by the Genetics Society of America.

  12. Notes on the Spatial Turn

    Directory of Open Access Journals (Sweden)

    Stipe Grgas

    2012-06-01

    Full Text Available On the basis of ever-mounting evidence, amongst which is the “zone” problematic of the Zadar conference that occassioned these notes, it can be concluded that the spatial turn has insinuated itself as an all-pervading heuristic tool throughout the humanities and the social sciences. The extent to which space and spatiality have usurped the central stage in the various branches of reasearch can be gauged by admonishments that what we are witnessing is a new fundamentalism that has simply inverted the terms of the dualism of time and space (May and Thrift 2001: “Introduction”. According to Michael Dear the sway of space is manifested in multifold ways: in the ubiquity of spatial analysis in social theories and practices; in the explosion of publications devoted to the exploration of the interface of the social and the spatial; in the reintegration of human geography into various domains of knowledge; in the focus given to difference and the consequent diversification of theoretical and empirical practices; in a theoretically informed exploration of the relation between geographical knowledge and social action; and, finally, in the unprecedented proliferation of research agendas and publications pertaining to these isuuses (Dear 2001: 24. Two recent collections of papers are indicative of the ubiquity of spatial issues in scholarly work.

  13. Clinical evaluation of an automated turning bed.

    Science.gov (United States)

    Melland, H I; Langemo, D; Hanson, D; Olson, B; Hunter, S

    1999-01-01

    The purposes of this study were to assess client comfort and sleep quality, client physiologic response (skin and respiratory status), the effect on the need for caregiver assistance, and cost when using an automated turning bed. Nonexperimental, evaluative study. Twenty-four adult home or long-term care resident subjects who had a degenerative disease, spinal cord injury, stroke, cerebral palsy, or back surgery. Each subject agreed to use the automated turning bed for four weeks. Researchers completed a demographic survey and skin assessment, and assessed each subject for pressure ulcer risk and for the need of assistance of a care giver for turning before and after the four weeks of using the turning bed. Subjects rated the turning bed in terms of comfort and sleep quality. Subjects rated the turning bed as more comfortable than their own bed and expressed satisfaction at the pain relief attained when on the turning bed. While using the turning bed, there was a significant improvement in sleep quality. No skin breakdown or deterioration in respiratory status occurred. Fewer subjects required the assistance of a caregiver for turning when on the turning bed. This automated turning bed shows great promise in meeting a need for patients with limited mobility whether they are homebound or in a residential community. Future studies that further investigate use of the turning bed for postoperative back patients while still in the acute care setting are indicated. Replicative studies with a larger sample size are also indicated.

  14. 32 CFR 636.23 - Turning movements.

    Science.gov (United States)

    2010-07-01

    ... Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY (CONTINUED) LAW ENFORCEMENT AND CRIMINAL... movements. (a) U-turns are prohibited on all streets in the cantonment area. (b) Right-turns will be made from a position as close to the right edge or right curb of the roadway as possible. (c) Left-turns...

  15. Realistic page-turning of electronic books

    Science.gov (United States)

    Fan, Chaoran; Li, Haisheng; Bai, Yannan

    2014-01-01

    The booming electronic books (e-books), as an extension to the paper book, are popular with readers. Recently, many efforts are put into the realistic page-turning simulation o f e-book to improve its reading experience. This paper presents a new 3D page-turning simulation approach, which employs piecewise time-dependent cylindrical surfaces to describe the turning page and constructs smooth transition method between time-dependent cylinders. The page-turning animation is produced by sequentially mapping the turning page into the cylinders with different radii and positions. Compared to the previous approaches, our method is able to imitate various effects efficiently and obtains more natural animation of turning page.

  16. Mechanics of the Fouetté turn.

    Science.gov (United States)

    Imura, Akiko; Yeadon, M R

    2010-12-01

    The Fouetté turn in classical ballet is performed repeatedly on one leg with swinging of the free limbs, producing a continued sequence of turns with one turn leading into the next. The purpose of this study was to determine the possible time history profiles of the twisting torque between the supporting leg and the remainder of the body that will allow continued performances of the Fouetté turn. Simulations were performed using a model which comprised the supporting leg and the remainder of the body to find torque profiles that maintain the initial angular velocity so that the state after one revolution is the same as the initial state. The solution space of torque profiles was determined for various rotation times and coefficients of friction between foot and floor. As the time for one revolution became shorter the solution space became smaller and for a given turn time there was a lower limit on the coefficient of friction. As the frictional coefficient became smaller the solution space became smaller and for a given coefficient there was a lower limit on the turn time. Turns of a given tempo can be performed on floors with different friction by modifying the twisting torque profile. When a turn is completed with a net change in angular velocity this can be compensated for in the next turn by adjusting the twisting torque profile. Copyright © 2010 Elsevier B.V. All rights reserved.

  17. A cultural turn in New Testament studies?

    African Journals Online (AJOL)

    2016-06-30

    Jun 30, 2016 ... The late twentieth century's 'linguistic turn' marked the beginning of a new consciousness in hermeneutics and even epistemology in New Testament (NT) studies.1 This turn was related to a larger spectrum of changes sometimes referred to as 'culture wars' in the human and social sciences.2 These ...

  18. performance characteristics of a cam turning attachment

    African Journals Online (AJOL)

    Dr Obe

    up of a suitable flexible shaft, a lathe spindle clutch and a shaft supported in ball bearings to carry and drive the master piece. This is shown in figure. 1. The hydraulic turning unit which is intended for cylindrical turning has been modified and used in conjunction with the drive system, as shown in figure. 2, for non cylindrical ...

  19. Towards a Practice Turn in EU Studies

    DEFF Research Database (Denmark)

    Adler-Nissen, Rebecca

    2016-01-01

    the potential of a practice turn in EU studies for both theory (overcoming dualism, replacing substantialism with processualism and rethinking power) and methods (including unstructured interviews, fieldwork and participant observation). A practice turn will force us to rethink core assumptions about the EU...

  20. Kantian Turning Point in Gadamer's Philosophical Hermeneutics

    Directory of Open Access Journals (Sweden)

    Kristína Bosáková

    2016-11-01

    Full Text Available The paper is treating the theme of a Kantian turning-point in the philosophical hermeneutics of H.- G. Gadamer based on of the harmonic relationship between metaphysics and science in Kantian philosophy from the point of view of the philosophical hermeneutics of Gadamer. The philosophical work of Kant had such an influence on Gadamer that without exaggerating we can talk about the Kantian turning-point in Gadamerian hermeneutics. Grondin, a former student of Gadamer, is talking about Kantian turning-point on the field of aesthetics, but in reality Kantian turning-point means much more than a mere change in the reception of the concept of judgement. It is a discovery of harmonical relationship between the beauty and the moral, between the reason and the sensitivity, between the modern sciences and the metaphysical tradition in the Kantian philosophy, made by Gadamer. This is what we call the Kantian turning-point in Gadamerian hermeneutics.

  1. METHODICAL MODEL FOR TEACHING BASIC SKI TURN

    Directory of Open Access Journals (Sweden)

    Danijela Kuna

    2013-07-01

    Full Text Available With the aim of forming an expert model of the most important operators for basic ski turn teaching in ski schools, an experiment was conducted on a sample of 20 ski experts from different countries (Croatia, Bosnia and Herzegovina and Slovenia. From the group of the most commonly used operators for teaching basic ski turn the experts picked the 6 most important: uphill turn and jumping into snowplough, basic turn with hand sideways, basic turn with clapping, ski poles in front, ski poles on neck, uphill turn with active ski guiding. Afterwards, ranking and selection of the most efficient operators was carried out. Due to the set aim of research, a Chi square test was used, as well as the differences between frequencies of chosen operators, differences between values of the most important operators and differences between experts due to their nationality. Statistically significant differences were noticed between frequencies of chosen operators (c2= 24.61; p=0.01, while differences between values of the most important operators were not obvious (c2= 1.94; p=0.91. Meanwhile, the differences between experts concerning thier nationality were only noticeable in the expert evaluation of ski poles on neck operator (c2=7.83; p=0.02. Results of current research are reflected in obtaining useful information about methodological priciples of learning basic ski turn organization in ski schools.

  2. 14 CFR 23.203 - Turning flight and accelerated turning stalls.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Turning flight and accelerated turning stalls. 23.203 Section 23.203 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF... a 30 degree bank. Reduce speed by steadily and progressively tightening the turn with the elevator...

  3. Cellular Reprogramming–Turning the Clock Back

    Indian Academy of Sciences (India)

    Cellular Reprogramming - Turning the Clock Back - Nobel Prize in Physiology or Medicine, 2012. Deepa Subramanyam ... Keywords. Embryonic stem cells; pluripotency; reprogramming; differentiation; Nobel Prize 2012. ... National Centre for Cell Science University of Pune Campus Ganeshkhind Pune 411 007, India.

  4. Turning university professors into competent learners

    NARCIS (Netherlands)

    Stefanova, Eliza; Ilieva, Miroslava; Nikolova, Nikolina; Stefanov, Krassen

    2008-01-01

    Stefanova, E., Ilieva, M., Nikolova, N, & Stefanov, K. (2008). Turning university professors into competent learners. In H. W. Sligte & R. Koper (Eds.), Proceedings of the 4th TENCompetence Open Workshop. Empowering Learners for Lifelong Competence Development: pedagogical, organisational and

  5. Page turning solutions for musicians: a survey.

    Science.gov (United States)

    Wolberg, George; Schipper, Irene

    2012-01-01

    Musicians have long been hampered by the challenge in turning sheet music while their hands are occupied playing an instrument. The sight of a human page turner assisting a pianist during a performance, for instance, is not uncommon. This need for a page turning solution is no less acute during practice sessions, which account for the vast majority of playing time. Despite widespread appreciation of the problem, there have been virtually no robust and affordable products to assist the musician. Recent progress in assistive technology and electronic reading devices offers promising solutions to this long-standing problem. The objective of this paper is to survey the technology landscape and assess the benefits and drawbacks of page turning solutions for musicians. A full range of mechanical and digital page turning products are reviewed.

  6. Conquering the Downwind Turn - SFTE Paper Followup

    National Research Council Canada - National Science Library

    Kolwey, Herman

    2000-01-01

    ...". That's 64 accidents per year to this problem, one piece of which is the turning downwind problem. It also States that: "The way human beings perceive their own movement is fairly well understood". I'm not so sure.

  7. Cellular Reprogramming–Turning the Clock Back

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 18; Issue 6. Cellular Reprogramming - Turning the Clock Back - Nobel Prize in Physiology or Medicine, 2012. Deepa Subramanyam. General Article Volume 18 Issue 6 June 2013 pp 514-521 ...

  8. Method of Rotational Turning With Multifaceted Cutters

    Science.gov (United States)

    Indakov, N.; Gordeev, Y.; Binchurov, A.

    2016-04-01

    The proposed method combines the elements of skew turning (in which a cut layer moves along the cutting edge) and rotary turning (in which the sections of the cutting edge are constantly renewed). This leads to better cooling and, hence, a longer tool life. The required cutting speed is ensured by selection of the required number of revolutions of the cutter; the rotation of the machined shaft corresponds to the rotary feed.

  9. Derrida’s Turn to Franciscan Philosophy

    Directory of Open Access Journals (Sweden)

    Marko Zlomislic

    2008-12-01

    Full Text Available Contemporary French philosophers such as Levinas, Bataille, and Derrida, along with the existentialists Kierkegaard and Nietzsche have all made use of Franciscan insights in order to safeguard the ipseity that cannot be reduced or totalized. In keeping with the taste that concerns me, this paper will examine Derrida’s turn to the poetry of Gerard Manley Hopkins and how such a turn may place Derrida within a catholic and Franciscan tradition.

  10. Bodily-visual practices and turn continuation.

    Science.gov (United States)

    Ford, Cecilia E; Thompson, Sandra A; Drake, Veronika

    2012-01-01

    This paper considers points in turn construction where conversation researchers have shown that talk routinely continues beyond possible turn completion, but where we find bodily-visual behavior doing such turn extension work. The bodily-visual behaviors we examine share many features with verbal turn extensions, but we argue that embodied movements have distinct properties that make them well-suited for specific kinds of social action, including stance display and by-play in sequences framed as subsidiary to a simultaneous and related verbal exchange. Our study is in line with a research agenda taking seriously the point made by Goodwin (2000a, b, 2003), Hayashi (2003, 2005), Iwasaki (2009), and others that scholars seeking to account for practices in language and social interaction do themselves a disservice if they privilege the verbal dimension; rather, as suggested in Stivers/Sidnell (2005), each semiotic system/modality, while coordinated with others, has its own organization. With the current exploration of bodily-visual turn extensions, we hope to contribute to a growing understanding of how these different modes of organization are managed concurrently and in concert by interactants in carrying out their everyday social actions.

  11. Turning points in the history of mathematics

    CERN Document Server

    Grant, Hardy

    2015-01-01

    This book explores some of the major turning points in the history of mathematics, ranging from ancient Greece to the present, demonstrating the drama that has often been a part of its evolution. Studying these breakthroughs, transitions, and revolutions, their stumbling-blocks and their triumphs, can help illuminate the importance of the history of mathematics for its teaching, learning, and appreciation. Some of the turning points considered are the rise of the axiomatic method (most famously in Euclid), and the subsequent major changes in it (for example, by David Hilbert); the “wedding,” via analytic geometry, of algebra and geometry; the “taming” of the infinitely small and the infinitely large; the passages from algebra to algebras, from geometry to geometries, and from arithmetic to arithmetics; and the revolutions in the late nineteenth and early twentieth centuries that resulted from Georg Cantor’s creation of transfinite set theory. The origin of each turning point is discussed, along with...

  12. First turn around strategy for RHIC

    International Nuclear Information System (INIS)

    Milutinovic, J.; Ruggiero, A.G.

    1991-01-01

    The authors present a strategy for achieving the so-called first turn around in RHIC. The strategy is based on the same method proposed to correct a distorted closed orbit in RHIC, i.e. on a generalization of the local three-bump method. They found out that the method is very effective in passing the beam through a non-ideal, insufficiently known, machine. The perturbed lattice was generated by the code PATRIS, which was also adapted to control the newly developed software. In ten distributions of errors the software was capable of passing the beam through in 2-3 injection attempts, at full sextupole strength. It was also determined that once the beam makes the first turn around and all the correctors are energized, it stays in the machine for at least several hundred turns

  13. CONNECTION OF TURN AHEAD AND TURN BACK WITH MOTORIC ABILITIES OF THE FIFTH GRADE STUDENTS

    Directory of Open Access Journals (Sweden)

    Jovica Petković

    2006-06-01

    Full Text Available The research is done for the purpose of determination and defining of the level of connection between some motoric abilities with success in realization of programmed contents from the area of gymnastics (turn ahead and turn back. The research is done on the sample of fifty one students from the fifth grade of Elementary School, on ten motoric tests and on two specific motoric assignments – turn ahead and turn back. The results of this research clearly point that there exist the multitude of statistically important coefficients of correlation between treated motoric abilities and applied motoric assignments.

  14. Seismic interferometry-turning noise into signal

    NARCIS (Netherlands)

    Curtis, A.; Gerstoft, P.; Sato, H.; Snieder, R.; Wapenaar, C.P.A.

    2006-01-01

    Turning noise into useful data—every geophysicist's dream? And now it seems possible. The field of seismic interferometry has at its foundation a shift in the way we think about the parts of the signal that are currently filtered out of most analyses—complicated seismic codas (the multiply scattered

  15. Business Intelligence: Turning Knowledge into Power

    Science.gov (United States)

    Endsley, Krista

    2009-01-01

    Today, many school districts are turning to business intelligence tools to retrieve, organize, and share knowledge for faster analysis and more effective, guided decision making. Business intelligence (BI) tools are the technologies and applications that gather and report information to help an organization's leaders make better decisions. BI…

  16. Speed docking: reducing truck turn times

    NARCIS (Netherlands)

    Ploos van Amstel, W.

    2013-01-01

    Truck turn times in FMCG supply chain are unreliable. The Dutch ‘Speed Docking’ project in gave clear evidence to this. The result is too many trucks and drivers. FMCG producers, together with logistics service providers and customers, can realise improvements with the use of mobile communication,

  17. The dynamic turn in quantum logic

    NARCIS (Netherlands)

    Baltag, Alexandru; Smets, Sonja

    In this paper we show how ideas coming from two areas of research in logic can reinforce each other. The first such line of inquiry concerns the "dynamic turn" in logic and especially the formalisms inspired by Propositional Dynamic Logic (PDL); while the second line concerns research into the

  18. Strategy in Generative Planning of Turning Processes

    NARCIS (Netherlands)

    van Houten, Frederikus J.A.M.; Kals, H.J.J.

    1986-01-01

    This paper reports on the process and operations planning system ROUND and the strategies which underlie the decision making processes in the planning of turning operations. At first, an outline is given about the environment for which generative systems like ROUND are being developed. The

  19. Train turn restrictions and line plan performance

    DEFF Research Database (Denmark)

    Burggraeve, Sofie; Bull, Simon Henry; Lusby, Richard Martin

    In this paper we study the impact of the `turn conditions' in end stations on the performance of a line plan. If trains have to turn on their platform in an end station, the yoccupy the platform for several minutes. A more preferred option, from a timetabling point of view, would be that a train...... disappears from the platform in its end station after dwelling and only appears again when departing for a subsequent trip. In this case, the train will not interfere with other trains that dwell on the platform during the time between these events. However, this option is only possible if the train can stay...... in a exible and large enough shunt. Starting from a given line plan, we compare two timetables, one where trains have to turn on their platform and one where trains can turn in a shunt. We evaluate the impact on the performance of the line plan by its feasibility for timetabling,the minimum overall buffer...

  20. Silicon Carbide Emitter Turn-Off Thyristor

    Directory of Open Access Journals (Sweden)

    Jun Wang

    2008-01-01

    Full Text Available A novel MOS-controlled SiC thyristor device, the SiC emitter turn-off thyristor (ETO is a promising technology for future high-voltage switching applications because it integrates the excellent current conduction capability of a SiC thyristor with a simple MOS-control interface. Through unity-gain turn-off, the SiC ETO also achieves excellent Safe Operation Area (SOA and faster switching speeds than silicon ETOs. The world's first 4.5-kV SiC ETO prototype shows a forward voltage drop of 4.26 V at 26.5 A/cm2 current density at room and elevated temperatures. Tested in an inductive circuit with a 2.5 kV DC link voltage and a 9.56-A load current, the SiC ETO shows a fast turn-off time of 1.63 microseconds and a low 9.88 mJ turn-off energy. The low switching loss indicates that the SiC ETO could operate at about 4 kHz if 100 W/cm2 conduction and the 100 W/cm2 turn-off losses can be removed by the thermal management system. This frequency capability is about 4 times higher than 4.5-kV-class silicon power devices. The preliminary demonstration shows that the SiC ETO is a promising candidate for high-frequency, high-voltage power conversion applications, and additional developments to optimize the device for higher voltage (>5 kV and higher frequency (10 kHz are needed.

  1. -and -turns in proteins revisited: A new set of amino acid turn ...

    Indian Academy of Sciences (India)

    -turns (7153) and -turns (911) extracted from these proteins were used to derive a revised set of type-dependent amino acid positional preferences and potentials. Compared with previous results, the preference for proline, methionine and tryptophan has increased and the preference for glutamine, valine, glutamic acid ...

  2. Research of remote control system in turn by turn timing system

    International Nuclear Information System (INIS)

    Zhan Zhifeng; Xiao Yanguo; Ma Kui; Yin Zejie; Wu Xiaoyi

    2003-01-01

    In this paper, we introduce a remote control system which is used in a frequency dividing and time-delay module. This control system is based on client/server architecture, and RS232 serial communication protocol. This control system is used in timing system of NSRL turn by turn beam position monitor

  3. Immediate Effects of Clock-Turn Strategy on the Pattern and Performance of Narrow Turning in Persons With Parkinson Disease.

    Science.gov (United States)

    Yang, Wen-Chieh; Hsu, Wei-Li; Wu, Ruey-Meei; Lin, Kwan-Hwa

    2016-10-01

    Turning difficulty is common in people with Parkinson disease (PD). The clock-turn strategy is a cognitive movement strategy to improve turning performance in people with PD despite its effects are unverified. Therefore, this study aimed to investigate the effects of the clock-turn strategy on the pattern of turning steps, turning performance, and freezing of gait during a narrow turning, and how these effects were influenced by concurrent performance of a cognitive task (dual task). Twenty-five people with PD were randomly assigned to the clock-turn or usual-turn group. Participants performed the Timed Up and Go test with and without concurrent cognitive task during the medication OFF period. The clock-turn group performed the Timed Up and Go test using the clock-turn strategy, whereas participants in the usual-turn group performed in their usual manner. Measurements were taken during the 180° turn of the Timed Up and Go test. The pattern of turning steps was evaluated by step time variability and step time asymmetry. Turning performance was evaluated by turning time and number of turning steps. The number and duration of freezing of gait were calculated by video review. The clock-turn group had lower step time variability and step time asymmetry than the usual-turn group. Furthermore, the clock-turn group turned faster with fewer freezing of gait episodes than the usual-turn group. Dual task increased the step time variability and step time asymmetry in both groups but did not affect turning performance and freezing severity. The clock-turn strategy reduces turning time and freezing of gait during turning, probably by lowering step time variability and asymmetry. Dual task compromises the effects of the clock-turn strategy, suggesting a competition for attentional resources.Video Abstract available for more insights from the authors (see Supplemental Digital Content 1, http://links.lww.com/JNPT/A141).

  4. Bank-to-turn control technology survey for homing missiles

    Science.gov (United States)

    Riedel, F. W.

    1980-01-01

    The potential advantages of bank-to-turn control are summarized. Recent and current programs actively investigating bank-to-turn steering are reviewed and critical technology areas concerned with bank-to-turn control are assessed.

  5. Turning the Appliance Market Around towards A++

    DEFF Research Database (Denmark)

    Nørgaard, Jørgen; Brange, Birgitte; Guldbrandsen, Tom

    2007-01-01

    in the course of a few years. Where models C, D, E earlier dominated the market, the A, A+ and A++, came to dominate as the standard models in stock. Consequently, their prices dropped significantly. The theory of a rational market behavior is based on some assumptions, one being that full information...... energy efficient model within their specification, and 4) in the website are also listed the shops, where consumers can get the appliances at lowest prices. The latter was the most innovative and maybe also the most effective measure in the package. Results showed up as a permanent U-turn of the market...... is available to all actors. The website identifying to the consumers the shops with the lowest priced efficient models was a step in that direction, and the result did not fail to turn up....

  6. Measurement of tool forces in diamond turning

    Energy Technology Data Exchange (ETDEWEB)

    Drescher, J.; Dow, T.A.

    1988-12-01

    A dynamometer has been designed and built to measure forces in diamond turning. The design includes a 3-component, piezoelectric transducer. Initial experiments with this dynamometer system included verification of its predicted dynamic characteristics as well as a detailed study of cutting parameters. Many cutting experiments have been conducted on OFHC Copper and 6061-T6 Aluminum. Tests have involved investigation of velocity effects, and the effects of depth and feedrate on tool forces. Velocity has been determined to have negligible effects between 4 and 21 m/s. Forces generally increase with increasing depth of cut. Increasing feedrate does not necessarily lead to higher forces. Results suggest that a simple model may not be sufficient to describe the forces produced in the diamond turning process.

  7. When attempts at robbing prey turn fatal

    Science.gov (United States)

    Dejean, Alain; Corbara, Bruno; Azémar, Frédéric; Carpenter, James M.

    2012-07-01

    Because group-hunting arboreal ants spread-eagle insect prey for a long time before retrieving them, these prey can be coveted by predatory flying insects. Yet, attempting to rob these prey is risky if the ant species is also an effective predator. Here, we show that trying to rob prey from Azteca andreae workers is a fatal error as 268 out of 276 potential cleptobionts (97.1 %) were captured in turn. The ant workers hunt in a group and use the "Velcro®" principle to cling firmly to the leaves of their host tree, permitting them to capture very large prey. Exceptions were one social wasp, plus some Trigona spp. workers and flies that landed directly on the prey and were able to take off immediately when attacked. We conclude that in this situation, previously captured prey attract potential cleptobionts that are captured in turn in most of the cases.

  8. Abrasive Waterjet (AWJ) Titanium Tangental Turning Evaluation

    Czech Academy of Sciences Publication Activity Database

    Hloch, Sergej; Hlaváček, Petr; Vasilko, K.; Cárach, J.; Samardžič, I.; Kozak, D.; Ščučka, Jiří; Klich, Jiří; Klichová, Dagmar

    2014-01-01

    Roč. 53, č. 4 (2014), s. 537-540 ISSN 0543-5846 R&D Projects: GA MŠk ED2.1.00/03.0082 Institutional support: RVO:68145535 Keywords : titanium * abrasive waterjet turning * traverse speed Subject RIV: JQ - Machines ; Tools Impact factor: 0.959, year: 2014 http://public.carnet.hr/metalurg/Metalurgija/2014_vol_53/No_4/MET_53_4_537-540_Hloch.pdf

  9. Turning customer satisfaction measurements into action

    OpenAIRE

    Lervik-Olsen, Line; Witell, Lars; Gustafsson, Anders

    2014-01-01

    This is the authors’ final, accepted and refereed manuscript to the article. Publisher’s version available at http://dx.doi.org/10.1108/JOSM-01-2014-0025 Purpose – The purpose of this paper is to contribute to the literature on customer orientation by developing and empirically testing a model that attempts to explain the elements that constitute customer orientation and that, in turn, influence customer satisfaction. In particular, this study focuses on how service firms design, ...

  10. Turning points in climate change adaptation

    Directory of Open Access Journals (Sweden)

    Saskia Elisabeth. Werners

    2015-12-01

    Full Text Available Concerned decision makers increasingly pose questions as to whether current management practices are able to cope with climate change and increased climate variability. This signifies a shift in the framing of climate change from asking what its potential impacts are to asking whether it induces policy failure and unacceptable change. In this paper, we explore the background, feasibility, and consequences of this new framing. We focus on the specific situation in which a social-political threshold of concern is likely to be exceeded as a result of climate change, requiring consideration of alternative strategies. Action is imperative when such a situation is conceivable, and at this point climate change becomes particularly relevant to decision makers. We call this situation an "adaptation turning point." The assessment of adaptation turning points converts uncertainty surrounding the extent of a climate impact into a time range over which it is likely that specific thresholds will be exceeded. This can then be used to take adaptive action. Despite the difficulty in identifying adaptation turning points and the relative newness of the approach, experience so far suggests that the assessment generates a meaningful dialogue between stakeholders and scientists. Discussion revolves around the amount of change that is acceptable; how likely it is that unacceptable, or more favorable, conditions will be reached; and the adaptation pathways that need to be considered under these circumstances. Defining and renegotiating policy objectives under climate change are important topics in the governance of adaptation.

  11. FCC-hh turn-around cycle

    CERN Document Server

    Alemany Fernandez, Reyes; Bartmann, Wolfgang; Buffat, Xavier; Niemi, Arto; Schulte, Daniel; Solfaroli Camillocci, Matteo; Stoel, Linda

    2016-01-01

    The turn-around cycle time of a collider is defined as the time spent between the end of stable beams and the start of the next stable beams period, and its calculation is of fundamental importance. On one side it is a crucial ingredient for the computation of the optimal time spent in luminosity production, which defines the integrated luminosity per fill or store. On the other side, combined with the availability and reliability of the machine, it allows to perform a detailed breakdown of the operational performance of the collider over an operational season, i.e. percentage of time in stable beams and beam in the machine with respect to down time. This paper presents a preliminary operational cycle definition for the hadron-hadron Future Circular Collider, as a base line for estimating the corresponding turn-around time. The cycle definition is based on the Large Hadron Collider (LHC) operational cycle. Two turn-around times are presented, the theoretical one and a more realistic one based on the LHC exper...

  12. Beam Optics Measurements Through Turn by Turn Beam Position Data in the SLS

    CERN Document Server

    Zisopoulos, P; Streun, A; Ziemann, v

    2013-01-01

    Refined Fourier analysis of turn-by-turn (TBT) transverse position data measurements can be used for determining several beam properties of a ring, such as transverse tunes, optics functions, phases, chromatic properties and coupling. In particular, the Numerical Analysis of Fundamental Frequencies (NAFF) algorithm is used to analyse TBT data from the Swiss Light Source (SLS) storage ring in order to estimate on and off-momentum beam characteristics. Of particular interest is the potential of using the full position information within one turn in order to measure beam optics properties.

  13. Toward Real-Time Automated Detection of Turns during Gait Using Wearable Inertial Measurement Units

    Directory of Open Access Journals (Sweden)

    Domen Novak

    2014-10-01

    Full Text Available Previous studies have presented algorithms for detection of turns during gait using wearable sensors, but those algorithms were not built for real-time use. This paper therefore investigates the optimal approach for real-time detection of planned turns during gait using wearable inertial measurement units. Several different sensor positions (head, back and legs and three different detection criteria (orientation, angular velocity and both are compared with regard to their ability to correctly detect turn onset. Furthermore, the different sensor positions are compared with regard to their ability to predict the turn direction and amplitude. The evaluation was performed on ten healthy subjects who performed left/right turns at three amplitudes (22, 45 and 90 degrees. Results showed that turn onset can be most accurately detected with sensors on the back and using a combination of orientation and angular velocity. The same setup also gives the best prediction of turn direction and amplitude. Preliminary measurements with a single amputee were also performed and highlighted important differences such as slower turning that need to be taken into account.

  14. Assessing lexical, syntactic, and conceptual turn-by-turn alignment in conversations involving conflict and deception

    DEFF Research Database (Denmark)

    Duran, Nicholas; Fusaroli, Riccardo; Paxton, Alexandra

    2015-01-01

    -level linguistic alignment, we turn to a unique conversational context: one in which participants disagree or agree with each other about contentious sociopolitical topics, with the added element of one partner secretly taking a "devil's advocate" position. Our findings reveal that high-level intentional factors......Our goal is to present a novel systematic approach for automatically assessing conversational alignment across turn-by-turn exchanges, examining linguistic behavior at increasing levels of abstractness through lexical, syntactic, and conceptual similarity. Using the latest advances in Python......-based NLP tools, the procedure begins by taking conversational partners' turns and converting each into a lemmatized sequence of words, assigning part-of-speech tags and computing high-dimensional semantic vectors per each utterance. Words and part-of-speech tags are further sequenced into n-g! rams...

  15. Turn-by-Turn Analysis of Proton and Gold Beams at Injection in the AGS Booster

    International Nuclear Information System (INIS)

    Gardner, C.; Ahrens, L.; Williams, N.

    1999-01-01

    In this paper the authors describe the latest version of a program they have used for several years to acquire and analyze turn-by-turn data from pick-up electrodes in the AGS Booster during injection. The program determines several parameters of the injected beam including the tunes and the position and angle of the incoming beam. Examples are given for both proton and gold injection

  16. CERN PS Optical Properties Measured with Turn-By-Turn Orbit Data

    CERN Document Server

    Bach, T; Giovannozzi, M; Hernalsteens, C; Lachaize, A; Sterbini, G; Tom´as, R; Wasef, R

    2013-01-01

    The performance of the CERN Proton Synchrotron (PS) has been constantly increasing over the years both in terms of beam parameters (intensity and brightness) and beam manipulations (transverse and longitudinal splitting). This implies a very good knowledge of the linear and non-linear model of the ring. In this paper we report on a detailed campaign of beam measurements based on turn-by-turn orbit data aimed at measuring the optics in several conditions as well as the resonance driving terms.

  17. Hummingbirds control turning velocity using body orientation and turning radius using asymmetrical wingbeat kinematics.

    Science.gov (United States)

    Read, Tyson J G; Segre, Paolo S; Middleton, Kevin M; Altshuler, Douglas L

    2016-03-01

    Turning in flight requires reorientation of force, which birds, bats and insects accomplish either by shifting body position and total force in concert or by using left-right asymmetries in wingbeat kinematics. Although both mechanisms have been observed in multiple species, it is currently unknown how each is used to control changes in trajectory. We addressed this problem by measuring body and wingbeat kinematics as hummingbirds tracked a revolving feeder, and estimating aerodynamic forces using a quasi-steady model. During arcing turns, hummingbirds symmetrically banked the stroke plane of both wings, and the body, into turns, supporting a body-dependent mechanism. However, several wingbeat asymmetries were present during turning, including a higher and flatter outer wingtip path and a lower more deviated inner wingtip path. A quasi-steady analysis of arcing turns performed with different trajectories revealed that changes in radius were associated with asymmetrical kinematics and forces, and changes in velocity were associated with symmetrical kinematics and forces. Collectively, our results indicate that both body-dependent and -independent force orientation mechanisms are available to hummingbirds, and that these kinematic strategies are used to meet the separate aerodynamic challenges posed by changes in velocity and turning radius. © 2016 The Author(s).

  18. Mimicry by asx- and ST-turns of the four main types of β-turn in proteins

    OpenAIRE

    Duddy, William J.; Nissink, J. Willem M.; Allen, Frank H.; Milner-White, E. James

    2004-01-01

    Hydrogen-bonded β-turns in proteins occur in four categories: type I (the most common), type II, type II’, and type I’. Asx-turns resemble β-turns, in that both have an NH. . .OC hydrogen bond forming a ring of 10 atoms. Serine and threonine side chains also commonly form hydrogen-bonded turns, here called ST-turns. Asx-turns and ST-turns can be categorized into four classes, based on side chain rotamers and the conformation of the central turn residue, which are geometrically equivalent to t...

  19. Fluorescence turn on by cholate aggregates.

    Science.gov (United States)

    Baldridge, Anthony; Amador, Adrian; Tolbert, Laren M

    2011-04-05

    Bile salts, including sodium cholate (NaCh), are amphiphilic molecules with a concave hydrophilic side and a convex hydrophobic side. By forming aggregates in aqueous solution, these natural surfactants fulfill vital biological roles in the solubilization of cholesterol, lipids, and fat-soluble vitamins and thus are involved in the transport and absorption of important biological molecules. Following our success with the encapsulation of fluorescent protein chromophore (FP) analogs by synthetic hydrophobic and hydrophilic hosts, based upon substitution patterns, we now report the binding and turn on of other analogs by bile salt aggregates, observations which may lead to new tools for studying trafficking in these important systems.

  20. Turning a page of Agency history

    International Nuclear Information System (INIS)

    1969-01-01

    Recent developments, and especially the new and critical interest of developing countries, have helped to mark the turning of a page in the Agency's history. If the present situation in the economics of nuclear power does not change there is a danger that developing countries will lag further and further behind the advanced countries in its use. Shortage of resources impose a brake on Agency efforts to promote benefits of nuclear techniques, especially by technical assistance. These were some of the points made by Dr. Sigvard Eklund, the Director General, when he presented the Agency's annual report to the Economic and Social Council (ECOSOC) in July. (author)

  1. Hatchability of chicken eggs as influenced by turning frequency in ...

    African Journals Online (AJOL)

    An experiment was conducted to determine the influence of turning frequency of chicken eggs on hatchability in hurricane lantern incubator. There were four treatments in which eggs were not turned in treatment one (control), those in treatment two were turned once daily (morning), treatment three turned twice daily ...

  2. Analysis of forces in ultrasonically assisted turning

    Science.gov (United States)

    Ahmed, N.; Mitrofanov, A. V.; Babitsky, V. I.; Silberschmidt, V. V.

    2007-12-01

    Many modern engineering materials are very difficult to process with conventional machining methods. Ultrasonically assisted turning (UAT) is a new technology, where high frequency vibration (frequency f≈20 kHz, amplitude a≈15 μm) is superimposed on the movement of the cutting tool. Compared to conventional turning (CT), UAT allows significant improvements in processing many intractable materials, such as high-strength aerospace alloys and composites, by producing a noticeable decrease in cutting forces and a superior surface finish. Vibro-impact interaction between the tool and workpiece in UAT during the chip formation leads to a dynamically changing cutting force in the process zone as compared to the quasistatic one in CT. The paper presents an experimental study and computational (finite-element) model of both CT and UAT. Forces acting on the cutting tool in UAT are studied, and their dependence on vibration amplitude, frequency and vibration direction as well as on cutting parameters, such as feed rate and cutting speed, are investigated.

  3. The performance of stroke survivors in turning-while-walking while carrying out a concurrent cognitive task compared with controls.

    Directory of Open Access Journals (Sweden)

    Wing-Nga Chan

    Full Text Available Turning-while-walking is one of the commonest causes of falls in stroke survivors. It involves cognitive processing and may be challenging when performed concurrently with a cognitive task. Previous studies of dual-tasking involving turning-while-walking in stroke survivors show that the performance of physical tasks is compromised. However, the design of those studies did not address the response of stroke survivors under dual-tasking condition without specifying the task-preference and its effect on the performance of the cognitive task.First, to compare the performance of single-tasking and dual-tasking in stroke survivors. Second, to compare the performance of stroke survivors with non-stroke controls.Fifty-nine stroke survivors and 45 controls were assessed with an auditory Stroop test, a turning-while-walking test, and a combination of the two single tasks. The outcome of the cognitive task was measured by the reaction time and accuracy of the task. The physical task was evaluated by measuring the turning duration, number of steps to turn, and time to complete the turning-while-walking test.Stroke survivors showed a significantly reduced accuracy in the auditory Stroop test when dual-tasking, but there was no change in the reaction time. Their performance in the turning-while-walking task was similar under both single-tasking and dual-tasking condition. Additionally, stroke survivors demonstrated a significantly longer reaction time and lower accuracy than the controls both when single-tasking and dual-tasking. They took longer to turn, with more steps, and needed more time to complete the turning-while-walking task in both tasking conditions.The results show that stroke survivors with high mobility function performed the auditory Stroop test less accurately while preserving simultaneous turning-while-walking performance. They also demonstrated poorer performance in both single-tasking and dual-tasking as compared with controls.

  4. Childrens' left-turning preference is not modulated by magical ideation.

    Science.gov (United States)

    Streuli, Jürg C; Obrist, Gina; Brugger, Peter

    2017-01-01

    The literature on human turning preferences is inconsistent. While the few studies with children below 14 years of age uniformly describe an overall left-turning (counterclockwise) tendency, a recent Internet study with more than 1500 adults found a right-sided (clockwise) bias. We set out to investigate spontaneous turning behaviour in children age 5-3 years and, based on neuropsychiatric work in adults, also explored a potential association with magical thinking. Findings indicated a clear left-turning preference, independent of a participant's sex and handedness. Whether a child responded a question about the existence of extrasensory communication in the affirmative or not was unrelated to direction and size of turning bias and lateral preference. Our results are consistent with a left-sided turning preference reported for children, but in opposition to the clockwise bias recently described in a large-scale study with adults. Whether they point to a maturational gradient in the preferred direction of spontaneous whole-body rotation or rather to a lack of comparability between measures used in observational versus Internet-based studies remains to be further investigated. Regarding a purported association between body turns and magical thinking, our study is preliminary, as only one single question was used to probe the latter.

  5. Hard turning micro-machine tool

    Science.gov (United States)

    DeVor, Richard E; Adair, Kurt; Kapoor, Shiv G

    2013-10-22

    A micro-scale apparatus for supporting a tool for hard turning comprises a base, a pivot coupled to the base, an actuator coupled to the base, and at least one member coupled to the actuator at one end and rotatably coupled to the pivot at another end. A tool mount is disposed on the at least one member. The at least one member defines a first lever arm between the pivot and the tool mount, and a second lever arm between the pivot and the actuator. The first lever arm has a length that is less than a length of the second lever arm. The actuator moves the tool mount along an arc.

  6. Turned Back: Mad Men as Intermedial Melodrama

    Directory of Open Access Journals (Sweden)

    Monique Rooney

    2012-09-01

    Full Text Available This essay draws on definitions of gesture (Giorgio Agamben and Peter Brooks and catachresis (Peter Brooks, Jacques Derrida to examine the primacy of non-verbal signifiers as communicators of meaning in AMC’s Mad Men. Beginning with an analysis of Mad Men’s credit sequence, it draws attention to Mad Men’s use of gesture and catachresis in relation to melodrama’s privileging of non-verbal and naturalistic expression and its persistence as an intermedial mode that has moved back and forth between various media (theatre, novel, cinema, television and now digital formats. It argues that Mad Men’s melodramatic aesthetic is one that obliquely, and via a gestural and rhetorical ‘turned back’, communicates its relation to the past and the present.

  7. MEDIACRACY TURNS INTO A SYNONYM OF MEDIOCRITY?

    Directory of Open Access Journals (Sweden)

    Valentina CHIPER

    2014-11-01

    Full Text Available The link between freedom of speech and democracy is based on ideological legitimacy report. A new phenomenon which is worth noticing is the conversion of the freedom of expression from a freedom seen in certain aspects as a solitary freedom into a communication of the masses. Another challenge is prompted by the change of the traditional communication system at the dawn of technology, Internet and its various applications, as well as of the channels used. A weak point is the change in the values scale. If a journalist or a book is deemed good or valuable in terms of competence and ideas, these values are now unfortunately inspired by what we watch on TV. In this train of thoughts, reliable opinion leaders are no longer the same. Mediacracy turns into a synonym of mediocrity with affectivity and emotion prevailing over reason and instead of the communication of thoughts and opinions.

  8. Autism genes keep turning up chromatin.

    Science.gov (United States)

    Lasalle, Janine M

    2013-06-19

    Autism-spectrum disorders (ASD) are complex genetic disorders collectively characterized by impaired social interactions and language as well as repetitive and restrictive behaviors. Of the hundreds of genes implicated in ASD, those encoding proteins acting at neuronal synapses have been most characterized by candidate gene studies. However, recent unbiased genome-wide analyses have turned up a multitude of novel candidate genes encoding nuclear factors implicated in chromatin remodeling, histone demethylation, histone variants, and the recognition of DNA methylation. Furthermore, the chromatin landscape of the human genome has been shown to influence the location of de novo mutations observed in ASD as well as the landscape of DNA methylation underlying neurodevelopmental and synaptic processes. Understanding the interactions of nuclear chromatin proteins and DNA with signal transduction pathways and environmental influences in the developing brain will be critical to understanding the relevance of these ASD candidate genes and continued uncovering of the "roots" of autism etiology.

  9. Introduction: The Participatory Turn in Urbanism

    Directory of Open Access Journals (Sweden)

    Maroš Krivý

    2014-08-01

    Full Text Available This issue of Footprint examines the recent participatory turn in urban planning and urban design. It discusses the co-opting of participatory processes by planning departments, the systematic disregard of inequalities, and the empowering of the market resulting from the ‘anti-statism’ present in many participatory schemes.What is the relationship between the institutionalisation of participation and the practices of autonomy, self-organisation, and inclusion? When and how does genuine empowerment of collectives take place? Does the demand for the empowerment of local organisations and communities strengthen the market forces at the expense of central government?This issue attempts to problematise ‘participation’, to call attentions to some of its shortcomings, deficits, and limitations, not in order to necessarily bypass the demand for the democratisation of the urban, but in order to rectify and strengthen it.

  10. The experience turn as ‘bandwagon’

    DEFF Research Database (Denmark)

    Fuglsang, Lars; Eide, Dorthe

    2013-01-01

    further central processes, namely appropriation and narrowing the workspace. One Norwegian and one Danish network are studied using a case methodology. They are two rural networks of mainly small tourism firms. The empirical study confirms and illustrates how the bandwagon effect involves these three core......This paper uses the bandwagon metaphor to analyse, in two rural contexts, how small tourism firms become engaged in the idea of the experience economy and how the idea is turned into practice through network formation and innovation. In developing a practice-based approach we use the bandwagon...... metaphor to conceptualize network formation and innovation in terms of a ‘journey’. Following the practice-based literature on bandwagons, the journey starts by labelling an idea that is broad enough to give meaning to, and pull together, a number of diverse supporters. The journey also depends on two...

  11. Turning Video Resource Management into Cloud Computing

    Directory of Open Access Journals (Sweden)

    Weili Kou

    2016-07-01

    Full Text Available Big data makes cloud computing more and more popular in various fields. Video resources are very useful and important to education, security monitoring, and so on. However, issues of their huge volumes, complex data types, inefficient processing performance, weak security, and long times for loading pose challenges in video resource management. The Hadoop Distributed File System (HDFS is an open-source framework, which can provide cloud-based platforms and presents an opportunity for solving these problems. This paper presents video resource management architecture based on HDFS to provide a uniform framework and a five-layer model for standardizing the current various algorithms and applications. The architecture, basic model, and key algorithms are designed for turning video resources into a cloud computing environment. The design was tested by establishing a simulation system prototype.

  12. Reshape of the bunch-by-bunch BPM signal to turn-by-turn matrix during the fast rf frequency sweeping time in Booster

    International Nuclear Information System (INIS)

    Yang, Xi; Ankenbrandt, Charles M.; Lackey, James; Scarpine, Vic

    2004-01-01

    The bunch-by-bunch BPM signal array has to be reshaped into a turn-by-turn (TBT) matrix in order to make the TBT beam position information of a single bunch available for further data analysis, such as via the Fourier transform to obtain the synchrotron tune and betatron tune, etc. Since the RF frequency sweeps more than 10 MHz in the first 8 ms of a Booster cycle, the revolution time decreases more than 20%. The number of data points for each Booster turn (BT) should be varied in the same pace with the revolution time since the sampling rate of a digital oscilloscope is usually fixed. And this can be done by pre-determining the relationship between the RF frequency and the time in a cycle via the curve fit

  13. Turning to Ontology in STS? Turning to STS through ‘Ontology’

    NARCIS (Netherlands)

    van Heur, B.; Leydesdorff, L.; Wyatt, S.

    2012-01-01

    We examine the evidence for the claim of an ‘ontological turn’ in science and technology studies (STS). Despite an increase in references to ‘ontology’ in STS since 1989, we show that there has not so much been an ontological turn as multiple discussions deploying the language of ontology,

  14. A time-motion analysis of turns performed by highly ranked viennese waltz dancers.

    Science.gov (United States)

    Prosen, Jerneja; James, Nic; Dimitriou, Lygeri; Perš, Janez; Vučković, Goran

    2013-01-01

    Twenty-four dance couples performing at the 2011 IDSF (International DanceSport Federation) International Slovenia Open were divided into two groups: the first twelve placed couples (top ranked) and the last twelve placed couples (lower ranked). Video recordings were processed automatically using computer vision tracking algorithms under operator supervision to calculate movement parameters. Time and speed of movement were analysed during single natural (right) and reverse (left) turns performed during the Viennese waltz. Both top and lower ranked dancers tended to perform similar proportionate frequencies of reverse (≈ 35%) and natural (≈ 65%) turns. Analysis of reverse turns showed that the top ranked dancers performed less turns on a curved trajectory (16%) than the lower ranked dancers (33%). The top ranked couples performed all turns at similar speeds (F = 1.31, df = 3, p = 0.27; mean = 2.09m/s) all of which were significantly quicker than the lower ranked couples (mean = 1.94m/s), the greatest differences found for reverse turns (12.43% faster for curved trajectories, 8.42% for straight trajectories). This suggests that the ability to maintain a high speed in the more difficult turns, particularly the reverse turns on a curved trajectory, results in the overall dance appearing more fluent as the speed of movement does not fluctuate as much. This aspect of performance needs to be improved by lower ranked dancers if they wish to improve rating of their performance. Future research should determine which factors relate to the speed of turns.

  15. Europe joins the race to turn the Internet into one vast computer

    CERN Multimedia

    Butler, D

    2000-01-01

    CERN is coordinating an European proposal to design internet and software protocols to turn the internet into a single gigantic computer - a 'grid'. The impetus has come from the challenges surrounding the analysis of the vast amounts of data which will be generated by the LHC (1 page).

  16. Mimicry by asx- and ST-turns of the four main types of beta-turn in proteins.

    Science.gov (United States)

    Duddy, William J; Nissink, J Willem M; Allen, Frank H; Milner-White, E James

    2004-11-01

    Hydrogen-bonded beta-turns in proteins occur in four categories: type I (the most common), type II, type II', and type I'. Asx-turns resemble beta-turns, in that both have an NH. . .OC hydrogen bond forming a ring of 10 atoms. Serine and threonine side chains also commonly form hydrogen-bonded turns, here called ST-turns. Asx-turns and ST-turns can be categorized into four classes, based on side chain rotamers and the conformation of the central turn residue, which are geometrically equivalent to the four types of beta-turns. We propose asx- and ST-turns be named using the type I, II, I', and II' beta-turn nomenclature. Using this, the frequency of occurrence of both asx- and ST-turns is: type II' > type I > type II > type I', whereas for beta-turns it is type I > type II > type I' > type II'. Almost all type II asx-turns occur as a recently described three residue feature named an asx-nest.

  17. Mimicry by asx- and ST-turns of the four main types of β-turn in proteins

    Science.gov (United States)

    Duddy, William J.; Nissink, J. Willem M.; Allen, Frank H.; Milner-White, E. James

    2004-01-01

    Hydrogen-bonded β-turns in proteins occur in four categories: type I (the most common), type II, type II’, and type I’. Asx-turns resemble β-turns, in that both have an NH. . .OC hydrogen bond forming a ring of 10 atoms. Serine and threonine side chains also commonly form hydrogen-bonded turns, here called ST-turns. Asx-turns and ST-turns can be categorized into four classes, based on side chain rotamers and the conformation of the central turn residue, which are geometrically equivalent to the four types of β-turns. We propose asx- and ST-turns be named using the type I, II, I’, and II’ β-turn nomenclature. Using this, the frequency of occurrence of both asx- and ST-turns is: type II’ > type I > type II > type I’, whereas for β-turns it is type I > type II > type I’ > type II’. Almost all type II asx-turns occur as a recently described three residue feature named an asx-nest. PMID:15459339

  18. Predicting turns in proteins with a unified model.

    Directory of Open Access Journals (Sweden)

    Qi Song

    Full Text Available MOTIVATION: Turns are a critical element of the structure of a protein; turns play a crucial role in loops, folds, and interactions. Current prediction methods are well developed for the prediction of individual turn types, including α-turn, β-turn, and γ-turn, etc. However, for further protein structure and function prediction it is necessary to develop a uniform model that can accurately predict all types of turns simultaneously. RESULTS: In this study, we present a novel approach, TurnP, which offers the ability to investigate all the turns in a protein based on a unified model. The main characteristics of TurnP are: (i using newly exploited features of structural evolution information (secondary structure and shape string of protein based on structure homologies, (ii considering all types of turns in a unified model, and (iii practical capability of accurate prediction of all turns simultaneously for a query. TurnP utilizes predicted secondary structures and predicted shape strings, both of which have greater accuracy, based on innovative technologies which were both developed by our group. Then, sequence and structural evolution features, which are profile of sequence, profile of secondary structures and profile of shape strings are generated by sequence and structure alignment. When TurnP was validated on a non-redundant dataset (4,107 entries by five-fold cross-validation, we achieved an accuracy of 88.8% and a sensitivity of 71.8%, which exceeded the most state-of-the-art predictors of certain type of turn. Newly determined sequences, the EVA and CASP9 datasets were used as independent tests and the results we achieved were outstanding for turn predictions and confirmed the good performance of TurnP for practical applications.

  19. THE NEOLIBERAL TURN IN AMERICAN HEALTH CARE.

    Science.gov (United States)

    Gaffney, Adam

    2015-01-01

    Leaving millions both uninsured and underinsured, the Affordable Care Act does not create a system of universal health care in the United States. To understand its shortcomings, we have to understand it as part of a historic shift in the political economy of American health care. This "neoliberal turn" began as a reaction against the welfare state as it expanded during the New Deal and post-World War II period. What began as a movement associated with philosophers like Friedrich Hayek ultimately had a powerful impact via the attraction of powerful corporate sponsors and political supporters, and it was to historically transform American health care thought and organization. In health policy circles, for example, it can be seen in a rising emphasis on "moral hazard," overuse, and cost sharing above a concern with universalism and equity. It was likewise manifested by the corporatization of the health maintenance organization and the rise of the "consumer-driven" health care movement. By the time of the health care reform debate, the influence of corporate "stakeholders" was to prove predominant. These developments, however, must be construed as connected parts of a much larger political transformation, reflected in rising inequality and privatization, occurring both domestically and internationally.

  20. Cosmopolitan Pluralism: Beyond the Cultural Turn

    Directory of Open Access Journals (Sweden)

    Stephanie Lawson

    2011-11-01

    Full Text Available The ‘cultural turn’ has had a profound influence across the humanities and social sciences in the last few decades. In calling into question the universalist basis on which conventional methodological and normative assumptions have been based, the cultural turn has focused on the extent to which specificity and particularity underpin what we can know, how we can know it, and how this affects our being-in-the world. This has opened the way to a range of insights, from issues of pluralism and difference, both within political communities and between them, to the instability if not impossibility of foundations for knowledge. Too few studies embracing this ‘cultural turn’, however, pay more than cursory attention to the culture concept itself. This article suggests that conceptions of culture derived mainly from the discipline of anthropology dominate in political studies, including international relations, while humanist conceptions have been largely ignored or rejected. It argues further that we would do well to reconsider what humanist ideas can contribute to how ‘culture’ is both conceptualized and deployed in political thought and action, especially in countering the overparticularization of social and political phenomena that marks contemporary culturalist approaches.

  1. Now, It's Your Turn: How You Can Take Medicine Safely

    Science.gov (United States)

    ... please turn Javascript on. Feature: Taking Medicines Safely Now, It's Your Turn: How You Can Take Medicine ... a medicine. The pharmacist has filled the prescription. Now it's up to you to take the medicine ...

  2. 14 CFR 417.209 - Malfunction turn analysis.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Malfunction turn analysis. 417.209 Section...'s turning capability using a set of turn curves. The analysis must account for: (1) All trajectory... the thrusting phases of flight. The analysis must account for trajectory time intervals between...

  3. History of Education in Canada: Historiographic "Turns" and Widening Horizons

    Science.gov (United States)

    Bruno-Jofré, Rosa

    2014-01-01

    This paper explores major historiographic "turns" in history of education with a focus, although not exclusively, on English-speaking Canada. It addresses the transformative intellectual impact of the turn toward social history on the history of education, the impact of cultural history and the linguistic turn, the reception of Michel…

  4. Turn Openings in Academic Talk: Where Goals and Roles Intersect

    Science.gov (United States)

    Evison, Jane

    2013-01-01

    This study uses Corpus Linguistic (CL) techniques to explore multiple turn openings in conjunction with comparative measures of turn-initial priming (the proportion of occurrences of a form that are turn-initial). Using a benchmark corpus of casual conversation as a point of comparison, six frequent items which have a particularly strong affinity…

  5. First turn simulations in the cooler synchrotron COSY

    International Nuclear Information System (INIS)

    Dinev, D.

    1991-07-01

    This paper is devoted to the first turn correction and related problems in particle accelerators of synchrotron type. The paper consists of two parts. The first part is a survey of the existing methods for first turn steering. The second part is entirely devoted to the first turn in the cooler synchrotron COSY which is under assembling in KFA-Julich, Germany. (orig.)

  6. Turn-Based War Chess Model and Its Search Algorithm per Turn

    Directory of Open Access Journals (Sweden)

    Hai Nan

    2016-01-01

    Full Text Available War chess gaming has so far received insufficient attention but is a significant component of turn-based strategy games (TBS and is studied in this paper. First, a common game model is proposed through various existing war chess types. Based on the model, we propose a theory frame involving combinational optimization on the one hand and game tree search on the other hand. We also discuss a key problem, namely, that the number of the branching factors of each turn in the game tree is huge. Then, we propose two algorithms for searching in one turn to solve the problem: (1 enumeration by order; (2 enumeration by recursion. The main difference between these two is the permutation method used: the former uses the dictionary sequence method, while the latter uses the recursive permutation method. Finally, we prove that both of these algorithms are optimal, and we analyze the difference between their efficiencies. An important factor is the total time taken for the unit to expand until it achieves its reachable position. The factor, which is the total number of expansions that each unit makes in its reachable position, is set. The conclusion proposed is in terms of this factor: Enumeration by recursion is better than enumeration by order in all situations.

  7. A highly efficient type I β-turn mimetic simulating an Asx-Pro-turn-like structure.

    Science.gov (United States)

    Pinsker, Andrea; Einsiedel, Jürgen; Härterich, Steffen; Waibel, Reiner; Gmeiner, Peter

    2011-07-01

    Asx-Pro-turns have been identified with high frequency in protein structures nucleating type I β-turns. By bridging the amino acid side chain in position i with a nitrogen substituent in position i+2 by ring-closing olefin metathesis (RCM), peptide mimetics of type 1 could be developed. NMR based conformational investigations indicated a stable intramolecular H-bond constraining a U-turn conformation that was predicted to simulate a type I β-turn.

  8. Can helical spring dextrin be composed of higher eight glucose units per turn?

    Science.gov (United States)

    Xu, Jin; Zhao, Wenxiu; Ning, Yawei; Bashari, Mohanad; Jin, Zhengyu; Xu, Baocai; Zhang, Lixia; Duan, Xiang; Chen, Haiying; Wu, Fengfeng; Xu, Xueming

    2013-03-01

    In this study, spring dextrin (SD) has been noncovalently wrapped onto single-wall carbon nanotubes (SWNTs) to explain the number of glucose residues per turn larger than eight. Differential scanning calorimetry (DSC), FR-IR and Raman spectroscopy demonstrated that SD formed supramolecular complex with SWNTs. Furthermore, Atomic force microscope (AFM) micrograph indicated that SD wrap around SWNTs into helical superstructures. Finally, molecular dynamic simulation suggested that the space of helix cavity changed with different diameter of SWNTs, and SD wrapped around SWNTs (1 nm, 1.5 nm and 2 nm) were 11, 14 and 17 glucose units per turn, respectively.

  9. and γγ-turns in proteins revisited: A new set of amino acid turn-type de

    Indian Academy of Sciences (India)

    mine, valine, glutamic acid and alanine has decreased for β-turns. Certain new amino acid preferences were observed for both turn types and individual amino acids showed turn-type dependent positional preferences. The rationale for new amino acid preferences are discussed in the light of hydrogen bonds and other.

  10. and γγ-turns in proteins revisited: A new set of amino acid turn-type de

    Indian Academy of Sciences (India)

    cent Protein Data Bank has nearly doubled and the number of γ-turns in a representative set of 320 proteins has in- creased over seven times since the previous analysis. β-turns (7153) and γ-turns (911) extracted from these proteins were used to derive a revised set of type-dependent amino acid positional preferences and ...

  11. China's nuclear industry at a turning point

    International Nuclear Information System (INIS)

    Kubota, Hideo

    2009-01-01

    The China nuclear industry is coming at a turning point since the first Chinese nuclear power plant of Qinshan No.1 was started construction 24 years ago. At the end of year 2008, there are 11 nuclear power plants in operation in China. The total power capacity of the facilities has reached to 9068MW. It resulted in 11th position next to Sweden. Despite the nuclear power was reached to 68.4 billion KWh, it makes up only 2% of the total electric generation in China. The thermal power takes 81% of the total generation, in which the power by coal fuel takes for the most part and the total generation by both natural gas and oil fuel take only as small as a few percentage. In this situation, a nuclear power plant development is being accelerated. As of July 2009, China has 15 nuclear power plants currently under construction with a total capacity of 15260MW, that is more than 24000MW together with ones currently in operation. Furthermore, my research shows that China would have a plan to build 180 new nuclear power plants of 192770MW, though the progress varies widely. The construction speed of China nuclear power plant has become increasingly high since 2008. Starting with the construction of. Ningde unit 1 (PWR, 1110MW) in Fujian Province, February 2008, they continuously started constructions for five more nuclear power plants in year 2008 alone. China still holds momentum in a nuclear power plant construction even in 2009, and continues constructing new nuclear power plants. They include a Liaoning. Hongyanhe unit 3 in March, Sanmen Zhejiang April 19 which lead a construction first in the world for the third generation nuclear power plant of AP1000 (PWR, 1250MW) developed by Westinghouse, Fuqing unit 2 (PWR, 1000MW) June 17, and Fangjiashan unit 2 (PWR, 1000MW) on 17, July. Besides, Shidaowan, Rongcheng phase I (200MW), which is a demonstration reactor of HTGR in Shandong. They even said that China would start construction for approximately 7 to 9 nuclear power

  12. Mapping the Glocal Turn: Literature Streams, Scholarship Clusters and Debates

    Directory of Open Access Journals (Sweden)

    Victor Roudometof

    2015-12-01

    accidental that the glocal has been invoked in the context of discussions about the “participatory web” or “Web 2.0” (Boyd 2005. It is obviously impossible to address all the twists and turns within the multitude of fields that have employed the terms glocal and glocalization in the course of a single discussion. Inevitably, a full treatment is reserved for a lengthier and more in-depth discussion elsewhere (Roudometof Forthcoming. In the following, then, I restrict myself to an overview of the employment of the glocal. Although I briefly touch on the employment of glocalization in business, I nonetheless concentrate on the humanities and social sciences. The goal is to present an overview of the various bodies of literature, to identify and discuss clusters of scholarship where glocalization is among the important research foci and to offer a brief overview of emerging debates within this nascent field of study. As I have stated elsewhere (Roudometof 2015 the glocal is a new word whose origins most likely lie somewhere in the early 1990s. It stands in sharp contrast to the global, the appearance of which dates back to the late 19th or early 20th centuries. The emergence of the glocal in scholarly discourse is a feature of the post-1989 era, and its rise has been ubiquitous after the turn of the millennium.

  13. Turn me on! Using the “Internet of Things” to turn things on and off

    CSIR Research Space (South Africa)

    Butgereit, L

    2011-10-01

    Full Text Available -directional. The thing in question is automatically posting data to a location on the Internet for people to read. Bi-directional communication between people and things via the Internet is less common. This paper describes a project TurnMeOn where people... traversed numerous times in this project leading to a final conclusion step. 4 General Architecture There are three major components of the platform: ThingMemory, Beachcomber, and UrbanControl. ThingMemory supplies the web interface and a...

  14. Full-turn symplectic map from a generator in a Fourier-spline basis

    International Nuclear Information System (INIS)

    Berg, J.S.; Warnock, R.L.; Ruth, R.D.; Forest, E.

    1993-04-01

    Given an arbitrary symplectic tracking code, one can construct a full-turn symplectic map that approximates the result of the code to high accuracy. The map is defined implicitly by a mixed-variable generating function. The implicit definition is no great drawback in practice, thanks to an efficient use of Newton's method to solve for the explicit map at each iteration. The generator is represented by a Fourier series in angle variables, with coefficients given as B-spline functions of action variables. It is constructed by using results of single-turn tracking from many initial conditions. The method has been appliedto a realistic model of the SSC in three degrees of freedom. Orbits can be mapped symplectically for 10 7 turns on an IBM RS6000 model 320 workstation, in a run of about one day

  15. Diamond-turning HP-21 beryllium to achieve an optical surface

    International Nuclear Information System (INIS)

    Allen, D.K.; Hauschildt, H.W.; Bryan, J.B.

    1975-01-01

    Investigation of diamond turning on beryllium was made in anticipation of obtaining an optical finish. Although results of past experiences were poor, it was decided to continue diamond turning on beryllium beyond initial failures. By changing speed and using coolant, partial success was achieved. Tool wear was the major problem. Tests were made to establish and plot wear as a function of cutting speed and time. Slower speeds did cause lower wear rates, but at no time did wear reach an acceptable level. The machine, tools, and procedure used were chosen based on the results of preliminary attempts and on previous experience. It was unnecessary to use an air-bearing spindle because tool failure governed the best finish that could be expected. All tools of diamond composition, whether single crystal or polycrystalline, wore at unacceptable rates. Based on present technology, it must be concluded that beryllium cannot be feasibly diamond turned to achieve an optical finish. (22 fig.)

  16. Characterization of beta-turn and Asx-turns mimicry in a model peptide: stabilization via C--H . . . O interaction.

    Science.gov (United States)

    Thakur, A K; Kishore, R

    2006-04-15

    The chemical synthesis and single-crystal X-ray diffraction analysis of a model peptide, Boc-Thr-Thr-NH2 (1) comprised of proteinogenic residues bearing an amphiphilic Cbeta -stereogenic center, has been described. Interestingly, the analysis of its molecular structure revealed the existence of a distinct conformation that mimics a typical beta-turn and Asx-turns, i.e., the two Thr residues occupy the left- and right-corner positions. The main-chain torsion angles of the N- and C-terminal residues i.e., semiextended: phi = -68.9 degrees , psi = 128.6 degrees ; semifolded: phi = -138.1 degrees , psi = 2.5 degrees conformations, respectively, in conjunction with a gauche- disposition of the obligatory C-terminus Thr CgammaH3 group, characterize the occurrence of the newly described beta-turn- and Asx-turns-like topology. The preferred molecular structure is suggested to be stabilized by an effective nonconventional main-chain to side-chain Ci=O . . . H--Cgamma(i+2)-type intraturn hydrogen bond. Noteworthy, the observed topology of the resulting 10-membered hydrogen-bonded ring is essentially similar to the one perceived for a classical beta-turn and the Asx-turns, stabilized by a conventional intraturn hydrogen bond. Considering the signs as well as magnitudes of the backbone torsion angles and the orientation of the central peptide bond, the overall mimicked topology resembles the type II beta-turn or type II Asx-turns. An analysis of Xaa-Thr sequences in high-resolution X-ray elucidated protein structures revealed the novel topology prevalence in functional proteins (unpublished). In view of indubitable structural as well as functional importance of nonconventional interactions in bioorganic and biomacromolecules, we intend to highlight the participation of Thr CgammaH in the creation of a short-range C=O . . . H--Cgamma -type interaction in peptides and proteins. Copyright 2006 Wiley Periodicals, Inc.

  17. Spatiotemporal and Kinematic Parameters Relating to Oriented Gait and Turn Performance in Patients with Chronic Stroke.

    Directory of Open Access Journals (Sweden)

    Céline Bonnyaud

    Full Text Available The timed up and go test (TUG is a functional test which is increasingly used to evaluate patients with stroke. The outcome measured is usually global TUG performance-time. Assessment of spatiotemporal and kinematic parameters during the Oriented gait and Turn sub-tasks of the TUG would provide a better understanding of the mechanisms underlying patients' performance and therefore may help to guide rehabilitation. The aim of this study was thus to determine the spatiotemporal and kinematic parameters which were most related to the walking and turning sub-tasks of TUG performance in stroke patients.29 stroke patients carried out the TUG test which was recorded using an optoelectronic system in two conditions: spontaneous and standardized condition (standardized foot position and instructed to turn towards the paretic side. They also underwent a clinical assessment. Stepwise regression was used to determine the parameters most related to Oriented gait and Turn sub-tasks. Relationships between explanatory parameters of Oriented gait and Turn performance and clinical scales were evaluated using Spearman correlations.Step length and cadence explained 82% to 95% of the variance for the walking sub-tasks in both conditions. Percentage single support phase and contralateral swing phase (depending on the condition respectively explained 27% and 56% of the variance during the turning sub-task in the spontaneous and standardized conditions.Step length, cadence, percentage of paretic single support phase and non-paretic swing phase, as well as dynamic stability were the main parameters related to TUG performance and they should be targeted in rehabilitation.

  18. AE Monitoring of Diamond Turned Rapidly Soldified Aluminium 443

    International Nuclear Information System (INIS)

    Onwuka, G; Abou-El-Hossein, K; Mkoko, Z

    2017-01-01

    The fast replacement of conventional aluminium with rapidly solidified aluminium alloys has become a noticeable trend in the current manufacturing industries involved in the production of optics and optical molding inserts. This is as a result of the improved performance and durability of rapidly solidified aluminium alloys when compared to conventional aluminium. Melt spinning process is vital for manufacturing rapidly solidified aluminium alloys like RSA 905, RSA 6061 and RSA 443 which are common in the industries today. RSA 443 is a newly developed alloy with few research findings and huge research potential. There is no available literature focused on monitoring the machining of RSA 443 alloys. In this research, Acoustic Emission sensing technique was applied to monitor the single point diamond turning of RSA 443 on an ultrahigh precision lathe machine. The machining process was carried out after careful selection of feed, speed and depths of cut. The monitoring process was achieved with a high sampling data acquisition system using different tools while concurrent measurement of the surface roughness and tool wear were initiated after covering a total feed distance of 13km. An increasing trend of raw AE spikes and peak to peak signal were observed with an increase in the surface roughness and tool wear values. Hence, acoustic emission sensing technique proves to be an effective monitoring method for the machining of RSA 443 alloy. (paper)

  19. CERN's Community "Log Book" turns 50

    CERN Document Server

    Katarina Anthony

    2015-01-01

    For five decades, the CERN Bulletin has been a staple of the Organization. As CERN has grown as a laboratory and a community, the Bulletin has been there to cover each development as it happens. In honour of the publication's 50th anniversary, we're taking a trip through CERN’s history via the headings and hidden corners of its internal newsletter.     It's 1965 and CERN - now 11 years old - has matured from a simple lab to a fledgling community. While news could once spread in a single afternoon, CERN's growth necessitated a new approach to the sharing of internal information. Meanwhile, the CERN Courier - the only publication in town - was approaching a more global physics audience – an audience for whom CERN road closures were not breaking news. And so, in March 1965, the Weekly Bulletin was born. What was meant as a simple newsletter of events and internal announcements quickly developed into a wider source of news about CERN....

  20. Mechanisms for turn alternation in four invertebrate species.

    Science.gov (United States)

    Hughes, R N

    1987-02-01

    Free-choice behavior following one or more forced turns was observed in representatives of four invertebrate classes (earthworms, woodlice, millipedes, earwigs). While all animals alternated, species differences occurred in free turn angle and the effects of varied angle and number of forced turns. Overall, woodlice and millipedes turned at sharper angles and responded more to the forced turn conditions than earthworms and earwigs. From behavior observed following three forced turns in one direction and then one in the opposite, it was concluded that, in earlier experiments, earthworms alternated via tactile cues, woodlice mainly used kinesthetic but could also use tactile cues, millipedes mainly used tactile but could also use kinesthetic cues and earwigs may have relied on kinesthetic cues alone. Since phyletic differences did not seem appropriate, the results were discussed in terms of other characteristics such as body shape and life style. Copyright © 1987. Published by Elsevier B.V.

  1. Laterality of the lower limbs and carving turns

    Directory of Open Access Journals (Sweden)

    F Vaverka

    2010-06-01

    Full Text Available The aim of this study is to discover whether the lateral preference of the lower limbs influences the execution of successive carving turns or not. Six skilled skiers (men, right lower limb preference, age 26.5±1.61 years old, height 1.80±0.04 m, body weight 78.83±5.46 kg executed 30 (18 left, 12 right symmetrical carving turns. Kinetic analysis of the final vertical component of reaction force FZ(t measured dynamometrically provided the information about the time of initiation and steering phases of the turn and the maximum force, average force and force impulse. Differences between right and left turns are not statistically significant. Factual analyses of the magnitude of measured variables confirmed that left turns were found to have a longer duration, a shorter initiation and longer steering phase, and higher level of produced force and force impulse in comparison with right turns. Based on the results it can be concluded that the turns where the outer leg is the preferred limb are preferentially used to regulate the speed of the ride. The study of laterality in symmetrical carving turns has proven that lateral preference of lower extremities influences the execution of the turn also by expert skiers.

  2. Fusion welded fabrication of unshielded steel glove boxes

    International Nuclear Information System (INIS)

    1981-04-01

    This Specification deals with the manufacture, testing, inspection and delivery of fabricated glove boxes, including such internal and/or external fittings as are shown on the relevant drawings. (author)

  3. DESIGN AND INITIAL RESULTS OF A TURN-BY-TURN BEAM POSITION MONITORING SYSTEM FOR MULTIPLE BUNCH OPERATION OF THE ATF DAMPING RING

    CERN Document Server

    Christian, G B; Bett, D R; Burrows, P N; Davis, M R; Gerbershagen, A; Perry, C; Constance, B; Resta-Lopez, J

    2011-01-01

    An FPGA-based monitoring system has been developed to study multi-bunch beam instabilities in the damping ring (DR) of the KEK Accelerator Test Facility (ATF), utilising a stripline beam position monitor (BPM) and existing BPM processor hardware. The system is designed to record the horizontal and/or vertical positions of up to three bunches in the DR in single-bunch multi-train mode or the head bunch of up to three trains in multi-bunch mode, with a bunch spacing of 5.6 ns. The FPGA firmware and data acquisition software were modified to record turn-by-turn data for up to six channels and 1–3 bunches in the DR. An overview of the system and initial results will be presented.

  4. CONNECTION OF TURN AHEAD AND TURN BACK WITH MOTORIC ABILITIES OF THE FOURTH GRADE OF HIGH SCHOOL

    Directory of Open Access Journals (Sweden)

    Jovica Petković

    2008-08-01

    Full Text Available The research is done for the purpose of determination and defining of the level of connection between some motoric abilities with success in realization of programmed contents from the area of gymnastics (turn ahead and turn back. The research is done on the sample of fifty students from the fourth grade of High School, on ten motoric tests and on two specific motoric assignments – turn ahead and turn back. The results of this research clearly point that there exist the multitude of statistically important coefficients of correlation between treated motoric abilities and applied motoric assignments.

  5. Costs of switching auditory spatial attention in following conversational turn-taking

    OpenAIRE

    Lin, Gaven; Carlile, Simon

    2015-01-01

    Following a multi-talker conversation relies on the ability to rapidly and efficiently shift the focus of spatial attention from one talker to another. The current study investigated the listening costs associated with shifts in spatial attention during conversational turn-taking in 16 normally-hearing listeners using a novel sentence recall task. Three pairs of syntactically fixed but semantically unpredictable matrix sentences, recorded from a single male talker, were presented concurrently...

  6. Density of Plutonium Turnings Generated from Machining Activities

    Energy Technology Data Exchange (ETDEWEB)

    Gonzales, John Robert [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Vigil, Duane M. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Jachimowski, Thomas A. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Archuleta, Alonso [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Arellano, Gerald Joseph [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Melton, Vince Lee [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-10-20

    The purpose of this project was to determine the density of plutonium (Pu) turnings generated from the range of machining activities, using both surrogate material and machined Pu turnings. Verify that 500 grams (g) of plutonium will fit in a one quart container using a surrogate equivalent volume and that 100 grams of Pu will fit in a one quart Savy container.

  7. Cutting forces during turning with variable depth of cut

    Directory of Open Access Journals (Sweden)

    M. Sadílek

    2016-03-01

    The proposed research for the paper is an experimental work – measuring cutting forces and monitoring of the tool wear on the cutting edge. It compares the turning where standard roughing cycle is used and the turning where the proposed roughing cycle with variable depth of cut is applied.

  8. Quasi-Automatic Monitoring System For Turning Operation Using ...

    African Journals Online (AJOL)

    This work discusses the generation of a quasi monitoring system intended for an operator to change cutting tool during turning operation. The monitoring system uses the effects of turning va riables on acoustic emission signal responses and factorial experimental design approach. In cutting operations, acoustic emission ...

  9. Turn-Continuation by Self and by Other

    Science.gov (United States)

    Sidnell, Jack

    2012-01-01

    At the possible completion of a turn constructional unit (TCU) that has not selected a next speaker, a speaker has two available options: either begin a new TCU or continue the one that has just come to a point of possible completion. This article describes some of the complex turns that result from exercising the second option. These can be seen…

  10. Fast Turn-off Mine Transient Electromagnetic Transmitter System

    Directory of Open Access Journals (Sweden)

    ZHENG Xiao-Liang

    2014-05-01

    Full Text Available For solving problems such as short turn-off time, high linear degree of falling edge, measurement of turn-off time and influence of primary signals for transient electromagnetic transmitter, and restrictions because of the environmental conditions of underground coal mine, this thesis aims at designing a new transient electromagnetic transmitter system suitable for coal mine. Supported by damping absorption circuit, such system applies small volume, sectional transmitting coil, with features of short turn-off time, high linear degree of current falling edge. It uses the transmitter monitoring circuit, which accurately measures turn-off time and simultaneously records the current value changes after turn-off, thus to eliminate the influence of primary field as well as to restore earlier secondary field signals for reference and finally to improve the ability to detect the shallow structure. It turns out that the new system has a shorter turn-off time, a higher linear degree of current falling and more accurate data record of turn-off current.

  11. Wittgenstein and the linguistic turn in social theory

    DEFF Research Database (Denmark)

    Hermansen, Jens Christian

    of Winch in social theory, the wider and more recent influence of Wittgenstein in areas such as technology and science studies, social theory, feminist and gender studies and conversation and discourse analysis is also considered. Historically, the readings of Wittgenstein in the social sciences have taken...... the implications of Wittgenstein's philosophy to involve three general theses (what I shall call the three theses of the linguistic turn). According to these (a) social life is organised in and through language (the linguistic thesis), (b) language is a practical activity, a language-in-use (the practical thesis...... of the linguistic turn in social theory, the linguistic turn is a double-edged sword of both profound insights and limits; the claim is that the limits of the linguistic turn are the strengths of functionalist, structuralist and materialist approaches to the social sciences. The approach of the critical turn...

  12. A general design for coherent transponders with multiple turn-around ratios

    Science.gov (United States)

    Li, Minzhu; Yang, Zhen; Ye, Lei; Zhou, Rong; Guo, Kenping

    2017-10-01

    A general design is proposed to meet the miniaturization requirement for coherent transponders with multiple turn-around ratios. The transponder can be realized with a single LO and a single frequency conversion for both directions, by unifying different LOs, sharing TR channels, and expanding the processing bandwidth of digital circuits, which accords with the idea of software defined radio(SDR) and replace the traditional LOs in intermediate frequency(IF) for frequency up or down conversion. This design is convenient for chip integration and channel expanding, and can be utilized as a general platform for similar transceivers.

  13. Sharp Turning and Corner Turning: Comparison of Energy Expenditure, Gait Parameters, and Level of Fatigue among Community-Dwelling Elderly

    Directory of Open Access Journals (Sweden)

    Maria Justine

    2014-01-01

    Full Text Available This study compares energy expenditure (EE, gait parameters (GP, and level of fatigue (LOF between 5-minute walking with sharp turning (ST and corner turning (CT. Data were obtained from 29 community-dwelling elderly (mean age, 62.7 ± 3.54 years. For 5 minutes, in ST task, participants walked on a 3-meter pathway with 2 cones placed at each end (180° turning, while in CT task, participants walked on a 6-meter pathway with 4 cones placed at 4 corners (90° turning. The physiological cost index, pedometer, and 10-point Modified Borg Dyspnoea Scale were used to measure EE (beats/min, GP (no of steps, and LOF, respectively. Data were analyzed by using independent t-tests. EE during ST (0.62 ± 0.21 beats/min was significantly higher than CT (0.48 ± 0.17 beats/min (P0.05. Higher EE in ST could be due to the difficulty in changing to a 180° direction, which may involve agility and different turning strategies (step-turn or pivot-turn to adjust the posture carefully. In CT, participants could choose a step-turn strategy to change to a 90° direction, which was less challenging to postural control.

  14. Observation of diamond turned OFHC copper using Scanning Tunneling Microscopy

    Energy Technology Data Exchange (ETDEWEB)

    Grigg, D.A.; Russell, P.E.; Dow, T.A.

    1988-12-01

    Diamond turned OFHC copper samples have been observed within the past few months using the Scanning Tunneling Microscope. Initial results have shown evidence of artifacts which may be used to better understand the diamond turning process. The STM`s high resolution capability and three dimensional data representation allows observation and study of surface features unobtainable with conventional profilometry systems. Also, the STM offers a better quantitative means by which to analyze surface structures than the SEM. This paper discusses findings on several diamond turned OFHC copper samples having different cutting conditions. Each sample has been cross referenced using STM and SEM.

  15. APPLIANCE OF COMPETITORS TECHNIQUES IN LEADING THE SKIES IN TURNING

    Directory of Open Access Journals (Sweden)

    Rašid Hadžić

    2009-11-01

    Full Text Available Competitors techniques in skiing characterize driving on edges, without gliding in certain fazes of turning. Today that characteristic is more and more present in all di- scipline, (downhill, super G, giant slalom and slalom so we can talk about appliance of basic technique of leading skies on all disciplines, with differences in position of skies in amplitude of moving and frequencies of changes of edges. From that point of view we distinct three typical shape of moving in turning, which have mutual distinction in influence on ski loading, and that has influence on tur- ning line and acceleration or checking in certain fazes of turning.

  16. Beam polarization during a Siberian snake turn-on

    International Nuclear Information System (INIS)

    Anferov, Vladimir A.

    1999-01-01

    Installing Siberian snakes in a circular proton accelerator allows one to overcome all spin depolarizing resonances even at very high energies. However, Siberian snake application at low energies is technically rather difficult. Turning snake on at some energy during acceleration would allow using Siberian snakes even in rings with low injection energies. It is shown that the beam polarization would be preserved during the snake ramp, provided that the snake is turned on in more than ten turns, and the energy is set near a half-integer Gγ

  17. Differences of ballet turns (pirouette) performance between experienced and novice ballet dancers.

    Science.gov (United States)

    Lin, Chia-Wei; Chen, Shing-Jye; Su, Fong-Chin; Wu, Hong-Wen; Lin, Cheng-Feng

    2014-09-01

    This study investigated the different postural control strategies exhibited by experienced and novice dancers in ballet turns (pirouettes). Thirteen novice and 13 experienced dancers performed ballet turns with dominant-leg support. The peak push force was measured in the double-leg support phase. The inclination angles of rotation axis with respect to vertical axis were calculated in the early single-leg support phase as well as the initiation sequence of ankle, knee, and hip joints on the supporting leg. Moreover, the anchoring index of the head was computed in the transverse plane during turning. The novice dancers applied a greater push force, an increased inclination angle of rotation axis, and an insufficient proximal-to-distal extension sequence pattern. The novice dancers also had a smaller head-anchoring index compared with experienced dancers, which meant novice dancers were not using a space target as a stability reference. A poorer performance in novice dancers could result from higher push force in propulsion, lack of a "proximal-to-distal extension sequence" pattern, and lack of visual spotting for postural stability. Training on sequential initiation of lower-extremity joints and rehearsal of visual spotting are essential for novice dancers to obtain better performance on ballet turns.

  18. When the Stakes Turn Toxic: Learn about Problem Gambling

    Science.gov (United States)

    ... 2011 Print this issue When the Stakes Turn Toxic Learn About Problem Gambling Send us your comments ... gambling. you lose a job, educational opportunity or relationship because of gambling. you find that no matter ...

  19. ANALYSIS OF CHIP FORMATION DURING HARD TURNING THROUGH ACOUSTIC EMISSION

    Directory of Open Access Journals (Sweden)

    Miroslav Neslušan

    2012-01-01

    Full Text Available The paper deals with analysis of chip formation and related aspects of the chip formation during turning hardened steel 100Cr6. The paper draws a comparison of some aspects of the chip formation between turning annealed and hardened roll bearing steel. The results of the analysis show that there is the formation of a segmented chip in the case of hard turning. Frequency of segmentation is very high. A conventional piezoelectric dynamometer limits the frequency response to about 3.5 kHz. On the other hand, the frequency of process fluctuation may by obtained by using accelerometers or acoustic emission. This paper reports about the dynamic character of cutting process when hard turning and correlation among the calculated segmentation frequencies and the experimental analysis.

  20. Extended phenotype: nematodes turn ants into bird-dispersed fruits

    DEFF Research Database (Denmark)

    Hughes, D P; Kronauer, D J C; Boomsma, J J

    2008-01-01

    A recent study has discovered a novel extended phenotype of a nematode which alters its ant host to resemble ripe fruit. The infected ants are in turn eaten by frugivorous birds that disperse the nematode's eggs.......A recent study has discovered a novel extended phenotype of a nematode which alters its ant host to resemble ripe fruit. The infected ants are in turn eaten by frugivorous birds that disperse the nematode's eggs....

  1. Reducing gait speed affects axial coordination of walking turns.

    Science.gov (United States)

    Forsell, Caroline; Conradsson, David; Paquette, Caroline; Franzén, Erika

    2017-05-01

    Turning is a common feature of daily life and dynamic coordination of the axial body segments is a cornerstone for safe and efficient turning. Although slow walking speed is a common trait of old age and neurological disorders, little is known about the effect of walking speed on axial coordination during walking turns. The aim of this study was to investigate the influence of walking speed on axial coordination during walking turns in healthy elderly adults. Seventeen healthy elderly adults randomly performed 180° left and right turns while walking in their self-selected comfortable pace and in a slow pace speed. Turning velocity, spatiotemporal gait parameters (step length and step time), angular rotations and angular velocity of the head and pelvis, head-pelvis separation (i.e. the angular difference in degrees between the rotation of the head and pelvis) and head-pelvis velocity were analyzed using Wilcoxon signed-rank tests. During slow walking, turning velocity was 15% lower accompanied by shorter step length and longer step time compared to comfortable walking. Reducing walking speed also led to a decrease in the amplitude and velocity of the axial rotation of the head and pelvis as well as a reduced head-pelvis separation and angular velocity. This study demonstrates that axial coordination during turning is speed dependent as evidenced by a more 'en bloc' movement pattern (i.e. less separation between axial segments) at reduced speeds in healthy older adults. This emphasizes the need for matching speed when comparing groups with diverse walking speeds to differentiate changes due to speed from changes due to disease. Copyright © 2017 Elsevier B.V. All rights reserved.

  2. Some topics in process planning of rotational turning

    OpenAIRE

    Kundrák, János; Gyáni, Károly; Deszpoth, István; Sztankovics, István

    2014-01-01

    There could be different procedure variants of chip removal by the applied kinematic relations in turning operations. Recently, some research and analysis of these variants have come to the front since turning can replace grinding in precision machining operations due to the development of tools with geometrically defined cutting edge(s) and tool materials, even in machining of hardened surfaces. This frequently occurs in finish machining, therefore the application ...

  3. Compensations for increased rotational inertia during human cutting turns.

    Science.gov (United States)

    Qiao, Mu; Brown, Brian; Jindrich, Devin L

    2014-02-01

    Locomotion in a complex environment is often not steady state, but unsteady locomotion (stability and maneuverability) is not well understood. We investigated the strategies used by humans to perform sidestep cutting turns when running. Previous studies have argued that because humans have small yaw rotational moments of inertia relative to body mass, deceleratory forces in the initial velocity direction that occur during the turning step, or 'braking' forces, could function to prevent body over-rotation during turns. We tested this hypothesis by increasing body rotational inertia and testing whether braking forces during stance decreased. We recorded ground reaction force and body kinematics from seven participants performing 45 deg sidestep cutting turns and straight running at five levels of body rotational inertia, with increases up to fourfold. Contrary to our prediction, braking forces remained consistent at different rotational inertias, facilitated by anticipatory changes to body rotational speed. Increasing inertia revealed that the opposing effects of several turning parameters, including rotation due to symmetrical anterior-posterior forces, result in a system that can compensate for fourfold changes in rotational inertia with less than 50% changes to rotational velocity. These results suggest that in submaximal effort turning, legged systems may be robust to changes in morphological parameters, and that compensations can involve relatively minor adjustments between steps to change initial stance conditions.

  4. Single-layer and integrated YBCO gradiometer coupled SQUIDs

    Energy Technology Data Exchange (ETDEWEB)

    Baer, L.R.; Daalmans, G.M.; Barthel, K.H.; Ferchland, L.; Selent, M.; Kuehnl, M.; Uhl, D. [Siemens AG, Central Research and Development, Paul-Gossen-Strasse 100, D-91052 Erlangen (Germany)

    1996-04-01

    For many SQUID applications such as biomagnetism or non-destructive evaluation it is convenient or even necessary to work without the restrictions of a magnetically shielded room. This contribution deals with two sensors appropriate for this purpose. In the first concept we present a flip chip arrangement of a single-layer flux transformer and a single-layer SQUID, taking advantage of a simple technology. The SQUID was prepared on a 15x15 mm{sup 2} SrTiO{sub 3} 24 deg. bicrystal and located in the common line of two-parallel-loop arrangements. The flipped antenna was designed as a two-parallel-loop gradiometer with 26 mm baseline on a 10x40 mm{sup 2} LaAlO{sub 3} single-crystal substrate. A field gradient sensitivity of 1 nT cm{sup -1}{phi}{sub 0} was obtained. We could demonstrate a field gradient resolution of 20 fT cm{sup -1} Hz{sup 1/2} at 1 kHz in an unshielded environment. In the second concept we integrated both the flux antenna and the SQUID on a SrTiO{sub 3} bicrystal. The tighter coupling scheme results in smaller devices for similar field gradient sensitivities. The integrated SQUID is designed as a 3x8 mm{sup 2} device on a 10x10 mm{sup 2} bicrystal substrate. The remaining space is used for test structures and SQUIDs without antennae, in order to control the technology as well as the SQUID design. Parallel processed dummy substrates were used to monitor the quality of film growth by x-ray analysis. The quality of our SQUID design will be discussed on the basis of the measured field gradient sensitivity and noise. The reliability of the devices is demonstrated by an NDE type measurement. (author)

  5. Effects of ultrasonic vibrations in micro-groove turning.

    Science.gov (United States)

    Zhang, Chen; Guo, Ping; Ehmann, Kornel F; Li, Yingguang

    2016-04-01

    Ultrasonic vibration cutting is an efficient cutting process for mechanical micro-machining. This process can generate intricate surface textures with different geometric characteristics. Micro-grooves/micro-channels are among the most frequently encountered micro-structures and, as such, are the focus of this paper. The effectiveness of both the linear and ultrasonic elliptical vibration-assisted machining technique in micro-groove turning is analyzed and discussed in the paper. The paper first investigates the mechanisms of micro-groove generation induced by the linear and elliptical vibration modes. A simplified cutting force analysis method is given to compare the effectiveness of the two modes in micro-groove turning. The surface roughness of the generated micro-grooves is analyzed next and theoretical expressions are given for the two cases. Finally, micro-groove turning experiments are conducted to compare the influences of the two vibration modes on the cutting forces and the surface roughness. The experimental results show that linear vibration-assisted micro-groove turning leads to better surface roughness as compared to the elliptical vibration-assisted case, while elliptical vibration-assisted micro-groove turning shows advantages in terms of decreasing the cutting forces. Copyright © 2016 Elsevier B.V. All rights reserved.

  6. Breath holding during the turn in competitive swimming.

    Science.gov (United States)

    Craig, A B

    1986-08-01

    Breath holding times were measured during competition and averaged 5.0 sec in the breaststroke events, 4.3 sec in freestyle, 3.7 sec in butterfly, and 3.3 sec in backstroke. These times represented approximately 30% of the total time of swimming breaststroke and freestyle races but only 20% of the time of backstroke and butterfly events. Pulmonary gas exchanges of O2 and CO2 were studied in eight male swimmers during the first turn after the start of a swim and during the third turn after continuous swimming. It was concluded that biomechanical considerations of optimizing a turn are in most circumstances not limited by the increased PCO2 and the decreased PO2 in the alveoli related to the brief period of breath holding. In turns which last longer than about 5.5 s, the swimmers may experience a strong urge to breathe. This "breaking point" sensation is brief and need not compromise the conclusion of a well-executed turn.

  7. Wittgenstein and the linguistic turn in social theory

    DEFF Research Database (Denmark)

    Hermansen, Jens Christian

    is to develop a more comprehensive social theory that is sensitive to these strengths and thus supersedes the limits of the linguistic turn. This paper suggests a different approach. Against the critical turn, the paper argues that the limits of the linguistic turn are identical with the very assumptions......Historically, the influence of philosopher Peter Winch on the readings of Wittgenstein in the social sciences has been enormous. Though this paper deals mainly with what Winch took to be the implications for the social sciences of Wittgenstein's late philosophy as well as the later critique...... of Winch in social theory, the wider and more recent influence of Wittgenstein in areas such as technology and science studies, social theory, feminist and gender studies and conversation and discourse analysis is also considered. Historically, the readings of Wittgenstein in the social sciences have taken...

  8. Mechanical deflection analysis of diamond-turned reflective optics

    International Nuclear Information System (INIS)

    Stoneking, J.E.; Gerth, H.L.

    1977-12-01

    An analytical technique has been developed that predicts the amount of warpage that metal reflective mirrors sustain due to various support and load conditions. The laser fusion project being conducted at LASL requires that metal reflective optics be fabricated by diamond turning. The diamond-turning process imposes some unusual loading conditions which result in mirror warpage. The finite-element method is used to compute mirror surface displacements resulting from these support and load conditions. Surface warpage is then determined by a best-fit comparison of these data to the desired surface contour. The technique is not limited to diamond turning, but can be used to predict warpage from a variety of loading conditions placed on the mirrors

  9. The civic integrationist turn in Danish and Swedish school politics.

    Science.gov (United States)

    Fernández, Christian; Jensen, Kristian Kriegbaum

    2017-01-01

    The civic integrationist turn usually refers to the stricter requirements for residence and citizenship that many states have implemented since the late 1990's. But what of other policy spheres that are essential for the formation of citizens? Is there a civic turn in school policy? And does it follow the pattern of residence and citizenship? This article addresses these questions through a comparative study of the EU's allegedly strictest and most liberal immigration regimes, Denmark and Sweden, respectively. The analysis shows a growing concern with citizenship education in both countries, yet with different styles and content. Citizenship education in Denmark concentrates on reproducing a historically derived core of cultural values and knowledge to which minorities are expected to assimilate, while the Swedish model subscribes to a pluralist view that stresses mutual adaptation and intercultural tolerance. Despite claims to the contrary, the analysis shows that Sweden too has experienced a civic turn.

  10. Second language acquisition in Brazil since the social turn

    Directory of Open Access Journals (Sweden)

    Eduardo Henrique Diniz de Figueiredo

    Full Text Available ABSTRACT The present study is an appraisal of the literature that has been published in second language acquisition (SLA in Brazil since what is widely known as the social turn in the field (BLOCK, 2003. The objective of such an examination is to assess the impact that the social turn has had upon SLA research in the country. One hundred forty-one texts (among articles from top-ranked journals, theses, dissertations, and books were systematically reviewed and categorized based on three main criteria: a main topics, b SLA frameworks/approaches, and c methods used. The results show that socially-guided research seems to have gained space in SLA in Brazil since the social turn; however, cognitivist work in the country is still very strong, and little dialog seems to occur among these different perspectives on SLA.

  11. Non-invasive single-trial detection of variable population spike responses in human somatosensory evoked potentials.

    Science.gov (United States)

    Waterstraat, Gunnar; Scheuermann, Manuel; Curio, Gabriel

    2016-03-01

    Somatosensory evoked potentials (SEPs) around 600 Hz ('σ-bursts') are correlates of cortical population spikes. Recently, single-trial σ-bursts were detected in human scalp EEG using 29-channel low-noise recordings in an electromagnetically shielded room. To achieve clinical applicability, this study aimed to establish a protocol using only 8 EEG channels in an unshielded environment and to quantify the variability of σ-bursts. Median nerve SEPs were recorded in 10 healthy subjects using a custom-built low-noise EEG amplifier. A detection algorithm for single-trial σ-bursts was trained as combination of spatio-temporal filters and a non-linear classifier. The single-trial responses were probed for the presence of significant increases of amplitude and variability. Single-trial σ-burst detection succeeded with Detection Rates and Positive Predictive Values above 80% in subjects with high SNR. A significant inter-trial variability in the amplitudes of early low-frequency SEPs and σ-bursts could be demonstrated. Single-trial σ-bursts can be detected on scalp-EEG using only 8 EEG channels in an electromagnetically disturbed environment. The combination of dedicated hardware and detection algorithms allows quantifying and describing their variability. The variability of population spikes in the human somatosensory cortex can be traced non-invasively in a clinical setting. Copyright © 2015 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.

  12. Spatial turn and animation practices inspired by cultural anthropology

    Directory of Open Access Journals (Sweden)

    Agnieszka Wieszaczewska

    2016-09-01

    Full Text Available Spatial turn is one of the cultural turns, which have recently occurred in the humanities. It stresses the importance of issues such as space and place and can be successfully used as a theoretical perspective gaining use in thought over issues such as globalisation, transnationality, mapping but also education. In the discourses of pedagogical science space and place are considered through their multidimensional impact on education and learning. As significant concepts rooting pedagogy or pedagogy of borderland. The pedagogical reflection on space could be also used in the field of animation practices, especially in activities, which are related to place somehow colonised.

  13. A survey report for the turning of biped locomotion robot

    Energy Technology Data Exchange (ETDEWEB)

    Kato, Ichiro; Takanishi, Atsuo [Waseda Univ., Tokyo (Japan); Kume, Etsuo

    1992-12-01

    A mechanical design study of biped locomotion robots is going on at JAERI within the scope of the Human Acts Simulation Program (HASP). The design study at JAERI is of an arbitrarily mobile robot for inspection of nuclear facilities. A survey has been performed for collecting useful information from already existing biped locomotion robots. This is a survey report for the turning of biped locomotion robot: the WL-10R designed and developed at Waseda University. This report includes the control method of turning, machine model and control system. (author).

  14. A new inverter topology using GTO commutation. [Gate Turn Off thyristor

    Science.gov (United States)

    Rippel, W. E.

    1983-01-01

    A new N-phase, forced commutated bridge inverter topology has been developed wherein a single Gate Turn Off Thyristor (GTO) is used to commutate each of 2N main Thyristors (SCRs). Since, for most applications, the primary loss mechanism is the SCR forward drop, very high efficiencies are possible. Compared with conventional pure SCR and pure GTO inverters, cost per kW is lower - in the former case due to the large cost differential between GTOs and SCRs. Other advantages of the new inverter include high power density, low switching losses and stresses, modulation flexibility and amenability to high voltage and high frequency operation.

  15. Study on a magneto-rheological removal process of periodic turning marks

    Science.gov (United States)

    Jeon, Min-Woo; Jeong, Byeong-Joon; Hyun, Sang-Won; Lee, Kye-Sung; Han, Jeong-Yeol; Kim, Geon-Hee

    2017-10-01

    Single Point Diamond Turning (SPDT) has the potential to cost-effectively manufacture optical materials such as metals and plastic types. However, SPDT generally leaves tool marks on the machined surfaces, which creates problems that can deteriorate the optical performance. Several processes have been studied to eliminate the tool marks caused by SPDT, but it was difficult to carry out without the additional defects like sub-surface damages and other tool marks. To overcome this weakness, we investigated the Magneto-Rheological Finishing (MRF) process to effectively remove the periodic micro structures without surface deterioration for optical performance. The workpiece used in the experiment is a mirror plated with electroless nickel-phosphorus. Through the processing of the SPDT, an initial surface gets periodic tool marks, which have a height of 1.1 μm and a pitch of 20 μm. We studied on the reduction rate of the turning marks by the MRF process with some different conditions of uniform removal. The quantitative analysis of the surface roughness and residual marks was performed using a scanning low-coherence interferometer and through the Power Spectral Density (PSD) respectively. The results showed that reduction rates of tool marks depend on the angles (0, 45, and 90 degs) between the turning direction of the tool marks and the rotation direction of MR wheel. In the case of 45 degs, it indicated the fastest reduction rate.

  16. Synthetic Aperture Computation as the Head is Turned in Binaural Direction Finding

    Directory of Open Access Journals (Sweden)

    Duncan Tamsett

    2017-03-01

    Full Text Available Binaural systems measure instantaneous time/level differences between acoustic signals received at the ears to determine angles λ between the auditory axis and directions to acoustic sources. An angle λ locates a source on a small circle of colatitude (a lamda circle on a sphere symmetric about the auditory axis. As the head is turned while listening to a sound, acoustic energy over successive instantaneous lamda circles is integrated in a virtual/subconscious field of audition. The directions in azimuth and elevation to maxima in integrated acoustic energy, or to points of intersection of lamda circles, are the directions to acoustic sources. This process in a robotic system, or in nature in a neural implementation equivalent to it, delivers its solutions to the aurally informed worldview. The process is analogous to migration applied to seismic profiler data, and to that in synthetic aperture radar/sonar systems. A slanting auditory axis, e.g., possessed by species of owl, leads to the auditory axis sweeping the surface of a cone as the head is turned about a single axis. Thus, the plane in which the auditory axis turns continuously changes, enabling robustly unambiguous directions to acoustic sources to be determined.

  17. Vestibular ablation and a semicircular canal prosthesis affect postural stability during head turns

    Science.gov (United States)

    Thompson, Lara A.; Haburcakova, Csilla; Lewis, Richard F.

    2016-01-01

    In our study, we examined postural stability during head turns for two rhesus monkeys: one, single animal study contrasted normal and mild bilateral vestibular ablation and a second animal study contrasted severe bilateral vestibular ablation with and without prosthetic stimulation. The monkeys freely stood, unrestrained on a balance platform and made voluntary head turns between visual targets. To quantify each animals’ posture, motions of the head and trunk, as well as torque about the body’s center-of-mass, were measured. In the mildly ablated animal, we observed less foretrunk sway in comparison to the normal state. When the canal prosthesis provided electric stimulation to the severely ablated animal, it showed a decrease in trunk sway during head turns. Because the rhesus monkey with severe bilateral vestibular loss exhibited a decrease in trunk sway when receiving vestibular prosthetic stimulation, we propose that the prosthetic electrical stimulation partially restored head velocity information. Our results provide an indication that a semicircular canal prosthesis may be an effective way to improve postural stability in patients with severe peripheral vestibular dysfunction. PMID:27405997

  18. Cryogenic tests of bimetallic diamond-turned mirrors for the FRIDA integral field unit

    Science.gov (United States)

    DeWitt, Curtis; Eikenberry, Stephen; Cuevas Cardona, Salvador; Chapa, Oscar; Espejo, Carlos; Keiman, Carolina; Sanchez, Beatriz

    2008-07-01

    We describe diamond-turned material tests for the integral field unit (IFU) for the FRIDA instrument (inFRared Imager and Dissector for the Adaptive optics system of the Gran Telescopio Canarias). FRIDA is closely based on the design of the successful FISICA cryogenic infrared image slicing device, which used "monolithic" mirror arrays, diamond turned into single pieces of metal. FRIDA, however, will require better roughness characteristics than the 15nm RMS of FISICA to avoid light scatter in FRIDA's shorter wavelength limit (900nm). Al 6061 seems to be limited to this roughness level by its silicate inclusions so some new combination of materials that are compatible with FRIDA's Al 6061 structure must be found. To this end, we have tested six diamond-turned mirrors with different materials and different platings. We used the Zygo interferometer facility at IA-UNAM to do warm and cold profile measurements of the mirrors to investigate possible bimetallic deformation effects. We present a detailed comparison of the various performance characteristics of the test mirrors.

  19. Optimization of surface integrity in dry hard turning using RSM

    Indian Academy of Sciences (India)

    Abstract. This paper investigates the effect of different cutting parameters (cutting speed, feed rate, and depth of cut) on surface integrity defined in terms of surface roughness and microhardness in dry hard turning process. The workpiece material used was hardened alloy steel AISI 52100 and it was machined on a CNC ...

  20. The Effect of Organic Matter Content and Turning Cycle on ...

    African Journals Online (AJOL)

    Composting is an old technology and farmers have applied it in sustainable agriculture. In municipal solid waste management, composting can form part of an integrated system in handling waste for disposal. This study investigated the effect of organic matter content and turning cycle on the composting process of ...

  1. Understanding the Linguistic Turn and the Quest for Meaning ...

    African Journals Online (AJOL)

    Apart from Dilthey the linguistic turn penetrated also the thought of thinkers such as Freud, Wittgenstein, Frankl, Heidegger, Habermas, Dooyeweerd and Gadamer, all of them (implicitly or explicitly) elaborated the initial criticism raised by Herder, Jacobi, Hamann, Heidegger and Gadamer against Kant's Critique of Pure ...

  2. Universals and cultural variation in turn-taking in conversation

    NARCIS (Netherlands)

    Stivers, Tanya; Enfield, N. J.; Brown, Penelope; Englert, Christina; Hayashi, Makoto; Heinemann, Trine; Hoymann, Gertie; Rossano, Federico; de Ruiter, Jan Peter; Yoon, Kyung-Eun; Levinson, Stephen C.

    2009-01-01

    Informal verbal interaction is the core matrix for human social life. A mechanism for coordinating this basic mode of interaction is a system of turn-taking that regulates who is to speak and when. Yet relatively little is known about how this system varies across cultures. The anthropological

  3. A jump persistent turning walker to model zebrafish locomotion.

    Science.gov (United States)

    Mwaffo, Violet; Anderson, Ross P; Butail, Sachit; Porfiri, Maurizio

    2015-01-06

    Zebrafish are gaining momentum as a laboratory animal species for the investigation of several functional and dysfunctional biological processes. Mathematical models of zebrafish behaviour are expected to considerably aid in the design of hypothesis-driven studies by enabling preliminary in silico tests that can be used to infer possible experimental outcomes without the use of zebrafish. This study is motivated by observations of sudden, drastic changes in zebrafish locomotion in the form of large deviations in turn rate. We demonstrate that such deviations can be captured through a stochastic mean reverting jump diffusion model, a process that is commonly used in financial engineering to describe large changes in the price of an asset. The jump process-based model is validated on trajectory data of adult subjects swimming in a shallow circular tank obtained from an overhead camera. Through statistical comparison of the empirical distribution of the turn rate against theoretical predictions, we demonstrate the feasibility of describing zebrafish as a jump persistent turning walker. The critical role of the jump term is assessed through comparison with a simplified mean reversion diffusion model, which does not allow for describing the heavy-tailed distributions observed in the fish turn rate. © 2014 The Author(s) Published by the Royal Society. All rights reserved.

  4. Diamond turning and polishing tests on new RSP aluminium alloys

    NARCIS (Netherlands)

    Horst, R. ter; Haan, M. de; Gubbels, G.P.H.; Senden, R.; Venrooy, B.W.H. van; Hoogstrate, A.M.

    2012-01-01

    For years now conventional aluminium 6061 T6 has widely been used for mirrors in astronomical instruments, being diamond turned or since a few years also being optically polished. This allows the development of optical systems that can be tested and operated at any temperature, without being

  5. Supply and demand of timber for wood turning in Maine

    Science.gov (United States)

    Eric H. Wharton; Robert L., Jr. Nevel; Douglas S. Powell; Douglas S. Powell

    1987-01-01

    An analytical report on the volume of wood used by the wood-turning industry in Maine, and the volume of timber from the state's timberlands that may be suitable for turnstock. Findings are based on the third forest resource survey of Maine timberlands, and an industry canvass of primary manufacturing mills using wood from Maine timberlands, both conducted in 1982...

  6. Performances of cutting fluids in turning. Mineral oil - RM

    DEFF Research Database (Denmark)

    Axinte, Dragos Aurelian; Belluco, Walter

    1999-01-01

    Scope of the present measurement campaign is the evaluation of the cutting fluid performance. The report presents the standard routine and the results obtained when turning stainless steel and brass with a commercial vegetable based oil called RM. The methods were developed to be applicable...

  7. Performances of cutting fluids in turning. Vegetable based oil - RV

    DEFF Research Database (Denmark)

    Axinte, Dragos Aurelian; Belluco, Walter

    1999-01-01

    Scope of the present measurement campaign is the evaluation of the cutting fluid performance. The report presents the standard routine and the results obtained when turning stainless steel and brass with a commercial vegetable based oil called RV. The methods were developed to be applicable...

  8. Online Memorials 2.0: When Mourning Turns Social

    DEFF Research Database (Denmark)

    Gotved, Stine

    This paper investigates the turn from individual to social online mourning rituals and introduces a research project that follows a new memorial platform where the best from both sides are sought combined. The Danish online memorial site from 2000, mindet.dk, is about to launch in a version 2...

  9. A Rhetoric of Turns: Signs and Symbols in Education

    Science.gov (United States)

    Rutten, Kris; Soetaert, Ronald

    2014-01-01

    In our research and teaching we explore the value and the place of rhetoric in education. From a theoretical perspective we situate our work in different disciplines, inspired by major "turns": linguistic, cultural, anthropological/ethnographic, interpretive, semiotic, narrative, literary, rhetorical etc. In this article we engage in the…

  10. Optimization of turning process parameters by using grey-Taguchi ...

    African Journals Online (AJOL)

    The main objective of this study is to improve toughness and hardness of engineering material by changing the machining parameters of turning process. By applying Taguchi method the quality of manufactured goods, and engineering designs are developed by studying variations. In this work, an attempt has been made to ...

  11. Turning shopping habits of young consumers into green

    NARCIS (Netherlands)

    Bialkova, Svetlana; van 't Erve, Sanne; van Hoof, Joris Jasper; Pruyn, Adriaan T.H.; Bigné, Enrique

    2014-01-01

    Consumers have strong shopping habits, and although being aware of sustainable issues, they hardly do green shopping. Therefore, a challenging question is: how to break the old shopping habits and turn those into green? The current study addresses this question looking at barriers and potential

  12. The turning of the wind in the atmospheric boundary layer

    DEFF Research Database (Denmark)

    Pena Diaz, Alfredo; Gryning, Sven-Erik; Floors, Rogier Ralph

    2014-01-01

    at the Høvsøre site in Denmark, which is a flat farmland area with a nearly homogeneous easterly upstream sector. Therefore, within that sector, the turning of the wind is caused by a combination of atmospheric stability, Coriolis, roughness, horizontal pressure gradient and baroclinity effects. Atmospheric...

  13. On Kinesic Triadic Relations in Turn-Taking

    Science.gov (United States)

    Pike, Kenneth L.

    1975-01-01

    This article discusses three characteristics useful in defining the relations between speakers in the turn-taking aspects of conversation: the derivational history of personal relationships, stop-action pseudo-history versus dynamic compacted posing, and the criss-crossing of verbal versus kinetic axes. (Available from Semiotica, Co-Libri, P.O.…

  14. Turn me on 100 easy ways to use solar energy

    CERN Document Server

    Kodis, Michelle

    2009-01-01

    HERE COMES THE SUN! With page after page of creative and innovative ideas for using this limitless form of energy, as well as thoughtfully compiled lists of useful resources, Turn Me On is an introductory guide to understanding the exciting advances in a progressing technology that harnesses the boundless power of the sun to bring us clean, renewable energy.

  15. Stuart Cloete's construction of voortrekker religion in Turning Wheels ...

    African Journals Online (AJOL)

    Stuart Cloete's novel of 1937, Turning Wheels, was unquestionably the most controversial of many fictional reconstructions of the Great Trek, a book which fell foul of Afrikaner nationalism and whose further importation into the Union of South Africa was long consequently banned. Religious motifs reflecting the popularised ...

  16. Turning of materials with high-speed abrasive waterjet

    Czech Academy of Sciences Publication Activity Database

    Sitek, Libor; Hlaváček, Petr

    -, October 2016 (2016), s. 1160-1165 ISSN 1805-0476 R&D Projects: GA MŠk ED2.1.00/03.0082; GA MŠk(CZ) LO1406 Institutional support: RVO:68145535 Keywords : abrasive water jet machining * turning * steel * rock * wood Subject RIV: JQ - Machines ; Tools http://www.mmscience.eu/content/file/archives/MM_Science_201692.pdf

  17. Optimization of surface integrity in dry hard turning using RSM

    Indian Academy of Sciences (India)

    This paper investigates the effect of different cutting parameters (cutting speed, feed rate, and depth of cut) on surface integrity defined in terms of surface roughness and microhardness in dry hard turning process. The workpiece material used was hardened alloy steel AISI 52100 and it was machined on a CNC lathe with ...

  18. Spanish and American Turn-Taking Styles: A Comparative Study.

    Science.gov (United States)

    Berry, Anne

    A comparative study of turn-taking in North American and Spanish conversation investigated (1) differences in styles for the two cultures and (2) any resulting misinterpretation of communicative intentions. Data for the first were drawn from two dinner parties, one with four American women, conducted in English, and one with four Spanish-speaking…

  19. Optimization of surface integrity in dry hard turning using RSM

    Indian Academy of Sciences (India)

    power transmission components. Bearing steels (e.g., AISI 52100) are the most common exam- ples of these materials, which are conventionally finished by grinding (Diniz et al 2003; Ramesh et al 2005; Umbrello et al 2008; Paiva et al 2009; Thiele & Melkote 1999). Hard turning is generally used as a substitute to grinding ...

  20. CNC Turning Technician. A Competency-Based Instructional System.

    Science.gov (United States)

    Sloan, Kelly; Hilley, Robert

    This competency-based curriculum guide for instructing students in using computer numerically controlled (CNC) turning machines is one of a series of instructional guides for the machinist field developed in Oklahoma. Although developed jointly with Baxter Technologies Corporation and oriented toward the Baxter Vo-Tec 2000 Future Builder CNC…

  1. Cutting power prediction model for turning of GFRP composites ...

    African Journals Online (AJOL)

    user

    Glass fiber reinforced plastic (GFRP) composite materials are replacing traditional engineering materials owing to their superior properties ... highly corrosive industrial applications. They are ... (2000) turning operation is one of the most important operation used for machine elements construction in manufacturing industries ...

  2. Characterization of jellyfish turning using 3D-PTV

    Science.gov (United States)

    Xu, Nicole; Dabiri, John

    2017-11-01

    Aurelia aurita are oblate, radially symmetric jellyfish that consist of a gelatinous bell and subumbrellar muscle ring, which contracts to provide motive force. Swimming is typically modeled as a purely vertical motion; however, asymmetric activations of swim pacemakers (sensory organs that innervate the muscle at eight locations around the bell margin) result in turning and more complicated swim behaviors. More recent studies have examined flow fields around turning jellyfish, but the input/output relationship between locomotive controls and swim trajectories is unclear. To address this, bell kinematics for both straight swimming and turning are obtained using 3D particle tracking velocimetry (3D-PTV) by injecting biocompatible elastomer tags into the bell, illuminating the tank with ultraviolet light, and tracking the resulting fluorescent particles in a multi-camera setup. By understanding these kinematics in both natural and externally controlled free-swimming animals, we can connect neuromuscular control mechanisms to existing flow measurements of jellyfish turning for applications in designing more energy efficient biohybrid robots and underwater vehicles. NSF GRFP.

  3. Postcolonial turn : re-imagining anthropology and Africa

    NARCIS (Netherlands)

    Devisch, R.; Nyamnjoh, F.

    2011-01-01

    This book is a reflection on the mental decolonization of the postcolonialist turn in Africanist scholarship and is simultaneously a tribute to the late Professor Archibald Mafeje. A number of the articles, including the Introduction by A. Olukoshi and F. Nyamnjoh, are reprinted from the Codesria

  4. The 'Turn to Parenting': Paradigm shift or work in progress?

    NARCIS (Netherlands)

    Hopman, M.; Knijn, G.C.M.

    In the field of child and youth support, preventive and parent-oriented support programs are currently emphasized. This is understood as a new paradigm of parenting support, which is sometimes referred to as “the turn to parenting.” Using Campbell’s (Annual Review of Sociology, 28:21–38, 2002),

  5. Diplomas Count 2013: Second Chances--Turning Dropouts into Graduates

    Science.gov (United States)

    Education Week, 2013

    2013-01-01

    The 2013 edition of "Diplomas Count," entitled "Second Chances: Turning Dropouts into Graduates," examines dropout recovery and innovative strategies for returning to the educational fold the 1 million students who leave school without a diploma each year. "Education Week's" journalists investigate interventions that…

  6. Student Wellbeing and the Therapeutic Turn in Education

    Science.gov (United States)

    Wright, Katie

    2014-01-01

    This article considers current concerns with promoting student mental health and wellbeing against the backdrop of critiques of the "therapeutic turn" in education. It begins by situating accounts of "therapeutic education" within broader theorisation of therapeutic culture. In doing so, the importance of this work is…

  7. The Digital Turn. How the internet transforms our existence

    NARCIS (Netherlands)

    Westera, Wim

    2014-01-01

    The presentation is based on my book The Dital Turn. The swift virtualisation of the world implies a radical change of the conditions of life. We have to cope with the fact that our experiences of the world will largely be mediated experiences, fuelled by data, cameras, sensors, indicators and

  8. Getting 'Entangled': Reflexivity and the 'Critical Turn' in Tourism Studies

    NARCIS (Netherlands)

    Ateljevic, I.; Harris, C.; Wilson, E.; Collins, F.L.

    2005-01-01

    Reflecting a broader postmodern shift to unmask the cultural politics of research and knowledge-making in academia, tourism studies as a field is demonstrating a notable `critical turn¿ ¿ a shift in thought that serves to provide and legitimise a space for more interpretative and critical modes of

  9. Turning Sunlight into Electricity-Inorganic Solar Cells and Beyond

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 16; Issue 12. Turning Sunlight into Electricity - Inorganic Solar Cells and Beyond. A K Shukla. Volume 16 Issue 12 December 2011 pp 1294-1302. Fulltext. Click here to view fulltext PDF. Permanent link:

  10. Ten-metre walk, with or without a turn?

    NARCIS (Netherlands)

    van Herk, IEH; Arendzen, J. Hans; Rispens, P

    Objective: To compare results obtained using different procedures to measure 10-metre walking time. Design: Walking was limed over a straight 10 m, and over 5 m with return, Further, the time taken to turn was measured directly. Setting: Rehabilitation department of a university hospital. Subjects:

  11. Using Facebook Data to Turn Introductory Statistics Students into Consultants

    Science.gov (United States)

    Childers, Adam F.

    2017-01-01

    Facebook provides businesses and organizations with copious data that describe how users are interacting with their page. This data affords an excellent opportunity to turn introductory statistics students into consultants to analyze the Facebook data using descriptive and inferential statistics. This paper details a semester-long project that…

  12. Intelligent Tool Condition Monitoring In High-Speed Turning Of ...

    African Journals Online (AJOL)

    In this paper, a Multi-Layered Perceptron (MLP) neural net-work model has been developed for on-line condition monitoring of tool wear in high-speed turning of Titanium-based alloy (Ti-6Al-4V). Machining trials were ... The neural network model was designed using Matlab® neural toolbox. Accuracy of model for the ...

  13. Investing in Training and Development. Turning Interest into Capital.

    Science.gov (United States)

    Pont, Tony

    This book, which is intended for individuals responsible for human resource development (HRD) programs, examines a number of issues in turning investments in training and development into human capital and examines ways of making the workplace an arena for development. The following topics are discussed: the nature and role of training and…

  14. Causal Role of Motor Simulation in Turn-Taking Behavior.

    Science.gov (United States)

    Hadley, Lauren V; Novembre, Giacomo; Keller, Peter E; Pickering, Martin J

    2015-12-16

    Overlap between sensory and motor representations has been documented for a range of human actions, from grasping (Rizzolatti et al., 1996b) to playing a musical instrument (Novembre and Keller, 2014). Such overlap suggests that individuals use motor simulation to predict the outcome of observed actions (Wolpert, 1997). Here we investigate motor simulation as a basis of human communication. Using a musical turn-taking task, we show that pianists call on motor representations of their partner's part to predict when to come in for their own turn. Pianists played alternating solos with a videoed partner, and double-pulse transcranial magnetic stimulation was applied around the turn-switch to temporarily disrupt processing in two cortical regions implicated previously in different forms of motor simulation: (1) the dorsal premotor cortex (dPMC), associated with automatic motor resonance during passive observation of hand actions, especially when the actions are familiar (Lahav et al., 2007); and (2) the supplementary motor area (SMA), involved in active motor imagery, especially when the actions are familiar (Baumann et al., 2007). Stimulation of the right dPMC decreased the temporal accuracy of pianists' (right-hand) entries relative to sham when the partner's (left-hand) part had been rehearsed previously. This effect did not occur for dPMC stimulation without rehearsal or for SMA stimulation. These findings support the role of the dPMC in predicting the time course of observed actions via resonance-based motor simulation during turn-taking. Because turn-taking spans multiple modes of human interaction, we suggest that simulation is a foundational mechanism underlying the temporal dynamics of joint action. Even during passive observation, seeing or hearing somebody execute an action from within our repertoire activates motor cortices of our brain. But what is the functional relevance of such "motor simulation"? By combining a musical duet task with a real

  15. Turn around management of open-cast lignite mines in Kosovo; Turn Around Management der Braunkohletagebaue im Kosovo

    Energy Technology Data Exchange (ETDEWEB)

    Hoehna, U. [Vattenfall Europe Mining AG, Cottbus (Germany). Vattenfall Mining Consulting

    2008-03-15

    In their cooperation in turn around management of KEK, Vattenfall Europe Mining Consulting made an important contribution to supporting the Kosovo. In spite of limited resources and a short time available, many practical steps were taken, and effective, sustainable and safe operation of the open-cast mine was achieved. (orig.)

  16. Morphing of Building Footprints Using a Turning Angle Function

    Directory of Open Access Journals (Sweden)

    Jingzhong Li

    2017-06-01

    Full Text Available We study the problem of morphing two polygons of building footprints at two different scales. This problem frequently occurs during the continuous zooming of interactive maps. The ground plan of a building footprint on a map has orthogonal characteristics, but traditional morphing methods cannot preserve these geographic characteristics at intermediate scales. We attempt to address this issue by presenting a turning angle function-based morphing model (TAFBM that can generate polygons at an intermediate scale with an identical turning angle for each side. Thus, the orthogonal characteristics can be preserved during the entire interpolation. A case study demonstrates that the model yields good results when applied to data from a building map at various scales. During the continuous generalization, the orthogonal characteristics and their relationships with the spatial direction and topology are well preserved.

  17. Turn-key SRF accelerators to drive subcritical reactors

    International Nuclear Information System (INIS)

    Johnson, Rolland P.

    2011-01-01

    Large particle accelerator projects, both accomplished and proposed, have been used to engage US industry through contracts and grants to develop efficient capabilities to design, develop, produce, and deliver entire accelerator systems or any needed subsystems. Staffed in many cases by experienced scientists and engineers from National Laboratories and Universities, existing companies could extend their portfolios to offer turn-key accelerators with parameters to match the needs of ADS. If the reactors were based on molten salt fuel such that trip rate requirements were relaxed, the developments needed for a multi-MW proton accelerator for ADS would be minimal. Turn-key SRF proton linacs for ADS operation can be ordered now to enable GW-level power generation from natural thorium, natural uranium, or nuclear waste from conventional reactors. (author)

  18. Welcome to the revolution: The sensory turn and art history

    Directory of Open Access Journals (Sweden)

    Jenni Lauwrens

    2012-12-01

    Full Text Available Discourses concerned with the sensorially embodied subject have emerged since the 1990s in various disciplines including history, anthropology, sociology, geography, film studies and literary studies. The purpose of this article is to bring the conversation regarding audiences’ embodied engagement in culture closer to art history by investigating the implications of what has been termed the sensory turn for this discipline. One of the accusations lodged against art history by supporters of the multi-sensoriality of embodied human experience is its alleged ocularcentrism, the implication of which is a detached autonomous subject. In this article, the sensory turn is defined and contextualized, particularly in light of the body of criticism targeted at art history’s emphasis on the visual. The proposed ways in which art historians might usefully deal with audience’s embodied experiences of not only immersive installation works of art, but also artworks in traditional media, such as painting and photography, are teased apart.

  19. Turned trochoidal disturbance on a liquid jet surface

    Science.gov (United States)

    Sadik, Shalom; Kirzhner, Felix; Kramarenko, Denis

    2014-07-01

    This paper shows that a turned trochoidal function disturbance may lead to peripheral drops production. The resulting model is used to describe that a turned trochoidal disturbance leads to peripheral drops production on the liquid jet surface without the necessity for superimposed disturbances. The trochoid is a non-unique parametric function. Only non-unique parametric functions disturbances may lead to peripheral drops production. The trochoidal function disturbance is decomposed to Fourier series. Every Fourier element receives an amplification factor in accordance to the Rayleigh inviscid jet model. Peripheral drops are received on the jet surface. The paper shows that all trochoidal disturbance functions, prolate cycloid, cycloid and curtate cycloid have a capability of peripheral drops producing. A limited capability of peripheral drops production is introduced for the trochoidal curtate cycloid. Produced drops size are reduced for increasing the jet velocity and wave number. Smaller drops are also received by transition from the prolate cycloid to curtate cycloid disturbance.

  20. Left-handed helical preference in an achiral peptide chain is induced by an L-amino acid in an N-terminal type II β-turn.

    Science.gov (United States)

    De Poli, Matteo; De Zotti, Marta; Raftery, James; Aguilar, Juan A; Morris, Gareth A; Clayden, Jonathan

    2013-03-15

    Oligomers of the achiral amino acid Aib adopt helical conformations in which the screw-sense may be controlled by a single N-terminal residue. Using crystallographic and NMR techniques, we show that the left- or right-handed sense of helical induction arises from the nature of the β-turn at the N terminus: the tertiary amino acid L-Val induces a left-handed type II β-turn in both the solid state and in solution, while the corresponding quaternary amino acid L-α-methylvaline induces a right-handed type III β-turn.

  1. Turning the tide : tidal power in the UK

    OpenAIRE

    Sustainable Development Commission

    2007-01-01

    Contents: Turning the tide : tidal power in the UK -- Executive summary -- Tidal power in the UK : research report 1 : UK tidal resource assessment -- Tidal power in the UK : research report 2 : tidal technologies overview -- Tidal power in the UK : research report 3 : Severn barrage proposals -- Tidal power in the UK : research report 4 : Severn non-barrage options -- Tidal power in the UK : research report 5 : UK case studies. Summarised in the Welsh language version of the executive ...

  2. Performances of cutting fluids in turning. Formulated oil - E

    DEFF Research Database (Denmark)

    Axinte, Dragos A.; Steffanato, Simone

    Tool life is a parameter closely connected to the lubricating effect of a cutting fluid. Long tool life in turning corresponds to good lubrication and a process with good lubrication is preferred, since it normally results in lower tool wear and better surface quality. Cutting forces are mainly...... important for understanding the mechanism of the cutting process itself and to perform in this way data about the influence of the cutting fluids....

  3. Turning an Urban Scene Video into a Cinemagraph

    OpenAIRE

    Yan, Hang; Liu, Yebin; Furukawa, Yasutaka

    2016-01-01

    This paper proposes an algorithm that turns a regular video capturing urban scenes into a high-quality endless animation, known as a Cinemagraph. The creation of a Cinemagraph usually requires a static camera in a carefully configured scene. The task becomes challenging for a regular video with a moving camera and objects. Our approach first warps an input video into the viewpoint of a reference camera. Based on the warped video, we propose effective temporal analysis algorithms to detect reg...

  4. Analysis of the influence of tool dynamics in diamond turning

    Energy Technology Data Exchange (ETDEWEB)

    Fawcett, S.C.; Luttrell, D.E.; Keltie, R.F.

    1988-12-01

    This report describes the progress in defining the role of machine and interface dynamics on the surface finish in diamond turning. It contains a review of literature from conventional and diamond machining processes relating tool dynamics, material interactions and tool wear to surface finish. Data from experimental measurements of tool/work piece interface dynamics are presented as well as machine dynamics for the DTM at the Center.

  5. The performative turn at Inhotim: installation art and Baudelairean modernity

    OpenAIRE

    Lauren S. Weingarden

    2013-01-01

    This article explores the participatory turn in installation art as part of a trajectory from Baudelairean modernity to twentyfirst-century postmodernity, as represented at Inhotim, the outdoor contemporary art museum and botanical gardens in Brumadinho, MG. In his 1862 essay “The Painter of ModernLife,” Charles Baudelaire defined modernity as fleeting, transitory and fragmentary. Baudelairean modernity initiated a breakdown of boundaries between art and life and between high art aesthetics a...

  6. Fuzzy Linguistic Optimization on Surface Roughness for CNC Turning

    OpenAIRE

    Lan, Tian-Syung

    2010-01-01

    Surface roughness is often considered the main purpose in contemporary computer numerical controlled (CNC) machining industry. Most existing optimization researches for CNC finish turning were either accomplished within certain manufacturing circumstances or achieved through numerous equipment operations. Therefore, a general deduction optimization scheme is deemed to be necessary for the industry. In this paper, the cutting depth, feed rate, speed, and tool nose runoff with low, medium, and...

  7. Ribosomal RNA Kink-turn motif - A flexible molecular hinge

    Czech Academy of Sciences Publication Activity Database

    Rázga, F.; Špačková, Naďa; Réblová, K.; Koča, J.; Leontis, N. B.; Šponer, Jiří

    2004-01-01

    Roč. 22, č. 2 (2004), s. 183-193 ISSN 0739-1102 R&D Projects: GA MŠk LN00A016 Grant - others:Wellcome Trust(GB) GR067507MF; National Institutes of Health(US) 2R15 GM55898 Institutional research plan: CEZ:AV0Z5004920 Keywords : ribosomal RNA * K-turn * molecular dynamics Subject RIV: BO - Biophysics Impact factor: 1.113, year: 2004

  8. Ribosomal RNA Kink-turn motif - a flexible molecular hinge

    Czech Academy of Sciences Publication Activity Database

    Rázga, Filip; Špačková, Naďa; Réblová, K.; Koča, J.; Leontis, Neocles B.; Šponer, Jiří

    2005-01-01

    Roč. 12, č. 1 (2005), s. 38-38 ISSN 1211-5894. [Setkání českých a slovenských strukturních biologů 2005. Nové Hrady, 15.09.2005-20.09.2005] Institutional research plan: CEZ:AV0Z50040507 Keywords : Kink-turn motif Subject RIV: BO - Biophysics

  9. Mycoleptodiscus terrestris: An Endophyte Turned Latent Pathogen of Eurasian Watermilfoil

    Science.gov (United States)

    2009-03-01

    Clavicipitaceous fungal endophytes of grasses: Coevolution and the change from parasitism to mutualism. In Co-evolution of fungi with plants and animals, ed...Recovery of endophytic fungi from Myriophyllum spicatum. APCRP Technical Notes Collection. ERDC TN-APCRP-BC-03. Vicksburg, MS: U.S. Army Engineer...ERDC/TN APCRP-BC-11 March 2009 1 Mycoleptodiscus terrestris: An Endophyte Turned Latent Pathogen of Eurasian Watermilfoil by Judy F

  10. Machining parameter optimization in turning process for sustainable manufacturing

    OpenAIRE

    S. G. Dambhare; S. J. Deshmukh; A. B. Borade

    2015-01-01

    There is an increase in awareness about sustainable manufacturing process. Manufacturing industries are backbone of a country’s economy. Although it is important but there is a great concern about consumption of resources and waste creation. The primary aim of this study was to explore sustainability concern in turning process in an Indian machining industry. The effect of cutting parameters, Speed/Feed/Depth of Cut, the machining environment, Dry/MQL/Wet, and the type of cutting tool on sust...

  11. Enhanced ultrasonically assisted turning of a β-titanium alloy.

    Science.gov (United States)

    Maurotto, Agostino; Muhammad, Riaz; Roy, Anish; Silberschmidt, Vadim V

    2013-09-01

    Although titanium alloys have outstanding mechanical properties such as high hot hardness, a good strength-to-weight ratio and high corrosion resistance; their low thermal conductivity, high chemical affinity to tool materials severely impair their machinability. Ultrasonically assisted machining (UAM) is an advanced machining technique, which has been shown to improve machinability of a β-titanium alloy, namely, Ti-15-3-3-3, when compared to conventional turning processes. Copyright © 2013 Elsevier B.V. All rights reserved.

  12. Computational modeling of turn-taking dynamics in spoken conversations

    OpenAIRE

    Chowdhury, Shammur Absar

    2017-01-01

    The study of human interaction dynamics has been at the center for multiple research disciplines in- cluding computer and social sciences, conversational analysis and psychology, for over decades. Recent interest has been shown with the aim of designing computational models to improve human-machine interaction system as well as support humans in their decision-making process. Turn-taking is one of the key aspects of conversational dynamics in dyadic conversations and is an integral part of hu...

  13. Fuzzy Linguistic Optimization on Surface Roughness for CNC Turning

    Directory of Open Access Journals (Sweden)

    Tian-Syung Lan

    2010-01-01

    Full Text Available Surface roughness is often considered the main purpose in contemporary computer numerical controlled (CNC machining industry. Most existing optimization researches for CNC finish turning were either accomplished within certain manufacturing circumstances or achieved through numerous equipment operations. Therefore, a general deduction optimization scheme is deemed to be necessary for the industry. In this paper, the cutting depth, feed rate, speed, and tool nose runoff with low, medium, and high level are considered to optimize the surface roughness for finish turning based on L9(34 orthogonal array. Additionally, nine fuzzy control rules using triangle membership function with respective to five linguistic grades for surface roughness are constructed. Considering four input and twenty output intervals, the defuzzification using center of gravity is then completed. Thus, the optimum general fuzzy linguistic parameters can then be received. The confirmation experiment result showed that the surface roughness from the fuzzy linguistic optimization parameters is significantly advanced compared to that from the benchmark. This paper certainly proposes a general optimization scheme using orthogonal array fuzzy linguistic approach to the surface roughness for CNC turning with profound insight.

  14. A Rationally Designed Reversible 'Turn-Off' Sensor for Glutathione.

    Science.gov (United States)

    Heng, Sabrina; Zhang, Xiaozhou; Pei, Jinxin; Abell, Andrew D

    2017-09-06

    γ-Glutamyl-cysteinyl-glycine (GSH) plays a critical role in maintaining redox homeostasis in biological systems and a decrease in its cellular levels is associated with diseases. Existing fluorescence-based chemosensors for GSH acts as irreversible reaction-based probes that exhibit a maximum fluorescence ('turn-on') once the reaction is complete, regardless of the actual concentration of GSH. A reversible, reaction-based 'turn-off' probe ( 1 ) is reported here to sense the decreasing levels of GSH, a situation known to occur at the onset of various diseases. The more fluorescent merocyanine (MC) isomer of 1 exists in aqueous solution and this reacts with GSH to induce formation of the ring-closed spiropyran (SP) isomer, with a measurable decrease in absorbance and fluorescence ('turn-off'). Sensor 1 has good aqueous solubility and shows an excellent selectivity for GSH over other biologically relevant metal ions and aminothiol analytes. The sensor permeates HEK 293 cells and an increase in fluorescence is observed on adding buthionine sulfoximine, an inhibitor of GSH synthesis.

  15. Leibniz, Lefebvre and the spatial turn in law

    Directory of Open Access Journals (Sweden)

    Isolde de Villiers

    2016-11-01

    Full Text Available This contribution takes as its point of departure the spatial turn in law and the notion of spatial justice. It traces the term ‘spatial justice’ as introduced through the Spatial Planning and Land Use Management Act and it looks at the underlying view of space that has influenced the spatial turn in law. It furthermore investigates the ways in which the spatial turn in law has been influenced by the thinking of Henri Lefebvre, who relies on a Leibnizian conception of space. Lastly the link between Leibniz and legal positivism is considered in order to reach the final conclusion in the form of a caution against merely adding the language of spatial justice to an approach to space that remains caught up in abstract space. This will only further entrench existing fault lines in society. For this conclusion the work of Roger Berkowitz is central. Berkowitz argues convincingly that the work of Leibniz was central in the development of legal positivism, despite Leibniz in general being considered as a natural law thinker. The same applies to spatial justice theory, where the work of Leibniz is central: it may present the possibilities of another law – the law as it ought to be. The law conceptualised as ‘ought’ instead of ‘is’ would promote reconciliation. Alternatively, spatial justice can simply present the law as it ‘is’ and reconfirm and deepen the chasms in our world.

  16. Medium dependent dual turn on/turn off fluorescence sensing for Cu2+ions using AMI/SDS assemblies.

    Science.gov (United States)

    Gujar, Varsha B; Ottoor, Divya

    2017-02-15

    Behavior of Amiloride (AMI) as a metal ion sensor in anionic surfactant assemblies of varying concentrations at different pH is depicted in this work. From a non-sensor fluorophore, AMI has been transformed in to a tunable fluorosensor for Cu 2+ ions in various SDS concentrations. At premicellar concentration of SDS, ion-pair complex is expected to be formed between AMI and SDS due to electrostatic interactions between them. However at CMC concentrations of SDS, fluorescence intensity of AMI is greatly enhanced with red shift in emission, due to the incorporation of AMI molecule in the hydrophobic micellar interface. The behavior of metal sensing by AMI-SDS assemblies gives rise to several interesting observations. Micellation of SDS has been greatly enhanced by increasing copper ion concentrations, as these counter ions screens the charge on monomers of SDS which lead to the aggregation at premicellar concentrations only. Concentrations and pH dependent discrete trends of interactions between SDS-AMI and SDS-Cu 2+ ions, have given tunable fluorescence responses (fluorescence turn on/turn off) of AMI for added Cu 2+ ions. The electrostatic interaction between the metal cations and the anionic surfactants is the driving force for bringing the metal ions near to the vicinity of micelle where AMI resides. Thus, a comprehensive understanding of the mechanism related to the 'turn on-turn off' fluorescence response of AMI with respect to pH and SDS concentration for effective Cu 2+ ion sensing is illustrated in this work. Copyright © 2016 Elsevier B.V. All rights reserved.

  17. Simulation of turn-by-turn passage of protons through the H-minus stripping foil in booster

    Energy Technology Data Exchange (ETDEWEB)

    Gardner, C. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2017-07-06

    Equations for transverse emittance growth due to multiple passes of circulating proton beam through the H-minus stripping foil in Booster were developed in [1]. These were based on simple principles of statistics and simple assumptions about the initial distribution of particles incident on the foil. It was assumed there that the foil dimensions and position of the incoming beam are such that all particles hit the foil on every turn around the machine. In the present note we assume only that all incoming H-minus ions from Linac hit the foil and are stripped of their electrons. The resulting protons circulate indefinitely around the machine. Setups in which the foil width is reduced so that not all protons hit the foil on every turn are studied here by simulation. The aim is to determine the effectiveness of such setups in reducing the emittance growth of circulating proton beam during the injection of H-minus beam. The simulations also serve as a check of the equations developed in [1], and vice versa. The particulars of the simulation setup are given in Sections 1 through 11. Figures 1 through 12 show simulation results for the case in which all particles hit the foil on every turn. The results are in good agreement with those obtained from the equations of reference [1]. Figures 13 through 19 show simulation results for various setups in which the foil width is reduced. These results are summarized in Section 12. In all gures the horizontal axis gives the turn number. The unit of the vertical axis is micrometers ( m) in all plots of emittance.

  18. A falling of the veils: turning points and momentous turning points in leadership and the creation of CSR

    OpenAIRE

    Hemingway, C.; Starkey, Kenneth

    2017-01-01

    This article uses the life stories approach to leadership and leadership development. Using exploratory, qualitative data from a Forbes Global 2000 and FTSE 100 company, we discuss the role of the turning point (TP) as an important antecedent of leadership in corporate social responsibility. We argue that TPs are causally efficacious, linking them to the development of life narratives concerned with an evolving sense of personal identity. Using both a multi-disciplinary perspective and a mult...

  19. The Opportunities and Threats of Turning Airports into Hubs

    Science.gov (United States)

    Kraus, Andreas; Koch, Benjamin

    2006-01-01

    This paper examines the opportunities and threats which arise when turning origin/destination airports into hubs. The analysis focuses on market development trends, competitive structures, especially in the light of airline network strategies and the growing rivalry between airports, and finally the potential financial impacts for the airport, including both investment efforts and the financial results from hub operations. We argue that in most cases a decision against converting a traditional origin/destination airport into a major transfer point is preferable to the transformation into a hub.

  20. Varieties of publication patterns in neuroscience at the cognitive turn.

    Science.gov (United States)

    Christen, Markus

    2008-01-01

    The quantification of publication activity and impact has become a key element in the evaluation of scientific excellence. However, it is unclear to what extent this grasps the diversity of research communication that accompanies the transition of scientific fields. This contribution investigates number, categorization, and impact of publications (i.e., publication patterns) of six scientists active at the cognitive turn, which promoted the information processing perspective on neuronal processes in different communities: Horace Barlow, Theodore Bullock, Ralph Gerard, Donald MacKay, Warren McCulloch, and Werner Reichardt. The large variety of publication patterns revealed indicates the limits of standardized evaluation procedures based on publication activity.

  1. Turning a Poor Ion Channel into a Good Pump

    Science.gov (United States)

    Astumian, Dean

    2003-05-01

    We consider a membrane protein that can exist in two configurations, either one of which acts as a poor ion channel, allowing ions to slowly leak across the membrane from high to low elctrochemical potential. We show that random external fluctuations can provide the energy to turn this poor channel into a good pump that drives ion transport from low to high electrochemical potential. We discuss this result in terms of a gambling analogy, and point to possible implications for fields as far ranging as population biology, economics, and actuarial science.

  2. Why nature doesn't turn off neurosis.

    Science.gov (United States)

    Badalamenti, Anthony F

    2013-03-01

    This paper develops an integration of psychoanalytic and wisdom tradition concepts to answer the question as to why nature does not turn off neurosis, The proposed answer is that nature wants a person to exploit the neurosis for two gains, one being the increase in adaptive capacity resulting from releasing it and the second involving the difficulty in the release itself, the latter related to gains proffered by the world's wisdom traditions. These see a movement from the psyche's creation by passive, unconscious means of finite promise rooted in parental love to creation by active, consciously chosen means of unlimited promise involving a direct relationship with nature and the Cosmos.

  3. Big data analytics turning big data into big money

    CERN Document Server

    Ohlhorst, Frank J

    2012-01-01

    Unique insights to implement big data analytics and reap big returns to your bottom line Focusing on the business and financial value of big data analytics, respected technology journalist Frank J. Ohlhorst shares his insights on the newly emerging field of big data analytics in Big Data Analytics. This breakthrough book demonstrates the importance of analytics, defines the processes, highlights the tangible and intangible values and discusses how you can turn a business liability into actionable material that can be used to redefine markets, improve profits and identify new business opportuni

  4. The embodied turn in research on language and social interaction

    DEFF Research Database (Denmark)

    Nevile, Maurice

    2015-01-01

    I use the term the embodied turn to mean the point when interest in the body became established among researchers on language and social interaction, exploiting the greater ease of video-recording. This review paper tracks the growth of "embodiment" in over 400 papers published in Research...... on Language and Social Interaction from 1987-2013. I consider closely two areas where analysts have confronted challenges, and how they have responded: settling on precise and analytically helpful terminology for the body; and transcribing and representing the body, particularly its temporality and manner....

  5. Tool life of ceramic wedges during precise turning of tungsten

    Directory of Open Access Journals (Sweden)

    Legutko Stanislaw

    2017-01-01

    Full Text Available Properties, application and machinability of tungsten and its alloys have been demonstrated. The comparison of the tool life and wear of the wedges made of SiAlON and whisker ceramics during the precise turning at different cutting parameters have been presented. The CNC lathe DMG CTX 310 Ecoline and tungsten of 99.7 % purity were used during the experiments. Only the wedge of whisker ceramics has proved to be sufficiently suitable and only for relatively low cutting speeds.

  6. Serials cataloging at the turn of the century

    CERN Document Server

    Williams, James W

    2014-01-01

    An overview of the research topics and trends that have appeared over the last five years, Serials Cataloging at the Turn of the Century doesn't just tell you that there has been a lot of change--that the information environment is something of a chameleon, always beguiling and slipping out of grasp. Instead, it gives you the plain facts on the specific challenges serials catalogers have been facing and how they're meeting adversity head-on, ready to gain the advantage in the rumble with proliferating information and formats.Comprehensive, resource-packed, and easy-to-digest, Serials Catalogin

  7. Orbiter 'Enterprise' turns and banks during second ALT

    Science.gov (United States)

    1977-01-01

    The Orbiter 101 'Enterprise' makes a turn and bank maneuver during the second free flight of the Shuttle Apporach and Landing Tests (ALTs) conducted on September 13, 1977 at Dryden Flight Research Center in Southern California. The 'Enterprise' separated form the NASA 747 carrier aircraft and after a five-minute, 28-second unpowered flight landed on a runway below. Astronauts Joe H. Engle, and Richard H. Truly were the crew of the 'Enterprise.' The ALT free flights are designed to verify Orbiter subsonic airworthiness, integrated systems operations and pilot-guided approach and landing capability and satisfying prerequisites to automatic flight control and navigation mode.

  8. Turn and jump: how time & place fell apart

    CERN Document Server

    Mansfield, Howard

    2013-01-01

    Before Thomas Edison, light and fire were thought to be one and the same. Turns out, they were separate things altogether. This book takes a similar relationship, that of time and place, and shows how they, too, were once inseparable. Time keeping was once a local affair, when small towns set their own pace according to the rising and setting of the sun. Then, in 1883, the expanding railroads necessitated the creation of Standard Time zones, and communities became linked by a universal time. Here Howard Mansfield explores how our sudden interconnectedness, both physically, as through the railroad, and through inventions like the telegraph, changed our concept of time and place forever.

  9. Initiating Interactive Turn Spaces in Japanese Conversation: Local Projection and Collaborative Action

    Science.gov (United States)

    Iwasaki, Shimako

    2009-01-01

    Shifting from a focus on transitions between speakers at turn boundaries, this study examines projective and multimodal structures "inside" a turn-constructional unit (TCU), out of which any turn is built. It analyzes how particular noun-phrasal components within a TCU become projective and shape interactive turn spaces (ITSs) where…

  10. Model-based chatter stability prediction and detection for the turning of a flexible workpiece

    Science.gov (United States)

    Lu, Kaibo; Lian, Zisheng; Gu, Fengshou; Liu, Hunju

    2018-02-01

    Machining long slender workpieces still presents a technical challenge on the shop floor due to their low stiffness and damping. Regenerative chatter is a major hindrance in machining processes, reducing the geometric accuracies and dynamic stability of the cutting system. This study has been motivated by the fact that chatter occurrence is generally in relation to the cutting position in straight turning of slender workpieces, which has seldom been investigated comprehensively in literature. In the present paper, a predictive chatter model of turning a tailstock supported slender workpiece considering the cutting position change during machining is explored. Based on linear stability analysis and stiffness distribution at different cutting positions along the workpiece, the effect of the cutting tool movement along the length of the workpiece on chatter stability is studied. As a result, an entire stability chart for a single cutting pass is constructed. Through this stability chart the critical cutting condition and the chatter onset location along the workpiece in a turning operation can be estimated. The difference between the predicted tool locations and the experimental results was within 9% at high speed cutting. Also, on the basis of the predictive model the dynamic behavior during chatter that when chatter arises at some cutting location it will continue for a period of time until another specified location is arrived at, can be inferred. The experimental observation is in good agreement with the theoretical inference. In chatter detection respect, besides the delay strategy and overlap processing technique, a relative threshold algorithm is proposed to detect chatter by comparing the spectrum and variance of the acquired acceleration signals with the reference saved during stable cutting. The chatter monitoring method has shown reliability for various machining conditions.

  11. Ultra-precision turning of complex spiral optical delay line

    Science.gov (United States)

    Zhang, Xiaodong; Li, Po; Fang, Fengzhou; Wang, Qichang

    2011-11-01

    Optical delay line (ODL) implements the vertical or depth scanning of optical coherence tomography, which is the most important factor affecting the scanning resolution and speed. The spinning spiral mirror is found as an excellent optical delay device because of the high-speed and high-repetition-rate. However, it is one difficult task to machine the mirror due to the special shape and precision requirement. In this paper, the spiral mirror with titled parabolic generatrix is proposed, and the ultra-precision turning method is studied for its machining using the spiral mathematic model. Another type of ODL with the segmental shape is also introduced and machined to make rotation balance for the mass equalization when scanning. The efficiency improvement is considered in details, including the rough cutting with the 5- axis milling machine, the machining coordinates unification, and the selection of layer direction in turning. The onmachine measuring method based on stylus gauge is designed to analyze the shape deviation. The air bearing is used as the measuring staff and the laser interferometer sensor as the position sensor, whose repeatability accuracy is proved up to 10nm and the stable feature keeps well. With this method developed, the complex mirror with nanometric finish of 10.7nm in Ra and the form error within 1um are achieved.

  12. Beyond Cultural History? The Material Turn, Praxiography, and Body History

    Directory of Open Access Journals (Sweden)

    Iris Clever

    2014-10-01

    Full Text Available The body came to be taken seriously as a topic of cultural history during the “corporeal” or “bodily” turn in the 1980s and 1990s. Soon, however, critique was raised against these studies’ conceptualization of the body as discursively shaped and socially disciplined: individual bodily agency and feeling were felt to be absent in the idea of the material body. This article critically analyzes new approaches in the field of body history, particularly the so-called “material turn”. It argues that the material turn, especially in the guise of praxiography, has a lot to offer historians of the body, such as more attention to material practices, to different kinds of actors and a more open eye to encounters. Potential problems of praxiographical analyses of the body in history include the complicated relationship between discourses and practices and the neglect of the political and feminist potential of deconstructive discourse analyses. However, a focus on the relationship between practices of knowledge production and the representation of the body may also provide new ways of opening up historical power relations.

  13. Development of a Low Cost MQL Setup for Turning Operations

    Directory of Open Access Journals (Sweden)

    Islam Sumaiya

    2017-01-01

    Full Text Available In this study, the effect of MQL application on the tool wear, surface roughness and chip formation in turning Aluminum alloy 6061 is investigated. Experiments were carried out by plain turning of an Aluminum bar with varying depth of cut, cutting speeds (spindle speed and cutting environments (Dry, Wet and MQL. A newly designed, cost efficient and portable MQL setup was developed for this study. For each experimental trial, five passes were carried out in order to promote the formation of tool wear. After each pass, the tool surface was examined under a microscope and the surface roughness was measured using a stylus based surface tester. The extent of tool wear from each pass is measured by using ImageJ software. Chips were collected after the five passes and were physically examined. The newly designed MQL delivery system was successful in delivering a fine mist of lubricant at the cutting point. MQL lubrication provided lower surface roughness and tool wear values compared to wet and dry conditions due to effective temperature reduction and improved lubrication penetration of cutting zones, as well as better chip flushing. Chip formed under MQL conditions had reduced chip thickness due to reduced temperatures. MQL was found to have the greatest positive impact on tool wear and surface roughness parameters based on ANOVA results.

  14. Energy-Based Analysis of Ultrasonically Assisted Turning

    Directory of Open Access Journals (Sweden)

    G.A. Volkov

    2011-01-01

    Full Text Available The process of ultrasonically-assisted turning (UAT is a superposition of vibration of a cutting tool on its standard movement in conventional turning (CT. The former technique has several advantages compared with the latter, one of the main being a significant decrease in the level of cutting forces. In this paper the effects observed in UAT are analysed employing ideas of dynamic fracture mechanics. The active stage of loading duration depends heavily on ultrasonic frequency and the cutting speed; he application of the fracture criterion based on the notion of incubation time makes it possible to calculate a dependence of this duration on its threshold amplitude. An estimation of energy, necessary to create a threshold pulse in the material, is made by solving the contact Hertz problem. The obtained time dependence of energy has a marked minimum. Thus, the existence of energy-efficient loading duration is demonstrated. This explains the decrease in the cutting force resulting from superimposed ultrasonic vibration. The obtained results are in agreement with experiments on ultrasonic assisted machining of aluminium and Inconel 718 alloy.

  15. Surface roughness when diamond turning RSA 905 optical aluminium

    Science.gov (United States)

    Otieno, T.; Abou-El-Hossein, K.; Hsu, W. Y.; Cheng, Y. C.; Mkoko, Z.

    2015-08-01

    Ultra-high precision machining is used intensively in the photonics industry for the production of various optical components. Aluminium alloys have proven to be advantageous and are most commonly used over other materials to make various optical components. Recently, the increasing demand from optical systems for optical aluminium with consistent material properties has led to the development of newly modified grades of aluminium alloys produced by rapid solidification in the foundry process. These new aluminium grades are characterised by their finer microstructures and refined mechanical and physical properties. However the machining database of these new optical aluminium grades is limited and more research is still required to investigate their machinability performance when they are diamond turned in ultrahigh precision manufacturing environment. This work investigates the machinability of rapidly solidified aluminium RSA 905 by varying a number of diamond-turning cutting parameters and measuring the surface roughness over a cutting distance of 4 km. The machining parameters varied in this study were the cutting speed, feed rate and depth of cut. The results showed a common trend of decrease in surface roughness with increasing cutting distance. The lowest surface roughness Ra result obtained after 4 km in this study was 3.2 nm. This roughness values was achieved using a cutting speed of 1750 rpm, feed rate of 5 mm/min and depth of cut equal to 25 μm.

  16. SURFACE INTEGRITY EVALUATION OF TURNING WITH AUTO-ROTATING TOOL

    Directory of Open Access Journals (Sweden)

    Jozef Struharnansky

    2016-09-01

    Full Text Available The technical practice requirements comes to have increased demands on higher productivity, speed and quality of the machining process of various materials. Hard to machine materials, whose machining led to the development of turning with rotating cutting edge are not an exception. The machining process of auto-rotating tool is more complicated than the conventional process of turning, especially for the process of reshaping cutting layers into chips. There is a significant load in the system, that may affect the life of the cutting edge of the tool as well as the whole system and also in the final extent of the qualitative parameters of the workpiece (product / product. The article specifies the knowledge and findings of measurement in machining material 100Cr6 with an auto-rotating tool. The measurements were conducted to evaluate the integrity of the surface (roughness of the workpiece to the impacts of cutting conditions, in particular the feed and the cutting edge inclination. It also analyzes the presence (size, character, action of residual stresses concentrated in the surface layers of the workpiece by changing the cutting conditions.

  17. Machining parameter optimization in turning process for sustainable manufacturing

    Directory of Open Access Journals (Sweden)

    S. G. Dambhare

    2015-09-01

    Full Text Available There is an increase in awareness about sustainable manufacturing process. Manufacturing industries are backbone of a country’s economy. Although it is important but there is a great concern about consumption of resources and waste creation. The primary aim of this study was to explore sustainability concern in turning process in an Indian machining industry. The effect of cutting parameters, Speed/Feed/Depth of Cut, the machining environment, Dry/MQL/Wet, and the type of cutting tool on sustainability factors under study were observed. Analysis of Variance (ANOVA was used to analyse the data obtained from experimentation in a small scale machining industry. The process is modelled mathematically using response surface methodology (RSM.The economic and environmental aspect like surface roughness, material removal rate and energy consumption were considered as sustainability factors. The model helps to understand the effect of the cutting parameters and conditions on surface finish, energy consumption, and material removal rate. The process was optimized for minimum power consumption considering environmental concern as prime importance. Studies suggest that the cutting environment and tool type influenced on the power consumption during turning process. Extended form of the proposed model could be useful to predict the environmental impact due to machining process, which would bring environmental concern into conventional machining.

  18. NetTurnP – Neural Network Prediction of Beta-turns by Use of Evolutionary Information and Predicted Protein Sequence Features

    DEFF Research Database (Denmark)

    Petersen, Bent; Lundegaard, Claus; Petersen, Thomas Nordahl

    2010-01-01

    is the highest reported performance on a two-class prediction of β-turn and not-β-turn. Furthermore NetTurnP shows improved performance on some of the specific β-turn types. In the present work, neural network methods have been trained to predict β-turn or not and individual β-turn types from the primary amino......β-turns are the most common type of non-repetitive structures, and constitute on average 25% of the amino acids in proteins. The formation of β-turns plays an important role in protein folding, protein stability and molecular recognition processes. In this work we present the neural network method...... NetTurnP, for prediction of two-class β-turns and prediction of the individual β-turn types, by use of evolutionary information and predicted protein sequence features. It has been evaluated against a commonly used dataset BT426, and achieves a Matthews correlation coefficient of 0.50, which...

  19. Turning gene function ON and OFF using sense and antisense photo-morpholinos in zebrafish

    Science.gov (United States)

    Tallafuss, Alexandra; Gibson, Dan; Morcos, Paul; Li, Yongfu; Seredick, Steve; Eisen, Judith; Washbourne, Philip

    2012-01-01

    To understand the molecular mechanisms of development it is essential to be able to turn genes on and off at will and in a spatially restricted fashion. Morpholino oligonucleotides (MOs) are very common tools used in several model organisms with which it is possible to block gene expression. Recently developed photo-activated MOs allow control over the onset of MO activity. However, deactivation of photo-cleavable MO activity has remained elusive. Here, we describe photo-cleavable MOs with which it is possible to activate or de-activate MO function by UV exposure in a temporal and spatial manner. We show, using several different genes as examples, that it is possible to turn gene expression on or off both in the entire zebrafish embryo and in single cells. We use these tools to demonstrate the sufficiency of no tail expression as late as tailbud stage to drive medial precursor cells towards the notochord cell fate. As a broader approach for the use of photo-cleavable MOs, we show temporal control over gal4 function, which has many potential applications in multiple transgenic lines. We demonstrate temporal manipulation of Gal4 transgene expression in only primary motoneurons and not secondary motoneurons, heretofore impossible with conventional transgenic approaches. In another example, we follow and analyze neural crest cells that regained sox10 function after deactivation of a photo-cleavable sox10-MO at different time points. Our results suggest that sox10 function might not be critical during neural crest formation. PMID:22492359

  20. Turning gene function ON and OFF using sense and antisense photo-morpholinos in zebrafish.

    Science.gov (United States)

    Tallafuss, Alexandra; Gibson, Dan; Morcos, Paul; Li, Yongfu; Seredick, Steve; Eisen, Judith; Washbourne, Philip

    2012-05-01

    To understand the molecular mechanisms of development it is essential to be able to turn genes on and off at will and in a spatially restricted fashion. Morpholino oligonucleotides (MOs) are very common tools used in several model organisms with which it is possible to block gene expression. Recently developed photo-activated MOs allow control over the onset of MO activity. However, deactivation of photo-cleavable MO activity has remained elusive. Here, we describe photo-cleavable MOs with which it is possible to activate or de-activate MO function by UV exposure in a temporal and spatial manner. We show, using several different genes as examples, that it is possible to turn gene expression on or off both in the entire zebrafish embryo and in single cells. We use these tools to demonstrate the sufficiency of no tail expression as late as tailbud stage to drive medial precursor cells towards the notochord cell fate. As a broader approach for the use of photo-cleavable MOs, we show temporal control over gal4 function, which has many potential applications in multiple transgenic lines. We demonstrate temporal manipulation of Gal4 transgene expression in only primary motoneurons and not secondary motoneurons, heretofore impossible with conventional transgenic approaches. In another example, we follow and analyze neural crest cells that regained sox10 function after deactivation of a photo-cleavable sox10-MO at different time points. Our results suggest that sox10 function might not be critical during neural crest formation.

  1. A comparative study on performance of CBN inserts when turning steel under dry and wet conditions

    Science.gov (United States)

    Abdullah Bagaber, Salem; Razlan Yusoff, Ahmad

    2017-10-01

    Cutting fluids is the most unsustainable components of machining processes, it is negatively impacting on the environmental and additional energy required. Due to its high strength and corrosion resistance, the machinability of stainless steel has attracted considerable interest. This study aims to evaluate performance of cubic boron nitride (CBN) inserts for the machining parameters includes the power consumption and surface roughness. Due to the high single cutting-edge cost of CBN, the performance of significant is importance for hard finish turning. The present work also deals with a comparative study on power consumption and surface roughness under dry and flood conditions. Turning process of the stainless steel 316 was performed. A response surface methodology based box-behnken design (BBD) was utilized for statistical analysis. The optimum process parameters are determined as the overall performance index. The comparison study has been done between dry and wet stainless-steel cut in terms of minimum value of energy and surface roughness. The result shows the stainless still can be machined under dry condition with 18.57% improvement of power consumption and acceptable quality compare to the wet cutting. The CBN tools under dry cutting stainless steel can be used to reduce the environment impacts in terms of no cutting fluid use and less energy required which is effected in machining productivity and profit.

  2. Where Could an Anthropological Turn Lead the Humanities and the Arts

    Directory of Open Access Journals (Sweden)

    Hans Ulrich Gumbrecht

    2012-05-01

    Full Text Available This paper discusses the possible significations of a so-called anthropological turn in the field of the Humanities and Arts. The text focuses on the meaning of Anthropology and its application in these fields. In this sense, two great conceptions of Anthropology are distinguished: an understanding of Anthropology as an attempt at a singular, meta-historical and transcultural determination of a valid definition of what it means to be human; and another whose use predominates in the Anglo-American contemporary context, in which different ways of being human are considered, instead of a single conception. The text also discusses the word ‘reviravolta’ [overturn] which the Humanities and the Arts have been trying to point out and identify as what is or should be the contemporary thought in those fields.

  3. O turning point da grande reportagem multimídia

    OpenAIRE

    Longhi, Raquel Ritter; Universidade Federal de Santa Catarina / Campus Reitor João David Ferreira Lima. Florianópolis, Santa Catarina. Brasil. CEP: 88049-900 Tel: (48) 3721.9000

    2015-01-01

    Este artigo analisa o estado da arte da grande reportagem multimídia no jornalismo online, atentando para um momento que se pode definir como “turning point”, ou ponto de virada desse tipo de formato noticioso. A partir de uma sistematização da evolução dos formatos expressivos multimidiáticos da notícia no jornalismo digital, o artigo identifica três momentos principais dessa trajetória: o slide-show noticioso, no início dos anos 2000; os especiais multimídia, de meados de 2000 a 2011 e a gr...

  4. The Turn to Precarity in Twenty-First Century Fiction

    Directory of Open Access Journals (Sweden)

    Morrison Jago

    2014-01-01

    Full Text Available Recent years have seen several attempts by writers and critics to understand the changed sensibility in post-9/11 fiction through a variety of new -isms. This essay explores this cultural shift in a different way, finding a ‘turn to precarity’ in twenty-first century fiction characterised by a renewal of interest in the flow and foreclosure of affect, the resurgence of questions about vulnerability and our relationships to the other, and a heightened awareness of the social dynamics of seeing. The essay draws these tendencies together via the work of Judith Butler in Frames of War, in an analysis of Trezza Azzopardi’s quasi-biographical study of precarious life, Remember Me.

  5. An adaptation framework for turning real life events into games

    DEFF Research Database (Denmark)

    Therkildsen, Sacha Kjærhus; Bunkenborg, Nanna Cassøe; Larsen, Lasse Juel

    2017-01-01

    Many games are inspired by real life events. The presented adaptation framework is based on the design of a board game with a companion app that addresses the Syrian refugee crisis. The aim of the game is to allow players to simulate the experience of being a Syrian refugee traveling through Europe....... We applied an agile development method and participatory design to achieve our ambition. In conclusion we found that turning real life events into board games can be advanced by the following game design adaptation framework, which balances four interrelated layers: (1) real life events (game fiction......), (2) game system (formal game elements), (3) movement system (game mechanisms), and (4) meaning (player choice) which prioritise game over story....

  6. Mobility Turn in Contemporary Society as an Educational Challenge

    Directory of Open Access Journals (Sweden)

    Denys Svyrydenko

    2016-07-01

    Full Text Available The main idea of the research is to uncover the series of challenges produced by the social dynamics with one’s mobile nature. Using methodological potential of social philosophy author attempts to demonstrate the essence and logics of mobility turn as a metaphor of contemporary society development. Author shows the radical changes at social-cultural dynamics which are also concieved by the modern social sciences (sociology of mobilities, series of postmodern concepts such as nomad etc. Using methodological approaches of philosophy of education author formulates “order of the day” of the mobility challenges at higher education sphere. Author shows that educational sphere also becomes mobile transforming the character of one’s vital activity, but also actualizing some special phenomena such as academic mobility. Formulating “order of the day” of mobility challenges to modern higher education, author demonstrates the horizon of future researches due to complex nature of researched problem

  7. Chip breaking for an automated accurate turning system

    Energy Technology Data Exchange (ETDEWEB)

    Burnham, M.W. (BDM Corp., Albuquerque, NM (USA)); Abbatiello, L.A. (Oak Ridge Y-12 Plant, TN (USA))

    1988-01-01

    Based upon a survey of chip breakup information, the various methods have been evaluated for application to automated accurate turning systems. Many chip breaking methods work well on shafts or cylinders but fail to break chips for an entire inside or outside contouring cut. Many metals produce straight or snarled chip forms at small depths of cut, feed rates, or moderate surface speeds. These chip forms can be a cause of workpiece and tool damage. Such forms also interfere with on-machine gaging, part transfer, and tool change. Often the chip wraps around the tool holder and is difficult to remove even in manual operation. Computer analysis now makes it possible to get the most of each types of chip breaking system. Reliable ship breaking is urgently needed for automated systems, especially those operating in an unmanned mode. 83 refs., 10 figs., 2 tabs.

  8. Chip breaking and control for a precision automated turning system

    Energy Technology Data Exchange (ETDEWEB)

    Burnham, M.W. (BDM International, Inc., McLean, VA (USA)); Abbatiello, L.A. (Martin Marietta Energy Systems, Inc., Oak Ridge, TN (USA))

    1990-01-01

    Chip breaking and control is essential to automatic operation of precision turning systems. Failure to transfer parts and system jams can occur if chip fragments are not continuously removed. Surface damage and tool breakage also result from chips that are permitted to wrap around the tool. Also, with increasing environmental concerns, chip handling and recycling are becoming major issues in manufacturing. New information on a variety of mechanisms for breaking chips and methods for removal from the system are discussed. Some of the chip breaking methods are evaluated for the range of cutting in which they are effective. Chip curl and chip breaking analyzed carefully by Nakayama and others is expanded to more fully understand the ways in which chips can be broken. 23 figs.

  9. What turns assistive into restorative brain-machine interfaces?

    Directory of Open Access Journals (Sweden)

    Alireza Gharabaghi

    2016-10-01

    Full Text Available Brain-machine interfaces (BMI may support motor impaired patients during activities of daily living by controlling external devices such as prostheses (assistive BMI. Moreover, BMIs are applied in conjunction with robotic orthoses for rehabilitation of lost motor function via neurofeedback training (restorative BMI. Using assistive BMI in a rehabilitation context does not automatically turn them into restorative devices. This perspective article suggests key features of restorative BMI and provides the supporting evidence:In summary, BMI may be referred to as restorative tools when demonstrating subsequently (i operant learning and progressive evolution of specific brain states/dynamics, (ii correlated modulations of functional networks related to the therapeutic goal, (iii subsequent improvement in a specific task, and (iv an explicit correlation between the modulated brain dynamics and the achieved behavioral gains. Such findings would provide the rationale for translating BMI-based interventions into clinical settings for reinforcement learning and motor rehabilitation following stroke.

  10. Turning bubbles on and off during boiling using charged surfactants.

    Science.gov (United States)

    Cho, H Jeremy; Mizerak, Jordan P; Wang, Evelyn N

    2015-10-21

    Boiling--a process that has powered industries since the steam age--is governed by bubble formation. State-of-the-art boiling surfaces often increase bubble nucleation via roughness and/or wettability modification to increase performance. However, without active in situ control of bubbles, temperature or steam generation cannot be adjusted for a given heat input. Here we report the ability to turn bubbles 'on and off' independent of heat input during boiling both temporally and spatially via molecular manipulation of the boiling surface. As a result, we can rapidly and reversibly alter heat transfer performance up to an order of magnitude. Our experiments show that this active control is achieved by electrostatically adsorbing and desorbing charged surfactants to alter the wettability of the surface, thereby affecting nucleation. This approach can improve performance and flexibility in existing boiling technologies as well as enable emerging or unprecedented energy applications.

  11. New algorithms for power transformer inter-turn fault protection

    Energy Technology Data Exchange (ETDEWEB)

    Wiszniewski, Andrzej; Rebizant, Waldemar [The Wroclaw University of Technology, Wyb. Wyspianskiego 27, 50-370 Wroclaw (Poland); Schiel, Ludwig [The Siemens AG, PTD EA, Berlin (Germany)

    2009-10-15

    In the paper new algorithms for detection of internal inter-turn faults in power transformers are described. Such faults are extremely difficult to detect since they induce negligible increase of the currents at the transformer terminals, although the currents flowing at the fault place are very high and dangerous for the transformer to be protected. The algorithms developed are based on the differential equation of the equivalent circuit of the transformer. In one version additional information from a CT installed inside of the triangle of delta side windings is used, which brings very promising results. Theoretical investigations are supported and illustrated with simulation studies performed both with MATLAB and EMTP-ATP programs. (author)

  12. Hole Feature on Conical Face Recognition for Turning Part Model

    Science.gov (United States)

    Zubair, A. F.; Abu Mansor, M. S.

    2018-03-01

    Computer Aided Process Planning (CAPP) is the bridge between CAD and CAM and pre-processing of the CAD data in the CAPP system is essential. For CNC turning part, conical faces of part model is inevitable to be recognised beside cylindrical and planar faces. As the sinus cosines of the cone radius structure differ according to different models, face identification in automatic feature recognition of the part model need special intention. This paper intends to focus hole on feature on conical faces that can be detected by CAD solid modeller ACIS via. SAT file. Detection algorithm of face topology were generated and compared. The study shows different faces setup for similar conical part models with different hole type features. Three types of holes were compared and different between merge faces and unmerge faces were studied.

  13. Turning the Ship: The Transformation of DESY, 1993-2009

    Science.gov (United States)

    Heinze, Thomas; Hallonsten, Olof; Heinecke, Steffi

    2017-12-01

    This article chronicles the most recent history of the Deutsches Elektronen-Synchrotron (DESY) located in Hamburg, Germany, with particular emphasis on how this national laboratory founded for accelerator-based particle physics shifted its research program toward multi-disciplinary photon science. Synchrotron radiation became DESY's central experimental research program through a series of changes in its organizational, scientific, and infrastructural setup and the science policy context. Furthermore, the turn toward photon science is part of a broader transformation in the late twentieth century in which nuclear and particle physics, once the dominating fields in national and international science budgets, gave way to increasing investment in the materials sciences and life sciences. Synchrotron radiation research took a lead position on the experimental side of these growing fields and became a new form of big science, generously funded by governments and with user communities expanding across both academia and industry.

  14. On the relaxation of magnetospheric convection when Bz turns northward

    Directory of Open Access Journals (Sweden)

    M. C. Kelley

    2012-06-01

    Full Text Available The solar wind inputs considerable energy into the upper atmosphere, particularly when the interplanetary magnetic field (IMF is southward. According to Poynting's theorem (Kelley, 2009, this energy becomes stored as magnetic fields and then is dissipated by Joule heat and by energizing the plasmasheet plasma. If the IMF turns suddenly northward, very little energy is transferred into the system while Joule dissipation continues. In this process, the polar cap potential (PCP decreases. Experimentally, it was shown many years ago that the energy stored in the magnetosphere begins to decay with a time constant of two hours. Here we use Poynting's theorem to calculate this time constant and find a result that is consistent with the data.

  15. Selection of a suitable multiresponse optimization technique for turning operation

    Directory of Open Access Journals (Sweden)

    I. Nayak

    2016-01-01

    Full Text Available The present work deals with the comparison of four multi response optimization methods, viz. multiple response signal-to-noise (MRSN ratio, weighted signal-to-noise (WSN ratio, Grey relational analysis (GRA, and VIKOR (VlseKriterijumska Optimizacija I Kompromisno Resenje in Serbian methods taking a case study in turning mild steel specimen using HSS cutting tool. The various factors like cutting speed, feed rate, depth of cut and coolant flow rate are considered as the input process variables, while the material removal rate (MRR, surface roughness (SR and specific energy consumption (SEC are considered as various performance characteristics. One set of experimental data is analyzed using the standardized procedures. The optimization performances of these four methods are compared. The results show that MRSN ratio method proves to be the best optimization method. It is found that the feed rate has a highest impact on the overall performance as compared to other process parameters.

  16. What Turns Assistive into Restorative Brain-Machine Interfaces?

    Science.gov (United States)

    Gharabaghi, Alireza

    2016-01-01

    Brain-machine interfaces (BMI) may support motor impaired patients during activities of daily living by controlling external devices such as prostheses (assistive BMI). Moreover, BMIs are applied in conjunction with robotic orthoses for rehabilitation of lost motor function via neurofeedback training (restorative BMI). Using assistive BMI in a rehabilitation context does not automatically turn them into restorative devices. This perspective article suggests key features of restorative BMI and provides the supporting evidence: In summary, BMI may be referred to as restorative tools when demonstrating subsequently (i) operant learning and progressive evolution of specific brain states/dynamics, (ii) correlated modulations of functional networks related to the therapeutic goal, (iii) subsequent improvement in a specific task, and (iv) an explicit correlation between the modulated brain dynamics and the achieved behavioral gains. Such findings would provide the rationale for translating BMI-based interventions into clinical settings for reinforcement learning and motor rehabilitation following stroke.

  17. Experimental investigation of surface roughness in electrical discharge turning process

    Science.gov (United States)

    Gohil, Vikas; Puri, Y. M.

    2016-10-01

    In the present study the effects of machining parameters on the average surface roughness (Ra) in electrical discharge turning (EDT) is investigated. EDT is a new machining process in which a rotary spindle is added to a conventional die-sinking EDM machine in order to produce cylindrical components. In this method a new process parameter (spindle rotation) along with pulse on time and current is introduced to study its effect on Ra. This has been done by means of full factorial design (21 × 32) of experiments. A mathematical model has been developed for Ra by regression analysis and factor effects were analyzed using analysis of variance (ANOVA). Signal-to-noise ratio analysis is used to find the optimal condition.

  18. Refugees and Europe: a dilemma or a turning point?

    Directory of Open Access Journals (Sweden)

    Helgard Mahrdt

    2015-04-01

    Full Text Available Europe is facing a wave of refugees and migrants. To solve the many inherent problems is primarily a practical political task. However, there are existential experiences, democratic values, human attitudes, and political principles involved, and I am going to look particularly to the following three aspects of the refugee crisis, 1 the existential (I refer to the philosopher Martin Heidegger and to the political thinker Hannah Arendt, 2 the political (I turn to the EU’s steps for a common refugee policy, and 3 the legal (I refer to Immanuel Kant’s notion of hospitality and Seyla Benhabib’s notes on Human Rights. Finally, I will make a concluding remark on education’s task (I refer to Hannah Arendt’s and Aristotle’s notion of philia.

  19. Reducing surface roughness by optimising the turning parameters

    Directory of Open Access Journals (Sweden)

    Senthil Kumar, K.

    2013-08-01

    Full Text Available Modern manufacturers worldwide look for the cheapest quality-manufactured machined components to compete in the market. Good surface quality is desired for the proper functioning of the parts produced. The surface quality is influenced by the cutting speed, feed rate, depth of cut, and many other parameters. In this paper, the Taguchi method a powerful tool to design optimisation for quality is used to find the optimal machining parameters for the turning operation. An orthogonal array, the signal-to-noise (S/N ratio, and the analysis of variance (ANOVA are employed to investigate the machining characteristics of super duplex stainless steel bars using uncoated carbide cutting tools. The effect of machining parameters on surface roughness was discovered. Confirmation tests were conducted at optimal conditions to compare the experimental results with the predicted values.

  20. EXPERIMENTAL VALIDATION OF CUMULATIVE SURFACE LOCATION ERROR FOR TURNING PROCESSES

    Directory of Open Access Journals (Sweden)

    Adam K. Kiss

    2016-02-01

    Full Text Available The aim of this study is to create a mechanical model which is suitable to investigate the surface quality in turning processes, based on the Cumulative Surface Location Error (CSLE, which describes the series of the consecutive Surface Location Errors (SLE in roughing operations. In the established model, the investigated CSLE depends on the currently and the previously resulted SLE by means of the variation of the width of cut. The phenomenon of the system can be described as an implicit discrete map. The stationary Surface Location Error and its bifurcations were analysed and flip-type bifurcation was observed for CSLE. Experimental verification of the theoretical results was carried out.

  1. On the relaxation of magnetospheric convection when Bz turns northward

    Science.gov (United States)

    Kelley, M. C.

    2012-06-01

    The solar wind inputs considerable energy into the upper atmosphere, particularly when the interplanetary magnetic field (IMF) is southward. According to Poynting's theorem (Kelley, 2009), this energy becomes stored as magnetic fields and then is dissipated by Joule heat and by energizing the plasmasheet plasma. If the IMF turns suddenly northward, very little energy is transferred into the system while Joule dissipation continues. In this process, the polar cap potential (PCP) decreases. Experimentally, it was shown many years ago that the energy stored in the magnetosphere begins to decay with a time constant of two hours. Here we use Poynting's theorem to calculate this time constant and find a result that is consistent with the data.

  2. The Digital Turn in the French Audiovisual Model

    Directory of Open Access Journals (Sweden)

    Olivier Alexandre

    2016-07-01

    Full Text Available This article deals with the digital turn in the French audiovisual model. An organizational and legal system has evolved with changing technology and economic forces over the past thirty years. The high-income television industry served as the key element during the 1980s to compensate for a shifting value economy from movie theaters to domestic screens and personal devices. However, the growing competition in the TV sector and the rise of tech companies have initiated a disruption process. A challenged French conception copyright, the weakened position of TV channels and the scaling of content market all now call into question the sustainability of the French model in a digital era.

  3. Turned versus anodised dental implants: a meta-analysis.

    Science.gov (United States)

    Chrcanovic, B R; Albrektsson, T; Wennerberg, A

    2016-09-01

    The aim of this meta-analysis was to test the null hypothesis of no difference in the implant failure rates, marginal bone loss (MBL)and post-operative infection for patients being rehabilitated by turned versus anodised-surface implants, against the alternative hypothesis of a difference. An electronic search without time or language restrictions was undertaken in November 2015. Eligibility criteria included clinical human studies, either randomised or not. Thirty-eight publications were included. The results suggest a risk ratio of 2·82 (95% CI 1·95-4·06, P implants, when compared to anodised-surface implants. Sensitivity analyses showed similar results when only the studies inserting implants in maxillae or mandibles were pooled. There were no statistically significant effects of turned implants on the MBL (mean difference-MD 0·02, 95%CI -0·16-0·20; P = 0·82) in comparison to anodised implants. The results of a meta-regression considering the follow-up period as a covariate suggested an increase of the MD with the increase in the follow-up time (MD increase 0·012 mm year(-1) ), however, without a statistical significance (P = 0·813). Due to lack of satisfactory information, meta-analysis for the outcome 'post-operative infection' was not performed. The results have to be interpreted with caution due to the presence of several confounding factors in the included studies. © 2016 John Wiley & Sons Ltd.

  4. Turning the tide of public opinion on nuclear power

    International Nuclear Information System (INIS)

    Cohen, B.L.

    1997-01-01

    Until the early 1970s, the tide of public opinion in the United States was strongly in favor of nuclear power. New power plants were coming on line frequently, and in 1973-74, there were close to 40 new orders per year for new reactors in the United States. Official government projections estimated 1000 operating reactors by the year 2000. Fuel reprocessing, plutonium recycle, and breeder reactor development were also proceeding smoothly and rapidly. But, in the mid-1970s, the tide suddenly turned against the nuclear industry. How did this come about? In the late 1960s, energetic and idealistic young people who had never experienced economic insecurity or World Wars came of age. Environmentalism was an attractive outlet for their activity in most of the Western world. In the United States, opposition to the Vietnam War, in which these young people had a personal stake, was even more popular at first, but by the early 1970s, Vietnam was winding down, and they turned also to Environmentalism. Numerous environmental groups started up, aided heavily by the favorable connotation of the very word open-quotes environmentalistclose quotes in the public mind. Their organizational experience, political savvy, and media connections gained from their antiwar protests were powerful assets. But the groups needed specific targets to attack, and they soon found that nuclear power was well-suited for that purpose. Here was a new technology, coming on at a very rapid pace. To the public, radiation was highly mysterious, and people were well aware that it could be dangerous. And, the word danger had taken on a new meaning. Previous generations were well acquainted with death and were much less averse to risk-taking than the generation of the 1970s

  5. Determining u-turn adjustment factor for signalized intersections in Doha, Qatar

    Directory of Open Access Journals (Sweden)

    Hamad Khaled

    2017-01-01

    Full Text Available This paper summarizes the work conducted to estimating a U-turn adjustment factor at selected signalized intersections in Doha, Qatar. Unfortunately, the Highway Capacity Manual (HCM 2010 does not consider the effect of U-turn traffic on the capacity of signalized intersection; therefore, a few researchers attempted to develop U-turn adjustment factors to be added to the HCM analysis of signalized intersections when heavy U-turn traffic exists. To achieve this, the average headway was measured for U-tuning and left-turning vehicles at three different intersections in Doha. To estimate the U-turn adjustment factor, 198 queues with 2,327 U-turn vehicles and 1,564 left-turn vehicles were used to develop a regression model with the headway as the dependent variable and the U-turn percentage as the independent variable. The resulting quadratic model shows an increase in the average headway as the percentage of U-Turn traffic increases, with an R2 of 0.591. This indicates that the presence of U-turning vehicles has a significant effect on increasing the average headway thus reducing the capacity of signalized intersection. The result shows the U-Turn adjustment factor ranges from 0.76 for 100% of U-turn traffic to 0.95 for 10% of U-turn traffic.

  6. Pilot study: Assessing the effect of continual position monitoring technology on compliance with patient turning protocols

    OpenAIRE

    Schutt, Suann Cirigliano; Tarver, Christine; Pezzani, Michelle

    2017-01-01

    Abstract Aim The study aim was to evaluate if continual patient position monitoring, taking into account self‐turns and clinician‐assisted turns, would increase the percentage of time a patient's position changed at least every 2 hr. Background While patient turning has clinical benefits, current models to help staff remember to turn patients, such as “turn clocks” and timers, have not resulted in high compliance with turning protocols. In addition, reminders are based on arbitrary 2‐hr windo...

  7. Exploring interaction between a non-speaking boy using aided AAC and his everyday communication partners: features of turn organizing and turn design

    DEFF Research Database (Denmark)

    Pilesjö, Maja Sigurd; Rasmussen, Gitte

    2011-01-01

    This study investigates the practice of achieving common understanding in aided Augmentative and Alternative Communication (AAC). The aims are to explore whether communicative contributions can be described as turns, as defined in conversation analytic terms, and how then the contributions...... AAC, bliss symbolics. The analysis indicates that the participants can collaborately create and orient to units in interaction equivalent to turns in interaction although they differ dramatically from ordinary turns-at-talk. In order to capture the nature of the described units, the category turn...

  8. Stuck with/in a 'turn': Can we metaphorize better in Science and Technology Studies?

    Science.gov (United States)

    Vasileva, Bistra

    2015-06-01

    This contribution encourages loosening the cast-iron mould of the 'turn' metaphor that the practices of general and ontology-related turn-talking/making in Science and Technology Studies forge and fortify. Could framing novel themes and thinking in terms of 'turn' be as good as fettering? Not specific to the 'ontological turn' or 'turn to ontology', but haunting Science and Technology Studies across the board to signify supposed tidal change, the metaphor warrants dissection. Thus, this commentary expounds four distinct yet not unrelated versions of 'turn'--rotation, change of course/direction, change in general and occasion/opportunity to act--together with the worlds they beget. Then, the operation of these 'turns' in the debates on the 'ontological turn' is pursued. Enactments of the first three modes/moulds of 'turn', all entailing and tainted by the inexorable directedness of change the coupled 'turn to' framing imparts, either debunk or qualify the extent of the professed 'turn', with the effect of betraying its conceptual and methodological offerings. The fourth version, less substitutable with 'turn to' and thus less infected by intransigent directedness, escapes the rigidity that diminishes the value of ontology-minded studies. Clear of either a resolution to the debate or an alternative trope to cure the maladies of 'turn', the conclusion wishes to open space for pondering how to metaphorize more consciously and judiciously evolution and innovation in Science and Technology Studies.

  9. Prediction of Turn-Ends Based on Anticipation of Upcoming Words

    Science.gov (United States)

    Magyari, Lilla; de Ruiter, J. P.

    2012-01-01

    During conversation listeners have to perform several tasks simultaneously. They have to comprehend their interlocutor’s turn, while also having to prepare their own next turn. Moreover, a careful analysis of the timing of natural conversation reveals that next speakers also time their turns very precisely. This is possible only if listeners can predict accurately when the speaker’s turn is going to end. But how are people able to predict when a turn-ends? We propose that people know when a turn-ends, because they know how it ends. We conducted a gating study to examine if better turn-end predictions coincide with more accurate anticipation of the last words of a turn. We used turns from an earlier button-press experiment where people had to press a button exactly when a turn-ended. We show that the proportion of correct guesses in our experiment is higher when a turn’s end was estimated better in time in the button-press experiment. When people were too late in their anticipation in the button-press experiment, they also anticipated more words in our gating study. We conclude that people made predictions in advance about the upcoming content of a turn and used this prediction to estimate the duration of the turn. We suggest an economical model of turn-end anticipation that is based on anticipation of words and syntactic frames in comprehension. PMID:23112776

  10. Insulin reduces neuronal excitability by turning on GABA(A channels that generate tonic current.

    Directory of Open Access Journals (Sweden)

    Zhe Jin

    Full Text Available Insulin signaling to the brain is important not only for metabolic homeostasis but also for higher brain functions such as cognition. GABA (γ-aminobutyric acid decreases neuronal excitability by activating GABA(A channels that generate phasic and tonic currents. The level of tonic inhibition in neurons varies. In the hippocampus, interneurons and dentate gyrus granule cells normally have significant tonic currents under basal conditions in contrast to the CA1 pyramidal neurons where it is minimal. Here we show in acute rat hippocampal slices that insulin (1 nM "turns on" new extrasynaptic GABA(A channels in CA1 pyramidal neurons resulting in decreased frequency of action potential firing. The channels are activated by more than million times lower GABA concentrations than synaptic channels, generate tonic currents and show outward rectification. The single-channel current amplitude is related to the GABA concentration resulting in a single-channel GABA affinity (EC(50 in intact CA1 neurons of 17 pM with the maximal current amplitude reached with 1 nM GABA. They are inhibited by GABA(A antagonists but have novel pharmacology as the benzodiazepine flumazenil and zolpidem are inverse agonists. The results show that tonic rather than synaptic conductances regulate basal neuronal excitability when significant tonic conductance is expressed and demonstrate an unexpected hormonal control of the inhibitory channel subtypes and excitability of hippocampal neurons. The insulin-induced new channels provide a specific target for rescuing cognition in health and disease.

  11. Ares I-X Malfunction Turn Range Safety Analysis

    Science.gov (United States)

    Beaty, J. R.

    2011-01-01

    Ares I-X was the designation given to the flight test version of the Ares I rocket which was developed by NASA (also known as the Crew Launch Vehicle (CLV) component of the Constellation Program). The Ares I-X flight test vehicle achieved a successful flight test on October 28, 2009, from Pad LC-39B at Kennedy Space Center, Florida (KSC). As part of the flight plan approval for the test vehicle, a range safety malfunction turn analysis was performed to support the risk assessment and vehicle destruct criteria development processes. Several vehicle failure scenarios were identified which could have caused the vehicle trajectory to deviate from its normal flight path. The effects of these failures were evaluated with an Ares I-X 6 degrees-of-freedom (6-DOF) digital simulation, using the Program to Optimize Simulated Trajectories Version II (POST2) simulation tool. The Ares I-X simulation analysis provided output files containing vehicle trajectory state information. These were used by other risk assessment and vehicle debris trajectory simulation tools to determine the risk to personnel and facilities in the vicinity of the launch area at KSC, and to develop the vehicle destruct criteria used by the flight test range safety officer in the event of a flight test anomaly of the vehicle. The simulation analysis approach used for this study is described, including descriptions of the failure modes which were considered and the underlying assumptions and ground rules of the study.

  12. The Development of Philosophy and Its Fundamental Informational Turn

    Directory of Open Access Journals (Sweden)

    Kun Wu

    2015-10-01

    Full Text Available Through the rescientification of philosophy and the philosophization of science, an entirely new concept of science and philosophy as part of general human knowledge is developing. In this concept, science and philosophy become intrinsically integrated and unified, forming dynamic feedback-loops which lead to further mutual transformation and integration. This development is taking place in the face of two kinds of dogmatism: one is naturalistic dogmatism, the other the dogmatism of consciousness philosophy. These two kinds of dogmatism are an inevitable consequence of the method of segmentation of the field of existence in traditional philosophy namely: existence = matter + Spirit (mind. The development of the Science and Philosophy of Information reveals a world of information-by-itself lying between the worlds of matter and Sprit, and re-interprets the essence of the Spiritual world in the sense of prior information activities. Accordingly, we can describe the movements from matter to Spirit, and from Spirit to matter in these activities as processes, eliminating their dualistic separation, and achieve an informational turn in philosophy, the first truly fundamental one.

  13. Brokdorf - the symbol for a political turning-point

    International Nuclear Information System (INIS)

    Aust, S.

    1981-01-01

    Brokdorf - this spot in the North of the F.R. of Germany designates a front which is no longer the only place where the argument of 'yes' or 'no' to nuclear energy is discussed. The citizens have lost their confidence in the competence of those governing, some concerns have betrayed them, politicians have lied, and the sufficiently-known German shortsightedness has kept up celebrating tradition - this is what has happened during the seven years' war about the Brokdorf nuclear power plant. For even without nuclear power the lights won't go out and the unemployment figures will not increase. In the meantime the heavy protests of environmentally-minded citizens against an industrial power which is solely orientated towards competition has seized all strata of our society. Now, since a handful of politicians are also timidly beginning to refuse to submit themselves to the alleged forces underlying the existing circumstances, the conflict between big industry and governmental power is programmed at least as far as topics of energy policy are concerned. A political turning-point. Or does the atomic state show its teeth because it is afraid of the democratic formation of a common will of those who it used to consider as an incapacitated herd of voters. (orig.) [de

  14. The Democratic Turn in the Secularism-Religion Debate

    Directory of Open Access Journals (Sweden)

    Diego Bermejo

    2017-11-01

    Full Text Available The revival of the religion in the new context of a global world-society, which is as modern as religious, doesn´t happen only as a sociological result of the dismantling of the postcolonial world –which denies the secularist forecast of the religion decline and provides the pluralism phenomenon with an unthought-of ethical and political complexity and virtuality– , but as a result of the modern reason crisis too, that makes reason rationally unable to justify political life relying on a rationalist ethical monism. The rationalist last foundation crisis affects as much the fundamentalist religious claims –which pretend to interpret the so called “religion resurgence or religion revival” in a “postsecular society” in a rapidly triumphal way, as the secularist claims which pretend to deny the religion any ethical and political virtuality in the public sphere. The democratic turn, antiauthoritarian and antidogmatic, coherently demanded within the context of the modern reason crisis by three well-known representatives of the postmetaphysical, hermeneutical and pragmatist philosophy, such as Vattimo, Habermas and Rorty, replaces the debate between secularism and religion on the basis of true questions with the other on the basis of solidarity questions.

  15. Swine manure composting by means of experimental turning equipment.

    Science.gov (United States)

    Chiumenti, A; Da Borso, F; Rodar, T; Chiumenti, R

    2007-01-01

    The purpose of research was to test the effectiveness of a prototype of a turning machine and to evaluate the feasability of a farm-scale composting process of the solid fraction of swine manure. A qualitative evaluation of the process and final product was made by monitoring the following parameters: process temperature, oxygen concentration inside the biomass, gaseous emissions (CH4, CO2, NH3, N2O), respiration index, humification index, total and volatile solids, carbon and nitrogen, pH and microbial load. The prototype proved to be very effective from a technical-operational point of view. The composting process exhibited a typical time-history, characterised by a thermophilic phase followed by a curing phase [Chiumenti, A., Chiumenti, R., Diaz, L.F., Savage, G.M., Eggerth, L.L., Goldstein, N., 2005. Modern Composting Technologies. BioCycle-JG Press, Emmaus, PA, USA]. Gas emissions from compost the windrow were more intense during the active phase of the process and showed a decreasing trend from the thermophilic to the curing phase. The final compost was characterized by good qualitative characteristics, a significant level of humification [Rossi, L., Piccinini, S., 1999. La qualità agronomica dei compost derivanti da liquami suinicoli. (Agronomic quality of swine manure compost). L'informatore Agrario 38, 29-31] and no odor emissions. This method of managing manure represents an effective, low cost approach that could be an interesting opportunity for swine farms.

  16. [Adult health problems and coping at life turning points].

    Science.gov (United States)

    Lee, Sheuan; Lu, Ying-Chi; Yen, Wen-Jiuan; Lin, Shu-Chin

    2004-02-01

    At important life turning points, middle-aged adults face many physiological changes (e.g., aging, changes in hormone levels) and alterations in family structure (e.g., children growing up and leaving home). In addition to facing these changes and their impacts, adults must also take on challenges in terms of self-concept, body image, life goals, and life meaning. Illnesses that commonly occur during this life stage include menopausal depression, substance abuse, and anxiety. Traditional treatment models are medical-oriented, but curative effects are limited and hospital visits still occur at high frequencies, resulting in increased medical expenses and disruptions in family life. The authors review the current literature on curative models in this area, and discuss the potential of a combination of physical therapy, cognitive, and existential-humanistic therapy to improve patients' physical strength, self-concept, self-esteem, and self-confidence in an effort to overcome physio-psycho-social disorders and to increase vitality.

  17. Turning Perspective in Photoelectrocatalytic Cells for Solar Fuels.

    Science.gov (United States)

    Perathoner, Siglinda; Centi, Gabriele; Su, Dangsheng

    2016-02-19

    The development of new devices for the use and storage of solar energy is a key step to enable a new sustainable energy scenario. The route for direct solar-to-chemical energy transformation, especially to produce liquid fuels, represents a necessary element to realize transition from the actual energy infrastructure. Photoelectrocatalytic (PECa) devices for the production of solar fuels are a key element to enable this sustainable scenario. The development of PECa devices and related materials is of increasing scientific and applied interest. This concept paper introduces the need to turn the viewpoint of research in terms of PECa cell design and related materials with respect to mainstream activities in the field of artificial photosynthesis and leaves. As an example of a new possible direction, the concept of electrolyte-less cell design for PECa cells to produce solar fuels by reduction of CO2 is presented. The fundamental and applied development of new materials and electrodes for these cells should proceed fully integrated with PECa cell design and systematic analysis. A new possible approach to develop semiconductors with improved performances by using visible light is also shortly presented. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  18. The German energetic turning point: year n+2

    International Nuclear Information System (INIS)

    Cruciani, Michel

    2013-07-01

    This publication proposes an analysis of the evolution of the German energy sector, two years after the adoption of a new energy policy. It notably aims at identifying the consequences of this important turning point which was characterised by the decision to phase out nuclear while keeping on reducing energy consumption and greenhouse gas emissions, and developing renewable energies. In a first part, the author comments the objectives associated with the present evolution in terms of reducing the primary energy consumption, reducing raw electric power consumption, energy consumption in transports, CO 2 emissions, of increasing the share of renewable energies and power production from renewable sources, and of complying with European objectives. The second part discusses technical aspects of the development of power generation from renewable sources by addressing the following issues: prospective, grid extension and strengthening, intermittency management, industrial orientation. The third part addresses economic aspects of this development: promotion of electricity production from renewable sources, relationship between power generation from renewable sources and electricity price, public debate on electricity price, employment and economic benefits, financing the energy transition, and the European dimension. In conclusion, the author discusses whether the German energy shift is a model or a counter-example

  19. Left-Turning Vehicle Trajectory Modeling and Guide Line Setting at the Intersection

    Directory of Open Access Journals (Sweden)

    Fulu Wei

    2014-01-01

    Full Text Available When left-turning vehicles are released from the multiple left-turning lanes at the signalized intersection, there will be conflicts among them, and the conflicts will affect the traffic operation and safety. In order to solve the problem, by extracting running trajectories of left-turning vehicles and analyzing distribution characteristics of trajectories, velocity changing characteristics, and flow changing characteristics, the left-turning vehicle’s trajectory model was established. On the basis of the above research, taking an example of quadruple left-turning lanes, the idea of setting left-turning guide line at the intersection was proposed. Through instance verification, we could get the conclusion that the method of using left-turning guide line to control vehicles’ turning process can effectively reduce traffic conflicts and delay and improve traffic efficiency.

  20. The Children's Inn at NIH turns 25 | NIH MedlinePlus the Magazine

    Science.gov (United States)

    ... of this page please turn JavaScript on. Feature: The Children's Inn The Children's Inn at NIH turns 25 Past Issues / ... home …" for all families! What to Expect at The Children's Inn The Children's Inn enhances opportunities for ...

  1. 46 CFR 148.04-13 - Ferrous metal borings, shavings, turnings, or cuttings (excluding stainless steel).

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 5 2010-10-01 2010-10-01 false Ferrous metal borings, shavings, turnings, or cuttings... Requirements for Certain Material § 148.04-13 Ferrous metal borings, shavings, turnings, or cuttings (excluding... described as ferrous metal borings, shavings, turnings, or cuttings on board vessels (excluding stainless...

  2. The performative turn at Inhotim: installation art and Baudelairean modernity

    Directory of Open Access Journals (Sweden)

    Lauren S. Weingarden

    2013-12-01

    Full Text Available This article explores the participatory turn in installation art as part of a trajectory from Baudelairean modernity to twentyfirst-century postmodernity, as represented at Inhotim, the outdoor contemporary art museum and botanical gardens in Brumadinho, MG. In his 1862 essay “The Painter of ModernLife,” Charles Baudelaire defined modernity as fleeting, transitory and fragmentary. Baudelairean modernity initiated a breakdown of boundaries between art and life and between high art aesthetics and popular culture, which continues in the work of installation artists. In the sites of installation art, the spectator is compelled to extend – rather than complete – the work of art in his/her own time, prior experiential encounters and transformative after thoughts.The shift from the isolated work of art to the experiential one notonly complicates how and where works of art are viewed, but also radicalizes the materials that constitute the work of art – whether those materials are extracted from the quotidian sphere or complex technologies, each undergoes a process of defamiliarization and reactivation to produce the transformative aesthetic experience.The individual installations in Inhotim’s “outdoor museum” engage the spectator in a dynamic/participatory experience with spatial,temporal and material relationships that define the very essence of art’s reciprocity, or contrast with the natural and man-madeworlds. It is the rarefied setting of Inhotim’s botanical gardens that makes the participatory and transformative experience central to the aesthetic encounter with installation art.

  3. Neutrophils Turn Plasma Proteins into Weapons against HIV-1.

    Directory of Open Access Journals (Sweden)

    Cornelia Speth

    Full Text Available As a consequence of innate immune activation granulocytes and macrophages produce hypochlorite/hypochlorous acid (HOCl via secretion of myeloperoxidase (MPO to the outside of the cells, where HOCl immediately reacts with proteins. Most proteins that become altered by this system do not belong to the invading microorganism but to the host. While there is no doubt that the myeloperoxidase system is capable of directly inactivating HIV-1, we hypothesized that it may have an additional indirect mode of action. We show in this article that HOCl is able to chemically alter proteins and thus turn them into Idea-Ps (Idea-P = immune defence-altered protein, potent amyloid-like and SH-groups capturing antiviral weapons against HIV-1. HOCl-altered plasma proteins (Idea-PP have the capacity to bind efficiently and with high affinity to the HIV-1 envelope protein gp120, and to its receptor CD4 as well as to the protein disulfide isomerase (PDI. Idea-PP was able to inhibit viral infection and replication in a cell culture system as shown by reduced number of infected cells and of syncytia, resulting in reduction of viral capsid protein p24 in the culture supernatant. The unmodified plasma protein fraction had no effect. HOCl-altered isolated proteins antithrombin III and human serum albumin, taken as representative examples of the whole pool of plasma proteins, were both able to exert the same activity of binding to gp120 and inhibition of viral proliferation. These data offer an opportunity to improve the understanding of the intricacies of host-pathogen interactions and allow the generation of the following hypothetical scheme: natural immune defense mechanisms generate by posttranslational modification of plasma proteins a potent virucidal weapon that immobilizes the virus as well as inhibits viral fusion and thus entry into the host cells. Furthermore simulation of this mechanism in vitro might provide an interesting new therapeutic approach against

  4. Neutrophils Turn Plasma Proteins into Weapons against HIV-1.

    Science.gov (United States)

    Speth, Cornelia; Brodde, Martin F; Hagleitner, Magdalena; Rambach, Günter; Van Aken, Hugo; Dierich, Manfred; Kehrel, Beate E

    2013-01-01

    As a consequence of innate immune activation granulocytes and macrophages produce hypochlorite/hypochlorous acid (HOCl) via secretion of myeloperoxidase (MPO) to the outside of the cells, where HOCl immediately reacts with proteins. Most proteins that become altered by this system do not belong to the invading microorganism but to the host. While there is no doubt that the myeloperoxidase system is capable of directly inactivating HIV-1, we hypothesized that it may have an additional indirect mode of action. We show in this article that HOCl is able to chemically alter proteins and thus turn them into Idea-Ps (Idea-P = immune defence-altered protein), potent amyloid-like and SH-groups capturing antiviral weapons against HIV-1. HOCl-altered plasma proteins (Idea-PP) have the capacity to bind efficiently and with high affinity to the HIV-1 envelope protein gp120, and to its receptor CD4 as well as to the protein disulfide isomerase (PDI). Idea-PP was able to inhibit viral infection and replication in a cell culture system as shown by reduced number of infected cells and of syncytia, resulting in reduction of viral capsid protein p24 in the culture supernatant. The unmodified plasma protein fraction had no effect. HOCl-altered isolated proteins antithrombin III and human serum albumin, taken as representative examples of the whole pool of plasma proteins, were both able to exert the same activity of binding to gp120 and inhibition of viral proliferation. These data offer an opportunity to improve the understanding of the intricacies of host-pathogen interactions and allow the generation of the following hypothetical scheme: natural immune defense mechanisms generate by posttranslational modification of plasma proteins a potent virucidal weapon that immobilizes the virus as well as inhibits viral fusion and thus entry into the host cells. Furthermore simulation of this mechanism in vitro might provide an interesting new therapeutic approach against microorganisms.

  5. Project U-Turn: increasing active transportation in Jackson, Michigan.

    Science.gov (United States)

    TenBrink, David S; McMunn, Randall; Panken, Sarah

    2009-12-01

    Jackson, Michigan, is a medium-sized city suffering from a bad economy and obesity-related health issues. Nearly 20% of the 36,000 residents live below the poverty line. It is a relatively young city (median age of 30 years) with a mixed ethnicity (20% black, 73% white, 4% Hispanic). The city offers many structured, active recreational opportunities, but has not integrated physical activity into daily life. Project U-Turn aimed to increase active transportation (e.g., biking, walking, and transit use) through an integrated approach to Active Living by Design's community action model and the Michigan Safe Routes to School model. Resources were focused on active living promotions and programs; partnership meetings were the source of changes in policy and physical projects. Each initiative was designed to introduce each of the 5Ps (preparation, promotion, programs, policy, and physical projects) to build support for the partnership's overall work. The partnership collected snapshot data of community walking and biking behavior, percentage of students walking to school, participation in events and programs, and new physical projects. Jackson saw a vast improvement in physical infrastructure and policy and a related increase in walking and biking in the community. The project engaged in purposeful partnership building to implement effective programs and promotions that built support for policy and physical projects. Limited resources were best used by encouraging partners to contribute and coordinate activities using existing staff, funding, and resources. Jackson has seen a shift toward awareness of the benefits of active living on community health, economic development, and environmental awareness.

  6. Housing the "Other" Half: American Studies' Global Urban Turn

    Directory of Open Access Journals (Sweden)

    David Faflik

    2010-03-01

    Full Text Available

    Over the course of its short lifetime, the discipline of American studies has utilized a series of self-defining metaphors. With each successive paradigm shift in the field, each of these disciplinary figures, in turn, has been found wanting, and so replaced. American studies’ current, if not consensual, metaphor—the “border”—resembles not a few of its predecessors in that it is spatial in nature and effectively doubles as a figuration of the greater nation. The premise of this paper is that the “border,” like the figures that came before it, has outlived its serviceable purpose for a discipline that continues to evolve.

    This essay proposes the global city, or, more accurately, the global slum, as a post-“border” metaphor peculiarly adapted to the principled transnationalism that now defines American studies for many subscribing students and professionals. On the one hand, the urban has become a prevailing demographic fact in this, the new century. Thus, the multiethnic, multinational world metropolis recommends itself as a more-than-metaphor for the dynamic cultural contact that typifies ascendant hemispheric conceptions of the Americas. On the other hand, the figure of the peripheral city similarly, and spatially, evokes the majority “center” and minority “margin” model of American studies that critics would claim inhibits total global integration among the discipline’s geoculturally diverse practitioners, many of whom reside outside the continental United States. This essay conceptually deploys the world city to explore beyond these professional/territorial “borders.” Its three condensed case studies—first, of Gilded Age Manhattan, second, of the modern Turkish metropolis, and third, of a reunified Germany’s ethnic ghetto—constitute a brisk figurative exercise in “marginal” urban migration, wherein resides an alternate model, and metaphor, of American studies praxis today.

  7. Aerodynamic drag modeling of alpine skiers performing giant slalom turns.

    Science.gov (United States)

    Meyer, Frédéric; Le Pelley, David; Borrani, Fabio

    2012-06-01

    Aerodynamic drag plays an important role in performance for athletes practicing sports that involve high-velocity motions. In giant slalom, the skier is continuously changing his/her body posture, and this affects the energy dissipated in aerodynamic drag. It is therefore important to quantify this energy to understand the dynamic behavior of the skier. The aims of this study were to model the aerodynamic drag of alpine skiers in giant slalom simulated conditions and to apply these models in a field experiment to estimate energy dissipated through aerodynamic drag. The aerodynamic characteristics of 15 recreational male and female skiers were measured in a wind tunnel while holding nine different skiing-specific postures. The drag and the frontal area were recorded simultaneously for each posture. Four generalized and two individualized models of the drag coefficient were built, using different sets of parameters. These models were subsequently applied in a field study designed to compare the aerodynamic energy losses between a dynamic and a compact skiing technique. The generalized models estimated aerodynamic drag with an accuracy of between 11.00% and 14.28%, and the individualized models estimated aerodynamic drag with an accuracy between 4.52% and 5.30%. The individualized model used for the field study showed that using a dynamic technique led to 10% more aerodynamic drag energy loss than using a compact technique. The individualized models were capable of discriminating different techniques performed by advanced skiers and seemed more accurate than the generalized models. The models presented here offer a simple yet accurate method to estimate the aerodynamic drag acting upon alpine skiers while rapidly moving through the range of positions typical to turning technique.

  8. What can be seen beyond the turning points?

    International Nuclear Information System (INIS)

    Morita, Koji

    1997-01-01

    LNG markets in Asia has faced turning points in 1990s. There is sluggish growth of Japanese demand, rapid demand growth of Korea and Taiwan, and increase of dependency on the Middle East. Will these situation continue after 2000? In Japan, energy demand will grow steadily, and development of nuclear power stations will not proceed without difficulty. Considering the emission of carbon dioxide, LNG demand will expand more than the Government outlook of 68 ∼ 60 mil. tons in 2010. IEEJ (Institute of Energy Economics Japan) forecasts that it will come to 58 mil. tons in 2010, including 1 ∼ 2 mil. tons of indigenous production. Korea secured two LNG projects newly, Ras Laffan (Qatar) and Oman. Considering the secured volume, LNG consumption will continue to expand even after 2000. But thinking of the lesser population of 21 mil. and warm climate of Taiwan, the extent of LNG demand expansion may not be so large. Big unknown factors exist in Asia: China and India. Their large population can give a great influence on LNG market in Asia. Several gas-fired power projects by IPP are already being planned. According to the Indian Government, as annual production capacity of natural gas is limited, more than 40 bil. m 3 must be fulfilled by import in 2005. Some indicators of China, GDP, energy consumption and so on, are saying that Shanghai and some cities may have already prepared conditions to introduce LNG. They may begin to utilize LNG by taking surplus of existing LNG projects in the later half of 2000s. (LN)

  9. Kinematical Comparison of the 200 m Backstroke Turns between National and Regional Level Swimmers.

    Science.gov (United States)

    Veiga, Santiago; Cala, Antonio; Frutos, Pablo González; Navarro, Enrique

    2013-01-01

    The aims of this investigation were to determine the evolution of selected turn variables during competitive backstroke races and to compare these kinematic variables between two different levels of swimmers. Sixteen national and regional level male swimmers participant in the 200 m backstroke event at the Spanish Swimming Championships in short course (25 m) were selected to analyze their turn performances. The individual distances method with two-dimensional Direct Linear Transformation (2D-DLT) algorithms was used to perform race analyses. National level swimmers presented a shorter "turn time", a longer "distance in", a faster "underwater velocity" and "normalized underwater velocity", and a faster "stroking velocity" than regional level swimmers, whereas no significant differences were detected between levels for the "underwater distance". National level swimmers maintained similar "turn times" over the event and increased "underwater velocity" and "normalized underwater velocity" in the last (seventh) turn segment, whereas regional level swimmers increased "turn time" in the last half of the race. For both national and regional level swimmers, turn "underwater distance" during the last three turns of the race was significantly shorter while no significant differences in distance into the wall occurred throughout the race. The skill level of the swimmers has an impact on the competitive backstroke turn segments. In a 200 m event, the underwater velocity should be maximized to maintain turn proficiency, whereas turn distance must be subordinated to the average velocity. Key PointsThe underwater turn velocity is as a critical variable related to the swimmers' level of skill in a 200 m backstroke event.Best swimmers perform faster but no longer turn segments during a 200 m backstroke event.Best swimmers maintain their turn performance throughout the 200 m backstroke event by increasing the underwater velocity during the final part of the race.The turn distance

  10. Equivalent properties of single event burnout induced by different sources

    International Nuclear Information System (INIS)

    Yang Shiyu; Cao Zhou; Da Daoan; Xue Yuxiong

    2009-01-01

    The experimental results of single event burnout induced by heavy ions and 252 Cf fission fragments in power MOSFET devices have been investigated. It is concluded that the characteristics of single event burnout induced by 252 Cf fission fragments is consistent to that in heavy ions. The power MOSFET in the 'turn-off' state is more susceptible to single event burnout than it is in the 'turn-on' state. The thresholds of the drain-source voltage for single event burnout induced by 173 MeV bromine ions and 252 Cf fission fragments are close to each other, and the burnout cross section is sensitive to variation of the drain-source voltage above the threshold of single event burnout. In addition, the current waveforms of single event burnouts induced by different sources are similar. Different power MOSFET devices may have different probabilities for the occurrence of single event burnout. (authors)

  11. Analyses of quenching process during turn-off of plasma electrolytic carburizing on carbon steel

    Energy Technology Data Exchange (ETDEWEB)

    Wu, Jie; Liu, Run [Key Laboratory for Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Beijing Radiation Center, Beijing 100875 (China); Xue, Wenbin, E-mail: xuewb@bnu.edu.cn [Key Laboratory for Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Beijing Radiation Center, Beijing 100875 (China); Wang, Bin; Jin, Xiaoyue; Du, Jiancheng [Key Laboratory for Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Beijing Radiation Center, Beijing 100875 (China)

    2014-10-15

    Highlights: • Cooling rate of carburized steel at the end of PEC treatment is measured. • The quench hardening in the fast or slow turn-off mode hardly takes place. • Decrease of the surface roughness during slow turn-off process is found. • A slow turn-off mode is recommended to replace the conventional turn-off mode. - Abstract: Plasma electrolytic carburizing (PEC) under different turn-off modes was employed to fabricate a hardening layer on carbon steel in glycerol solution without stirring at 380 V for 3 min. The quenching process in fast turn-off mode or slow turn-off mode of power supply was discussed. The temperature in the interior of steel and electron temperature in plasma discharge envelope during the quenching process were evaluated. It was found that the cooling rates of PEC samples in both turn-off modes were below 20 °C/s, because the vapor film boiling around the steel sample reduced the cooling rate greatly in terms of Leidenfrost effect. Thus the quench hardening hardly took place, though the slow turn-off mode slightly decreased the surface roughness of PEC steel. At the end of PEC treatment, the fast turn-off mode used widely at present cannot enhance the surface hardness by quench hardening, and the slow turn-off mode was recommended in order to protect the electronic devices against a large current surge.

  12. The Timed 180° Turn Test for Assessing People with Hemiplegia from Chronic Stroke

    Directory of Open Access Journals (Sweden)

    Regan L. Robinson

    2018-01-01

    Full Text Available Background. Turning is ubiquitous in activities of daily living. For people with hemiplegia, persistent impairments in strength, balance, and coordination will affect their ability to turn safely. Consequently, turning retraining should be addressed in rehabilitation programs. To measure turning for these individuals, a reliable clinical tool is required. Objective. To investigate (i the intrarater, interrater, and test-retest reliability of the timed 180° turn test; (ii the correlation of the timed 180° turn test with other measures of stroke-specific impairments; and (iii the cut-off time that best discriminates individuals with hemiplegia from chronic stroke and healthy older adults. Methods. 33 individuals with hemiplegia due to chronic stroke and 32 healthy elderly individuals participated in this cross-sectional study. The timed 180° turn test was administered along with other measures of stroke-specific impairment. Results. The timed 180° turn test demonstrated excellent intrarater, interrater, and test-retest reliability in individuals with hemiplegia from chronic stroke. The timed 180° turn test (times significantly correlated with the Fugl-Meyer Assessment of the Lower Extremities (FMA-LE, affected ankle plantar flexion strength, the 5-Times-Sit-To-Stand test, the Berg Balance Scale (BBS, and the Timed Up and Go (TUG test. Conclusion. The timed 180° turn test is a reliable clinical tool to assess the turning ability of subjects with hemiplegia from chronic stroke.

  13. Who is turning the patients? A survey study.

    Science.gov (United States)

    Voz, Anita; Williams, Carol; Wilson, Marian

    2011-01-01

    This study sought to establish if nurses at a community hospital could correctly identify patients at high risk for skin breakdown and determine whether the resources needed to reposition high-risk patients per protocol were available. The sample comprised 101 registered nurses from 8 acute care units in a 246-bed community-owned district Magnet® hospital. The study facility serves patients from a wide geographic area in the "panhandle" of Idaho with a largely rural population. Face-to-face interviews were conducted on all shifts for 4 days. The instrument consisted of demographic questions and patient assignment questions including which patients the nurse identified at high risk for skin breakdown, which patients the nurse received information on about skin risks at change of shift, whether the nurse knew the Norton Pressure Ulcer Scale scores for their patients, whether patients were repositioned, who performed the repositioning, and how many times that shift. Surveyors obtained patients' Norton scores from computer records and recorded whether the nurse correctly identified patients at high-risk for skin breakdown. Most nurses (73%) stated they did not know their patients' Norton scores. About 60% of nurses reported turning their high-risk patients every 2 to 4 hours. The repositioning was completed most often by RNs alone (39%), RN and CNA (36%), and by patients themselves (35%). Reasons for not repositioning included the following: allowed to sleep, off unit, patient refused, not enough time, family refused, pain, not enough help, and patient receiving end-of-life care. Assessment of patient's skin risk status was correct in 232 out of 348 patients (66%). Nurses predicted high risk when the Norton score indicated low risk in 35.9% of patients and low risk when the Norton scale indicated high risk in 35.1%. Nurses reported receiving information about skin risk in 33% of their assigned patients. Nurses reported adequate resources to reposition patients. Most

  14. Single-instruction multiple-data execution

    CERN Document Server

    Hughes, Christopher J

    2015-01-01

    Having hit power limitations to even more aggressive out-of-order execution in processor cores, many architects in the past decade have turned to single-instruction-multiple-data (SIMD) execution to increase single-threaded performance. SIMD execution, or having a single instruction drive execution of an identical operation on multiple data items, was already well established as a technique to efficiently exploit data parallelism. Furthermore, support for it was already included in many commodity processors. However, in the past decade, SIMD execution has seen a dramatic increase in the set of

  15. Biomechanical Evaluation of a Bed Feature to Assist in Turning and Laterally Repositioning Patients.

    Science.gov (United States)

    Wiggermann, Neal

    2016-08-01

    This study investigated the effects of hospital bed features on the biomechanical stresses experienced by nurses when turning and laterally repositioning patients. Turn Assist, a common feature in ICU beds that helps to rotate patients, and side rail orientation were evaluated. Manual patient handling is a risk factor for musculoskeletal injury, and turning patients is one of the most common patient handling activities. No known studies have evaluated bed attributes such as the Turn Assist feature and side rail orientation that may affect the stresses experienced by the nurse. Nine female nurses laterally repositioned and turned a 63-kg and 123-kg subject on an ICU bed while motion capture, ground reaction forces, and hand force data were recorded. Loading of the spine and shoulder was modeled using 3D Static Strength Prediction Program (3DSSPP). Spine compression and shear forces did not exceed recommended limits when turning or laterally repositioning. However, the mean pull forces required to manually laterally reposition even the 63-kg subject was 340 Newtons, more than 50% greater than limits established in psychophysical testing. Turn Assist considerably reduced spine loading and pull forces for both turning and laterally repositioning. Lowering side rails reduced spinal compression by 11% when turning patients. Laterally repositioning patients as part of turning may pose an injury risk to caregivers. Turn Assist reduces physical loading on nurses when turning and repositioning patients. Caregivers should consider using Turn Assist and other aids such as mechanical lifts or sliding sheets especially when turning patients requires lateral repositioning. © 2015, Human Factors and Ergonomics Society.

  16. ω-Turn: a novel β-turn mimic in globular proteins stabilized by main-chain to side-chain C−H···O interaction.

    Science.gov (United States)

    Dhar, Jesmita; Chakrabarti, Pinak; Saini, Harpreet; Raghava, Gajendra Pal Singh; Kishore, Raghuvansh

    2015-02-01

    Mimicry of structural motifs is a common feature in proteins. The 10-membered hydrogen-bonded ring involving the main-chain C − O in a β-turn can be formed using a side-chain carbonyl group leading to Asx-turn. We show that the N − H component of hydrogen bond can be replaced by a C(γ) -H group in the side chain, culminating in a nonconventional C − H···O interaction. Because of its shape this β-turn mimic is designated as ω-turn, which is found to occur ∼ three times per 100 residues. Three residues (i to i + 2) constitute the turn with the C − H···O interaction occurring between the terminal residues, constraining the torsion angles ϕi + 1, ψi + 1, ϕi + 2 and χ'1(i + 2) (using the interacting C(γ) atom). Based on these angles there are two types of ω-turns, each of which can be further divided into two groups. C(β) -branched side-chains, and Met and Gln have high propensities to occur at i + 2; for the last two residues the carbonyl oxygen may participate in an additional interaction involving the S and amino group, respectively. With Cys occupying the i + 1 position, such turns are found in the metal-binding sites. N-linked glycosylation occurs at the consensus pattern Asn-Xaa-Ser/Thr; with Thr at i + 2, the sequence can adopt the secondary structure of a ω-turn, which may be the recognition site for protein modification. Location between two β-strands is the most common occurrence in protein tertiary structure, and being generally exposed ω-turn may constitute the antigenic determinant site. It is a stable scaffold and may be used in protein engineering and peptide design. © 2014 Wiley Periodicals, Inc.

  17. Focus of population conference is turning to women.

    Science.gov (United States)

    Struck, D

    1994-09-05

    The empowerment of women is emerging as a central theme at the 1994 International Conference on Population and Development. A representative of the United Nations Development Fund for Women, Roxanna Carrillo, notes, "For the first time, the United Nations and the world is now working with women. Every single population policy in the last 30 years has failed because it wasn't done with participation of women." Concern has been expressed, however, that this emphasis on women's issues will shift attention from broader population issues and alienate participants from male-dominated Third World countries. Muslim Fundamentalists, for example, believe that all family planning decisions should be made by the husband. Even if a women's agenda is adopted, female delegates face the task of ensuring that governments follow though on its implementation.

  18. Effect of number of turns on railgun performance

    International Nuclear Information System (INIS)

    Shrader, J.E.

    1984-01-01

    Boeing is developing railguns for hypervelocity impact studies using capacitors as a power source. The design goals are to maximize the mass accelerated to 5 km/s, and to minimize the cost per shot for a given amount of initial energy. Two capacitor banks are being employed, both using 170 x 10/sub -6f/ capacitors. One bank consists of 90 capacitors with a maximum energy of 190kJ, the other bank consists of 800 capacitors with a maximum energy of 1.3MJ. The small bank is configured as a lumped constant delay line to produce a more nearly flat topped current pulse than a single element LC source

  19. The "symmetrical turn" in the study of colective action

    Directory of Open Access Journals (Sweden)

    Israel Rodríguez Giralt

    2008-11-01

    Full Text Available Conceptualising and understanding forms of collective action is one of the historic preoccupations of social thought. Good evidence of this can be found in the long line of disputes and polemics that runs through the history of thought about these social phenomena. It shows the difficulty social sciences have faced, and continue to face, when it comes to defining, explaining and delineating a phenomena as ephemeral and liminal as this one.In this context, I propose that a discussion of the implications an STS focus could have for the analysis of contemporary collective action. The main hypothesis I develop states that the conceptual and methodological baggage that goes with the Actor-Network theory (ANT, and its shaping into what has been called the 'symmetrical turn' in the social sciences, become a fundamental resource for renewing and enriching the analysis of collective action. For this, I will bring together two main contributions: its alternative understanding of social action (to explain the social it is necessary to  leave the exclusive concern with social relations aside and take into account the non-human actors, such as the technical procedures in which they are involved; and its original definition of the “collective” (the collective is basically an aggregate of humans and non-humans, without predefined borders, it is just the relational product created by the constant and precarious commitment between heterogeneous elements. Both contributions, I affirm, allow the opening of an interesting discussion about agency and the possibility of articulating a new theory of collective action that differs from the dominant traditions in that it considers and assumes the heterogeneous and relational character of all social actors, and, as such, it also assumes that all social action is the emergent effect, the interactive product of those hybrid collectives in action. To give an example of the fertility of this approach, I focus on an

  20. Kinetic analysis of ski turns based on measured ground reaction forces.

    Science.gov (United States)

    Vaverka, Frantisek; Vodickova, Sona; Elfmark, Milan

    2012-02-01

    The objective of this study was to devise a method of kinetic analysis of the ground reaction force that enables the durations and magnitudes of forces acting during the individual phases of ski turns to be described exactly. The method is based on a theoretical analysis of physical forces acting during the ski turn. Two elementary phases were defined: (1) preparing to turn (initiation) and (2) actual turning, during which the center of gravity of the skier-ski system moves along a curvilinear trajectory (steering). The starting point of the turn analysis is a dynamometric record of the resultant acting ground reaction force applied perpendicularly on the ski surface. The method was applied to six expert skiers. They completed a slalom course comprising five gates arranged on the fall line of a 26° slope at a competition speed using symmetrical carving turns (30 evaluated turns). A dynamometric measurement system was placed on the carving skis (168 cm long, radius 16 m, data were recorded at 100 Hz). MATLAB procedures were used to evaluate eight variables during each turn: five time variables and three force variables. Comparison of the turn analysis results between individuals showed that the method is useful for answering various research questions associated with ski turns.

  1. Defining the loop structures in proteins based on composite β-turn mimics.

    Science.gov (United States)

    Dhar, Jesmita; Chakrabarti, Pinak

    2015-06-01

    Asx- and ω-turns are β-turn mimics, which replace the conventional main-chain hydrogen bonds seen in the latter by those involving the side chains, and both involve three residues. In this paper we analyzed the cases where these turns occur together--side by side, with or without any gap, overlapping and in any order. These composite turns (of length 3-15 residues), occurring at ∼1 per 100 residues, may constitute the full length of many loops, and when the residues in the two component turns overlap or are adjacent to each other, the composite may take well-defined shape. It is thus possible for non-regular regions in protein structure to form local structural motifs, akin to the regular geometrical features exhibited by secondary structures. Composites having the order ω-turns followed by Asx-turns can constitute N-terminal helix capping motif. Ternary composite turns (made up of ω-, Asx- and ST-turns), some with characteristic shape, have also been identified. Delineation of composite turns would help in characterizing loops in protein structures, which often have functional roles. Some sequence patterns seen in composites can be used for their incorporation in protein design. © The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.

  2. Pilot study: Assessing the effect of continual position monitoring technology on compliance with patient turning protocols.

    Science.gov (United States)

    Schutt, Suann Cirigliano; Tarver, Christine; Pezzani, Michelle

    2018-01-01

    The study aim was to evaluate if continual patient position monitoring, taking into account self-turns and clinician-assisted turns, would increase the percentage of time a patient's position changed at least every 2 hr. While patient turning has clinical benefits, current models to help staff remember to turn patients, such as "turn clocks" and timers, have not resulted in high compliance with turning protocols. In addition, reminders are based on arbitrary 2-hr windows (such as turning on "even" hours) rather than on individual patient activity, including self-turns. This is a first inpatient, non-randomized, pre-/postintervention study. Data collection occurred from May 2013-February 2014 on a 39-bed medical unit in a community hospital. Baseline patient turning data were recorded by a sensor; however, the patient data were not displayed at the nurses' station to establish compliance with the hospital's turning protocol. Postintervention, patient position information was wirelessly displayed on nurses' station computer monitors in real time. A Student t test was used to compare baseline to postintervention "mean time in compliance." Data from 138 patients ( N  =   7,854 hr of monitoring) were collected. The baseline phase yielded 4,322 hr of position monitoring data and the postintervention phase yielded 3,532 hr of data. Statistically significant improvement was demonstrated in the percentage of time a patient's position changed at least every 2 hr from baseline to postintervention.

  3. Egg turning behavior and incubation temperature in Forster's terns in relation to mercury contamination.

    Science.gov (United States)

    Taylor, Gregory T; Ackerman, Joshua T; Shaffer, Scott A

    2018-01-01

    Egg turning behavior is an important determinant of egg hatchability, but it remains relatively understudied. Here, we examined egg turning rates and egg temperatures in Forster's terns (Sterna forsteri). We used artificial eggs containing a data logger with a 3-D accelerometer, a magnetometer, and a temperature thermistor to monitor parental incubation behavior of 131 tern nests. Overall, adults turned their eggs an average (±SD) of 3.8 ± 0.8 turns h-1, which is nearly two times higher than that of other seabirds. Egg turning rates increased with nest initiation date. We also examined egg turning rates and egg temperatures in relation to egg mercury contamination. Mercury contamination has been shown to be associated with reduced egg hatchability, and we hypothesized that mercury may decrease egg hatchability via altered egg turning behavior by parents. Despite the high variability in egg turning rates among individuals, the rate of egg turning was not related to mercury concentrations in sibling eggs. These findings highlight the need for further study concerning the potential determinants of egg turning behavior.

  4. Egg turning behavior and incubation temperature in Forster’s terns in relation to mercury contamination

    Science.gov (United States)

    Taylor, Gregory T.; Ackerman, Joshua T.; Shaffer, Scott A.

    2018-01-01

    Egg turning behavior is an important determinant of egg hatchability, but it remains relatively understudied. Here, we examined egg turning rates and egg temperatures in Forster’s terns (Sterna forsteri). We used artificial eggs containing a data logger with a 3-D accelerometer, a magnetometer, and a temperature thermistor to monitor parental incubation behavior of 131 tern nests. Overall, adults turned their eggs an average (±SD) of 3.8 ± 0.8 turns h-1, which is nearly two times higher than that of other seabirds. Egg turning rates increased with nest initiation date. We also examined egg turning rates and egg temperatures in relation to egg mercury contamination. Mercury contamination has been shown to be associated with reduced egg hatchability, and we hypothesized that mercury may decrease egg hatchability via altered egg turning behavior by parents. Despite the high variability in egg turning rates among individuals, the rate of egg turning was not related to mercury concentrations in sibling eggs. These findings highlight the need for further study concerning the potential determinants of egg turning behavior.

  5. Anticipatory detection of turning in humans for intuitive control of robotic mobility assistance.

    Science.gov (United States)

    Farkhatdinov, Ildar; Roehri, Nicolas; Burdet, Etienne

    2017-09-26

    Many wearable lower-limb robots for walking assistance have been developed in recent years. However, it remains unclear how they can be commanded in an intuitive and efficient way by their user. In particular, providing robotic assistance to neurologically impaired individuals in turning remains a significant challenge. The control should be safe to the users and their environment, yet yield sufficient performance and enable natural human-machine interaction. Here, we propose using the head and trunk anticipatory behaviour in order to detect the intention to turn in a natural, non-intrusive way, and use it for triggering turning movement in a robot for walking assistance. We therefore study head and trunk orientation during locomotion of healthy adults, and investigate upper body anticipatory behaviour during turning. The collected walking and turning kinematics data are clustered using the k-means algorithm and cross-validation tests and k-nearest neighbours method are used to evaluate the performance of turning detection during locomotion. Tests with seven subjects exhibited accurate turning detection. Head anticipated turning by more than 400-500 ms in average across all subjects. Overall, the proposed method detected turning 300 ms after its initiation and 1230 ms before the turning movement was completed. Using head anticipatory behaviour enabled to detect turning faster by about 100 ms, compared to turning detection using only pelvis orientation measurements. Finally, it was demonstrated that the proposed turning detection can improve the quality of human-robot interaction by improving the control accuracy and transparency.

  6. "Turn-off" fluorescent sensor based on double quantum dots coupled with chemometrics for highly sensitive and specific recognition of 53 famous green teas.

    Science.gov (United States)

    Hu, Ou; Xu, Lu; Fu, Haiyan; Yang, Tianming; Fan, Yao; Lan, Wei; Tang, Hebing; Wu, Yu; Ma, Lixia; Wu, Di; Wang, Yuan; Xiao, Zuobing; She, Yuanbin

    2018-05-30

    Fluorescent "turn-off" sensors based on double quantum dots (QDs) has attracted increasing attention in the detection of many materials due to their properties such as more useful information, higher fluorescence efficiency and stability compared with the fluorescent "turn-off" sensors based on single QDs. In this work, highly sensitive and specific method for recognition of 53 different famous green teas was developed based on the fluorescent "turn-off" model with water-soluble ZnCdSe-CdTe double QDs. The fluorescence of the two QDs can be quenched by different teas with varying degrees, which results in the differences in positions and intensities of two peaks. By the combination of classic partial least square discriminant analysis (PLSDA), all the green teas can be discriminated with high sensitivity, specificity and a satisfactory recognition rate of 100% for training set and 100% for prediction set, respectively. The fluorescent "turn-off" sensors based on the single QDs (either ZnCdSe QDs or CdTe QDs) coupled with PLSDA were also employed to recognize the 53 famous green teas with unsatisfactory results. Therefore, the fluorescent "turn-off" sensors based on the double QDs is more appropriate for the large-class-number classification (LCNC) of green teas. Herein, we have demonstrated, for the first time, that so many kinds of famous green teas can be discriminated by the "turn-off" model of double QDs combined with chemometrics, which has largely extended the capability of traditional fluorescence and chemometrics, as well as exhibits great potential to perform LCNC in other practical applications. Copyright © 2018 Elsevier B.V. All rights reserved.

  7. Turning point: the Robert Wood Johnson Foundation's effort to revitalize public health at the state level.

    Science.gov (United States)

    Hassmiller, Susan

    2002-01-01

    The Robert Wood Johnson (RWJ) Foundation initiated Turning Point in collaboration with the W.K. Kellogg Foundation (Kellogg) in 1997. The purpose of this major national initiative was to strengthen the public health infrastructure in the United States so that states, local communities, and their public health agencies might respond to the challenge to protect and improve the public's health in the 21st century. RWJ funded 21 states and Kellogg funded 43 communities to work together to create a new way of thinking about how health could be improved and who should be involved. Although the ultimate outcome was to improve health, both foundations expected diverse partnerships to work together to create strategic health improvement plans at both the community and state levels. The foundations funded a variety of strategies within those health improvement plans during an implementation phase. The premise in funding partnerships, as opposed to a single entity, was that effective public health systems would be developed best through a shared responsibility (including the private sector) for the health of a community.

  8. Why the Coriolis force turns a wind farm wake clockwise in the Northern Hemisphere

    Directory of Open Access Journals (Sweden)

    M. P. van der Laan

    2017-05-01

    Full Text Available The interaction between the Coriolis force and a wind farm wake is investigated by Reynolds-averaged Navier–Stokes simulations, using two different wind farm representations: a high roughness and 5 × 5 actuator disks. Surprisingly, the calculated wind farm wake deflection is the opposite in the two simulations. A momentum balance in the cross flow direction shows that the interaction between the Coriolis force and the 5 × 5 actuator disks is complex due to turbulent mixing of veered momentum from above into the wind farm, which is not observed for the interaction between the Coriolis force and a roughness change. When the wind farm simulations are performed with a horizontally constant Coriolis force in order to isolate the effect of the wind veer, the wind farm wake deflection of the 5 × 5 actuator disks simulation remains unchanged. This proves that the present wind veer deflects the wind farm wake and not the local changes in the Coriolis force in the wake deficit region. An additional simulation of a single actuator disk, operating in a shallow atmospheric boundary layer, confirms that the Coriolis force indirectly turns a wind turbine wake clockwise, as observed from above, due to the presence of a strong wind veer.

  9. Cost of installing and turning off hemodialysis on patients with central venous catheters

    Directory of Open Access Journals (Sweden)

    Gillene Santos Ferreira

    2014-12-01

    Full Text Available The objective was to identify the average total cost (ATC for installing and turning off hemodialysis on patients with central venous catheters. This quantitative, exploratory, and descriptive research, in the mode of a single-case study, was conducted in a public university hospital. The non-probabilistic sample corresponded to the observation of 100 installations and 100 terminations of hemodialysis on 42 patients during 23 days of collection. The ATC was calculated by multiplying the time spent by nurses by the unit cost of direct labor, and adding the cost of materials, solutions, and medications. The Brazilian currency (R$ was used for the calculations. The ATC for installation was R$ 80.10 and for shutting off was R$ 13.04, totaling R$ 93.14 per hemodialysis session. The results obtained will facilitate a better planning of the allocation of human, material, and financial resources enabling the increase of managerial strategies aimed at economic efficiency. doi: 10.5216/ree.v16i4.23044.

  10. Surface Roughness and Residual Stresses of High Speed Turning 300 M Ultrahigh Strength Steel

    Directory of Open Access Journals (Sweden)

    Zhang Huiping

    2014-03-01

    Full Text Available Firstly, a single factor test of the surface roughness about tuning 300 M steel is done. According to the test results, it is direct to find the sequence of various factors affecting the surface roughness. Secondly, the orthogonal cutting experiment is carried out from which the primary and secondary influence factors affecting surface roughness are obtained: feed rate and corner radius are the main factors affecting surface roughness. The more the feed rate, the greater the surface roughness. In a certain cutting speed rang, the surface roughness is smaller. The influence of depth of cut to the surface roughness is small. Thirdly, according to the results of the orthogonal experiment, the prediction model of surface roughness is established by using regressing analysis method. Using MatLab software, the prediction mode is optimized and the significance test of the optimized model is done. It showed that the prediction model matched the experiment results. Finally, the surface residual stress test of turning 300 M steel is done and the residual stress of the surface and along the depth direction is measured.

  11. On the Effect of IMF Turning on Ion Dynamics at Mercury

    Science.gov (United States)

    Delcourt, D. C.; Moore, T. E.; Fok, M.-C. H.

    2011-01-01

    We investigate the effect of a rotation of the Interplanetary Magnetic Field (IMF) on the transport of magnetospheric ion populations at Mercury. We focus on ions of planetary origin and investigate their large-scale circulation using three-dimensional single-particle simulations. We show that a nonzero Bx component of the IMF leads to a pronounced asymmetry in the overall circulation pattern . In particular, we demonstrate that the centrifugal acceleration due to curvature of the E x B drift paths is more pronounced in one hemisphere than the other, leading to filling of the magnetospheric lobes and plasma sheet with more or less energetic material depending upon the hemisphere of origin. Using a time-varying electric and magnetic field model, we investigate the response of ions to rapid (a few tens of seconds) re-orientation of the IMF. We show that, for ions with gyroperiods comparable to the field variation time scale, the inductive electric field should lead to significant nonadiabatic energization, up to several hundreds of eVs or a few keVs. It thus appears that IMP turning at Mercury should lead to localized loading of the magnetosphere with energetic material of planetary origin (e.g., Na+).

  12. Ultrasensitive reversible chromophore reaction of BODIPY functions as high ratio double turn on probe.

    Science.gov (United States)

    Hu, Dehui; Zhang, Tao; Li, Shayu; Yu, Tianjun; Zhang, Xiaohui; Hu, Rui; Feng, Jiao; Wang, Shuangqing; Liang, Tongling; Chen, Jianming; Sobenina, Lyubov N; Trofimov, Boris A; Li, Yi; Ma, Jinshi; Yang, Guoqiang

    2018-01-24

    Chromophore reactions with changes to conjugation degree, especially those between the conjugated and unconjugated state, will bring a large spectral variation. To realize such a process, a meso-naked BODIPY (MNBOD) with two electron-withdrawing groups around the core is designed and synthesized. The resulting system is extremely sensitive to bases. The red, highly fluorescent solution readily becomes colorless and non-fluorescent after base addition; however, the color and fluorescence can be totally and instantly restored by addition of acid or formaldehyde. Analyses show that two identical MNBODs are connected by a C-C single bond (sp 3 ) at the meso-position through a radical reaction that results in an unconjugated, colorless dimer complexed with bases. When the bases are consumed, the dimer immediately dissociates into the red, highly fluorescent, conjugated MNBOD monomer. With 260 nm spectral change and over 120,000 turn-on ratio, this chromophore-reaction can be utilized as a sensitive reaction-based dual-signal probe.

  13. Highly sensitive and selective chip-based fluorescent sensor for mercuric ion: development and comparison of turn-on and turn-off systems.

    Science.gov (United States)

    Du, Juan; Liu, Meiying; Lou, Xinhui; Zhao, Tao; Wang, Zheng; Xue, Ying; Zhao, Jianlong; Xu, Yuanshen

    2012-09-18

    Miniaturization is currently an important trend in environmental and food monitoring because it holds great promise for on-site monitoring and detection. We report here two ready-to-use chip-based fluorescent sensors, compatible with microarray technology for reagentless, one-step, fast, highly sensitive and selective detection of the mercuric ion (Hg(2+)) in the turn-on and turn-off operation modes. Both operation modes are based on the highly selective T-Hg(2+)-T coordination between two neighboring polythymine (T) strands at a high probe density and its induced displacement of the complementary polyadenine strand labeled with either fluorophore or quencher, which enables the turn-off and turn-on detection of Hg(2+), respectively. The turn-off sensor is slightly more sensitive than the turn-on sensor, and their detection limits are 3.6 and 8.6 nM, respectively, which are both lower than the U.S. Environmental Protection Agency limit of [Hg(2+)] for drinkable water (10 nM, 2 ppb). Compared to the turn-off sensor with the dynamic Hg(2+) detection range from 3.6 nM to 10 μM (R(2) = 0.99), the turn-on sensor has a broader dynamic Hg(2+) detection range, from 8.6 nM to 100 μM (R(2) = 0.996). Both sensors exhibited superior selectivity over other reported sensors using thymine-rich probes for Hg(2+) detection over other common metal ions. In addition, the practical application of the chip-based sensors was demonstrated by detecting spiked Hg(2+) in drinking water and fresh milk. The sensor has great potential for on-site practical applications due to its operational convenience, simplicity, speed, and portability.

  14. Stepping in Place While Voluntarily Turning Around Produces a Long-Lasting Posteffect Consisting in Inadvertent Turning While Stepping Eyes Closed

    Directory of Open Access Journals (Sweden)

    Stefania Sozzi

    2016-01-01

    Full Text Available Training subjects to step in place on a rotating platform while maintaining a fixed body orientation in space produces a posteffect consisting in inadvertent turning around while stepping in place eyes closed (podokinetic after-rotation, PKAR. We tested the hypothesis that voluntary turning around while stepping in place also produces a posteffect similar to PKAR. Sixteen subjects performed 12 min of voluntary turning while stepping around their vertical axis eyes closed and 12 min of stepping in place eyes open on the center of a platform rotating at 60°/s (pretests. Then, subjects continued stepping in place eyes closed for at least 10 min (posteffect. We recorded the positions of markers fixed to head, shoulder, and feet. The posteffect of voluntary turning shared all features of PKAR. Time decay of angular velocity, stepping cadence, head acceleration, and ratio of angular velocity after to angular velocity before were similar between both protocols. Both postrotations took place inadvertently. The posteffects are possibly dependent on the repeated voluntary contraction of leg and foot intrarotating pelvic muscles that rotate the trunk over the stance foot, a synergy common to both protocols. We propose that stepping in place and voluntary turning can be a scheme ancillary to the rotating platform for training body segment coordination in patients with impairment of turning synergies of various origin.

  15. Estimation Method for Turn-off Collector Voltage of IGBTs Using Emitter-auxiliary Inductor

    DEFF Research Database (Denmark)

    Luo, Haoze; Iannuzzo, Francesco; Blaabjerg, Frede

    2016-01-01

    This paper presents a method for estimating the instantaneous turn-off collector voltage of high-power IGBT modules. Because of the parasitic inductors in circuit, the fast turn-off collector current usually leads to a voltage overshoot on IGBT modules during the turn-off transition. In terms...... of high-voltage and high-power IGBT module, there exists an emitter-auxiliary inductor between the power emitter and Kelvin emitter. The same variable dic/dt during turn-off transition will also induce a measurable voltage veE across the emitter-auxiliary inductor LeE. As a result, the hazardous turn......-off peak collector voltage can be reflected by the induced νeE in the case of fixed commutation loop inductors and emitter auxiliary inductor. Finally, a double pulse test platform is used to validate the effectiveness of estimation method. The estimation curves of turn-off collector voltage...

  16. Plant breeding in the turn of the millennium

    Directory of Open Access Journals (Sweden)

    Aluízio Borém

    1998-01-01

    Full Text Available The transition from hunting and gathering to farming happened about 10,000 years ago, independently and diffusely in several places in the world. Plant breeders were responsible for genetic progress in a number of crop species. It included hybrids, the introgression of wild species genes and also the Green Revolution, which started in the 1960's with the cereals. The varieties developed by breeding, along with the use of new crop technology (fertilization, soil tillage, etc. changed the status of some countries from importers to exporters of food. In the turn of the millennium,, plant breeding, faces new challenges in a globalized world, but it has new tools to deal with them. Notwithstanding the present contributions of plant breeding and crop management, its future contributions may be even greater. The partnership being developed between plant breeding and biotechnology will assure a more consistent and predictable genetic progress. Current contributions of biotechnology have arrived for many crops in different places of the world. Varieties developed by transformation are grown in large acreage in some countries. Some concerns have also arisen from the use of GMOs. For example, the introgression of a gene for insect resistance 4 into many different species could result in an undesirable endemic risk, here called interespecific biotechnological vulnerability. Another concern is that biotechnology race may create yield plateaus in programs using genes pyramiding for all new traits made available by biotechnology, resulting in what is called genetic gridlock. Nevertheless, the benefits of using biotechnology will substantially enhance the contributions of plant breeding to human lifeA transição da fase de coleta e caça para a agricultura ocorreu há cerca de dez mil anos independentemente e em vários locais no mundo. Naquela época iniciou-se a domesticação da maioria das espécies cultivadas, dando início às atividades agrícolas. Os

  17. Decision-Making and Turn Alternation in Pill Bugs (Armadillidium Vulgare)

    OpenAIRE

    Moriyama, Tohru

    1999-01-01

    Twelve pill bugs (Armadillidium vulgare, Isopoda, Cmstacean) were examined in 200 successive T-mazes. When obstacles are present, A. vulgare tend to move by means of turn alternation, which is generally considered an innate adaptive behavior. With a decrease in air moisture, the bugs have a tendency to increase their turn alternation rate. However, in such long successive T-mazes as in this study, continued turn alternation should actually accelerate the bugs' desiccation. This fact implies t...

  18. The additive effect of turn-taking cues in human and synthetic voice

    OpenAIRE

    2010-01-01

    Abstract A previous line of research suggests that interlocutors identify appropriate places to speak by cues in the behaviour of the preceding speaker. If used in combination, these cues have an additive effect on listeners? turn-taking attempts. The present study further explores these findings by examining the effect of such turn-taking cues experimentally. The objective is to investigate the possibilities of generating turn-taking cues with a synthetic voice. Thus, in addition ...

  19. Efficiency of static core turn-off in a system-on-a-chip with variation

    Science.gov (United States)

    Cher, Chen-Yong; Coteus, Paul W; Gara, Alan; Kursun, Eren; Paulsen, David P; Schuelke, Brian A; Sheets, II, John E; Tian, Shurong

    2013-10-29

    A processor-implemented method for improving efficiency of a static core turn-off in a multi-core processor with variation, the method comprising: conducting via a simulation a turn-off analysis of the multi-core processor at the multi-core processor's design stage, wherein the turn-off analysis of the multi-core processor at the multi-core processor's design stage includes a first output corresponding to a first multi-core processor core to turn off; conducting a turn-off analysis of the multi-core processor at the multi-core processor's testing stage, wherein the turn-off analysis of the multi-core processor at the multi-core processor's testing stage includes a second output corresponding to a second multi-core processor core to turn off; comparing the first output and the second output to determine if the first output is referring to the same core to turn off as the second output; outputting a third output corresponding to the first multi-core processor core if the first output and the second output are both referring to the same core to turn off.

  20. Required coefficient of friction in the anteroposterior and mediolateral direction during turning at different walking speeds.

    Science.gov (United States)

    Yamaguchi, Takeshi; Suzuki, Akito; Hokkirigawa, Kazuo

    2017-01-01

    This study investigated the required coefficient of friction (RCOF) and the tangent of center of mass (COM)-center of pressure (COP) angle in the mediolateral (ML) and anteroposterior (AP) directions during turning at different walking speeds. Sixteen healthy young adults (8 males and 8 females) participated in this study. The participants were instructed to conduct trials of straight walking and 90° step and spin turns to the right at each of three self-selected speeds (slow, normal, and fast). The ML and AP directions during turning gait were defined using the orientation of the pelvis to construct a body-fixed reference frame. The RCOF values and COM-COP angle tangent in the ML direction during turning at weight acceptance phase were higher than those during straight walking, and those values increased with increasing walking speed. The ML component of the RCOF and COM-COP tangent values during weight acceptance for step turns were higher than those for spin turns. The mean centripetal force during turning tended to increase with an increase in walking speed and had a strong positive correlation with the RCOF values in the ML direction (R = 0.97 during the weight acceptance phase; R = 0.95 during the push-off phase). Therefore, turning, particularly step turn, is likely to cause lateral slip at weight acceptance because of the increased centripetal force compared with straight walking. Future work should test at-risk population and compare with the present results.

  1. Classifying Step and Spin Turns Using Wireless Gyroscopes and Implications for Fall Risk Assessments

    Directory of Open Access Journals (Sweden)

    Peter C. Fino

    2015-05-01

    Full Text Available Recent studies have reported a greater prevalence of spin turns, which are more unstable than step turns, in older adults compared to young adults in laboratory settings. Currently, turning strategies can only be identified through visual observation, either in-person or through video. This paper presents two unique methods and their combination to remotely monitor turning behavior using three uniaxial gyroscopes. Five young adults performed 90° turns at slow, normal, and fast walking speeds around a variety of obstacles while instrumented with three IMUs (attached on the trunk, left and right shank. Raw data from 360 trials were analyzed. Compared to visual classification, the two IMU methods’ sensitivity/specificity to detecting spin turns were 76.1%/76.7% and 76.1%/84.4%, respectively. When the two methods were combined, the IMU had an overall 86.8% sensitivity and 92.2% specificity, with 89.4%/100% sensitivity/specificity at slow speeds. This combined method can be implemented into wireless fall prevention systems and used to identify increased use of spin turns. This method allows for longitudinal monitoring of turning strategies and allows researchers to test for potential associations between the frequency of spin turns and clinically relevant outcomes (e.g., falls in non-laboratory settings.

  2. Turning dread into capital: South Africa's AIDS diplomacy.

    Science.gov (United States)

    Fourie, Pieter

    2013-03-05

    In much of the world, President George W. Bush was not admired for his foreign policy and diplomacy. It is therefore ironic that Bush's single most uncontested foreign policy triumph was an instance of what has now become known as "health diplomacy". In 2003 Bush launched the President's Emergency Plan for AIDS Relief, a five-year $15 billion initiative to fight HIV/AIDS, mostly in Africa. The president's pragmatic health diplomacy may well save his foreign policy legacy. This article argues that a middle power such as South Africa should consider a similar instrumental AIDS diplomatic strategy, to rehabilitate its public health as well as foreign policy images. This article reflects on the emergence and contemporary practice of health diplomacy. In particular, it explores the potential of niche areas within health diplomacy to become constructive focal points of emerging middle powers' foreign policies. Middle powers often apply niche diplomacy to maximise their foreign policy impact, particularly by pursuing a multilateral agenda. The literature on middle powers indicates that such foreign policy ambitions and concomitant diplomacy mostly act to affirm the global status quo. Instead, this paper argues that there may well be niches within health diplomacy in particular that can be used to actually challenge the existing global order. Emerging middle powers in particular can use niche areas within health diplomacy in a critical theoretical manner, so that foreign policy and diplomacy become a project of emancipation and transformation, rather than an affirmation of the world as it is. The article first describes the emergence and contemporary practice of health diplomacy; this is followed by a discussion of niche diplomacy, in particular as it applies to the foreign policy agendas of emerging middle powers. It then reviews South African foreign policy and diplomacy, before situating these policies within the context of emerging mechanisms of south

  3. Turning dread into capital: South Africa’s AIDS diplomacy

    Science.gov (United States)

    2013-01-01

    Background In much of the world, President George W. Bush was not admired for his foreign policy and diplomacy. It is therefore ironic that Bush’s single most uncontested foreign policy triumph was an instance of what has now become known as “health diplomacy”. In 2003 Bush launched the President’s Emergency Plan for AIDS Relief, a five-year $15 billion initiative to fight HIV/AIDS, mostly in Africa. The president’s pragmatic health diplomacy may well save his foreign policy legacy. This article argues that a middle power such as South Africa should consider a similar instrumental AIDS diplomatic strategy, to rehabilitate its public health as well as foreign policy images. Discussion This article reflects on the emergence and contemporary practice of health diplomacy. In particular, it explores the potential of niche areas within health diplomacy to become constructive focal points of emerging middle powers’ foreign policies. Middle powers often apply niche diplomacy to maximise their foreign policy impact, particularly by pursuing a multilateral agenda. The literature on middle powers indicates that such foreign policy ambitions and concomitant diplomacy mostly act to affirm the global status quo. Instead, this paper argues that there may well be niches within health diplomacy in particular that can be used to actually challenge the existing global order. Emerging middle powers in particular can use niche areas within health diplomacy in a critical theoretical manner, so that foreign policy and diplomacy become a project of emancipation and transformation, rather than an affirmation of the world as it is. Summary The article first describes the emergence and contemporary practice of health diplomacy; this is followed by a discussion of niche diplomacy, in particular as it applies to the foreign policy agendas of emerging middle powers. It then reviews South African foreign policy and diplomacy, before situating these policies within the context of

  4. Predictors and use of nonpharmacologic interventions for procedural pain associated with turning among hospitalized adults.

    Science.gov (United States)

    Faigeles, Bonnie; Howie-Esquivel, Jill; Miaskowski, Christine; Stanik-Hutt, Julie; Thompson, Carol; White, Cheri; Wild, Lorie Rietman; Puntillo, Kathleen

    2013-06-01

    Many hospitalized adults cannot reposition themselves in their beds. Therefore, they are regularly turned by their nurses, primarily to prevent pressure ulcer formation. Earlier research indicates that turning is painful and that patients are rarely premedicated with analgesics. Nonpharmacologic interventions may be used to help with this painful procedure. However, no published research was found on the use of nonpharmacologic interventions for turning of hospitalized patients. The objectives of this study were: 1) to describe patient pain characteristics during turning and their association with patient demographic and clinical characteristics; 2) to determine the frequency of use of various nonpharmacologic interventions for hospitalized adult patients undergoing the painful procedure of turning; and 3) to identify factors that predict the use of specific nonpharmacologic interventions for pain associated with turning. Hospitalized adult patients who experienced turning, the nurses caring for them, and others who were present at the time of turning were asked if they used various nonpharmacologic interventions to manage pain during the turning. Out of 1,395 patients, 92.5% received at least one nonpharmacologic intervention. Most frequently used were calming voice (65.7%), information (60.6%), and deep breathing (37.9%). Critical-care patients were more likely to receive a calming voice (odds ratio [OR] 1.66, p patients. Those reporting higher pain were consistently more likely to receive each of the three interventions (OR 1.01, p turning procedure. The specific interventions used most often are ones that can be initiated spontaneously. Our data suggest that patients, nurses, and family members respond to patients' turning-related pain by using nonpharmacologic interventions. Copyright © 2013 American Society for Pain Management Nursing. Published by Elsevier Inc. All rights reserved.

  5. A narrative review of turning deficits in people with Parkinson's disease.

    Science.gov (United States)

    Hulbert, Sophia; Ashburn, Ann; Robert, Lisa; Verheyden, Geert

    2015-01-01

    Clinically, people with Parkinson's disease (PD) demonstrate a loss of axial rotation of the spine often described as moving "enbloc", with little dissociation between the head, trunk and lower limbs whilst turning. The purpose of this narrative review is to explore the behaviour and relationship of the reported deficits during whole body turning in people with PD, compared to controls. Better understanding of the relationship and impact of the deficits will permit the development of tailored and novel intervention strategies to improve functional performance in turning for people with PD. Four electronic databases with the search terms: Parkinson* and turn* were used. Seventy-seven papers were reviewed. Turning deficits in people with PD were identified as originating from two hypothetical body segments - perpendicular (i.e. legs) or axial (i.e. head, trunk and pelvis) segments and the relationship between them discussed. Specific movement deficits in turning in people with PD can be categorised into axial and perpendicular deficits. Synthesis of the literature suggests the possibility of axial deficits driving secondary responses in the perpendicular segments. This should be explored when designing rehabilitation aimed at improving turning performance, as current therapy guidelines focus on exercises emphasising perpendicular aspects. Implications for Rehabilitation Turning performance is compromised in people with PD, which can lead to significant disability, falls and loss of function. Specific movement deficits can be categorised into perpendicular deficits (taking more steps and shorter steps and an altered turn strategy) and axial deficits (segment rigidity, altered segment co-ordination and timing, reduced segment rotation and the effects of altered posture). Axial deficits may drive secondary responses in the perpendicular segments during turning in people with PD. Therefore, specific focus should be made to the rehabilitation of the axial deficits

  6. Kinematical Comparison of the 200 m Backstroke Turns between National and Regional Level Swimmers

    Directory of Open Access Journals (Sweden)

    Santiago Veiga

    2013-12-01

    Full Text Available The aims of this investigation were to determine the evolution of selected turn variables during competitive backstroke races and to compare these kinematic variables between two different levels of swimmers. Sixteen national and regional level male swimmers participant in the 200 m backstroke event at the Spanish Swimming Championships in short course (25 m were selected to analyze their turn performances. The individual distances method with two-dimensional Direct Linear Transformation (2D-DLT algorithms was used to perform race analyses. National level swimmers presented a shorter “turn time”, a longer “distance in”, a faster “underwater velocity” and “normalized underwater velocity”, and a faster “stroking velocity” than regional level swimmers, whereas no significant differences were detected between levels for the “underwater distance”. National level swimmers maintained similar “turn times” over the event and increased “underwater velocity” and “normalized underwater velocity” in the last (seventh turn segment, whereas regional level swimmers increased “turn time” in the last half of the race. For both national and regional level swimmers, turn “underwater distance” during the last three turns of the race was significantly shorter while no significant differences in distance into the wall occurred throughout the race. The skill level of the swimmers has an impact on the competitive backstroke turn segments. In a 200 m event, the underwater velocity should be maximized to maintain turn proficiency, whereas turn distance must be subordinated to the average velocity.

  7. Turning Towards or Turning Away: A Comparison of Mindfulness Meditation and Guided Imagery Relaxation in Patients with Acute Depression.

    Science.gov (United States)

    Costa, Ana; Barnhofer, Thorsten

    2016-07-01

    Disengaging from maladaptive thinking is an important imperative in the treatment of depression. Mindfulness training is aimed at helping patients acquire relevant skills for this purpose. It remains unclear, however, whether this practice is helpful when patients are acutely depressed. In order to investigate effects of mindfulness on symptoms and self-regulatory capacities in this group, the current study compared a brief training in mindfulness (n = 19) to guided imagery relaxation (n = 18). Participants were introduced to the respective techniques in a single session, and practised daily over one week. Self-reported severity of symptoms, difficulties in emotion-regulation, attentional control, the ability to decentre, and mindfulness were assessed pre and postintervention, and at a one-week follow-up. Symptoms of depression significantly decreased and self-regulatory functioning significantly increased in both groups, with changes being maintained during follow-up. When controlling for change in depressive symptoms, results showed significantly higher improvements in emotion regulation at follow-up in the mindfulness group. The ability to decentre predicted changes in symptoms from pre to postintervention, while mindfulness skills predicted changes in symptoms during the maintenance phase. The findings suggest that both practices can help to instigate reductions in symptoms and enhance self-regulatory functioning in depression. However, in order to improve emotion regulation above levels explained by reductions in symptoms more intentional mental training seems necessary. Furthermore, while the ability to disengage from negative patterns of thinking seems crucial for initial reduction of symptoms, maintenance of gains might require broader skills in mindfulness.

  8. effect of turning parameters on metal removal and tool wear rates

    African Journals Online (AJOL)

    user

    The MRR and TW Rare very important factors in the machining process and have effect on the machining and tooling costs during turning operation. To increase productivity and reduce machining and tooling costs the engineer needs to select optimum process parameters during turning. Optimization aims at enhancing the.

  9. Devolution and Corruption in Kenya: Everyone’s Turn To Eat?

    DEFF Research Database (Denmark)

    D'Arcy, Michelle; Cornell, Agnes

    2016-01-01

    of patronage networks, meaning that the “our turn to eat” character of ethnic patronage politics persists. As a result, although a greater number of groups now have their turn, ethnic minorities within some counties feel marginalized, including certain trapped minorities from politically relevant groups....

  10. A prospective observational study of ICU patient position and frequency of turning.

    Science.gov (United States)

    Goldhill, D R; Badacsonyi, A; Goldhill, A A; Waldmann, C

    2008-05-01

    Positioning and turning critically ill patients may be beneficial but there are little data on current practice. We prospectively recorded patient position every hour over two separate days in 40 British intensive care units and analysed 393 sets of observation. Five patients were prone at any time and 3.8% (day 1) and 5% (day 2) were on rotating beds. Patients were on their back for 46.1% of observations, turned left for 28.4% and right for 25.5%, and head up for 97.4%. A turn was defined as a change between on back, turned left or turned right. The average time (SD) between turns was 4.85 (3.3) h. There was no significant association between the average time between turns and age, weight, height, gender, respiratory diagnosis, intubated and ventilated, sedation score, day of week or nurse:patient ratio. There was a significant difference between hospitals in the frequency with which patients were turned.

  11. Computational models of social and emotional turn-taking for embodied conversational agents: a review

    NARCIS (Netherlands)

    op den Akker, Hendrikus J.A.; Bruijnes, Merijn

    2012-01-01

    The emotional involvement of participants in a conversation not only shows in the words they speak and in the way they speak and gesture but also in their turn-taking behavior. This paper reviews research into computational models of embodied conversational agents. We focus on models for turn-taking

  12. CNC Turning Center Advanced Operations. Computer Numerical Control Operator/Programmer. 444-332.

    Science.gov (United States)

    Skowronski, Steven D.; Tatum, Kenneth

    This student guide provides materials for a course designed to introduce the student to the operations and functions of a two-axis computer numerical control (CNC) turning center. The course consists of seven units. Unit 1 presents course expectations and syllabus, covers safety precautions, and describes the CNC turning center components, CNC…

  13. You cannot speak and listen at the same time: a probabilistic model of turn-taking.

    Science.gov (United States)

    Donnarumma, Francesco; Dindo, Haris; Iodice, Pierpaolo; Pezzulo, Giovanni

    2017-04-01

    Turn-taking is a preverbal skill whose mastering constitutes an important precondition for many social interactions and joint actions. However, the cognitive mechanisms supporting turn-taking abilities are still poorly understood. Here, we propose a computational analysis of turn-taking in terms of two general mechanisms supporting joint actions: action prediction (e.g., recognizing the interlocutor's message and predicting the end of turn) and signaling (e.g., modifying one's own speech to make it more predictable and discriminable). We test the hypothesis that in a simulated conversational scenario dyads using these two mechanisms can recognize the utterances of their co-actors faster, which in turn permits them to give and take turns more efficiently. Furthermore, we discuss how turn-taking dynamics depend on the fact that agents cannot simultaneously use their internal models for both action (or messages) prediction and production, as these have different requirements-or, in other words, they cannot speak and listen at the same time with the same level of accuracy. Our results provide a computational-level characterization of turn-taking in terms of cognitive mechanisms of action prediction and signaling that are shared across various interaction and joint action domains.

  14. Possibilities in the Boy Turn? Comparative Lessons from Australia and Iceland

    Science.gov (United States)

    Johannesson, Ingolfur Asgeir; Lingard, Bob; Mills, Martin

    2009-01-01

    Recognising that there is now a globalised educational discourse about "failing boys" circulating in the privileged nations of the global north, this article provides a comparative perspective on educational policy responses to the "boy turn" in Australia and Iceland. Specificities of the responses to the boy turn in the two…

  15. Turning Points during the Life of Student Project Teams: A Qualitative Study

    Science.gov (United States)

    Raes, Elisabeth; Kyndt, Eva; Dochy, Filip

    2015-01-01

    In this qualitative study a more flexible alternative of conceptualising changes over time in teams is tested within student project teams. The conceptualisation uses turning points during the lifespan of a team to outline team development, based on work by Erbert, Mearns, & Dena (2005). Turning points are moments that made a significant…

  16. A framework for improving reliability of truck turn times in FMCG transport networks

    NARCIS (Netherlands)

    Ploos van Amstel, W.; Clermonts, W.

    2013-01-01

    Truck turn times in FMCG supply chain are unreliable. The Dutch ‘Speed Docking’ project in 2011 and 2012 gave clear evidence to this. This leads to additional trucks and drivers in transport networks. Improving reliability of truck turn time will lead to less trucks and drivers in the transport

  17. How turn-taking strategies influence users’ impressions of an agent

    NARCIS (Netherlands)

    ter Maat, Mark; Truong, Khiet Phuong; Heylen, Dirk K.J.; Allbeck, Jan; Badler, Norman; Bickmore, Timothy; Pelachaud, Catherine; Safonova, Alla

    Different turn-taking strategies of an agent influence the impression that people have of it. We recorded conversations of a human with an interviewing agent, controlled by a wizard and using a particular turn-taking strategy. A questionnaire with 27 semantic differential scales concerning

  18. Differences of Ballet Turns ("Pirouette") Performance between Experienced and Novice Ballet Dancers

    Science.gov (United States)

    Lin, Chia-Wei; Chen, Shing-Jye; Su, Fong-Chin; Wu, Hong-Wen; Lin, Cheng-Feng

    2014-01-01

    Purpose: This study investigated the different postural control strategies exhibited by experienced and novice dancers in ballet turns ("pirouettes"). Method: Thirteen novice and 13 experienced dancers performed ballet turns with dominant-leg support. The peak push force was measured in the double-leg support phase. The inclination…

  19. Role of orexin receptors in the nucleus accumbens in dopamine-dependent turning behaviour of rats.

    NARCIS (Netherlands)

    Kotani, A.; Ikeda, H.; Koshikawa, N.; Cools, A.R.

    2008-01-01

    The role of orexin receptors in the nucleus accumbens shell in rat turning behaviour of rats was studied. Unilateral injection of neither the orexin 1 and 2 receptor agonist orexin A (2 microg) nor the orexin 1 receptor antagonist SB 334867 (20 ng) into the nucleus accumbens shell elicited turning

  20. Theoretical tool movement required to diamond turn an off-axis paraboloid on axis

    International Nuclear Information System (INIS)

    Thompson, D.C.

    1976-01-01

    Current techniques for manufacturing off-axis paraboloids are both expensive and insufficiently accurate. An alternative method, turning the workpiece about its axis on a diamond-turning machine, is presented, and the equations describing the necessary tool movement are derived. A discussion of a particular case suggests that the proposed technique is feasible

  1. The effects of processing and sequence organization on the timing of turn taking: a corpus study

    Science.gov (United States)

    Roberts, Seán G.; Torreira, Francisco; Levinson, Stephen C.

    2015-01-01

    The timing of turn taking in conversation is extremely rapid given the cognitive demands on speakers to comprehend, plan and execute turns in real time. Findings from psycholinguistics predict that the timing of turn taking is influenced by demands on processing, such as word frequency or syntactic complexity. An alternative view comes from the field of conversation analysis, which predicts that the rules of turn-taking and sequence organization may dictate the variation in gap durations (e.g., the functional role of each turn in communication). In this paper, we estimate the role of these two different kinds of factors in determining the speed of turn-taking in conversation. We use the Switchboard corpus of English telephone conversation, already richly annotated for syntactic structure speech act sequences, and segmental alignment. To this we add further information including Floor Transfer Offset (the amount of time between the end of one turn and the beginning of the next), word frequency, concreteness, and surprisal values. We then apply a novel statistical framework (“random forests”) to show that these two dimensions are interwoven together with indexical properties of the speakers as explanatory factors determining the speed of response. We conclude that an explanation of the of the timing of turn taking will require insights from both processing and sequence organization. PMID:26029125

  2. 1.06 μm 150 psec laser damage study of diamond turned, diamond turned/polished and polished metal mirrors

    International Nuclear Information System (INIS)

    Saito, T.T.; Milam, D.; Baker, P.; Murphy, G.

    1975-01-01

    Using a well characterized 1.06 μm 150 ps glass laser pulse the damage characteristics for diamond turned, diamond turned/ polished, and polished copper and silver mirrors less than 5 cm diameter were studied. Although most samples were tested with a normal angle of incidence, some were tested at 45 0 with different linear polarization showing an increase in damage threshold for S polarization. Different damage mechanisms observed will be discussed. Laser damage is related to residual surface influences of the fabrication process. First attempts to polish diamond turned surfaces resulted in a significant decrease in laser damage threshold. The importance of including the heat of fusion in the one dimensional heat analysis of the theoretical damage threshold and how close the samples came to the theoretical damage threshold is discussed. (auth)

  3. The management of turn transition in signed interaction through the lens of overlaps

    Directory of Open Access Journals (Sweden)

    Simone eGirard-Groeber

    2015-06-01

    Full Text Available There have been relatively few studies on sign language interaction carried out within the framework of conversation analysis (CA. Therefore, questions remain open about how the basic building blocks of social interaction such as turn, turn construction unit (TCU and turn transition relevance place (TRP can be understood and analysed in sign language interaction. Recent studies have shown that signers regularly fine-tune their turn-beginnings to potential completion points of turns (De Vos, Torreira & Levinson, 2015; Groeber, 2014; Groeber & Pochon-Berger, 2014. Moreover, signers deploy practices for overlap resolution as in spoken interaction (McCleary & Leite, 2013. While these studies have highlighted the signers’ orientation to the ‘one-at-a-time’ principle described by Sacks et al., (1974, the present article adds to this line of research by investigating in more detail those sequential environments where overlaps occur. The contribution provides an overview of different types of overlap with a focus of the overlap’s onset with regard to a current signer’s turn. On the basis of a 33-minute video-recording of a multi-party interaction between 4 female signers in Swiss German Sign Language (DSGS, the paper provides evidence for the orderliness of overlapping signing. Furthermore, the contribution demonstrates how participants collaborate in the situated construction of turns as a dynamic and emergent gestalt and how they interactionally achieve turn transition. Thereby the study adds to recent research in spoken and in signed interaction that proposes to rethink turn boundaries and turn transition as flexible and interactionally achieved.

  4. The use of turning tasks in clinical gait analysis for children with cerebral palsy.

    Science.gov (United States)

    Dixon, Philippe C; Stebbins, Julie; Theologis, Tim; Zavatsky, Amy B

    2016-02-01

    Turning while walking is a crucial component of locomotion that is performed using an outside (step) or inside (spin) limb strategy. The aims of this paper were to determine how children with cerebral palsy perform turning maneuvers and if specific kinematic and kinetic adaptations occur compared to their typically developing peers. Motion capture data from twenty-two children with cerebral palsy and fifty-four typically developing children were collected during straight and 90° turning gait trials. Experimental data were used to compute spatio-temporal parameters, margin of stability, ground reaction force impulse, as well as joint kinematics and kinetics. Both child groups preferred turning using the spin strategy. The group of children with cerebral palsy exhibited the following adaptations during turning gait compared to the typically developing group: stride length was decreased across all phases of the turn with largest effect size for the depart phase (2.02), stride width was reduced during the turn phase, but with a smaller effect size (0.71), and the average margin of stability during the approach phase of turning was reduced (effect size of 0.98). Few overall group differences were found for joint kinematic and kinetic measures; however, in many cases, the intra-subject differences between straight walking and turning gait were larger for the majority of children with cerebral palsy than for the typically developing children. In children with cerebral palsy, turning gait may be a better discriminant of pathology than straight walking and could be used to improve the management of gait abnormalities. Copyright © 2015 Elsevier Ltd. All rights reserved.

  5. Investigation of bending loss in a single-mode optical fibre

    Indian Academy of Sciences (India)

    Abstract. Loss of optical power in a single-mode optical fibre due to bending has been investigated for a wavelength of 1550 nm. In this experiment, the effects of bending radius (4–15 mm, with steps of 1 mm), and wrapping turns (up to 40 turns) on loss have been studied. Twisting the optical fibre and its influence on power ...

  6. A method for simultaneous linear optics and coupling correction for storage rings with turn-by-turn beam position monitor data

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Xi; Huang, Xiaobiao

    2016-08-01

    We propose a method to simultaneously correct linear optics errors and linear coupling for storage rings using turn-by-turn (TbT) beam position monitor (BPM) data. The independent component analysis (ICA) method is used to isolate the betatron normal modes from the measured TbT BPM data. The betatron amplitudes and phase advances of the projections of the normal modes on the horizontal and vertical planes are then extracted, which, combined with dispersion measurement, are used to fit the lattice model. The fitting results are used for lattice correction. The method has been successfully demonstrated on the NSLS-II storage ring.

  7. A method for simultaneous linear optics and coupling correction for storage rings with turn-by-turn beam position monitor data

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Xi [Brookhaven National Laboratory, Upton, Long Island, NY 11973 (United States); Huang, Xiaobiao, E-mail: xiahuang@slac.stanford.edu [SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025 (United States)

    2016-08-21

    We propose a method to simultaneously correct linear optics errors and linear coupling for storage rings using turn-by-turn (TbT) beam position monitor (BPM) data. The independent component analysis (ICA) method is used to isolate the betatron normal modes from the measured TbT BPM data. The betatron amplitudes and phase advances of the projections of the normal modes on the horizontal and vertical planes are then extracted, which, combined with dispersion measurement, are used to fit the lattice model. The fitting results are used for lattice correction. The method has been successfully demonstrated on the NSLS-II storage ring.

  8. A method for simultaneous linear optics and coupling correction for storage rings with turn-by-turn beam position monitor data

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Xi [Brookhaven National Lab. (BNL), Upton, NY (United States); Huang, Xiaobiao [SLAC National Accelerator Lab., Menlo Park, CA (United States)

    2016-08-01

    We propose a method to simultaneously correct linear optics errors and linear coupling for storage rings using turn-by-turn (TbT) beam position monitor (BPM) data. The independent component analysis (ICA) method is used to isolate the betatron normal modes from the measured TbT BPM data. The betatron amplitudes and phase advances of the projections of the normal modes on the horizontal and vertical planes are then extracted, which, combined with dispersion measurement, are used to fit the lattice model. Furthermore, the fitting results are used for lattice correction. Our method has been successfully demonstrated on the NSLS-II storage ring.

  9. Pre-shelling parameters and conditions that influence the whole kernel out-turn of steam-boiled cashew nuts

    Directory of Open Access Journals (Sweden)

    Babatunde Sunday Ogunsina

    2014-01-01

    Full Text Available This work investigates the effect of moisture content (MC, nut size distribution and steam exposure time (SET on the whole kernel out turn (WKO of cashew nuts during shelling using a 3 x 5 x 4 factorial experiment. Three nut sizes: small (18–22 mm, medium (23–25 mm and large (26–35 mm; five levels of MC: 8.34%, 11.80%, 12.57%, 15.40%, 16.84% (wet basis and four levels of steam exposure time (SET: 28, 30, 32, and 34 min were considered. Nuts were conditioned with warm water to the desired moisture content of 8.34%,11.80%, 12.57%, 15.40% and 16.84% (wb; and steam-boiled at 700 kPa for 28, 30,32, and 34 min. The pre-treated nuts were shelled using a hand-operated cashew nuts shelling machine. The results showed that the single effect of MC, steam exposure time (SET or nut size distribution is not enough for estimating WKO; it is rather by an interaction of these parameters. The optimum WKO of steam-boiled nuts was 91.74%, 90.94% and 87.98% for large, medium and small sized nuts at MC∗SET combination of 8.34%∗30 min, 11.80%∗32 min and 8.34%∗30 min, respectively. Pre-treatment of cashew nuts by steam boiling was found to improve whole kernel out-turn of the cashew nut. Whole kernel out-turn decreased as MC increased, thereby limiting the need for moisture adjustment when nuts are to be processed by steam boiling.

  10. Costs of switching auditory spatial attention in following conversational turn-taking.

    Science.gov (United States)

    Lin, Gaven; Carlile, Simon

    2015-01-01

    Following a multi-talker conversation relies on the ability to rapidly and efficiently shift the focus of spatial attention from one talker to another. The current study investigated the listening costs associated with shifts in spatial attention during conversational turn-taking in 16 normally-hearing listeners using a novel sentence recall task. Three pairs of syntactically fixed but semantically unpredictable matrix sentences, recorded from a single male talker, were presented concurrently through an array of three loudspeakers (directly ahead and +/-30° azimuth). Subjects attended to one spatial location, cued by a tone, and followed the target conversation from one sentence to the next using the call-sign at the beginning of each sentence. Subjects were required to report the last three words of each sentence (speech recall task) or answer multiple choice questions related to the target material (speech comprehension task). The reading span test, attention network test, and trail making test were also administered to assess working memory, attentional control, and executive function. There was a 10.7 ± 1.3% decrease in word recall, a pronounced primacy effect, and a rise in masker confusion errors and word omissions when the target switched location between sentences. Switching costs were independent of the location, direction, and angular size of the spatial shift but did appear to be load dependent and only significant for complex questions requiring multiple cognitive operations. Reading span scores were positively correlated with total words recalled, and negatively correlated with switching costs and word omissions. Task switching speed (Trail-B time) was also significantly correlated with recall accuracy. Overall, this study highlights (i) the listening costs associated with shifts in spatial attention and (ii) the important role of working memory in maintaining goal relevant information and extracting meaning from dynamic multi-talker conversations.

  11. Costs of switching auditory spatial attention in following conversational turn-taking

    Directory of Open Access Journals (Sweden)

    Gaven eLin

    2015-04-01

    Full Text Available Following a multi-talker conversation relies on the ability to rapidly and efficiently shift the focus of spatial attention from one talker to another. The current study investigated the listening costs associated with shifts in spatial attention during conversational turn-taking in 16 normally-hearing listeners using a novel sentence recall task. Three pairs of syntactically fixed but semantically unpredictable matrix sentences, recorded from a single male talker, were presented concurrently through an array of three loudspeakers (directly ahead and +/-30° azimuth. Subjects attended to one spatial location, cued by a tone, and followed the target conversation from one sentence to the next using the call-sign at the beginning of each sentence. Subjects were required to report the last three words of each sentence (speech recall task or answer multiple choice questions related to the target material (speech comprehension task. The reading span test, attention network test, and trail making test were also administered to assess working memory, attentional control, and executive function. There was a 10.7 ± 1.3% decrease in word recall, a pronounced primacy effect, and a rise in masker confusion errors and word omissions when the target switched location between sentences. Switching costs were independent of the location, direction, and angular size of the spatial shift but did appear to be load dependent and only significant for complex questions requiring multiple cognitive operations. Reading span scores were positively correlated with total words recalled, and negatively correlated with switching costs and word omissions. Task switching speed (Trail-B time was also significantly correlated with recall accuracy. Overall, this study highlights i the listening costs associated with shifts in spatial attention and ii the important role of working memory in maintaining goal relevant information and extracting meaning from dynamic multi

  12. Campaign launched to eliminate tsetse fly, which has turned much of Africa into a green desert

    International Nuclear Information System (INIS)

    2002-01-01

    A new campaign to control the deadly tsetse fly in Africa, parasitic carrier of sleeping sickness, has been launched by the Organization of African Unity (OAU). African sleeping sickness affects as many as 500,000 people, 80 percent of whom eventually die, and the bite of the fly causes more than $4 billion in economic losses annually. The tsetse fly has turned much of the fertile African landscape into an uninhabited 'green desert', spreading sleeping sickness -- and killing 3 million livestock animals every year. The fly is the carrier of the single cell parasite, trypanosome, which attacks the blood and nervous system of its victims, causing sleeping sickness in humans and nagana in livestock. The biting tsetse fly transmits it when its seeks a blood meal. Despite various drastic efforts over the past 100 years to eradicate the tsetse fly, most of the time it has recovered. The tsetse, about the size of a house fly, infests 37 sub-Saharan African countries - 32 of them among the 42 most Heavily Indebted Poor Countries (HIPCs) in the world. Much of Africa's best land - particularly in river valleys and moist areas, where the potential for mixed farming is good - lies uncultivated, while tsetse free areas face collapse from overuse by humans. The range of the fly is expanding and in some parts of Africa renewed outbreaks of sleeping sickness are killing more people than any other disease. In 1997 the Tanzanian island of Zanzibar was declared free of the tsetse after conventional methods reduced its numbers and the release of hundreds of thousands of infertile male flies into the wild - sterilized using a nuclear technology - clinched its success. In Burkina Faso in 2001, the Organization of African Unity, inaugurated the Pan African Tsetse and Trypanosomosis Eradication Campaign (PATTEC), based on the successful Zanzibar program

  13. Estimating the Turn-around Radii of Six Isolated Galaxy Groups in the Local Universe

    Science.gov (United States)

    Lee, Jounghun

    2018-03-01

    Estimates of the turn-around radii of six isolated galaxy groups in the nearby universe are presented. From the Tenth Data Release of the Sloan Digital Sky Survey, we first select those isolated galaxy groups at redshifts z ≤ 0.05 in the mass range [0.3–1] × {10}14 {h}-1 {M}ȯ whose nearest-neighbor groups are located at distances larger than 15 times their virial radii. Then, we search for a gravitationally interacting web-like structure around each isolated group, which appears as an inclined streak pattern in the anisotropic spatial distribution of the neighboring field galaxies. Out of 59 isolated groups, only seven are found to possess such web-like structures in their neighbor zones, but one of them turns out to be NGC 5353/4, whose turn-around radius was already measured in a previous work and was thus excluded from our analysis. Applying the Turn-around Radius Estimator algorithm devised by Lee et al. to the identified web-like structures of the remaining six target groups, we determine their turn-around radii and show that three out of the six targets have larger turn-around radii than the spherical bound limit predicted by Planck cosmology. We discuss possible sources of the apparent violations of the three groups, including the underestimated spherical bound limit due to the approximation of the turn-around mass by the virial mass.

  14. Virtual reality training improves turning capacity and functional reach in stroke patients

    International Nuclear Information System (INIS)

    Malik, A.N.; Masood, T.

    2017-01-01

    Objective: To determine the added effects of virtual reality training on turning capacity, gait parameters and functional reach capacity of stroke patients compared to task oriented training alone. Methodology: A randomized control trial was conducted from February 2016 to July 2106 at Physical Rehabilitation Department Pakistan Railway Hospital, Rawalpindi, Pakistan. Twenty stroke patients were selected through purposive sampling. The patients were randomly assigned through sealed envelope method into two groups; Task Oriented Training (TOT) and Virtual Reality Training (VRT) Group. The standardized tools were used for assessment. The TOT was provided for 4 days per week for 6 weeks while VRT group received additional exer-gaming training during sessions. Results: Significant improvement was observed in both groups regarding reaching forward, turning 360, gait pivot turn (p a 0.01) and FRT (p a 0.001). The two groups were statistically different from each other in terms of turning capacity, reaching forward, gait pivot turn and functional reach after 6 weeks of intervention (p a 0.05) Conclusion: Addition of virtual reality training further improves the significant improvement caused by task oriented training on turning capacity, reaching forward, gait pivot turn and functional reach in stroke patients. (author)

  15. As the egg turns: monitoring egg attendance behavior in wild birds using novel data logging technology.

    Science.gov (United States)

    Shaffer, Scott A; Clatterbuck, Corey A; Kelsey, Emma C; Naiman, Alex D; Young, Lindsay C; VanderWerf, Eric A; Warzybok, Pete; Bradley, Russell; Jahncke, Jaime; Bower, Geoff C

    2014-01-01

    Egg turning is unique to birds and critical for embryonic development in most avian species. Technology that can measure changes in egg orientation and temperature at fine temporal scales (1 Hz) was neither readily available nor small enough to fit into artificial eggs until recently. Here we show the utility of novel miniature data loggers equipped with 3-axis (i.e., triaxial) accelerometers, magnetometers, and a temperature thermistor to study egg turning behavior in free-ranging birds. Artificial eggs containing egg loggers were deployed in the nests of three seabird species for 1-7 days of continuous monitoring. These species (1) turned their eggs more frequently (up to 6.5 turns h(-1)) than previously reported for other species, but angular changes were often small (1-10° most common), (2) displayed similar mean turning rates (ca. 2 turns h(-1)) despite major differences in reproductive ecology, and (3) demonstrated distinct diurnal cycling in egg temperatures that varied between 1.4 and 2.4 °C. These novel egg loggers revealed high-resolution, three-dimensional egg turning behavior heretofore never measured in wild birds. This new form of biotechnology has broad applicability for addressing fundamental questions in avian breeding ecology, life history, and development, and can be used as a tool to monitor birds that are sensitive to disturbance while breeding.

  16. As the egg turns: monitoring egg attendance behavior in wild birds using novel data logging technology.

    Directory of Open Access Journals (Sweden)

    Scott A Shaffer

    Full Text Available Egg turning is unique to birds and critical for embryonic development in most avian species. Technology that can measure changes in egg orientation and temperature at fine temporal scales (1 Hz was neither readily available nor small enough to fit into artificial eggs until recently. Here we show the utility of novel miniature data loggers equipped with 3-axis (i.e., triaxial accelerometers, magnetometers, and a temperature thermistor to study egg turning behavior in free-ranging birds. Artificial eggs containing egg loggers were deployed in the nests of three seabird species for 1-7 days of continuous monitoring. These species (1 turned their eggs more frequently (up to 6.5 turns h(-1 than previously reported for other species, but angular changes were often small (1-10° most common, (2 displayed similar mean turning rates (ca. 2 turns h(-1 despite major differences in reproductive ecology, and (3 demonstrated distinct diurnal cycling in egg temperatures that varied between 1.4 and 2.4 °C. These novel egg loggers revealed high-resolution, three-dimensional egg turning behavior heretofore never measured in wild birds. This new form of biotechnology has broad applicability for addressing fundamental questions in avian breeding ecology, life history, and development, and can be used as a tool to monitor birds that are sensitive to disturbance while breeding.

  17. The kink-turn motif in RNA is dimorphic, and metal ion-dependent

    Science.gov (United States)

    GOODY, TERRY A.; MELCHER, SONYA E.; NORMAN, DAVID G.; LILLEY, DAVID M.J.

    2004-01-01

    The kink-turn (K-turn) is a new motif in RNA structure that was identified by examination of the crystal structures of the ribosome. We examined the structural and dynamic properties of this element in free solution. The K-turn RNA exists in a dynamic equilibrium between a tightly kinked conformation and a more open structure similar to a simple bulge bend. The highly kinked form is stabilized by the noncooperative binding of metal ions, but a significant population of the less-kinked form is present even in the presence of relatively high concentrations of divalent metal ions. The conformation of the tightly kinked population is in excellent agreement with that of the K-turn structures observed in the ribosome by crystallography. The end-to-end FRET efficiency of this species agrees closely with that of the ribosomal K-turn, and the direction of the bend measured by comparative gel electrophoresis also corresponds very well. These results show that the tightly kinked conformation of the K-turn requires stabilization by other factors, possibly by protein binding, for example. The K-turn is therefore unlikely to be of itself a primary organizing feature in RNA. PMID:14730024

  18. Defining the nature and implications of head turn preference in the preterm infant.

    Science.gov (United States)

    Dunsirn, Sonya; Smyser, Christopher; Liao, Steve; Inder, Terrie; Pineda, Roberta

    2016-05-01

    To determine the relationship of head turn preference in the preterm infant to: 1) perinatal medical factors, 2) neonatal neurobehavior, and/or 3) infant neurodevelopmental outcomes. Seventy preterm infants born ≤30weeks gestation were enrolled at birth. Detailed information regarding neonatal intensive care unit (NICU) medical course was compiled for each infant. Neurobehavioral testing was performed during NICU hospitalization. Head turn preference was quantified at term equivalent age using a newly developed scale. Infants returned at age two years for standardized developmental testing. All infants demonstrated a head turning preference, with most preferring the right side (n=51, 77%). Fifty-five infants (79%) had moderate to severe head turn preference. Head turn preference was associated with 1) medical severity (hours of inotrope use, p=0.02; oxygen requirement at 36weeks postmenstrual age, p=0.03), 2) worse neurobehavioral performance (decreased self-regulation, p=0.007; more sub-optimal reflexes p=0.006), and 3) worse developmental outcome at age two years (poorer fine motor, p=0.02). Medical factors in the NICU appear to be associated with the development of a head turn preference. Increased severity of head turn preference may be a marker for poor developmental outcome. Early identification may inform therapeutic interventions designed to minimize symptoms and optimize neurodevelopmental outcome. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

  19. As the Egg Turns: Monitoring Egg Attendance Behavior in Wild Birds Using Novel Data Logging Technology

    Science.gov (United States)

    Shaffer, Scott A.; Clatterbuck, Corey A.; Kelsey, Emma C.; Naiman, Alex D.; Young, Lindsay C.; VanderWerf, Eric A.; Warzybok, Pete; Bradley, Russell; Jahncke, Jaime; Bower, Geoff C.

    2014-01-01

    Egg turning is unique to birds and critical for embryonic development in most avian species. Technology that can measure changes in egg orientation and temperature at fine temporal scales (1 Hz) was neither readily available nor small enough to fit into artificial eggs until recently. Here we show the utility of novel miniature data loggers equipped with 3-axis (i.e., triaxial) accelerometers, magnetometers, and a temperature thermistor to study egg turning behavior in free-ranging birds. Artificial eggs containing egg loggers were deployed in the nests of three seabird species for 1–7 days of continuous monitoring. These species (1) turned their eggs more frequently (up to 6.5 turns h−1) than previously reported for other species, but angular changes were often small (1–10° most common), (2) displayed similar mean turning rates (ca. 2 turns h−1) despite major differences in reproductive ecology, and (3) demonstrated distinct diurnal cycling in egg temperatures that varied between 1.4 and 2.4°C. These novel egg loggers revealed high-resolution, three-dimensional egg turning behavior heretofore never measured in wild birds. This new form of biotechnology has broad applicability for addressing fundamental questions in avian breeding ecology, life history, and development, and can be used as a tool to monitor birds that are sensitive to disturbance while breeding. PMID:24887441

  20. Ground reaction forces and lower-limb joint kinetics of turning gait in typically developing children.

    Science.gov (United States)

    Dixon, Philippe C; Stebbins, Julie; Theologis, Tim; Zavatsky, Amy B

    2014-11-28

    Turning is a common locomotor task essential to daily activity; however, very little is known about the forces and moments responsible for the kinematic adaptations occurring relative to straight-line gait in typically developing children. Thus, the aims of this study were to analyse ground reaction forces (GRFs), ground reaction free vertical torque (TZ), and the lower-limb joint kinetics of 90° outside (step) and inside (spin) limb turns. Step, spin, and straight walking trials from fifty-four typically developing children were analysed. All children were fit with the Plug-in Gait and Oxford Foot Model marker sets while walking over force plates embedded in the walkway. Net internal joint moments and power were computed via a standard inverse dynamics approach. All dependent variables were statistically analysed over the entire curves using the mean difference 95% bootstrap confidence band approach. GRFs were directed medially for step turns and laterally for spin turns during the turning phase. Directions were reversed and magnitudes decreased during the approach phase. Step turns showed reduced ankle power generation, while spin turns showed large TZ. Both strategies required large knee and hip coronal and transverse plane moments during swing. These kinetic differences highlight adaptations required to maintain stability and reorient the body towards the new walking direction during turning. From a clinical perspective, turning gait may better reveal weaknesses and motor control deficits than straight walking in pathological populations, such as children with cerebral palsy, and could potentially be implemented in standard gait analysis sessions. Copyright © 2014 Elsevier Ltd. All rights reserved.

  1. Muscle activity in the slalom turn of alpine skiing and in-line skating.

    Science.gov (United States)

    Zeglinksi, C M; Swanson, S C; Self, B P; Greenwald, R M

    1998-10-01

    The electromyographic (EMG) activity of seven muscles of the trunk and lower extremity in five male masters level ski racers during a slalom turn in both alpine skiing and in-line skating was recorded using a telemetry system. Measurements were made on separate testing days using slopes commonly used in each activity (24 slope alpine skiing, 5 in-line skating). Qualitative video recorded at 60 Hz was analyzed to partition the turning cycle in both slalom skiing and in-line skating into initiation and turning phases. The EMG data from each turning cycle were normalized to standard isometric contractions (SIC's) for each muscle in order to quantitatively compare the amplitude characteristics of each phase of the turning cycle in both slalom skiing and in-line skating. The turning phase of in-line skating was found to be significantly longer (55%) than in slalom skiing, most likely due to significantly lower subject velocities recorded during in-line skating (8.5 m/s vs 10.2 m/s). All muscles were active at moderate to high levels (48-172% of SIC) during each phase of the turning cycle in both slalom skiing and in-line skating. The EMG amplitude characteristics were similar for six of the muscles in both slalom skiing and in-line skating for each of the turning phases. Only the erector spinae displayed significantly higher average and peak amplitudes in slalom skiing for both phases. It is concluded that the muscle activity patterns associated with the slalom turn of in-line skating are similar but notably more quasi-static than in slalom skiing.

  2. The Third Turn toward the Social: Nancy Welch's "Living Room," Tony Scott's "Dangerous Writing," and Rhetoric and Composition's Turn toward Grassroots Political Activism

    Science.gov (United States)

    Kinney, Kelly; Girshin, Thomas; Bowlin, Barrett

    2013-01-01

    This review essay examines recent texts by Nancy Welch and Tony Scott, both of which use embodied activism as a starting point for their inquiries. Taken together, these works point to a distinct shift in composition studies' turn toward the social, one that calls on workers both within and outside the academy to actively engage in grassroots…

  3. A gate drive circuit for gate-turn-off (GTO) devices in series stack

    International Nuclear Information System (INIS)

    Despe, O.

    1999-01-01

    A gate-turn-off (GTO) switch is under development at the Advanced Photon Source as a replacement for a thyratron switch in high power pulsed application. The high voltage in the application requires multiple GTOs connected in series. One component that is critical to the success of GTO operation is the gate drive circuit. The gate drive circuit has to provide fast high-current pulses to the GTO gate for fast turn-on and turn-off. It also has to be able to operate while floating at high voltage. This paper describes a gate drive circuit that meets these requirements

  4. A novel method for calculating the energy cost of turning during running

    Directory of Open Access Journals (Sweden)

    Hatamoto Y

    2013-05-01

    Full Text Available Yoichi Hatamoto,1 Yosuke Yamada,2 Tatsuya Fujii,3 Yasuki Higaki,3 Akira Kiyonaga,3 Hiroaki Tanaka31Graduate School of Sports and Health Science, Fukuoka University, Nanakuma Jonan-ku Fukuoka, Japan; 2The Fukuoka University Institute for Physical Activity, Nanakuma Jonan-ku Fukuoka, Japan; 3Faculty of Sports and Health Science, Fukuoka University, Nanakuma Jonan-ku Fukuoka, JapanAbstract: Although changes of direction are one of the essential locomotor patterns in ball sports, the physiological demand of turning during running has not been previously investigated. We proposed a novel approach by which to evaluate the physiological demand of turning. The purposes of this study were to establish a method of measuring the energy expenditure (EE of a 180° turn during running and to investigate the effect of two different running speeds on the EE of a 180° turn. Eleven young, male participants performed measurement sessions at two different running speeds (4.3 and 5.4 km/hour. Each measurement session consisted of five trials, and each trial had a different frequency of turns. At both running speeds, as the turn frequency increased the gross oxygen consumption (V · O2 also increased linearly (4.3 km/hour, r = 0.973; 5.4 km/hour, r = 0.996. The V · O2 of a turn at 5.4 km/hour (0.55 [SD 0.09] mL/kg was higher than at 4.3 km/hour (0.34 [SD 0.13] mL/kg (P < 0.001. We conclude that the gross V · O2 of running at a fixed speed with turns is proportional to turn frequency and that the EE of a turn is different at different running speeds. The Different Frequency Accumulation Method is a useful tool for assessing the physiological demands of complex locomotor activity.Keywords: energy expenditure, turning, turn frequency, running speed, V · O2, heart rate

  5. Investigation of the flow turning loss in unstable solid propellant rocket motors

    Science.gov (United States)

    Matta, Lawrence Mark

    The goal of this study was to improve the understanding of the flow turning loss, which contributes to the damping of axial acoustic instabilities in solid propellant rocket motors. This understanding is needed to develop practical methods for designing motors that do not exhibit such instabilities. The flow turning loss results from the interaction of the flow of combustion products leaving the surface of the propellant with the acoustic field in an unstable motor. While state of the art solid rocket stability models generally account for the flow turning loss, its magnitude and characteristics have never been fully investigated. This thesis describes a combined theoretical, numerical, and experimental investigation of the flow turning loss and its dependence upon various motor design and operating parameters. First, a one dimensional acoustic stability equation that verifies the existence of the flow turning loss was derived for a chamber with constant mean pressure and temperature. The theoretical development was then extended to include the effects of mean temperature gradients to accommodate combustion systems in which mean temperature gradients and heat losses are significant. These analyses provided the background and expressions necessary to guide an experimental study. The relevant equations were then solved for the developed experimental setup to predict the behavior of the flow turning loss and the other terms of the developed acoustic stability equation. This was followed by and experimental study in which the flow turning region of an unstable solid propellant rocket motor was simulated. The setup was used, with and without combustion, to determine the dependence of the flow turning loss upon operating conditions. These studies showed that the flow turning loss strongly depends upon the gas velocity at the propellant surface and the location of the flow turning region relative to the standing acoustic wave. The flow turning loss measured in the

  6. Efficiency analysis of the speed turns in the crawl stroke swimming.

    Directory of Open Access Journals (Sweden)

    Savchenko M.I.

    2011-02-01

    Full Text Available Contemporary approaches to improving technique of the speed in the crawl stroke swimming, namely roll-forward turn were considered in the paper. The performance efficiency is defined by the time covering 15 meter distance. The students of the sports mastering group aged 16-20 took part in the experiment. The video recordings of the Ukrainian, European and World Championships and Deflympic Games, and also chronometration during the department trainings served as the experimental data. The research showed that white improving the technical level of turns performance, the attention should be paid to the exact performance of all the elements of the turns.

  7. Joint physical custody, turning to parents for emotional support, and subjective health: A study of adolescents in Stockholm, Sweden.

    Science.gov (United States)

    Låftman, Sara Brolin; Bergström, Malin; Modin, Bitte; Östberg, Viveca

    2014-07-01

    Among children with separated parents, the arrangement of joint physical custody, i.e. children living equally much in both parents' homes, has increased substantially during the last decades in Sweden. To date, empirical research on the living conditions of this group is limited. This study analyses family type differences in turning to parents for emotional support and in subjective health among adolescents. The focus of the study is adolescents in joint physical custody, who are compared with those living with two original parents in the same household; those living (only) in a single-parent household; and those living (only) in a reconstituted family. The data come from the Stockholm School Survey of 2004, a total population survey of students in grade 9 (15-16 years) in Stockholm (n=8,840). Ordinary least squares (OLS) regressions were conducted. Turning to both parents about problems is most commonly reported by adolescents in intact families, followed by those in joint physical custody. Adolescents in non-traditional family types report worse subjective health than adolescents in intact families, but the difference is smaller for those in joint physical custody than for those living with a single parent. The slightly poorer health of adolescents in joint physical custody than those in intact families is not explained by their lower use of parents as a source of emotional support. The study suggests that joint physical custody is associated with a higher inclination to use parents as a source of emotional support and better subjective health than other post-divorce family types. © 2014 the Nordic Societies of Public Health.

  8. Turning point

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2000-06-30

    A conference of delegates from First Nations communities in coastal British Columbia was held in May 2000 in Vancouver to discuss how they could work together to ensure the protection of ancestral lands and waters for future generations. The conference also provided the opportunity for the First Nations representatives to sign a declaration articulating their collective responsibilities as stewards of the land and expressing strong commitment to cooperation on a regional basis to approach settlement of issues regarding forestry and fisheries in ways that benefit both the communities and the environment. Delegates also expressed frustration with government and industry who continue to make decisions about resources on traditional lands ignoring the constitutional rights of First Nations peoples. The discussions reflected participants' intense concern about current resource management practices to sustain either the ecological system of the region or the communities dependent on them for their livelihood and their cultural identity.

  9. Tight turns

    CERN Multimedia

    Anaïs Schaeffer

    2012-01-01

    The Italian National Institute for Nuclear Physics (INFN) has successfully tested the first model of a new fast-ramping curved dipole magnet. This is great news for CERN, which sees the advance as holding potential for the future of the SPS.   The first model of a new fast-ramping curved dipole magnet being prepared for cryogenic testing at the LASA laboratory (INFN Milano, Italy). On 16 July INFN introduced an innovative dipole magnet. With a length of some 4 metres, it can produce a 4.5 Tesla magnetic field and achieve a tighter bend than ever before (the bending radius has been squeezed to a remarkable 66.7 metres). This new magnet was designed in the first instance for GSI’s SIS300 synchrotron (in Germany), which will require 60 dipoles of this type. "Achieving such a tight bend demanded a major R&D effort," stressed Pasquale Fabbricatore, the spokesman of the INFN collaboration responsible for the magnet’s development. "We had to not o...

  10. Phase Retrieval System for Assessing Diamond Turning and Optical Surface Defects

    Science.gov (United States)

    Dean, Bruce; Maldonado, Alex; Bolcar, Matthew

    2011-01-01

    An optical design is presented for a measurement system used to assess the impact of surface errors originating from diamond turning artifacts. Diamond turning artifacts are common by-products of optical surface shaping using the diamond turning process (a diamond-tipped cutting tool used in a lathe configuration). Assessing and evaluating the errors imparted by diamond turning (including other surface errors attributed to optical manufacturing techniques) can be problematic and generally requires the use of an optical interferometer. Commercial interferometers can be expensive when compared to the simple optical setup developed here, which is used in combination with an image-based sensing technique (phase retrieval). Phase retrieval is a general term used in optics to describe the estimation of optical imperfections or aberrations. This turnkey system uses only image-based data and has minimal hardware requirements. The system is straightforward to set up, easy to align, and can provide nanometer accuracy on the measurement of optical surface defects.

  11. State-of-the-art literature review on permissive/protected left-turn control.

    Science.gov (United States)

    2013-06-01

    In spring 2010, the Illinois Department of Transportation initiated an areawide implementation to integrate the : flashing yellow arrow as the display for the left-turn permissive interval at more than 100 intersections operating : with protected/per...

  12. Right-Turn Traffic Volume Adjustments in Traffic Signal Warrant Analysis

    Science.gov (United States)

    2015-01-01

    To accomplish this research, a comprehensive literature review of existing guidelines and findings based on national and local studies was conducted. Ultimately, guidelines for consistent application for adjusting right-turn traffic volumes were deve...

  13. Very High Load Capacity Air Bearing Spindle for Large Diamond Turning Machines Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Diamond turning is able to produce highly aspheric visible quality optics which can be easily aligned. Very large optical systems such as OWL and EUSO are impossible...

  14. Quench analysis of pancake wound REBCO coils with low resistance between turns

    International Nuclear Information System (INIS)

    Markiewicz, W Denis; Jaroszynski, Jan J; Abraimov, Dymtro V; Joyner, Rachel E; Khan, Amanatullah

    2016-01-01

    Quench in a pancake wound REBCO superconducting coil with low resistance (LR) between turns is examined by numerical analysis. In these calculations it is generally observed that once established, quench propagates rapidly in LR coils. Large transients are induced in the azimuthal solenoid current, allowed by the LR between turns, and become self-propagating. The transition from an initial state characterized by thermal diffusion to the dynamic inductive state of quench propagation is observed. The analysis is applied to the inner coil of a 30 T magnet where the quench performance is studied as a function of the value of resistance between turns. Rapid propagation of quench is seen in calculations for resistance between turns significantly greater than the resistance reported for no-insulation coils. The influence on quench of both steel co-wind and the amount of copper in the conductor is examined through calculation of the maximum temperature and the quench propagation velocity. (paper)

  15. Decision tree learning for detecting turning points in business process orientation: a case of Croatian companies

    Directory of Open Access Journals (Sweden)

    Ljubica Milanović Glavan

    2015-03-01

    Full Text Available Companies worldwide are embracing Business Process Orientation (BPO in order to improve their overall performance. This paper presents research results on key turning points in BPO maturity implementation efforts. A key turning point is defined as a component of business process maturity that leads to the establishment and expansion of other factors that move the organization to the next maturity level. Over the past few years, different methodologies for analyzing maturity state of BPO have been developed. The purpose of this paper is to investigate the possibility of using data mining methods in detecting key turning points in BPO. Based on survey results obtained in 2013, the selected data mining technique of classification and regression trees (C&RT was used to detect key turning points in Croatian companies. These findings present invaluable guidelines for any business that strives to achieve more efficient business processes.

  16. Vehicle kinematics in turns and the role of cornering lamps in driver vision.

    Science.gov (United States)

    2010-11-01

    "SAE Recommended Practice J852 and ECE Regulations 119 and 48 for cornering lamps : were compared. Photometric points described in each specification were then compared : to naturalistic low-speed turn trajectories produced by 87 drivers. Future loca...

  17. Quench analysis of pancake wound REBCO coils with low resistance between turns

    Science.gov (United States)

    Markiewicz, W. Denis; Jaroszynski, Jan J.; Abraimov, Dymtro V.; Joyner, Rachel E.; Khan, Amanatullah

    2016-02-01

    Quench in a pancake wound REBCO superconducting coil with low resistance (LR) between turns is examined by numerical analysis. In these calculations it is generally observed that once established, quench propagates rapidly in LR coils. Large transients are induced in the azimuthal solenoid current, allowed by the LR between turns, and become self-propagating. The transition from an initial state characterized by thermal diffusion to the dynamic inductive state of quench propagation is observed. The analysis is applied to the inner coil of a 30 T magnet where the quench performance is studied as a function of the value of resistance between turns. Rapid propagation of quench is seen in calculations for resistance between turns significantly greater than the resistance reported for no-insulation coils. The influence on quench of both steel co-wind and the amount of copper in the conductor is examined through calculation of the maximum temperature and the quench propagation velocity.

  18. EPA Region 8, Memo on Desktop Printer Ink Cartridges Policy & Voluntary Printer Turn-in

    Science.gov (United States)

    This memo requests EPA Region 8 users to voluntarily turn-in their desktop printers and notifies users of the Region 8 policy to not provide maintenance or ink and toner cartridges for desktop printers.

  19. Turn-key Near-Infrared Photon-Counting Detector Module for LIDAR Applications, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — We propose to design and deliver a turn-key photon counting detector module for near-infrared wavelengths, based on large-area InGaAs/InP avalanche photodiodes...

  20. Analytical and Empirical Modeling of Wear and Forces of CBN Tool in Hard Turning - A Review

    Science.gov (United States)

    Patel, Vallabh Dahyabhai; Gandhi, Anishkumar Hasmukhlal

    2017-08-01

    Machining of steel material having hardness above 45 HRC (Hardness-Rockwell C) is referred as a hard turning. There are numerous models which should be scrutinized and implemented to gain optimum performance of hard turning. Various models in hard turning by cubic boron nitride tool have been reviewed, in attempt to utilize appropriate empirical and analytical models. Validation of steady state flank and crater wear model, Usui's wear model, forces due to oblique cutting theory, extended Lee and Shaffer's force model, chip formation and progressive flank wear have been depicted in this review paper. Effort has been made to understand the relationship between tool wear and tool force based on the different cutting conditions and tool geometries so that appropriate model can be used according to user requirement in hard turning.

  1. Experimental investigation of residual stress distribution during turning of weak stiffness revolving parts

    Science.gov (United States)

    Jiao, Sicheng; Zhang, Chengyan; Liu, Guancheng; Lu, Jiping; Tang, Shuiyuan

    2017-08-01

    A series of turning experiments have been carried out to study the effect of different cutting speed, feed rate and pre-tightening torque on residual stress distribution during turning of weak stiffness revolving parts. Surface residual stress and the peak residual compressive stress are selected from the typical residual stress distribution profile. The residual stress by turning was measured by X-ray diffraction method. In order to get the distribution of residual stress along depth direction, the specimens need to be etched layer by layer. From this investigation, it can be concluded that it is practicable to control the distribution of residual stress by changing the pre-tightening torque and cutting parameters during turning of weak stiffness revolving parts.

  2. A turn-on fluorescent sensor for the discrimination of cystein from homocystein and glutathione.

    Science.gov (United States)

    Niu, Li-Ya; Guan, Ying-Shi; Chen, Yu-Zhe; Wu, Li-Zhu; Tung, Chen-Ho; Yang, Qing-Zheng

    2013-02-14

    We report a turn-on fluorescent sensor based on nitrothiophenolate boron dipyrromethene (BODIPY) derivatives for the discrimination of cystein (Cys) from homocystein (Hcy) and glutathione (GSH). The sensor was applied for detection of Cys in living cells.

  3. Required coefficient of friction during turning at self-selected slow, normal, and fast walking speeds.

    Science.gov (United States)

    Fino, Peter; Lockhart, Thurmon E

    2014-04-11

    This study investigated the relationship of required coefficient of friction to gait speed, obstacle height, and turning strategy as participants walked around obstacles of various heights. Ten healthy, young adults performed 90° turns around corner pylons of four different heights at their self selected normal, slow, and fast walking speeds using both step and spin turning strategies. Kinetic data was captured using force plates. Results showed peak required coefficient of friction (RCOF) at push off increased with increased speed (slow μ=0.38, normal μ=0.45, and fast μ=0.54). Obstacle height had no effect on RCOF values. The average peak RCOF for fast turning exceeded the OSHA safety guideline for static COF of μ>0.50, suggesting further research is needed into the minimum static COF to prevent slips and falls, especially around corners. Copyright © 2014 Elsevier Ltd. All rights reserved.

  4. Turning point revisited: launching the next generation of performance management in public health.

    Science.gov (United States)

    DeAngelo, Julia W; Beitsch, Leslie M; Beaudry, Margaret L; Corso, Liza C; Estes, Larissa J; Bialek, Ron G

    2014-01-01

    A decade ago, the Turning Point Performance Management Excellence Collaborative (Turning Point) developed the first public health-specific performance management (PM) system, with accompanying resource materials, assisted by the Public Health Foundation. Since then, dramatic advancements in PM and quality improvement activities have occurred in public health. Public Health Foundation gathered data that revealed Turning Point was still relevant but difficult to implement within public health. To reflect recent advances and current challenges, Public Health Foundation refreshed the Turning Point model and related guidance tools and developed new resources to facilitate PM implementation. In addition, a new fifth component, "Visible Leadership," was added to the 4-quadrant model and the Self-Assessment Tool. In the future, public health organizations should take an active leadership role in innovating and sustaining PM systems, ensuring they become accountable for producing outcomes, leveraging technology advances, and incorporating best practices from all stakeholders.

  5. Very High Load Capacity Air Bearing Spindle for Large Diamond Turning Machines, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — Diamond turning is able to produce highly aspheric visible quality optics which can be easily aligned. Very large optical systems such as OWL and EUSO are impossible...

  6. Influence of increased rotational inertia on the turning performance of humans.

    Science.gov (United States)

    Lee, D V; Walter, R M; Deban, S M; Carrier, D R

    2001-11-01

    The rotational inertia of an animal can be expected to influence directly its ability to execute rapid turning maneuvers. We hypothesized that a ninefold increase in rotational inertia would reduce maximum turning performance to one-ninth of control values. To test this prediction, we increased rotational inertia about the vertical axis of six human subjects and measured their ability to turn during maximum-effort jump turns. We measured the free moment about a vertical (i.e. yaw) axis as the subjects performed maximum-effort jump turns under three conditions: (i) unencumbered, (ii) wearing a backpack with a control weight and (iii) wearing a backpack of the same mass that increased the rotational inertia of the subject to 9.2 times that with the control weight. Rotational inertia measurements allowed us to estimate the angle turned during the take-off period (i.e. from jump initiation until the feet leave the ground) and the angular power and work of the maximum-effort turns. Surprisingly, the angle turned during take-off in the increased inertia trials was 44.7 % of that of the control trials, rather than the 10.9 % (9.2-fold reduction) expected on the basis of the increase in rotational inertia. When the subjects turned with increased rotational inertia, the maximum and mean torques exerted were, on average, 142 % and 190 %, respectively, of the values recorded during the control trials. Maximum torques during increased rotational inertia trials actually approached isometric maxima. In the increased rotational inertia trials, the angular impulse was 252 % of that of the control trials and the take-off period was 130 % of that of the control trials. By exerting larger torques over longer take-off periods, the subjects were able partially to compensate for the excess rotational inertia. In contrast to the observed changes in torque, maximum and mean angular power were highest in the unencumbered trials and lowest in the increased inertia trials. On the basis of a

  7. Same menu, seperate tables : the institutionalist turn in political science and the study of European integration

    OpenAIRE

    Aspinwall, Mark D.; Schneider, Gerald

    2000-01-01

    Recent research on European integration has largely profited from the institutionalist turn in political science. Theoretical progress has, however, been hampered by the diverse understandings of this new research tradition. This paper tries to tackle the conceptual diversity in a positive way. We first analyze the neo-institutionalist turn in political science and European studies and then move on to a detailed analysis and comparison of the three competing approaches sociological, histori...

  8. Turn Motors Off When Not in Use - Motor Tip Sheet #10

    Energy Technology Data Exchange (ETDEWEB)

    None

    2008-07-01

    Motors use no energy when turned off. Reducing motor operating time by just 10% usually saves more energy than replacing a standard efficiency motor with a NEMA Premium® efficiency motor. In fact, given that 97% of the life cycle cost of purchasing and operating a motor is energy-related, turning a motor off 10% of the time could reduce energy costs enough to purchase three new motors.

  9. YIELDING BEHAVIOR OF TURNING VEHICLE DRIVER ON CROSSWALK AT SIGNALIZED INTERSECTION

    OpenAIRE

    HASINA, IASMIN

    2016-01-01

    Conflicts between Pedestrians/cyclists and tuning vehicles are very common at signalized intersection. Such conflicts increase the likelihood for a crash to occur. Since a crosswalk is the place designated for pedestrians to cross the road safely, the maneuvering of turning vehicles at crosswalks is characterized by their compliance with the priority rule: in interactions between turning vehicles and pedestrians on a crosswalk, the pedestrians should be allowed to pass first. Accident data re...

  10. As the Egg Turns: Monitoring Egg Attendance Behavior in Wild Birds Using Novel Data Logging Technology

    OpenAIRE

    Shaffer, Scott A.; Clatterbuck, Corey A.; Kelsey, Emma C.; Naiman, Alex D.; Young, Lindsay C.; VanderWerf, Eric A.; Warzybok, Pete; Bradley, Russell; Jahncke, Jaime; Bower, Geoff C.

    2014-01-01

    Egg turning is unique to birds and critical for embryonic development in most avian species. Technology that can measure changes in egg orientation and temperature at fine temporal scales (1 Hz) was neither readily available nor small enough to fit into artificial eggs until recently. Here we show the utility of novel miniature data loggers equipped with 3-axis (i.e., triaxial) accelerometers, magnetometers, and a temperature thermistor to study egg turning behavior in free-ranging birds. Art...

  11. Improving the safety of patient turning and repositioning tasks for caregivers.

    Science.gov (United States)

    Fragala, Guy; Fragala, Maren

    2014-07-01

    Current evidence demonstrates why turning and positioning patients in bed presents a serious occupational risk of musculoskeletal disorders for caregivers. Results of the laboratory study investigating a new method of turning and positioning patients in bed are presented. The study was designed to evaluate how this new method reduced the risk of occupational musculoskeletal disorders to caregivers and may improve outcomes for patients. Copyright 2014, SLACK Incorporated.

  12. Innovations Under the Concept of ‘Turning Garbage into Gold’ in Fisheries Waste Management

    OpenAIRE

    Yusuf, Muhammad

    2013-01-01

    This paper discusses the encouragement of creativity and innovation in creating opportunities for entrepreneurship turning useless materials into valuable resources. It is necessary to know the thought process and planning in the entrepreneurship idea to create a new business at this time. One of the brilliant philosophies about entrepreneurs is that they are those who can “turn garbage into gold”. This concept describes the important character of entrepreneurs who foresee business opportunit...

  13. The influence of rear turn-signal characteristics on crash risk.

    Science.gov (United States)

    Sullivan, John M; Flannagan, Michael J

    2012-02-01

    The relationship between the relative risk of a rear-end collision during a turn, merge, or lane change maneuver and the characteristics of the rear turn-signal configuration was examined using crash data from seven states in the United States. Rear turn-signal characteristics-including color, optics, separation, and light source-were identified for 55 vehicle models and used in a logistic regression analysis to model the odds of a rear-end collision. Additional variables including driver demographics (gender, age), vehicle age, and light condition were also modeled. Risk was assessed using a contrast group of striking vehicles in similar collisions. The results suggest that the odds of being the struck vehicle were 3% to 28% lower among vehicles equipped with amber versus red turn signals. Although the analysis suggests that there may be a safety benefit associated with amber rear turn signals, it is unclear whether turn-signal color alone is responsible. The results suggest that aspects of a vehicle's rear signal characteristics may influence crash risk. Copyright © 2012 Elsevier Ltd. All rights reserved.

  14. Turning frequency in adult bedridden patients to prevent hospital-acquired pressure ulcer: A scoping review.

    Science.gov (United States)

    Jocelyn Chew, H-S; Thiara, Emelia; Lopez, Violeta; Shorey, Shefaly

    2018-04-01

    The aim of this study was to identify current research on turning frequencies of adult bed-bound patients and inform future turning practices for hospitals based on evidence-based practice. We undertook a scoping review framework that provided a transparent and systematic methodology using 8 electronic databases (CINAHL, PubMed, Cochrane Library, ScienceDirect, PsycINFO, Scopus, ProQuest, and Web of Science) to identify articles published from 2000 to 2016. Articles were included if they focused on the prevention of hospital-acquired pressure ulcers related to the frequency of turning or repositioning of bed-bound patients. Literature search and data extraction were performed independently by 3 authors. The study followed the PRISMA guidelines. In total, 911 articles were identified, of which 10 were eligible. Of the eligible articles, 8 studies could not reach a conclusion on the effective frequency of turning and duration for repositioning patients to prevent the development of pressure ulcers. Only 2 studies found significant differences among the intervention and control groups. Results regarding turning and repositioning schedules are inconclusive; however, the topic needs further exploration to improve the outdated guidelines surrounding pressure ulcer prevention. This may, in turn, make the work of nurses more efficient and make treatment cost-effective for both the patients and the hospitals. © 2017 Medicalhelplines.com Inc and John Wiley & Sons Ltd.

  15. Universal compact lower limb turning module intended for use in orthotic robots

    Directory of Open Access Journals (Sweden)

    Janowski Mateusz

    2018-01-01

    Full Text Available In this paper, a model of an orthotic robot’s lower limb rotation system is presented. The system is intended for use in typical contemporary orthotic robots such as the ‘Veni-Prometheus’ System for Verticalization and Aiding Motion designed at the Faculty of Mechatronics, Warsaw University of Technology. In the paper, the state of the art is briefly stated, with the relatively low number of orthotic robots allowing realization of pivoting turns highlighted. The intended two-stage pivoting turning movement is analyzed in detail and the operating conditions as well as limitations of the turning module are indicated. The conception of a turning module introduces additional degree of freedom to the existing orthotic robot designs by realizing the rotation about the lengthwise axis in the thigh link. A three-dimensional model and its analysis are shown. The proposed design ensures the necessary movement of the lower limb and the torso of an impaired person during the execution of pivoting turn while remaining compact in order to ease the introduction of the turning system to different orthotic robot designs.

  16. Development of robust HTS-SQUID for non-destructive inspection system in unshielded environment

    International Nuclear Information System (INIS)

    Yoshida, K; Kage, T; Suzuki, T; Hatsukade, Y; Tanaka, S

    2014-01-01

    Cross-shaped YBa 2 Cu 3 O 7−x (YBCO) film was overlapped on directly-coupled multi-pickup-coil HTS-dc-SQUID magnetometer in flip-chip configuration as a superconducting shield, and the characterestics of the SQUID were examined in DC and AC magnetic fields. We created slots in the YBCO film and pickup-coil of HTS-SQUID magnetometer for suppression of flux trapping. In low magnetic field environment, we measured the characteristics of the SQUID without and with HTS film. The most of the parameters were same with and without the HTS films, while S 1/2 φ with the HTS film was a bit smaller than that of the bare SQUID. In the DC field, I c of the HTS-SQUID covered with the HTS film did not change until a DC field over 140 μT was applied to the SQUID, while the bare SQUID's I c decreased with the increase of the applied DC field. In the AC fields at 10 MHz, the SQUID with the HTS film showed degradation of the parameters such as V pp and S 12 φ at lower field amplitude than the bare SQUID.

  17. How Users Search the Library from a Single Search Box

    Science.gov (United States)

    Lown, Cory; Sierra, Tito; Boyer, Josh

    2013-01-01

    Academic libraries are turning increasingly to unified search solutions to simplify search and discovery of library resources. Unfortunately, very little research has been published on library user search behavior in single search box environments. This study examines how users search a large public university library using a prominent, single…

  18. Juan José Saer’s La grande: another turn, the last, spiral one

    Directory of Open Access Journals (Sweden)

    Adriana Mancini

    2012-12-01

    Full Text Available Juan José Saer (1937–2005 was born in the province of Santa Fe, located in the river coastal region of Argentina, and lived there until 1968. He then moved to Paris until his death, where he also wrote most of his works. His literary project is based on a region – the zone – which represents simultaneously geography and existence: it has a real point of reference, a portion of the Santa Fe riverside area of the Paraná river, and also it is a condition for the opportunity for a conversation between friends; a debate over the representational possibilities of language, the relationship between literature and reality, the twists and turns of philosophy. The characters, native to that region, appear throughout his work; they grow old along with their maker. Each novel completes fictional configurations, progresses both in its conflicts and in those of the group they make up. Their Leitmotiven are remembrance, memory, perception and representation of time in several manifestations. La grande, a posthumous novel, is considered a compendium of Saer’s works. It is composed of seven chapters named after the days of the week, from Tuesday to Monday. The last chapter, Monday, which Saer may have conceived as a coda, consists of a single line. His death does away with time bringing an end to his literary project. This paper comprises an analysis of temporal representation in the novel: the aging of the characters in the saga; the construction of space-time coordinates for narrative development, the formal means used for its representation, the embedding of the historical time through references to Argentina’s last dictatorship, and the functionality of the reference to the days of the week for identifying the respective chapters, both in the context of the novel and the author’s work as a whole.

  19. Preparing printed circuit boards for rapid turn-around time on a protomat plotter

    International Nuclear Information System (INIS)

    Hawtree, J.

    1998-01-01

    This document describes the use of the LPKF ProtoMat mill/drill unit circuit board Plotter, with the associated CAD/CAM software BoardMaster and CircuitCAM. At present its primarily use here at Fermilab's Particle Physics Department is for rapid-turnover of prototype PCBs double-sided and single-sided copper clad printed circuit boards (PCBs). (The plotter is also capable of producing gravure films and engraving aluminum or plastic although we have not used it for this.) It has the capability of making traces 0.004 inch wide with 0.004 inch spacings which is appropriate for high density surface mount circuits as well as other through-mounted discrete and integrated components. One of the primary benefits of the plotter is the capability to produce double-sided drilled boards from CAD files in a few hours. However to achieve this rapid turn-around time, some care must be taken in preparing the files. This document describes how to optimize the process of PCB fabrication. With proper preparation, researchers can often have a completed circuit board in a day's time instead of a week or two wait with usual procedures. It is assumed that the software and hardware are properly installed and that the machinist is acquainted with the Win95 operating system and the basics of the associated software. This paper does not describe its use with pen plotters, lasers or rubouts. The process of creating a PCB (printed circuit board) begins with the CAD (computer-aided design) software, usually PCAD or VeriBest. These files are then moved to CAM (computer-aided machining) where they are edited and converted to put them into the proper format for running on the ProtoMat plotter. The plotter then performs the actual machining of the board. This document concentrates on the LPKF programs CircuitCam BASIS and BoardMaster for the CAM software. These programs run on a Windows 95 platform to run an LPKF ProtoMat 93s plotter

  20. The turn team: a novel strategy for reducing pressure ulcers in the surgical intensive care unit.

    Science.gov (United States)

    Still, Mary D; Cross, Linda C; Dunlap, Martha; Rencher, Rugenia; Larkins, Elizabeth R; Carpenter, David L; Buchman, Timothy G; Coopersmith, Craig M

    2013-03-01

    Pressure ulcers cause significant morbidity and mortality in the surgical intensive care unit (SICU). The purpose of this study was to determine if a dedicated team tasked with turning and repositioning all hemodynamically stable SICU patients could decrease the formation of pressure ulcers. A total of 507 patients in a 20-bed SICU in a university hospital were assessed for pressure ulcers using a point prevalence strategy, between December 2008 and September 2010, before and after implementation of a team tasked with turning and repositioning all hemodynamically stable patients every 2 hours around the clock. At baseline, when frequent turning was encouraged but not required, a total of 42 pressure ulcers were identified in 278 patients. After implementation of the turn team, a total of 12 pressure ulcers were identified in 229 patients (p < 0.0001). The preintervention group included 34 stage I and II ulcers and 8 higher stage ulcers. After implementation of the turn team, there were 7 stage I and II ulcers and 5 higher stage ulcers. The average Braden score was 16.5 in the preintervention group and 13.4 in the postintervention group (p = 0.04), suggesting that pressure ulcers were occurring in higher risk patients after implementation of the turn team. A team dedicated to turning SICU patients every 2 hours dramatically decreased the incidence of pressure ulcers. The majority of stage I and stage II ulcers appear to be preventable with an aggressive intervention aimed at pressure ulcer prevention. Copyright © 2013 American College of Surgeons. Published by Elsevier Inc. All rights reserved.

  1. Dance for Parkinson's-The effects on whole body co-ordination during turning around.

    Science.gov (United States)

    Hulbert, Sophia; Ashburn, Ann; Roberts, Lisa; Verheyden, Geert

    2017-06-01

    To investigate the effects of ballroom and Latin American dancing classes on turning in people with Parkinson's. This study employed a randomised, controlled, experimental design. Dance classes were performed in a community dance centre in Southern England and all assessments took place a gait laboratory. Twenty-seven people with mild-moderate Parkinson's participated. Participants were randomly allocated to receive either 20, 1-h dancing classes over 10 weeks (n=15), or a 'usual care' control group (n=12). Twelve, 180° on-the-spot turns to the predicted/un-predicted and preferred/un-preferred direction were analysed for each participant, using 3-dimensional motion analysis before and after the intervention period, alongside clinical measures. Movement of the head, pelvis, and feet during turning in people with Parkinson's are affected by dancing with tighter coupling of body segments. Significant 4-way interactions between the groups, over time and turn style, with longer latency of the head (p=0.008) and greater rotation in the pelvis (p=0.036), alongside a trend of slower movement of the first (p=0.063) and second (p=0.081) foot in controls were shown, with minimal change in dancers. All interactions were affected by the type of turn. No significant differences were found in the centre of mass displacement, turn time or clinical measures. Those who danced were better able to coordinate their axial and perpendicular segments and surprisingly became more 'en bloc' in their turning behaviour, suggesting this may be a beneficial adaptation, rather than a maladaptive result of Parkinson's, as previously suggested. Copyright © 2017 Elsevier Ltd. All rights reserved.

  2. When Big Ice Turns Into Water It Matters For Houses, Stores And Schools All Over

    Science.gov (United States)

    Bell, R. E.

    2017-12-01

    When ice in my glass turns to water it is not bad but when the big ice at the top and bottom of the world turns into water it is not good. This new water makes many houses, stores and schools wet. It is really bad during when the wind is strong and the rain is hard. New old ice water gets all over the place. We can not get to work or school or home. We go to the big ice at the top and bottom of the world to see if it will turn to water soon and make more houses wet. We fly over the big ice to see how it is doing. Most of the big ice sits on rock. Around the edge of the big sitting on rock ice, is really low ice that rides on top of the water. This really low ice slows down the big rock ice turning into water. If the really low ice cracks up and turns into little pieces of ice, the big rock ice will make more houses wet. We look to see if there is new water in the cracks. Water in the cracks is bad as it hurts the big rock ice. Water in the cracks on the really low ice will turn the low ice into many little pieces of ice. Then the big rock ice will turn to water. That is water in cracks is bad for the houses, schools and businesses. If water moves off the really low ice, it does not stay in the cracks. This is better for the really low ice. This is better for the big rock ice. We took pictures of the really low ice and saw water leaving. The water was not staying in the cracks. Water leaving the really low ice might be good for houses, schools and stores.

  3. Suspending the next turn as a form of repair initiation: evidence from Argentine Sign Language

    Directory of Open Access Journals (Sweden)

    Elizabeth eManrique

    2015-09-01

    Full Text Available Practices of other-initiated repair deal with problems of hearing or understanding what another person has said in the fast-moving turn-by-turn flow of conversation. As such, other-initiated repair plays a fundamental role in the maintenance of intersubjectivity in social interaction. This study finds and analyses a special type of other-initiated repair that is used in turn-by-turn conversation in a sign language: Argentine Sign Language (Lengua de Señas Argentina or LSA. We describe a type of response termed a ‘freeze-look’, which occurs when a person has just been asked a direct question: instead of answering the question in the next turn position, the person holds still while looking directly at the questioner. In these cases it is clear that the person is aware of having just been addressed and is not otherwise accounting for their delay in responding (e.g., by displaying a ‘thinking’ face or hesitation, etc.. We find that this behavior functions as a way for an addressee to initiate repair by the person who asked the question. The ‘freeze-look’ results in the questioner ‘re-doing’ their action of asking a question, for example by repeating or rephrasing it. Thus we argue that the ‘freeze-look’ is a practice for other-initiation of repair. In addition, we argue that it is an ‘off-record’ practice, thus contrasting with known on-record practices such as saying ‘Huh?’ or equivalents. The findings aim to contribute to research on human understanding in everyday turn-by-turn conversation by looking at an understudied sign language, with possible implications for our understanding of visual bodily communication in spoken languages as well.

  4. Extended turn construction and test question sequences in the conversations of three speakers with agrammatic aphasia.

    Science.gov (United States)

    Beeke, Suzanne; Beckley, Firle; Best, Wendy; Johnson, Fiona; Edwards, Susan; Maxim, Jane

    2013-01-01

    The application of Conversation Analysis (CA) to the investigation of agrammatic aphasia reveals that utterances produced by speakers with agrammatism engaged in everyday conversation differ significantly from utterances produced in response to decontextualised assessment and therapy tasks. Early studies have demonstrated that speakers with agrammatism construct turns from sequences of nouns, adjectives, discourse markers and conjunctions, packaged by a distinct pattern of prosody. This article presents examples of turn construction methods deployed by three people with agrammatism as they take an extended turn, in order to recount a past event, initiate a discussion or have a disagreement. This is followed by examples of sequences occurring in the talk of two of these speakers that result in different, and more limited, turn construction opportunities, namely "test" questions asked in order to initiate a new topic of talk, despite the conversation partner knowing the answer. The contrast between extended turns and test question sequences illustrates the effect of interactional context on aphasic turn construction practices, and the potential of less than optimal sequences to mask turn construction skills. It is suggested that the interactional motivation for test question sequences in these data are to invite people with aphasia to contribute to conversation, rather than to practise saying words in an attempt to improve language skills. The idea that test question sequences may have their origins in early attempts to deal with acute aphasia, and the potential for conversation partnerships to become "stuck" in such interactional patterns after they may have outlived their usefulness, are discussed with a view to clinical implications.

  5. Suspending the next turn as a form of repair initiation: evidence from Argentine Sign Language

    Science.gov (United States)

    Manrique, Elizabeth; Enfield, N. J.

    2015-01-01

    Practices of other-initiated repair deal with problems of hearing or understanding what another person has said in the fast-moving turn-by-turn flow of conversation. As such, other-initiated repair plays a fundamental role in the maintenance of intersubjectivity in social interaction. This study finds and analyses a special type of other-initiated repair that is used in turn-by-turn conversation in a sign language: Argentine Sign Language (Lengua de Señas Argentina or LSA). We describe a type of response termed a “freeze-look,” which occurs when a person has just been asked a direct question: instead of answering the question in the next turn position, the person holds still while looking directly at the questioner. In these cases it is clear that the person is aware of having just been addressed and is not otherwise accounting for their delay in responding (e.g., by displaying a “thinking” face or hesitation, etc.). We find that this behavior functions as a way for an addressee to initiate repair by the person who asked the question. The “freeze-look” results in the questioner “re-doing” their action of asking a question, for example by repeating or rephrasing it. Thus, we argue that the “freeze-look” is a practice for other-initiation of repair. In addition, we argue that it is an “off-record” practice, thus contrasting with known on-record practices such as saying “Huh?” or equivalents. The findings aim to contribute to research on human understanding in everyday turn-by-turn conversation by looking at an understudied sign language, with possible implications for our understanding of visual bodily communication in spoken languages as well. PMID:26441710

  6. Experimental study of the diamond turning characteristics of tungsten carbide (Co 0.5%) when using a chamfered diamond bite

    Science.gov (United States)

    Kim, Min Jae; Lee, June Key; Hwang, Yeon; Cha, Du Hwan; Kim, Hye Jeong; Kim, Jeong Ho

    2012-11-01

    Tungsten carbide (WC) is a widely used as a mold material for fabrication of glass lens because of its superior properties. Due to its extremely high hardness (R c > 90), an abrasive machining process, although unproductive and expensive, is used to fabricate the mold. In this research, the authors investigated the machining possibility of tungsten carbide by single-point diamond turning (SPDT) for fabricating high-quality optical surfaces directly. A finite element analysis (FEA) was carried out in order to investigate the effects of the chamfered length on the cutting forces and the strain rate of single-crystal diamond tools. The obtained FEA results showed that a smaller chamfered length decreased the bite strain rate. The performance characteristics in terms of surface roughness (R a ) and tool wear (VB max ) of a conventional bite and a chamfered bite under same machining conditions were studied, the results were compared. Experimental results suggest that the chamfered bite wased a better performance than the conventional bite in terms of tool wear resistance. The WC surface machined by using the chamfered bite showed a 2.26 nm roughness (R a ), which is suitable for the fabrication of glass lenses.

  7. Use of an in-field-of-view shield to improve count rate performance of the single crystal layer high-resolution research tomograph PET scanner for small animal brain scans

    International Nuclear Information System (INIS)

    Boellaard, R; Jong, H W A M de; Molthoff, C F M; Buijs, F; Lenox, M; Nutt, R; Lammertsma, A A

    2003-01-01

    The count rate performance of the single LSO crystal layer high-resolution research tomograph (HRRT-S) PET scanner is limited by the processing speed of its electronics. Therefore, the feasibility of using an in-field-of-view (in-FOV) shield to improve the noise equivalent count rates (NECR) for small animal brain studies was investigated. The in-FOV shield consists of a lead tube of 12 cm length, 6 cm inner diameter and 9 mm wall thickness. It is large enough to shield the activity in the body of a rat or mouse. First, the effect of this shield on NECR was studied. Secondly, a number of experiments were performed to assess the effects of the shield on the accuracy of transmission scan data and, next, on reconstructed activity distribution in the brain. For activities below 150 MBq NECR improved only by 5-10%. For higher activities NECR maxima of 1.2E4 cps at 200 MBq and 2.2E4 cps at 370 MBq were found without and with shield, respectively. Listmode data taken without shield, however, were corrupted for activities above 75 MBq due to data overrun problems (time tag losses) of the electronics. When the shield was used data overrun was avoided up to activities of 150 MBq. For the unshielded part of the phantom, transmission scan data were the same with and without shield. The estimated scatter contribution was approximately 8.5% without and 5.5% with shield. Reconstructed emission data showed a difference up to 5% in the unshielded part of the phantom at 5 mm or more from the edge of the shielding. Of this 5% about 3% results from the difference in the uncorrected scatter contribution. In conclusion, an in-FOV shield can be used successfully in an HRRT PET scanner to improve NECR and accuracy of small animal brain studies. The latter is especially important when high activities are required for tracers with low brain uptake or when multiple animals are scanned simultaneously. (note)

  8. A-minor tertiary interactions in RNA kink-turns. Molecular dynamics and quantum chemical analysis.

    Science.gov (United States)

    Réblová, Kamila; Šponer, Judit E; Špačková, Naďa; Beššeová, Ivana; Šponer, Jiří

    2011-12-01

    The RNA kink-turn is an important recurrent RNA motif, an internal loop with characteristic consensus sequence forming highly conserved three-dimensional structure. Functional arrangement of RNA kink-turns shows a sharp bend in the phosphodiester backbone. Among other signature interactions, kink-turns form A-minor interaction between their two stems. Most kink-turns possess extended A-minor I (A-I) interaction where adenine of the second A•G base pair of the NC-stem interacts with the first canonical pair of the C-stem (i.e., the receptor pair) via trans-sugar-edge/sugar-edge (tSS) and cis-sugar-edge/sugar-edge (cSS) interactions. The remaining kink-turns have less compact A-minor 0 (A-0) interaction with just one tSS contact. We show that kink-turns with A-I in ribosomal X-ray structures keep G═C receptor base pair during evolution while the inverted pair (C═G) is not realized. In contrast, kink-turns with A-0 in the observed structures alternate G═C and C═G base pairs in sequences. We carried out an extended set (~5 μs) of explicit-solvent molecular dynamics simulations of kink-turns to rationalize this structural/evolutionary pattern. The simulations were done using a net-neutral Na(+) cation atmosphere (with ~0.25 M cation concentration) supplemented by simulations with either excess salt KCl atmosphere or inclusion of Mg(2+). The results do not seem to depend on the treatment of ions. The simulations started with X-ray structures of several kink-turns while we tested the response of the simulated system to base substitutions, modest structural perturbations and constraints. The trends seen in the simulations reveal that the A-I/G═C arrangement is preferred over all three other structures. The A-I/C═G triple appears structurally entirely unstable, consistent with the covariation patterns seen during the evolution. The A-0 arrangements tend to shift toward the A-I pattern in simulations, which suggests that formation of the A-0 interaction is

  9. Turning movements, vehicle offsets and ageing drivers driving behaviour at channelized and unchannelized intersections.

    Science.gov (United States)

    Choi, Jaisung; Tay, Richard; Kim, Sangyoup; Jeong, Seungwon

    2017-11-01

    Ageing drivers experience a higher risk of intersection crashes because of their decrease in driving efficiency, including the decline in cognitive ability, head and neck flexibility, and visual acuity. Although several studies have been conducted to examine the factors associated with ageing driver crashes at intersections, little research has been conducted to examine the differences in the factors related to ageing drivers' turning paths and intersection geometric features. This study aims to improve the safety of ageing drivers at intersections by identifying the maneuvers that are risky for them and tracking their turning movements at selected intersections. We find that ageing drivers experience more crashes at intersections than younger drivers, especially crashes involving turning movements. Furthermore, ageing drivers experience more crashes at unchannelized intersections compared to channelized intersections. In addition, this study finds that ageing drivers exhibit greater and more inconsistent offsets during turning movements compared to those of younger drivers at both channelized and unchannelized intersections. Ageing drivers also tend to make relatively sharper or tighter turns than younger drivers. Hence, transportation engineers and road safety professionals should consider appropriate countermeasures to reduce the risks of crashes involving ageing drivers at intersections. Copyright © 2017 Elsevier Ltd. All rights reserved.

  10. Effects of auditory cues on gait initiation and turning in patients with Parkinson's disease.

    Science.gov (United States)

    Gómez-González, J; Martín-Casas, P; Cano-de-la-Cuerda, R

    2016-12-08

    To review the available scientific evidence about the effectiveness of auditory cues during gait initiation and turning in patients with Parkinson's disease. We conducted a literature search in the following databases: Brain, PubMed, Medline, CINAHL, Scopus, Science Direct, Web of Science, Cochrane Database of Systematic Reviews, Cochrane Library Plus, CENTRAL, Trip Database, PEDro, DARE, OTseeker, and Google Scholar. We included all studies published between 2007 and 2016 and evaluating the influence of auditory cues on independent gait initiation and turning in patients with Parkinson's disease. The methodological quality of the studies was assessed with the Jadad scale. We included 13 studies, all of which had a low methodological quality (Jadad scale score≤2). In these studies, high-intensity, high-frequency auditory cues had a positive impact on gait initiation and turning. More specifically, they 1) improved spatiotemporal and kinematic parameters; 2) decreased freezing, turning duration, and falls; and 3) increased gait initiation speed, muscle activation, and gait speed and cadence in patients with Parkinson's disease. We need studies of better methodological quality to establish the Parkinson's disease stage in which auditory cues are most beneficial, as well as to determine the most effective type and frequency of the auditory cue during gait initiation and turning in patients with Parkinson's disease. Copyright © 2016 Sociedad Española de Neurología. Publicado por Elsevier España, S.L.U. All rights reserved.

  11. Reduced turning frequency and delayed poultry manure addition reduces N loss from sugarcane compost.

    Science.gov (United States)

    Bryndum, S; Muschler, R; Nigussie, A; Magid, J; de Neergaard, A

    2017-07-01

    Composting is an effective method to recycle biodegradable waste as soil amendment in smallholder farming systems. Although all essential plant nutrients are found in compost, a substantial amount of nitrogen is lost during composting. This study therefore investigated the potential of reducing N losses by (i) delaying the addition of nitrogen-rich substrates (i.e. poultry manure), and (ii) reducing the turning frequency during composting. Furthermore, we tested the effect of compost application method on nitrogen mineralization. Sugarcane-waste was composted for 54days with addition of poultry manure at the beginning (i.e. early addition) or after 21days of composting (delayed addition). The compost pile was then turned either every three or nine days. Composts were subsequently applied to soil as (i) homogeneously mixed, or (ii) stratified, and incubated for 28days to test the effect of compost application on nitrogen mineralization. The results showed that delayed addition of poultry manure reduced total nitrogen loss by 33% and increased mineral nitrogen content by >200% compared with early addition. Similarly, less frequent turning reduced total N loss by 12% compared with frequent turning. Stratified placement of compost did not enhance N mineralization compared to a homogeneous mixing. Our results suggested that simple modifications of the composting process (i.e. delayed addition and/or turning frequency) could significantly reduce N losses and improve the plant-nutritional value of compost. Copyright © 2017 Elsevier Ltd. All rights reserved.

  12. Effect of the starting and turning performances on the subsequent swimming parameters of elite swimmers.

    Science.gov (United States)

    Veiga, Santiago; Roig, Andreu

    2017-03-01

    In the present research, we examined the effect of the starting and turning performances on the subsequent swimming parameters by (1) comparing the starting and turning velocities with the swimming parameters on the emersion and mid-pool segments and (2) by relating the individual behaviour of swimmers during the start and turns with subsequent behaviour on each swimming lap. One hundred and twelve 100 m performances on the FINA 2013 World Swimming Championships were analysed by an image-processing system (InThePool 2.0®). At the point of the start emersion, the swimming parameters of the 100-m elite swimmers were substantially greater than the mid-pool parameters, except on the breaststroke races. On the other hand, no diminution in the swimming parameters was observed between the turn emersion and the mid-pool swimming, except on the butterfly and backstroke male races. Changes on the surface swimming kinematics were not generally related to the starting or turning parameters, although male swimmers who develop faster starts seem to achieve faster velocities at emersion. Race analysts should be aware of a transfer of momentum when swimmers emerge from underwater with implications on the subsequent swimming kinematics, especially for male swimmers who employ underwater undulatory techniques.

  13. Travel Time Model for Right-Turning Vehicles of Secondary Street at Unsignalized Intersections

    Directory of Open Access Journals (Sweden)

    Feng Yu-Qin

    2013-01-01

    Full Text Available The travel time of right-turning vehicles on secondary street at unsignalized intersection is discussed in this paper. Under the assumption that the major-street through vehicles’ headway follows Erlang distribution and secondary-street right-turning vehicles’ headway follows Poisson distribution. The right-turning vehicles travel time model is established on the basis of gap theory and M/G/1 queue theory. Comparison is done with the common model based on the assumption that the major-street vehicles’ headway follows Poisson distribution. An intersection is selected to verify each model. The results show that the model established in this paper has stronger applicability, and its most relative error is less than 15%. In addition, the sensitivity analysis has been done. The results show that right-turning flow rate and major-street flow rate have a significant impact on the travel time. Hence, the methodology for travel time of right-turning vehicles at unsignalized intersection proposed in this paper is effective and applicable.

  14. Surface quality and topographic inspection of variable compliance part after precise turning

    Science.gov (United States)

    Nieslony, P.; Krolczyk, G. M.; Wojciechowski, S.; Chudy, R.; Zak, K.; Maruda, R. W.

    2018-03-01

    The paper presents the problem of precise turning of the mould parts with variable compliance and demonstrates a topographic inspection of the machined surface quality. The study was conducted for the cutting tools made of cemented carbide with coatings, in a range of variable cutting parameters. The long shaft with special axial hole, made of hardened 55NiCrMoV6 steel was selected as a workpiece. The carried out study included the stiffness measurement of the machining system, as well as the investigation of cutting force components. In this context, the surface topography parameters were evaluated using the stylus profile meter and analysed. The research revealed that the surface topography, alongside the 3D functional parameters, and PSD influences the performance of the machined surface. The lowest surface roughness parameters values, equalled to Sa = 1 μm and Sz = 4.3 μm have been obtained during turning with cutting speed vc = 90 m/min. The stable turning of variable compliance part affects the surface texture formation with a unidirectional perpendicular, anisotropic structure. Nevertheless, in case of unstable turning, the characteristic chatter marks are observed, and process dynamics has greater contribution in formation of surface finish than turning kinematics and elastic plastic deformation of workpiece.

  15. Predicting beta-turns in proteins using support vector machines with fractional polynomials

    Science.gov (United States)

    2013-01-01

    Background β-turns are secondary structure type that have essential role in molecular recognition, protein folding, and stability. They are found to be the most common type of non-repetitive structures since 25% of amino acids in protein structures are situated on them. Their prediction is considered to be one of the crucial problems in bioinformatics and molecular biology, which can provide valuable insights and inputs for the fold recognition and drug design. Results We propose an approach that combines support vector machines (SVMs) and logistic regression (LR) in a hybrid prediction method, which we call (H-SVM-LR) to predict β-turns in proteins. Fractional polynomials are used for LR modeling. We utilize position specific scoring matrices (PSSMs) and predicted secondary structure (PSS) as features. Our simulation studies show that H-SVM-LR achieves Qtotal of 82.87%, 82.84%, and 82.32% on the BT426, BT547, and BT823 datasets respectively. These values are the highest among other β-turns prediction methods that are based on PSSMs and secondary structure information. H-SVM-LR also achieves favorable performance in predicting β-turns as measured by the Matthew's correlation coefficient (MCC) on these datasets. Furthermore, H-SVM-LR shows good performance when considering shape strings as additional features. Conclusions In this paper, we present a comprehensive approach for β-turns prediction. Experiments show that our proposed approach achieves better performance compared to other competing prediction methods. PMID:24565438

  16. Timing in turn-taking and its implications for processing models of language

    Science.gov (United States)

    Levinson, Stephen C.; Torreira, Francisco

    2015-01-01

    The core niche for language use is in verbal interaction, involving the rapid exchange of turns at talking. This paper reviews the extensive literature about this system, adding new statistical analyses of behavioral data where they have been missing, demonstrating that turn-taking has the systematic properties originally noted by Sacks et al. (1974; hereafter SSJ). This system poses some significant puzzles for current theories of language processing: the gaps between turns are short (of the order of 200 ms), but the latencies involved in language production are much longer (over 600 ms). This seems to imply that participants in conversation must predict (or ‘project’ as SSJ have it) the end of the current speaker’s turn in order to prepare their response in advance. This in turn implies some overlap between production and comprehension despite their use of common processing resources. Collecting together what is known behaviorally and experimentally about the system, the space for systematic explanations of language processing for conversation can be significantly narrowed, and we sketch some first model of the mental processes involved for the participant preparing to speak next. PMID:26124727

  17. Changes in inertia and effect on turning effort across different wheelchair configurations.

    Science.gov (United States)

    Caspall, Jayme J; Seligsohn, Erin; Dao, Phuc V; Sprigle, Stephen

    2013-01-01

    When executing turning maneuvers, manual wheelchair users must overcome the rotational inertia of the wheelchair system. Differences in wheelchair rotational inertia can result in increases in torque required to maneuver, resulting in greater propulsion effort and stress on the shoulder joints. The inertias of various configurations of an ultralightweight wheelchair were measured using a rotational inertia-measuring device. Adjustments in axle position, changes in wheel and tire type, and the addition of several accessories had various effects on rotational inertias. The configuration with the highest rotational inertia (solid tires, mag wheels with rearward axle) exceeded the configuration with the lowest (pneumatic tires, spoke wheels with forward axle) by 28%. The greater inertia requires increased torque to accelerate the wheelchair during turning. At a representative maximum acceleration, the reactive torque spanned the range of 11.7 to 15.0 N-m across the wheelchair configurations. At higher accelerations, these torques exceeded that required to overcome caster scrub during turning. These results indicate that a wheelchair's rotational inertia can significantly influence the torque required during turning and that this influence will affect active users who turn at higher speeds. Categorizing wheelchairs using both mass and rotational inertia would better represent differences in effort during wheelchair maneuvers.

  18. SEARCHING FOR CRITERIA IN EVALUATING THE MONOFIN SWIMMING TURN FROM THE PERSPECTIVE OF COACHING AND IMPROVING TECHNIQUE

    Directory of Open Access Journals (Sweden)

    Marek Rejman

    2008-03-01

    Full Text Available This study aims to analysise the selected kinematic parameters of the monofin swimming turn. The high complexity of performing turns is hindered by the large surface of the monofin, which disturbs control and sense of the body in water. A lack of objective data available on monofin swimming turns has resulted in field research connected with the specification of parameters needed for the evaluation of the technique. Therefore, turns observed in elite swimmers contain underlying conclusions for objective criteria, ensuring the highest level of coaching and the improving of turns in young swimmers. Six, high level, male swimmers participated in the study. The subject of the analysis was the fastest turn, from one out of three trial turns made after swimming a distance of 25 m. Images of the turns were collected from two cameras located under water in accordance with the procedures of the previous analyses of freestyle turns. The images were digitized and analysed by the SIMI®- Movement Analysis System. The interdependency of the total turn time and the remaining recorded parameters, constituted the basis for analysis of the kinematic parameters of five turn phases. The interdependency was measured using r- Pearson's correlation coefficients. The novel character of the subject covered in this study, forced interpretation of the results on the basis of turn analyses in freestyle swimming. The results allow for the creation of a diagram outlinig area of search for an effective and efficient monofin swimming turn mechanism. The activities performed from the moment of wall contact until the commencement of stroking seem to be crucial for turn improvement. A strong belief has resulted that, the correct monofin swimming turn, is more than just a simple consequence of the fastest performance of all its components. The most important criteria in evaluating the quality of the monofin swimming turn are: striving for the optimal extension of wall contact

  19. Wide Input Range Power Converters Using a Variable Turns Ratio Transformer

    DEFF Research Database (Denmark)

    Ouyang, Ziwei; Andersen, Michael A. E.

    2016-01-01

    of diagonal secondary windings, in order to make the transformer turns ratio adjustable by controlling the phase between the two current excitations subjected to the two primary windings. Full-bridge boost dc-dc converter is employed with the proposed transformer to demonstrate the feasibility of the variable......A new integrated transformer with variable turns ratio is proposed to enable dc-dc converters operating over a wide input voltage range. The integrated transformer employs a new geometry of magnetic core with “four legs”, two primary windings with orthogonal arrangement, and “8” shape connection...... turns ratio. 1-kW experimental prototype targeting to the PV standalone system has been built to well demonstrate a wide input voltage operation with high efficiencies....

  20. Leveraging finances for public health system improvement: results from the Turning Point initiative.

    Science.gov (United States)

    Bekemeier, Betty; Riley, Catharine M; Berkowitz, Bobbie

    2007-01-01

    Reforming the public health infrastructure requires substantial system changes at the state level; state health agencies, however, often lack the resources and support for strategic planning and systemwide improvement. The Turning Point Initiative provided support for states to focus on large-scale system changes that resulted in increased funding for public health capacity and infrastructure development. Turning Point provides a test case for obtaining financial and institutional resources focused on systems change and infrastructure development-areas for which it has been historically difficult to obtain long-term support. The purpose of this exploratory, descriptive survey research was to enumerate the actual resources leveraged toward public health system improvement through the partnerships, planning, and implementation activities funded by the Robert Wood Johnson Foundation as a part of the Turning Point Initiative.

  1. Turning points and protective processes in the lives of people with chronic disabilities.

    Science.gov (United States)

    King, Gillian; Cathers, Tamzin; Brown, Elizabeth; Specht, Jacqueline A; Willoughby, Colleen; Polgar, Janice Miller; MacKinnon, Elizabeth; Smith, Linda K; Havens, Lisa

    2003-02-01

    In this qualitative study, the authors examined the nature of resilience in people with chronic disabilities. Fifteen people with disabilities identified the factors that helped or hindered them at major turning points, and the triggers and resolutions to these turning points. Turning points were emotionally compelling experiences and realizations that involved meaning acquired through the routes of belonging, doing, or understanding the self or the world. The major protective factors were social support, traits such as perseverance and determination, and spiritual beliefs. Three new protective processes were identified: replacing a loss with a gain (transcending), recognizing new things about oneself (self-understanding), and making decisions about relinquishing something in life (accommodating). These protective factors, processes, and ways in which people with disabilities draw sense and meaning in life have important implications for service delivery.

  2. A compact sector-type multi-turn time-of-flight mass spectrometer 'MULTUM II'

    International Nuclear Information System (INIS)

    Okumura, Daisuke; Toyoda, Michisato; Ishihara, Morio; Katakuse, Itsuo

    2004-01-01

    A new compact sector-type multi-turn time-of-flight mass spectrometer 'MULTUM II' was constructed. The ion optical system was simplified compared with former sector-type multi-turn time-of-flight mass spectrometer 'MULTUM Linear plus'. The multi-turn part of the new instruments consisted of only four toroidal electric sector fields. The mean radius of cylindrical electric sectors was 50 mm and the deflection angle was 157.1 deg. . The total flight path length of one cycle was 1.308 m. All ion optical elements were hanged on the top plate (480 mmx380 mm) of the vacuum housing. Variations of the mass resolution and ion transmission according to the number of cycles were determined. The mass resolution of 33,000 was achieved after 150 cycles

  3. Spontaneous perseverative turning in rats with radiation-induced hippocampal damage

    International Nuclear Information System (INIS)

    Mickley, G.A.; Ferguson, J.L.; Nemeth, T.J.; Mulvihill, M.A.; Alderks, C.E.

    1989-01-01

    This study found a new behavioral correlate of lesions specific to the dentate granule cell layer of the hippocampus: spontaneous perseverative turning. Irradiation of a portion of the neonatal rat cerebral hemispheres produced hypoplasia of the granule cell layer of the hippocampal dentate gyrus while sparing the rest of the brain. Radiation-induced damage to the hippocampal formation caused rats placed in bowls to spontaneously turn in long, slow bouts without reversals. Irradiated subjects also exhibited other behaviors characteristic of hippocampal damage (e.g., perseveration in spontaneous exploration of the arms of a T-maze, retarded acquisition of a passive avoidance task, and increased horizontal locomotion). These data extend previously reported behavioral correlates of fascia dentata lesions and suggest the usefulness of a bout analysis of spontaneous bowl turning as a measure of nondiscrete-trial spontaneous alternation and a sensitive additional indicator of radiation-induced hippocampal damage

  4. Optimization of machining parameters of turning operations based on multi performance criteria

    Directory of Open Access Journals (Sweden)

    N.K.Mandal

    2013-01-01

    Full Text Available The selection of optimum machining parameters plays a significant role to ensure quality of product, to reduce the manufacturing cost and to increase productivity in computer controlled manufacturing process. For many years, multi-objective optimization of turning based on inherent complexity of process is a competitive engineering issue. This study investigates multi-response optimization of turning process for an optimal parametric combination to yield the minimum power consumption, surface roughness and frequency of tool vibration using a combination of a Grey relational analysis (GRA. Confirmation test is conducted for the optimal machining parameters to validate the test result. Various turning parameters, such as spindle speed, feed and depth of cut are considered. Experiments are designed and conducted based on full factorial design of experiment.

  5. Characterization of vibratory turning in cutting zone using a pneumatic quick-stop device

    Directory of Open Access Journals (Sweden)

    Saeid Amini

    2017-04-01

    Full Text Available Shear angle and sticking length are two crucial parameters in mechanics of metal cutting. These two parameters directly influence machinability factors such as cutting forces. Thus, shear angle and sticking length were investigated in vibratory turning process by using a pneumatic quick-stop device which was designed and fabricated, in this study. After preparation of ultrasonic assisted turning set-up, experimental tests have been carried out on two types of steel: AISI-1060 and AISI 304. Accordingly, the process of chip formation in each particular cutting test was quickly stopped when deformed chip was still in contact with workpiece. As a result, it was revealed that added linear vibration leads the turning operation to be improved by increase of shear angle and decrease of sticking length. Moreover, the effect of ultrasonic vibration on cutting force and chip micro-hardness is evaluated.

  6. Vital New Matters: The Speculative Turn in the Study of Religion and Gender

    Directory of Open Access Journals (Sweden)

    Paul Reid-Bowen

    2011-08-01

    Full Text Available This article provides an introduction to a new trend in continental philosophy, the turn toward metaphysics, realism and speculative philosophy.  This stands in sharp contrast with the anitrealist and correlationist traditions that have held sway since Kant’s Copernican Revolution in 1781.  It is claimed that the study of religion and gender has been shaped by the antirealist legacy of Kant, but there are good reasons for taking account of the new ‘speculative turn’.  Two examples from the leading exponent of this turn, speculative realism, are introduced, and some provisional notes toward applying these to the gender-critical turn in the study of religion are considered.  Research notes on the current state of the Goddess movement serve as a test case for the introduction of an object-oriented ontology into religious and gender studies.

  7. Ants show a leftward turning bias when exploring unknown nest sites.

    Science.gov (United States)

    Hunt, Edmund R; O'Shea-Wheller, Thomas; Albery, Gregory F; Bridger, Tamsyn H; Gumn, Mike; Franks, Nigel R

    2014-12-01

    Behavioural lateralization in invertebrates is an important field of study because it may provide insights into the early origins of lateralization seen in a diversity of organisms. Here, we present evidence for a leftward turning bias in Temnothorax albipennis ants exploring nest cavities and in branching mazes, where the bias is initially obscured by thigmotaxis (wall-following) behaviour. Forward travel with a consistent turning bias in either direction is an effective nest exploration method, and a simple decision-making heuristic to employ when faced with multiple directional choices. Replication of the same bias at the colony level would also reduce individual predation risk through aggregation effects, and may lead to a faster attainment of a quorum threshold for nest migration. We suggest the turning bias may be the result of an evolutionary interplay between vision, exploration and migration factors, promoted by the ants' eusociality.

  8. The spatiotemporal constraint on the swimmer’s decision-making of turning

    Directory of Open Access Journals (Sweden)

    Thiago A. Costa de Oliveira

    2014-09-01

    Full Text Available This study investigated the swimmer’s decision-making process for turning, based on spatiotemporal informational variables. The men and women 50-metre front crawl and backstroke events were selected and analyzed using TACTO software. Participants included 120 adults of both genders aged between 20 and 70 years. The distance to the pool wall at which the swimmers initiated the turn was analyzed with regards to velocity and variability of previous displacement. These factors were split into four groups adopting, quartiles as the cut-off points. Results showed that for all conditions, the swimmers who showed a higher velocity and a lower variability of displacement decided to initiate the turn at a greater distance to the pool wall. Furthermore, the greater distance seemed to be associated with a more successful performance. These results suggest that swimmers should be attuned to spatiotemporal and spatial information in order to maximize their performance.

  9. The Turning Point for the Recent Acceleration of the Universe with a Cosmological Constant

    Directory of Open Access Journals (Sweden)

    Zhang T. X.

    2012-04-01

    Full Text Available The turning point and acceleration expansion of the universe are investigated according to the standard cosmological theory with a non-zero cosmological constant. Choosing the Hubble constant H 0 , the radius of the present universe R 0 , and the density parameter in matter Ω M , 0 as three independent parameters, we have analytically examined the other properties of the universe such as the density parameter in dark energy, the cosmologi- cal constant, the mass of the universe, the turning point redshift, the age of the present universe, and the time-dependent radius, expansion rate, velocity, and acceleration pa- rameter of the universe. It is shown that the turning point redshift is only dependent of the density parameter in matter, not explicitly on the Hubble constant and the radius of the present universe. The universe turned its expansion from past deceleration to recent acceleration at the moment when its size was about 3 / 5 of the present size if the density parameter in matter is about 0.3 (or the turning point redshift is 0.67. The expansion rate is very large in the early period and decreases with time to approach the Hubble constant at the present time. The expansion velocity exceeds the light speed in the early period. It decreases to the minimum at the turning point and then increases with time. The minimum and present expansion velocities are determined with the independent parameters. The solution of time-dependent radius shows the universe expands all the time. The universe with a larger present radius, smaller Hubble constant, and / or smaller density parameter in matter is elder. The universe with smaller density parameter in matter accelerates recently in a larger rate but less than unity.

  10. Misalignment of the Desired and Measured Center of Pressure Describes Falls Caused by Slip during Turning.

    Directory of Open Access Journals (Sweden)

    Takeshi Yamaguchi

    Full Text Available In this study, desired center of pressure (dCOP was introduced to evaluate dynamic postural stability. The dCOP is defined as a virtual point on the ground, where the moment around the body center of mass (COM becomes zero when dCOP and the measured COP (mCOP coincide. We hypothesized that, when the misalignment of the dCOP and mCOP (dCOP-mCOP increases up to a certain value due to a large perturbation during walking, it becomes difficult to make a compensatory step and to recover balance of COM and to continue gait. Here we tested this hypothesis in slipping during turning. The study involved twelve healthy young adult males with an average age of 21.5±1.9 yrs. The subjects were asked to (1 walk straight and turn 60 degrees to the right with the right foot (spin turn on a dry floor surface, and (2 walk straight and 60 degrees spin turn to the right on a slippery lubricated surface. The dCOP-mCOP during turning in the slip trial with fall were significantly larger, particularly in x-direction (i.e., the medial-lateral direction during straight walk, than that in no-slip trial and slip trial without fall. The receiver operating characteristic (ROC analysis indicated that the dCOP-mCOP in x-direction is good indicator of falling (area under the curve (AUC = 0.93 and the threshold in the dCOP-mCOP in x-direction to distinguish for fall or no-fall was 0.55 m. These results support our hypothesis in slipping during turning.

  11. [Spatial turn : Opportunity, challenge and methodological momentum for geographical health research].

    Science.gov (United States)

    Kistemann, Thomas; Schweikart, Jürgen

    2017-12-01

    The (re)-discovery of the spatial dimension in many sciences has been guided for some time under the designation "spatial turn". Immense progress in geographic information sciences (GIS), global positioning systems (GPS), remote sensing and computer-aided cartography, in addition to geostatistical methods such as spatial distribution analysis and trend analysis, multi-level analysis, spatial data-mining and agent-based modelling, has created entirely new opportunities for spatial analysis and the modelling of spatial, health-relevant processes. These methods are increasingly being employed in epidemiology, public health and healthcare research.In the fields of cultural and social sciences, "spatial turn" refers to a paradigm shift that recognizes that geographical space also has a social and cultural meaning. This spatial conception considers space not only as an empty container, but also as a result of social processes. The Euclidean space is extended by socially and culturally shaped spatial perceptions and constructions. The "spatial turn" as a paradigm shift is not limited to the fact that space itself becomes an object of advanced investigation methods. It is instead about approaching objects of research with spatial categories.In light of the "spatial turn", geographical health research is currently facing great opportunities, but also a double challenge: on the one hand, recognizing, mediating and making meaningful use of the new methodological possibilities. On the other hand, and in line with its self-conception as a part of the medical humanities, it is challenged to implement the "spatial turn" in its social and cultural-scientific dimension, to go beyond stereotypical reception and to meet the paradigmatic significance of "spatial turn".

  12. Start and turn performances of elite sprinters at the 2016 European Championships in swimming.

    Science.gov (United States)

    Morais, Jorge E; Marinho, Daniel A; Arellano, Raul; Barbosa, Tiago M

    2018-03-26

    The aim of this study was to examine the performance characteristics of male and female finalists in the 100-m distance at the 2016 European Championships in swimming (long-course-metre). The performances of all 64 (32-males and 32-females) were analysed (8 swimmers per event; Freestyle, Backstroke, Breaststroke and Butterfly). A set of start and turn parameters were analysed. In the start main outcome, male swimmers were faster in Butterfly (5.71 ± 0.14s) and females in Freestyle (6.68 ± 0.28s). In the turn main outcome, male and female swimmers were faster in Freestyle (males: 9.55 ± 0.13s; females: 10.78 ± 0.28s). A significant and strong stroke effect was noted in the start and turn main outcome, in both sexes. In the start plus the turn combined, males and females were faster in Freestyle (males: 15.40 ± 0.20s; females: 17.45 ± 0.54s). The start and the turn combined accounted almost one-third of the total race time in all events, and non-significant differences (p > 0.05) were noted across the four swim strokes. Once this research made evident the high relevance of start and turns, it is suggested that coaches and swimmers should dedicate an expressive portion of the training perfecting these actions.

  13. Pigeons produce aerodynamic torques through changes in wing trajectory during low speed aerial turns.

    Science.gov (United States)

    Ros, Ivo G; Badger, Marc A; Pierson, Alyssa N; Bassman, Lori C; Biewener, Andrew A

    2015-02-01

    The complexity of low speed maneuvering flight is apparent from the combination of two critical aspects of this behavior: high power and precise control. To understand how such control is achieved, we examined the underlying kinematics and resulting aerodynamic mechanisms of low speed turning flight in the pigeon (Columba livia). Three birds were trained to perform 90 deg level turns in a stereotypical fashion and detailed three-dimensional (3D) kinematics were recorded at high speeds. Applying the angular momentum principle, we used mechanical modeling based on time-varying 3D inertia properties of individual sections of the pigeon's body to separate angular accelerations of the torso based on aerodynamics from those based on inertial effects. Directly measured angular accelerations of the torso were predicted by aerodynamic torques, justifying inferences of aerodynamic torque generation based on inside wing versus outside wing kinematics. Surprisingly, contralateral asymmetries in wing speed did not appear to underlie the 90 deg aerial turns, nor did contralateral differences in wing area, angle of attack, wingbeat amplitude or timing. Instead, torso angular accelerations into the turn were associated with the outside wing sweeping more anteriorly compared with a more laterally directed inside wing. In addition to moving through a relatively more retracted path, the inside wing was also more strongly pronated about its long axis compared with the outside wing, offsetting any difference in aerodynamic angle of attack that might arise from the observed asymmetry in wing trajectories. Therefore, to generate roll and pitch torques into the turn, pigeons simply reorient their wing trajectories toward the desired flight direction. As a result, by acting above the center of mass, the net aerodynamic force produced by the wings is directed inward, generating the necessary torques for turning. © 2015. Published by The Company of Biologists Ltd.

  14. Comparison between voltage by turn measured on different tokamaks operating in hybrid wave current drive regime

    International Nuclear Information System (INIS)

    Briffod, G.; Hoang, G.T.

    1987-06-01

    On a tokamak in a current drive operation with a hybrid wave, the R.F. current is estimated from the voltage drop by plasma turn generated by R.F. power application. This estimated current is not proportional to the injected power. There still exists in the plasma an electric field corresponding to the current part produced by induction. The role evaluation of this parameter on the current drive efficiency is important. In this report the relation voltage-R.F. current is studied on Petula and results on the voltage evolution by turn on different machines are compared [fr

  15. Collision free path generation in 3D with turning and pitch radius constraints for aerial vehicles

    DEFF Research Database (Denmark)

    Schøler, F.; La Cour-Harbo, A.; Bisgaard, M.

    2009-01-01

    In this paper we consider the problem of trajectory generation in 3D for uninhabited aerial systems (UAS). The proposed algorithm for trajectory generation allows us to find a feasible collision-free 3D trajectory through a number of waypoints in an environment containing obstacles. Our approach...... assumes that most of the aircraft structural and dynamic limitations can be formulated as a turn radius constraint, and that any two consecutive waypoints have line-of-sight. The generated trajectories are collision free and also satisfy a constraint on the minimum admissible turning radius, while...

  16. Residual Stress Examination In Surface Layers Turned By Auto-Rotary Tool

    Science.gov (United States)

    Struharňanský, Jozef; Stančeková, Dana; Martikáň, Anton; Varga, Daniel; Kuždál, Viktor; Rákoci, Jozef

    2015-12-01

    In this article, unconventional kinematics of turning is examined with the aim on influence of cutting parameters on surface layers residual stress. The auto-rotary cutting tool prototype for turning was developed, designed and constructed at the University of Zilina. The tool is made of high speed steel. Residual stress examination of material 100Cr6 was performed by non-destructive measuring method of X-ray diffraction. This method is able to determine normal and shear stress conditions without damaging the examined sample.

  17. Georg Groddeck's maternal turn: its evolution and influence on early psychoanalysts.

    Science.gov (United States)

    Hristeva, Galina; Poster, Mark F

    2013-09-01

    The paper examines the biographical, cultural and clinical influences on the "maternal turn" of Georg Groddeck, a German physician and correspondent of Sigmund Freud. It demonstrates Groddeck's influence on Sándor Ferenczi, Frieda Fromm-Reichmann and Karen Horney, each of whom influenced generations of psychoanalysts. The authors explore the resonance of Groddeck's work with several concepts of contemporary psychoanalysis and raise the question as to whether the roots of these psychoanalytic concepts were seeded by Groddeck's "maternal turn", passed on by the above psychoanalysts through intergenerational psychoanalytic training and further elaborated by later investigators who were not necessarily familiar with the work of Groddeck.

  18. Vendingen mod billedet. Hvad der gemmer sig bag The Iconic Turn

    DEFF Research Database (Denmark)

    Lassen, Frank Beck

    2009-01-01

    Within the humanities a fairly new reorientation towards imagery is taking place. The article describes the components involved in this ‘Iconic Turn' by introducing to leading german scholars and practitioners (Hans Belting, Horst Bredekamp, Gottfried Boehm) and offers a presentation and illustra......Within the humanities a fairly new reorientation towards imagery is taking place. The article describes the components involved in this ‘Iconic Turn' by introducing to leading german scholars and practitioners (Hans Belting, Horst Bredekamp, Gottfried Boehm) and offers a presentation...

  19. Aerodynamics in arbitrarily accelerating frames: application to high-g turns

    CSIR Research Space (South Africa)

    Gledhill, Irvy MA

    2010-09-01

    Full Text Available in arbitrarily accelerating frames: application to high-g turns I.M.A. Gledhill1, J. Nordstr?m2,3,4 1 DPSS, CSIR, PO Box 395, Pretoria 0001 South Africa 2FOI, Swedish Defence Research Agency SE-164 90 Stockholm, Sweden 3Uppsala University, Olofsgatan... of the displacement of vortices in turns, since the disruption of expected loads on fins may have serious consequences for the trajectory. 2. Theory and implementation The transformation of the Navier-Stokes equations between an inertial frame and an arbitrarily...

  20. Aerodynamics in arbitrarily accelerating frames: application to high-g turns

    CSIR Research Space (South Africa)

    Gledhill, Irvy MA

    2010-09-01

    Full Text Available Accelerating Frames: Application to High-g Turns I.M.A. Gledhill1, J. Nordström2,3,4 1 DPSS, CSIR, PO Box 395, Pretoria 0001 South Africa 2FOI, Swedish Defence Research Agency SE-164 90 Stockholm, Sweden 3Uppsala University, Olofsgatan 9, 753 11... of vortices in turns, since the disruption of expected loads on fins may have serious consequences for the trajectory. 2. Theory and implementation The transformation of the Navier-Stokes equations between an inertial frame and an arbitrarily...

  1. Measuring of roundness after turning of composite material with natural fibers

    Directory of Open Access Journals (Sweden)

    D. Mital

    2016-12-01

    Full Text Available The article is based on practical requirements from the reason of unequally removed material during the turning of the wood plastic composite (WPC. This results in geometrical deviations of the WPC bar diameter. WPC represents a relatively new group of materials that has been at the market for almost 30 years. In 1983 Lear Corporation in Wisconsine, USA made for the first time the interior panels of cars from composite materials – PP matrix with organic filler – 50 % wood flour. WPCs displace traditional materials such as wood, steel and cement materials in the marina industry. Designers are not limited technology of production from construction aspect, because different shapes and profiles can be produced by injection (resp. process of extrusion, but in the process of machining were monitored problems with tolerances. Mixed colors can be achieved by using of different pigments and one feels that this is real wood. Technologists begin to use convention technologies – drilling, milling and turning, as tendency of application of WPC increased. Knowledges about machining of WPC are not elaborate as deep as machining of metals or plastics. And this is a reason for orientation in this direction too. Commercial wood plastic composite MEGAWOOD (70 % wood flour, 30 % HDPE was a sample material in current investigation of roundness after turning of WPC. HSS EN ISO HS6-5-2 cutting tool was used. The geometry of the cutting tool was γ0 = 20°, α0 = 8°, κr = 45°, rε = 0,5 mm, εr = 90°. Cutting conditions during turning were as follows: cutting speed n = 900 m/min (constant, feed f = 0,1 to 0,61 mm, depth of cut ap = 0,5 mm for turning of final diameter d = 36 mm. It was dry turning. Roundness/cylindricity measuring system RA – 120 was used for measuring of roundness deviation. It was found that the roundness deviation increases with feed increasing. Popped heat was not used during the turning to final diameter – 36 mm. Using of popped heat

  2. The machinability of nickel-based alloys in high-pressure jet assisted (HPJA turning

    Directory of Open Access Journals (Sweden)

    D. Kramar

    2013-10-01

    Full Text Available Due to their mechanical, thermal and chemical properties, nickel-based alloys are generally included among materials that are hard to machine. An experimental study has been performed to investigate the capabilities of conventional and high-pressure jet assisted (HPJA turning of hard-to-machine materials, namely Inconel 718. The capabilities of different hard turning procedures are compared by means of chip breakability. The obtained results show that HPJA method offers a significant increase in chip breakability, under the same cutting conditions (cutting speed, feed rate, depth of cut.

  3. Effect of Type of Cutting Tips on Cutting Forces in Turning

    Directory of Open Access Journals (Sweden)

    Polák Pavel

    2014-10-01

    Full Text Available The aim of this article is to demonstrate the efect of cutting materials and geometry of cutting tips on cutting forces in turning as well as the quality and precision of machined surface. The experiment focuses on measuring cutting forces when turning a sample of steel 11 523 at a constant feed rate and cut depth and at varying speeds of a spindle. Measurements were made using exchangeable cutting tips of diferent types. The results will be evaluated in terms of the impact of diferent characteristics of cutting tips and variable spindle speeds.

  4. The Economic Consequences of Divorce in Germany: What Has Changed since the Turn of the Millennium?

    Directory of Open Access Journals (Sweden)

    Miriam Bröckel

    2015-10-01

    Overall, the analyses show that the economic consequences of divorce are still more negative for women than for men after the turn of the millennium, although female labour participation has increased and the public child care system was expanded. Nevertheless, some signs of change become visible indicating that the gains and losses of marital disruption are not unilaterally distributed among the genders. That men may also depend on incomes of their spouses can be seen for the increasing number of dual earner households. Moreover, after the turn of the millennium, economic dependence on public transfers increased not only for women but also for men.

  5. Turn on” fluorescence enhancement of Zn octacarboxyphthaloyanine-graphene oxide conjugates by hydrogen peroxide

    International Nuclear Information System (INIS)

    Shumba, Munyaradzi; Mashazi, Philani; Nyokong, Tebello

    2016-01-01

    Zn octacarboxy phthalocyanine-reduced graphene oxide or graphene oxide conjugates were characterized by absorption spectroscopy, transmission electron microscopy, fluorescence spectroscopy, X-ray diffraction, thermo gravimetric analysis and X-ray photon spectroscopy. The presence of reduced graphene oxide or graphene oxide resulted in the quenching (turn on) of Zn octacarboxy phthalocyanine fluorescence which can be explained by photoinduced electron transfer. Zn octacarboxy phthalocyanine-reduced graphene oxide or graphene oxide conjugates “turned on” fluorescence showed a linear response to hydrogen peroxide hence their potential to be used as sensors. The nanoprobe developed showed high selectivity towards hydrogen peroxide in the presence of physiological interferences.

  6. Exploring interaction between a non-speaking boy using aided AAC and his everyday communication partners: features of turn organizing and turn design

    DEFF Research Database (Denmark)

    Pilesjö, Maja Sigurd; Rasmussen, Gitte

    2011-01-01

    This study investigates the practice of achieving common understanding in aided Augmentative and Alternative Communication (AAC). The aims are to explore whether communicative contributions can be described as turns, as defined in conversation analytic terms, and how then the contributions...... to the interaction can be designed. The principles and practices of Conversation Analysis (CA) were used to record, transcribe and analyse conversations between a non-speaking boy with cerebral palsy with, on different occasions, his mother, his assistant and his friend. The boy augments his communication with aided...

  7. Superconductivity in single wall carbon nanotubes

    Directory of Open Access Journals (Sweden)

    H Yavari

    2009-08-01

    Full Text Available   By using Greens function method we first show that the effective interaction between two electrons mediated by plasmon exchange can become attractive which in turn can lead to superconductivity at a high critical temperature in a singl wall carbon nanotubes (SWCNT. The superconducting transition temperature Tc for the SWCNT (3,3 obtained by this mechanism agrees with the recent experimental result. We also show as the radius of SWCNT increases, plasmon frequency becomes lower and leads to lower Tc.

  8. Improving the precision of linear optics measurements based on turn-by-turn beam position monitor data after a pulsed excitation in lepton storage rings

    Directory of Open Access Journals (Sweden)

    L. Malina

    2017-08-01

    Full Text Available Beam optics control is of critical importance for machine performance and protection. Nowadays, turn-by-turn (TbT beam position monitor (BPM data are increasingly exploited as they allow for fast and simultaneous measurement of various optics quantities. Nevertheless, so far the best documented uncertainty of measured β-functions is of about 10‰ rms. In this paper we compare the β-functions of the ESRF storage ring measured from two different TbT techniques—the N-BPM and the Amplitude methods—with the ones inferred from a measurement of the orbit response matrix (ORM. We show how to improve the precision of TbT techniques by refining the Fourier transform of TbT data with properly chosen excitation amplitude. The precision of the N-BPM method is further improved by refining the phase advance measurement. This represents a step forward compared to standard TbT measurements. First experimental results showing the precision of β-functions pushed down to 4‰ both in TbT and ORM techniques are reported and commented.

  9. Improving the precision of linear optics measurements based on turn-by-turn beam position monitor data after a pulsed excitation in lepton storage rings

    Science.gov (United States)

    Malina, L.; Coello de Portugal, J.; Persson, T.; Skowroński, P. K.; Tomás, R.; Franchi, A.; Liuzzo, S.

    2017-08-01

    Beam optics control is of critical importance for machine performance and protection. Nowadays, turn-by-turn (TbT) beam position monitor (BPM) data are increasingly exploited as they allow for fast and simultaneous measurement of various optics quantities. Nevertheless, so far the best documented uncertainty of measured β -functions is of about 10‰ rms. In this paper we compare the β -functions of the ESRF storage ring measured from two different TbT techniques—the N-BPM and the Amplitude methods—with the ones inferred from a measurement of the orbit response matrix (ORM). We show how to improve the precision of TbT techniques by refining the Fourier transform of TbT data with properly chosen excitation amplitude. The precision of the N-BPM method is further improved by refining the phase advance measurement. This represents a step forward compared to standard TbT measurements. First experimental results showing the precision of β -functions pushed down to 4‰ both in TbT and ORM techniques are reported and commented.

  10. Redesigning the type II' β-turn in green fluorescent protein to type I': implications for folding kinetics and stability.

    Science.gov (United States)

    Madan, Bharat; Sokalingam, Sriram; Raghunathan, Govindan; Lee, Sun-Gu

    2014-10-01

    Both Type I' and Type II' β-turns have the same sense of the β-turn twist that is compatible with the β-sheet twist. They occur predominantly in two residue β-hairpins, but the occurrence of Type I' β-turns is two times higher than Type II' β-turns. This suggests that Type I' β-turns may be more stable than Type II' β-turns, and Type I' β-turn sequence and structure can be more favorable for protein folding than Type II' β-turns. Here, we redesigned the native Type II' β-turn in GFP to Type I' β-turn, and investigated its effect on protein folding and stability. The Type I' β-turns were designed based on the statistical analysis of residues in natural Type I' β-turns. The substitution of the native "GD" sequence of i+1 and i+2 residues with Type I' preferred "(N/D)G" sequence motif increased the folding rate by 50% and slightly improved the thermodynamic stability. Despite the enhancement of in vitro refolding kinetics and stability of the redesigned mutants, they showed poor soluble expression level compared to wild type. To overcome this problem, i and i + 3 residues of the designed Type I' β-turn were further engineered. The mutation of Thr to Lys at i + 3 could restore the in vivo soluble expression of the Type I' mutant. This study indicates that Type II' β-turns in natural β-hairpins can be further optimized by converting the sequence to Type I'. © 2014 Wiley Periodicals, Inc.

  11. A Concise Protocol for the Validation of Language ENvironment Analysis (LENA) Conversational Turn Counts in Vietnamese

    Science.gov (United States)

    Ganek, Hillary V.; Eriks-Brophy, Alice

    2018-01-01

    The aim of this study was to present a protocol for the validation of the Language ENvironment Analysis (LENA) System's conversational turn count (CTC) for Vietnamese speakers. Ten families of children aged between 22 and 42 months, recruited near Ho Chi Minh City, participated in this project. Each child wore the LENA audio recorder for a full…

  12. Investigation of the process rotary turning by multi-faceted cutters

    Science.gov (United States)

    Indakov, N. S.; Binchurov, A. S.; Gordeev, Y. I.; Yasinski, V. B.; Kiselyov, D. I.; Lepeshev, A. A.

    2017-10-01

    Effect of geometrical and technological parameters of method rotary turning by multifaceted cutters (RTMC) on the quality of machining was investigated. Using the numerical, analytical and experimental methods the effect of cutting conditions on roughness was determed. The resulting semiempirical dependences allow to appoint the cutting conditions with predict roughness parameters Ra, Rz, R max.

  13. Effective Strategies for Turning Receptive Vocabulary into Productive Vocabulary in EFL Context

    Science.gov (United States)

    Faraj, Avan Kamal Aziz

    2015-01-01

    Vocabulary acquisition has been a main concern of EFL English teachers and learners. There have been tons of research to examine the student's level of receptive vocabulary and productive vocabulary, but no research has conducted on how turning receptive vocabulary into productive vocabulary. This study has reported the impact of the teaching…

  14. Making Sense of the Educational Present: Problematising the "Merit Turn" in the Italian Eduscape

    Science.gov (United States)

    Grimaldi, Emiliano; Barzano, Giovanna

    2014-01-01

    This article problematises the recent "merit turn" in the Italian education system. It addresses the analysis of how the global idea of "merit as lever for modernisation" and its related technologies have flowed into a regional education space through a set of four policy trajectories. It explores how these have partially…

  15. Linguistic Minorities and the Multilingual Turn: Constructing Language Ownership through Affect in Cultural Production

    Science.gov (United States)

    McLaughlin, Mireille

    2016-01-01

    The "multilingual turn" brings questions of language ownership to the forefront of debates about linguistic minority governance. Acadian minority cultural producers construct language ownership using multiple languages and targeting multilingual publics, but use ideologies of monolingualism to situate Acadian authenticity in place and…

  16. Twin-cutter form turning of commutator rings using cutters’ progressive motion piezoelectric engines

    OpenAIRE

    Vozhzhov Andrey; Pashkov Eugene; Golovin Vasiliy; Florya Pavel

    2017-01-01

    The option of realization of the technological scheme of twin-cutter form turning via use of piezoelectric engines of progressive motion is hereby proposed. The cutting force vector constitutes the external perturbation effect. The scheme, design, transfer function of the cutter's piezoelectric engine of progressive motion is hereby presented.

  17. Twin-cutter form turning of commutator rings using cutters’ progressive motion piezoelectric engines

    Directory of Open Access Journals (Sweden)

    Vozhzhov Andrey

    2017-01-01

    Full Text Available The option of realization of the technological scheme of twin-cutter form turning via use of piezoelectric engines of progressive motion is hereby proposed. The cutting force vector constitutes the external perturbation effect. The scheme, design, transfer function of the cutter's piezoelectric engine of progressive motion is hereby presented.

  18. What turns migrants into ethnic minorities at work? : Factors Erecting Ethnic Boundaries among Dutch Police Officers

    NARCIS (Netherlands)

    Siebers, Hans

    Transnational migration flows have revitalised the interest in ethnicity in social sciences. The ethnic boundary approach (Barth, Wimmer) argues for a non-essentialist understanding of ethnicity and calls for detecting the factors that turn migrants into ethnic minorities. Based on ethnographic

  19. Effects of Hypericum perforatum on turning behavior in an animal model of Parkinson's disease

    Directory of Open Access Journals (Sweden)

    Débora Dalla Vecchia

    2015-03-01

    Full Text Available Parkinson's disease (PD is an age-related neurodegenerative disorder characterized by the slow and progressive death of dopaminergic neurons in the (substantia nigra pars compact. Hypericum perforatum (H. perforatum is a plant widely used as an antidepressant, that also presents antioxidant and anti-inflammatory properties. We evaluated the effects of H. perforatum on the turning behavior of rats submitted to a unilateral administration of 6-hydroxydopamine (6-OHDA into the medial forebrain bundle as an animal model of PD. The animals were treated with H. perforatum (100, 200, or 400 mg/kg, v.o. for 35 consecutive days (from the 28th day before surgery to the 7th day after. The turning behavior was evaluated at 7, 14 and 21 days after the surgery, and the turnings were counted as contralateral or ipsilateral to the lesion side. All tested doses significantly reduced the number of contralateral turns in all days of evaluation, suggesting a neuroprotective effect. However, they were not able to prevent the 6-OHDA-induced decrease of tyrosine hydroxylase expression in the lesioned striatum. We propose that H. perforatum may counteract the overexpression of dopamine receptors on the lesioned striatum as a possible mechanism for this effect. The present findings provide new evidence that H. perforatum may represent a promising therapeutic tool for PD.

  20. Turn down the heat: climate extremes, regional impacts, and the case for resilience

    NARCIS (Netherlands)

    Adams, Sophie; Baarsch, Florent; Bondeau, Alberte; Coumou, D.; Donner, Reik; Frieler, Katja; Hare, Bill; Menon, Arathy; Perette, Mahe; Plontek, Franziska; Rehfeld, Kira; Robinson, Alexander; Rocha, Marcia; Rogelj, Joeri; Runge, Jakob; Schaeffer, Michiel; Schewe, Jacob; Schleussner, Carl-Friedrich; Schwan, Susanne; Serdeczny, Olivia; Svirejeva-Hopkins, Anastasia; Vieweg, Marion; Warszawski, Lila

    2013-01-01

    This report focuses on the risks of climate change to development in Sub-Saharan Africa, South East Asia and South Asia. Building on the 2012 report, Turn Down the Heat: Why a 4°C Warmer World Must be Avoided, this new scientific analysis examines the likely impacts of present day, 2°C and 4°C