WorldWideScience

Sample records for hurl touchdown passes

  1. Ocular injury in hurling.

    LENUS (Irish Health Repository)

    Flynn, T H

    2012-02-03

    OBJECTIVES: To describe the clinical characteristics of ocular injuries sustained in hurling in the south of Ireland and to investigate reasons for non-use of protective headgear and eye wear. METHODS: Retrospective review of the case notes of 310 patients who attended Cork University Hospital or Waterford Regional Hospital between 1 January 1994 and 31 December 2002 with ocular injuries sustained during a hurling match. A confidential questionnaire on reasons for non-use of protective headgear and eye wear was completed by 130 players. RESULTS: Hurling related eye injuries occurred most commonly in young men. Fifty two patients (17%) required hospital admission, with hyphaema accounting for 71% of admissions. Ten injuries required intraocular surgical INTERVENTION: retinal detachment repair (5); macular hole surgery (1); repair of partial thickness corneal laceration (1); repair of globe perforation (1); enucleation (1); trabeculectomy for post-traumatic glaucoma (1). Fourteen eyes (4.5%) had a final best corrected visual acuity (BCVA) of <6\\/12 and six (2%) had BCVA <3\\/60. In the survey, 63 players (48.5%) reported wearing no protective facemask while playing hurling. Impairment of vision was the most common reason cited for non-use. CONCLUSIONS: Hurling related injury is a significant, and preventable, cause of ocular morbidity in young men in Ireland. The routine use of appropriate protective headgear and faceguards would result in a dramatic reduction in the incidence and severity of these injuries, and should be mandatory.

  2. Centrifugally decoupling touchdown bearings

    Science.gov (United States)

    Post, Richard F

    2014-06-24

    Centrifugally decoupling mechanical bearing systems provide thin tensioned metallic ribbons contained in a support structure. This assembly rotates around a stationary shaft being centered at low speeds by the action of the metal ribbons. Tension springs are connected on one end to the ribbons and on the other end to the support structure. The ribbons pass through slots in the inner ring of the support structure. The spring preloading thus insures contact (or near-contact) between the ribbons and the shaft at rotation speeds below the transition speed. Above this speed, however, the centrifugal force on the ribbons produces a tensile force on them that exceeds the spring tensile force so that the ribbons curve outward, effectively decoupling them from mechanical contact with the shaft. They still remain, however, in position to act as a touchdown bearing in case of abnormally high transverse accelerations.

  3. Maxillofacial and dental injuries sustained in hurling.

    LENUS (Irish Health Repository)

    Murphy, C

    2010-06-01

    The incidence of facial injuries in hurling has decreased since the introduction of helmets with facial protection. The aim of this study was to identify the incidence of facial and dental injuries sustained in hurling training or matches and compliance with wearing helmets, with or without modified or unmodified faceguards. This prospective study included all patients who attended the Mid Western Regional Hospital Limerick, with injuries sustained while playing hurling during 2007 and 2008 seasons. The study population included 70 patients. Forty two (60%) injuries occurred during practice and 28(40%) during matches. Fifty two players (75%) sustained facial injuries whilst no helmet was worn. Eighteen injuries (25%) were sustained by players wearing helmets. Th study demonstrates that 60% of injuries occur during training when players do not wear helmets. We support the recent introduction by the GAA making it compulsory to wear helmets with faceguard protection from January 1st 2010.

  4. Touchdowns, Quarterback Sacks, and Pass Interceptions.

    Science.gov (United States)

    Bina, Michael J.

    1993-01-01

    This commentary by the president of the Association for Education and Rehabilitation of the Blind and Visually Impaired uses a football analogy to point out the importance of positive reinforcement and encouragement in mutual support of colleagues working in the difficult field of rehabilitation. (DB)

  5. ROSETTA lander Philae: Touch-down reconstruction

    Science.gov (United States)

    Roll, Reinhard; Witte, Lars

    2016-06-01

    The landing of the ROSETTA-mission lander Philae on November 12th 2014 on Comet 67 P/Churyumov-Gerasimenko was planned as a descent with passive landing and anchoring by harpoons at touch-down. Actually the lander was not fixed at touch-down to the ground due to failing harpoons. The lander internal damper was actuated at touch-down for 42.6 mm with a speed of 0.08 m/s while the lander touch-down speed was 1 m/s. The kinetic energy before touch-down was 50 J, 45 J were dissipated by the lander internal damper and by ground penetration at touch-down, and 5 J kinetic energy are left after touch-down (0.325 m/s speed). Most kinetic energy was dissipated by ground penetration (41 J) while only 4 J are dissipated by the lander internal damper. Based on these data, a value for a constant compressive soil-strength of between 1.55 kPa and 1.8 kPa is calculated. This paper focuses on the reconstruction of the touch-down at Agilkia over a period of around 20 s from first ground contact to lift-off again. After rebound Philae left a strange pattern on ground documented by the OSIRIS Narrow Angle Camera (NAC). The analysis shows, that the touch-down was not just a simple damped reflection on the surface. Instead the lander had repeated contacts with the surface over a period of about 20 s±10 s. This paper discusses scenarios for the reconstruction of the landing sequence based on the data available and on computer simulations. Simulations are performed with a dedicated mechanical multi-body model of the lander, which was validated previously in numerous ground tests. The SIMPACK simulation software was used, including the option to set forces at the feet to the ground. The outgoing velocity vector is mostly influenced by the timing of the ground contact of the different feet. It turns out that ground friction during damping has strong impact on the lander outgoing velocity, on its rotation, and on its nutation. After the end of damping, the attitude of the lander can be

  6. An investigation into the variation that exists between the physical performance indicators of hurling players at different levels of participation

    OpenAIRE

    Murphy, Andrew

    2012-01-01

    peer-reviewed Background: There is a paucity of research profiling the anthropometric measures and physical performance indicators of hurling athletes. Such profiles are essential to optimising the physical preparation structures of hurling athletes. Methods: A battery of tests profiling the anthropometric measures and physical performance indicators of 95 hurling athletes from three different levels of participation, senior elite (n1=34), senior sub- elite (n2=28) & junior elite (n3=33...

  7. Similarity and singularity in adhesive elastohydrodynamic touchdown

    CERN Document Server

    Carlson, Andreas

    2015-01-01

    We consider the touchdown of an elastic sheet as it adheres to a wall, which has a dynamics that is limited by the viscous resistance provided by the squeeze flow of the intervening liquid trapped between the two solid surfaces. The dynamics of the sheet is described mathematically by elastohydrodynamic lubrication theory, coupling the elastic deformation of the sheet, the microscopic van der Waals adhesion and the viscous thin film flow. We use a combination of numerical simulations of the governing partial differential equation and a scaling analysis to describe the self-similar solution of the touchdown of the sheet as it approaches the wall. An analysis of the equation satisfied by the similarity variables in the vicinity of the touchdown event shows that an entire sequence of solutions are allowed. However, a comparison of these shows that only the fundamental similarity solution is observed in the time-dependent numerical simulations, consistent with the fact that it alone is stable. Our analysis genera...

  8. Do helmets worn for hurling fail to protect the ear? Identification of an emerging injury pattern.

    LENUS (Irish Health Repository)

    Martin-Smith, James D

    2012-12-01

    Hurling is an Irish national game of stick and ball known for its ferocity, played by 190 000 players. Facial injuries were common but have been significantly reduced by legislation enforcing compulsory helmet wearing. Current standard helmets worn by hurlers do not offer protection to the external ear. Here we describe an emerging pattern of ear injuries and demonstrate the risk of external ear injuries in hurlers complying with current helmet safety standards. A 6-month retrospective analysis was carried out of patients attending Cork University Hospital (CUH) with ear lacerations sustained while hurling. Patient notes were reviewed and helmet manufacturers were interviewed. Seven patients were identified, all of whom sustained complex through ear lacerations while wearing helmets complying with current safety standards. Current helmet design fails to protect the external ear placing it at an increased risk of injury, a potential solution is to include ear protection in the helmet design.

  9. United States Tornado Touchdown Points 1950-2004 - Direct Download

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This map layer shows tornado touchdown points in the United States, Puerto Rico, and the U.S. Virgin Islands, from 1950 to 2004. Statistical data were obtained from...

  10. Modelling and simulation of the coefficient of restitution of the sliotar in hurling.

    Science.gov (United States)

    Alsakarneh, Amjad; Quinn, Brian; Kelly, Ger; Barrett, John

    2012-09-01

    The coefficient of restitution (COR) is one of the most important standards in all bat-and-ball sports to study the ball suitability and bouncing characteristics. Currently, a demand exists for an improved analytical model for computing the COR, particularly when a new material is introduced. A viscoelastic ball known as a sliotar is taken from the Irish bat-and-ball sport of hurling and used in this paper as a case study. For the theoretical approach, a modified Maxwell's viscoelastic model was used to derive an analytical formula to predict the COR. The developed formula confirms that the damping ratio and the dependency of the COR on the impact speed are the most dominant factors. A 3-dimensional finite element (FE) model was developed to simulate the sliotar impact test to estimate the COR, and to provide a simple tool for further studies on the sliotar. A high-speed camera was used to film the impact event to validate the models' behavior. The close correlation of 9% and 5% between the experimental and the developed analytical and FE models, respectively, indicates that the developed models can successfully identify the COR of the ball in the game of hurling and similar bat-and-ball sports.

  11. The Integration of Internal and External Training Load Metrics in Hurling.

    Science.gov (United States)

    Malone, Shane; Doran, Dominic; Akubat, Ibrahim; Collins, Kieran

    2016-12-01

    The current study aimed to assess the relationship between the hurling player's fitness profile and integrated training load (TL) metrics. Twenty-five hurling players performed treadmill testing for VO2max, the speed at blood lactate concentrations of 2 mmol•L-1 (vLT) and 4 mmol•L-1 (vOBLA) and the heart rate-blood lactate profile for calculation of individual training impulse (iTRIMP). The total distance (TD; m), high speed distance (HSD; m) and sprint distance (SD; m) covered were measured using GPS technology (4-Hz, VX Sport, Lower Hutt, New Zealand) which allowed for the measurement of the external TL. The external TL was divided by the internal TL to form integration ratios. Pearson correlation analyses allowed for the assessment of the relationships between fitness measures and the ratios to performance during simulated match play. External measures of the TL alone showed limited correlations with fitness measures. Integrated TL ratios showed significant relationships with fitness measures in players. TD:iTRIMP was correlated with aerobic fitness measures VO2max (r = 0.524; p = 0.006; 95% CI: 0.224 to 0.754; large) and vOBLA (r = 0.559; p = 0.003; 95% CI: 0.254 to 0.854; large). HSD:iTRIMP also correlated with aerobic markers for fitness vLT (r = 0.502; p = 0.009; 95% CI: 0.204 to 0.801; large); vOBLA (r = 0.407; p = 0.039; 95% CI: 0.024 to 0.644; moderate). Interestingly SD:iTRIMP also showed significant correlations with vLT (r = 0.611; p = 0.001; 95% CI: 0.324 to 0.754; large). The current study showed that TL ratios can provide practitioners with a measure of fitness as external performance alone showed limited relationships with aerobic fitness measures.

  12. The Integration of Internal and External Training Load Metrics in Hurling

    Directory of Open Access Journals (Sweden)

    Malone Shane

    2016-12-01

    Full Text Available The current study aimed to assess the relationship between the hurling player’s fitness profile and integrated training load (TL metrics. Twenty-five hurling players performed treadmill testing for VO2max, the speed at blood lactate concentrations of 2 mmol•L-1 (vLT and 4 mmol•L-1 (vOBLA and the heart rate-blood lactate profile for calculation of individual training impulse (iTRIMP. The total distance (TD; m, high speed distance (HSD; m and sprint distance (SD; m covered were measured using GPS technology (4-Hz, VX Sport, Lower Hutt, New Zealand which allowed for the measurement of the external TL. The external TL was divided by the internal TL to form integration ratios. Pearson correlation analyses allowed for the assessment of the relationships between fitness measures and the ratios to performance during simulated match play. External measures of the TL alone showed limited correlations with fitness measures. Integrated TL ratios showed significant relationships with fitness measures in players. TD:iTRIMP was correlated with aerobic fitness measures VO2max (r = 0.524; p = 0.006; 95% CI: 0.224 to 0.754; large and vOBLA (r = 0.559; p = 0.003; 95% CI: 0.254 to 0.854; large. HSD:iTRIMP also correlated with aerobic markers for fitness vLT (r = 0.502; p = 0.009; 95% CI: 0.204 to 0.801; large; vOBLA (r = 0.407; p = 0.039; 95% CI: 0.024 to 0.644; moderate. Interestingly SD:iTRIMP also showed significant correlations with vLT (r = 0.611; p = 0.001; 95% CI: 0.324 to 0.754; large. The current study showed that TL ratios can provide practitioners with a measure of fitness as external performance alone showed limited relationships with aerobic fitness measures.

  13. Touchdown Ball-Bearing System for Magnetic Bearings

    Science.gov (United States)

    Kingsbury, Edward P.; Price, Robert; Gelotte, Erik; Singer, Herbert B.

    2003-01-01

    The torque-limited touchdown bearing system (TLTBS) is a backup mechanical-bearing system for a high-speed rotary machine in which the rotor shaft is supported by magnetic bearings in steady-state normal operation. The TLTBS provides ball-bearing support to augment or supplant the magnetic bearings during startup, shutdown, or failure of the magnetic bearings. The TLTBS also provides support in the presence of conditions (in particular, rotational acceleration) that make it difficult or impossible to control the magnetic bearings or in which the magnetic bearings are not strong enough (e.g., when the side load against the rotor exceeds the available lateral magnetic force).

  14. Long Cable Deployments During Martian Touchdown: Lessons Learned

    Science.gov (United States)

    Shafer, Michael W.; Sell, Steven W.

    2009-01-01

    The launch of NASA/JPL's next generation Mars rover is planned for the fall of 2011. The landing scheme chosen for this rover represents a step forward in unmanned payload delivery. The rover will be lowered from a rocket powered descent stage and then placed onto the surface while hanging from three bridles. During this touchdown event, the communication between the rover and descent stage is maintained by an electrical umbilical cable which is deployed in parallel with the structural bridles. During the development of the deployment device for the electrical umbilical, many obstacles were identified and overcome. Many of these challenges were due in large part to the helical nature of the packing geometry of the umbilical cable. And although none of these issues resulted in the failure of the design, they increased both development and assembly time. Many of the issues and some of the benefits of a helical deployment were not immediately apparent during the trade studies carried out during the deployment selection process. Tests were conducted upon completion of the device in order to characterize both the deployment and separation characteristics of the cable. Extraction loads were needed for inputs to touchdown models and separation dynamics were required to assess cable-rover recontact risk. Understanding the pros and cons surrounding the deployment of a helically packed cable would most certainly influence the outcome of future trade studies surrounding the selection of cable deployment options.

  15. Recording the PHILAE Touchdown using CASSE: Laboratory Experiments

    Science.gov (United States)

    Knapmeyer, Martin; Faber, Claudia; Tune, Jean-Baptiste; Arnold, Walter; Witte, Lars; Schröder, Silvio; Roll, Reinhard; Chares, Bernd; Fischer, Hans-Herbert; Möhlmann, Diedrich; Seidensticker, Klaus

    2014-05-01

    The landing of Philae on comet 67P/Churyumov-Gerasimenko is scheduled for November 11, 2014. Its landing feet house the triaxial acceleration sensors of CASSE (Comet Acoustic Surface Sounding Experiment) which will thus be the first sensors to be in mechanical contact with the cometary surface. It is planned that CASSE will be in listening mode to record the deceleration of the lander by the collision with the comet. The analysis of this data will not only support an engineering analysis of the landing process itself but also yield information about the mechanical properties of the comet's surface. Here, we describe a series of controlled landings of a lander model. The tests were conducted in the Landing & Mobility Test Facility (LAMA) of the DLR Institute of Space Systems in Bremen, Germany, where an industrial robot can be programmed to move landers or rovers along predefined paths and under simulated low gravity. The qualification model of the Philae landing gear was used in the tests. It consists of three legs manufactured of carbon fiber and metal joints. Attached to each leg is a foot with two soles and a mechanically driven ice screw to secure the lander on the comet. The right one of these soles, if viewed from the outside towards the lander body, houses a Brüel & Kjaer DeltaTron 4506 triaxial piezoelectric accelerometer as used on the spacecraft. Orientation of the three axes was such that the X-axis of the accelerometer points downwards while the Y and Z axes are horizontal. This somewhat uncommon orientation was necessary due to the position of the electric connector on the 4506. Data was recorded at a sampling rate of 8.2 kHz for a duration of 2 s. Touchdown measurements were conducted on three types of ground with different landing velocities. Landings with low velocities were carried out on the concrete floor of the LAMA to determine the stiffness of the landing gear based on the deceleration data measured with the accelerometer. Landings on fine

  16. Visual factors affecting pilots' judgments of the distance to the touchdown point during emergency landings

    Science.gov (United States)

    Mayer, Celeste Marie

    The purpose of this research was to determine whether identifiable visual factors contribute to misperceptions which may occur when a pilot judges the distance to a selected touchdown point during an emergency landing. The importance of two particular visual experiences, which most pilots do not encounter during routine flight operations, was evaluated: (1) the view of the world seen from the unusually steep bank angle in which the pilot may place the airplane while maneuvering at a low altitude, and (2) the added visual distraction of a "windmilling" propeller. The influence of environmental structure was also considered. Studies of these factors were conducted using a visually realistic cockpit mounted within a VisionDomeRTM virtual-reality environment. Behavioral responses were collected from both naive participants and experienced pilots under conditions which represented emergencies initiated at a variety of altitudes and positions with respect to the landing field. The findings indicated that judgments of the distance to the touchdown point made while the airplane is banked and turning are underestimated, whereas judgments made while the airplane is on an unbanked and straight approach to the touchdown point are overestimated. Additionally, pilot experience was associated with improved judgment accuracy during the banked flights, but decreased accuracy on the unbanked flights. In most cases, the windmilling propeller decreased touchdown point judgment accuracy. Consistent visual misperceptions do occur during simulated emergency landings. Incorporating exposure to these misperceptions into the required flight-training curriculum may decrease the accident rate associated with off-airport emergency landings.

  17. Muley Pass

    OpenAIRE

    Conkey, Ross

    2013-01-01

    Muley Pass tells the story of a town that's not really a town. It was built as a live-on movie set for a western tv show fifty years ago. But, when the show left forty years ago, Slug McLeod didn't. As de facto caretaker, he has to find a way to save the town from imminent destruction in service to High Speed rail - including stepping out of the 1890s into modern day Hollywood.

  18. Documentation of GEMASS entry to touchdown simulation. [space shuttle orbiter capability

    Science.gov (United States)

    Waibel, R. H.

    1977-01-01

    The entry-to-touchdown space shuttle orbiter simulation capability incorporated into the GEMASS subprogram 33 (3-DOF) is documented. A digital autopilot interfaces between GEMASS and the guidance. Vehicle attitude is determined by use of the ability of GEMASS to integrate differential equations in addition to the equations of motion. Vehicle aerodynamic characteristics are obtained from an aerodynamic data tape and control surface deflections required to trim the vehicle, and trimmed aerodynamic coefficients are determined internally. Several indicators to allow evaluation of subsystem performance are included; as is the ability of the user to activate any of several error dispersion sources. The performance of the simulation compares well with more sophisticated simulations.

  19. A method for amplification of unknown flanking sequences based on touchdown PCR and suppression-PCR.

    Science.gov (United States)

    Gao, Song; He, Dan; Li, Guangquan; Zhang, Yanhua; Lv, Huiying; Wang, Li

    2016-09-15

    Thermal asymmetric staggered PCR is the most widely used technique to obtain the flanking sequences. However, it has some limitations, including a low rate of positivity, and complex operation. In this study, a improved method of it was made based on suppression-PCR and touchdown PCR. The PCR fragment obtained by the amplification was used directly for sequencing after gel purification. Using this improved method, the positive rate of amplified flanking sequences of the ATMT mutants reached 99%. In addition, the time from DNA extraction to flanking sequence analysis was shortened to 2 days with about 6 dollars each sample.

  20. Rapid touchdown PCR assay for the molecular diagnosis of spinocerebellar ataxia type 2.

    Science.gov (United States)

    Condorelli, D F; Trovato-Salinaro, A; Spinella, F; Valvo, S; Saponara, R; Giuffrida, S

    1998-01-01

    Seven different chromosomal loci, designated SCA1 to SCA7 (spinocerebellar ataxias), have been identified as responsible for autosomal dominant cerebellar ataxias. Five genes (SCA1, 2, 3, 6, 7) have been cloned to date and show a single type of mutation, an unstable expansion of a CAG repeat coding for a polyglutamine stretch in the corresponding protein. We describe an improved polymerase chain reaction assay, based on a touchdown protocol, for the diagnosis of spinocerebellar ataxia type 2. This method produces an efficient amplification of both normal and pathological alleles and no radioactive labelling is necessary to observe the amplification products. The pathological alleles are identified by a simple non-denaturing polyacrylamide electrophoretic separation followed by ethidium bromide staining. A comparison of this technique with previously reported methods confirmed its utility for the rapid molecular diagnosis of spinocerebellar ataxia type 2. We found that the spinocerebellar ataxia type 2 mutation is responsible for 88% of the examined autosomal dominant cerebellar ataxia type 1 families in our territory (eastern Sicily). With the rapid touchdown polymerase chain reaction method, the trinucleotide expansion was also observed in 2 ataxic patients without family history of the disease, suggesting the necessity for analysis of spinocerebellar ataxia type 2 expansion even in sporadic patients.

  1. Effect of herbizid and touchdown herbicides on soil fungi and on production of some extracellular enzymes.

    Science.gov (United States)

    El-Said, A H M; Abdel-Hafez, S I I; Saleem, A

    2005-01-01

    Glucophilic and cellulose-decomposing fungi were significantly reduced in soil samples treated with 0.019-0.152 mg a.i./kg soil of the herbicides Herbizid and Touchdown. The decrease was regularly correlated with the doses of the two herbicides and persisted till the end of the experiment (12 weeks). The isolated fungi were found to be able to produce hydrolytic extracellular enzymes in solid media but with variable capabilities. The ability to produce enzymes was adversily affected by the incorporation of herbicides in culture media. Lower doses of herbicides were occasionally promotive to enzyme production and mycelial growth of some fungi. Incorporation of 50 ppm of Herbizid and Touchdown significantly activated amylase production and mycelial dry weight in cultures of Fusarium oxysporum, Mucor hiemalis and Penicillium chrysogenum. There was a significant increase in C1-cellulase produced by F. oxysporum and P. aurantiogriseum when cultures were treated with 50, 100 and 200 ppm of Herbizid which induced also more Cx-cellulase production by P. chrysogenum. Lipase and protease production was always lower in treated than in control fungal cultures.

  2. White Kwao Krua variety classification by botanical characteristics and ISSR-Touchdown PCR technique.

    Science.gov (United States)

    Bunmanop, S; Sakuanrungsirikul, S; Manakasem, Y

    2011-07-01

    White Kwao Krua [Pueraria candollei Grah. var. mirifica (Airy Shaw et Suvatabandhu) Niyomdham] is a herb used as an ingredient in supplementary and cosmetic. The tuberous roots of White Kwao Krua (WKK) contain estrogen-like substances. Seeds of WKK, collected from Prachuab Khiri Khan, were planted and propagated in the farm of Suranaree University of Technology, and their genetic backgrounds were ambiguous. Thirty six plants of WKK in the same age were sampled for classification using 7 botanical characteristics and DNA fingerprint by ISSR-Touchdown PCR technique. The relationship of the 7 botanical characteristics, using principle component analysis (PCA), showed the WKK plants fell into 3 groups. In the first group was plant number 34, which was distinguished from the other plants by its small leaf size. The second group consisted of 23 plants with elliptic leaf shape, acute leaf base, and acuminate leaf apex. The third group consisted of 12 plants with ovate leaf shape, obtuse leaf base, and cuspidate leaf apex. The ISSR-Touchdown PCR technique with 41 primers detected 355 loci of DNA with an average of 8.6 loci per primer. The sizes of DNA ranged between 280 bp to 1550 bp. Two hundred ninety three loci exhibited polymorphisms (82.54%) and the rest 62 loci were monomorphic (17.46%). The polymorphism information content (PIC) was between 0.0315-0.9779 (average 0.4779) and number of effective alleles per locus (Ne) ranged between 1.1250-1.8541 (average 1.5544). Unweighted pair group method with arithmetic mean (UPGMA), Jaccard similarity coefficient and PCA were used to find the construction of genetic relationship of WKK. The genetic similarity (GS) of WKK ranged between 0.50-0.86 (average 0.77). At the GS of 0.56 from cluster analysis, the WKK varieties could be divided into 2 major groups. The first group comprised of plant number 34 and 7, and the second group could be further divided in 2 subgroups at GS of 0.69. None of the WKK plants was identical in

  3. Domenico Troili (1766): "The true cause of the fall of a stone in Albereto is a subterranean explosion that hurled the stone skyward"

    Science.gov (United States)

    Marvin, Ursula B.; Cosmo, Mario L.

    2002-12-01

    In mid-July, 1766, a stone fell at Villa Albareto near Modena in northern Italy. A sudden explosion like a cannon shot followed by fierce whistling sounds frightened people over a wide area. Some saw a fiery body falling from the sky; others said it was dark and smoky. The ground shook when the stone plunged into the soil making a hole nearly a meter deep. The Abbé Domenico Troili collected eyewitness reports, examined the stone, and reported the presence of marchesita, an old name for pyrite. A century later, this mineral, which proved to be iron sulfide (FeS), was named "troilite" in his honor. Troili's description is unquestionably that of a meteorite fall, and therefore some scientists have argued that it is Troili, rather than Ernst F. F. Chladni, to whom we should give credit as the first person to record the fall of a stone from space. However, Troili, himself, had no such an idea; he wrote that a subterranean explosion had hurled the stone high into the sky from a vent in the Earth. He stoutly defended this explanation against his opponents, including the Bishop of Modena, who believed that the stone had been hurled aloft by a bolt of lightning. Both hypotheses reflect a conviction, held well into the nineteenth century, that any rocky objects that fall from the sky must originate on the Earth or in the atmosphere. In 1794, Chladni calculated that meteors and meteoritic fireballs course down the sky at such extremely high velocities that the bodies forming them must originate in space. He listed all the falls that he found credible in historic records. Partly through his efforts, meteorites had gained widespread acceptance by 1803, but the idea of their origin in space had not. For the next half century many scientists continued to argue that meteorites either consolidate in the upper atmosphere or are ejected by volcanoes on the Moon. Recent efforts to transfer honors from Chladni to Troili for being the first to describe meteorites as bodies falling from

  4. Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation.

    Science.gov (United States)

    Bezodis, Neil Edward; Trewartha, Grant; Salo, Aki Ilkka Tapio

    2015-06-01

    This study determined the effects of simulated technique manipulations on early acceleration performance. A planar seven-segment angle-driven model was developed and quantitatively evaluated based on the agreement of its output to empirical data from an international-level male sprinter (100 m personal best = 10.28 s). The model was then applied to independently assess the effects of manipulating touchdown distance (horizontal distance between the foot and centre of mass) and range of ankle joint dorsiflexion during early stance on horizontal external power production during stance. The model matched the empirical data with a mean difference of 5.2%. When the foot was placed progressively further forward at touchdown, horizontal power production continually reduced. When the foot was placed further back, power production initially increased (a peak increase of 0.7% occurred at 0.02 m further back) but decreased as the foot continued to touchdown further back. When the range of dorsiflexion during early stance was reduced, exponential increases in performance were observed. Increasing negative touchdown distance directs the ground reaction force more horizontally; however, a limit to the associated performance benefit exists. Reducing dorsiflexion, which required achievable increases in the peak ankle plantar flexor moment, appears potentially beneficial for improving early acceleration performance.

  5. Touchdown General Primer (GP5+/GP6+ PCR and optimized sample DNA concentration support the sensitive detection of human papillomavirus

    Directory of Open Access Journals (Sweden)

    Simmons-Arnold Linda

    2005-11-01

    Full Text Available Abstract Background The GP5+/GP6+ PCR assay is a well-established HPV detection technique. This study has examined the effects of incorporating 'hot start' and 'touchdown' steps into the protocol. In addition, dTTP was substituted with dUTP to permit contamination control measures against carry-over PCR product. Methods Firstly, HPV-16 was amplified from SiHa cell DNA (0.1 ng–100 ng diluted in a background of C-33A DNA (100 ng-2 μg. Secondly, the detection of small quantities (15ag-1.5pg of HPV recombinant plasmids (types 16, 31, 33, 45, 51, 52, and 56 diluted in C-33A DNA was investigated. Thirdly, clinical sample DNA extracts (cervical smears, formalin-fixed vaginal lesions and breast tumors were tested for HPV. Six different PCR protocols were assessed. HPV was detected by gel electrophoresis, and by Southern and dot blot hybridization. Results HPV detection sensitivity was dependent on the total amount of DNA in a PCR. Touchdown protocols supported HPV-16 detection from 1 ng or 0.5 ng SiHa cell DNA in a background of 2 μg or 1 μg C-33A DNA respectively, and from 0.1 ng of SiHa cell DNA (~28 copies HPV-16 in 500 ng or 100 ng background DNA. Under standard GP5+/GP6+ annealing conditions, HPV-16 went undetected when the DNA content of a PCR was 2 μg or 1 μg, and with 500 ng C-33A DNA the sensitivity limit was 1 ng SiHa cell DNA. HPV recombinant plasmids were each detected with high (albeit varying sensitivity by a touchdown protocol. HPV-31 was better amplified under standard annealing conditions (1.5fg in 100 ng background DNA than by a touchdown approach (15fg detection limit. HPV-52 was not amplified by the standard protocol at the dilutions tested. Seventeen different HPV types were demonstrated in 47/65 (72% abnormal cytology samples recorded as HPV negative by standard GP5+/GP6+ conditions. Twenty-one different HPV types were recorded in 111/114 (97% vaginal lesions. Multiple infections were also detectable using a touchdown

  6. Multiplex-Touchdown PCR to Simultaneously Detect Cryptosporidium parvum, Giardia lamblia, and Cyclospora cayetanensis, the Major Causes of Traveler's Diarrhea.

    Science.gov (United States)

    Shin, Ji-Hun; Lee, Sang-Eun; Kim, Tong Soo; Ma, Da-Won; Chai, Jong-Yil; Shin, Eun-Hee

    2016-10-01

    This study aimed to develop a multiplex-touchdown PCR method to simultaneously detect 3 species of protozoan parasites, i.e., Cryptosporidium parvum, Giardia lamblia, and Cyclospora cayetanensis, the major causes of traveler's diarrhea and are resistant to standard antimicrobial treatments. The target genes included the Cryptosporidium oocyst wall protein for C. parvum, Glutamate dehydrogenase for G. lamblia, and 18S ribosomal RNA (18S rRNA) for C. cayetanensis. The sizes of the amplified fragments were 555, 188, and 400 bps, respectively. The multiplex-touchdown PCR protocol using a primer mixture simultaneously detected protozoa in human stools, and the amplified gene was detected in >1×10(3) oocysts for C. parvum, >1×10(4) cysts for G. lamblia, and >1 copy of the 18S rRNA gene for C. cayetanensis. Taken together, our protocol convincingly demonstrated the ability to simultaneously detect C. parvum, G. lamblia, and C. cayetanenesis in stool samples.

  7. TPG bus passes

    CERN Multimedia

    Staff Association

    2013-01-01

    The CERN Staff Association will stop selling TPG bus passes. All active and retired members of the CERN personnel will be able to purchase Unireso bus passes from the CERN Hostel - Building 39 (Meyrin site) from 1st February 2013. For more information: https://cds.cern.ch/journal/CERNBulletin/2013/04/Announcements/1505279?ln=en

  8. Passing and Catching in Rugby.

    Science.gov (United States)

    Namudu, Mike M.

    This booklet contains the fundamentals for rugby at the primary school level. It deals primarily with passing and catching the ball. It contains instructions on (1) holding the ball for passing, (2) passing the ball to the left--standing, (3) passing the ball to the left--running, (4) making a switch pass, (5) the scrum half's normal pass, (6) the…

  9. Passing and Catching in Rugby.

    Science.gov (United States)

    Namudu, Mike M.

    This booklet contains the fundamentals for rugby at the primary school level. It deals primarily with passing and catching the ball. It contains instructions on (1) holding the ball for passing, (2) passing the ball to the left--standing, (3) passing the ball to the left--running, (4) making a switch pass, (5) the scrum half's normal pass, (6) the…

  10. Pass 390 dollari eest

    Index Scriptorium Estoniae

    2003-01-01

    Venekeelne internetilehekülg müüb võltsitud Eesti Vabariigi passe. Kodakondsus- ja migratsiooniameti pressiesindaja Heikki Kirotari ja Piirivalveameti reisidokumentide keskuse ülema kapten Veiko Kulla hinnangud

  11. Cross-Flow VIV-Induced Fatigue Damage of Deepwater Steel Catenary Riser at Touch-Down Point

    Institute of Scientific and Technical Information of China (English)

    王坤鹏; 唐文勇; 薛鸿祥

    2014-01-01

    A prediction model of the deepwater steel catenary riser VIV is proposed based on the forced oscillation test data, taking into account the riser-seafloor interaction for the cross-flow VIV-induced fatigue damage at touch-down point (TDP). The model will give more reasonable simulation of SCR response near TDP than the previous pinned truncation model. In the present model, the hysteretic riser-soil interaction model is simplified as the linear spring and damper to simulate the seafloor, and the damping is obtained according to the dissipative power during one periodic riser-soil interaction. In order to validate the model, the comparison with the field measurement and the results predicted by Shear 7 program of a full-scale steel catenary riser is carried out. The main induced modes, mode frequencies and response amplitude are in a good agreement. Furthermore, the parametric studies are carried out to broaden the understanding of the fatigue damage sensitivity to the upper end in-plane offset and seabed characteristics. In addition, the fatigue stress comparison at TDP between the truncation riser model and the present full riser model shows that the existence of touch-down zones is very important for the fatigue damage assessment of steel catenary riser at TDP.

  12. Novel touchdown-PCR method for the detection of putrescine producing gram-negative bacteria in food products.

    Science.gov (United States)

    Wunderlichová, Leona; Buňková, Leona; Koutný, Marek; Valenta, Tomáš; Buňka, František

    2013-06-01

    Formation of biogenic amines may occur in food due to metabolic activities of contaminating Gram-negative bacteria. Putrescine is assumed to be the major biogenic amine associated with microbial food spoilage. Gram-negative bacteria can form putrescine by three metabolic pathways that can include eight different enzymes. The objective of this study was to design new sets of primers able to detect all important enzymes involved in the production of putrescine by Gram-negative bacteria. Seven new sets of consensual primers based on gene sequences of different bacteria were designed and used for detection of the speA, adiA, adi, speB, aguA, speC, and speF genes. A newly developed touchdown polymerase chain reaction (PCR) method using these primers was successfully applied on several putrescine-producers. Selected PCR products were sequenced and high similarity of their sequences (99-91%) with known sequences of the corresponding genes confirmed high specificity of the developed sets of primers. Furthermore, all the investigated bacteria produced both putrescine and agmatine, an intermediate of putrescine production, which was confirmed by chemical analysis. The developed new touchdown PCR method could easily be used to detect potential foodborne Gram-negative producers of putrescine. The newly developed sets of primers could also be useful in further research on putrescine metabolism in contaminating microbiota.

  13. Cross-flow VIV-induced fatigue damage of deepwater steel catenary riser at touch-down point

    Science.gov (United States)

    Wang, Kun-peng; Tang, Wen-yong; Xue, Hong-xiang

    2014-03-01

    A prediction model of the deepwater steel catenary riser VIV is proposed based on the forced oscillation test data, taking into account the riser-seafloor interaction for the cross-flow VIV-induced fatigue damage at touch-down point (TDP). The model will give more reasonable simulation of SCR response near TDP than the previous pinned truncation model. In the present model, the hysteretic riser-soil interaction model is simplified as the linear spring and damper to simulate the seafloor, and the damping is obtained according to the dissipative power during one periodic riser-soil interaction. In order to validate the model, the comparison with the field measurement and the results predicted by Shear 7 program of a full-scale steel catenary riser is carried out. The main induced modes, mode frequencies and response amplitude are in a good agreement. Furthermore, the parametric studies are carried out to broaden the understanding of the fatigue damage sensitivity to the upper end in-plane offset and seabed characteristics. In addition, the fatigue stress comparison at TDP between the truncation riser model and the present full riser model shows that the existence of touch-down zones is very important for the fatigue damage assessment of steel catenary riser at TDP.

  14. Entropy Message Passing Algorithm

    CERN Document Server

    Ilic, Velimir M; Branimir, Todorovic T

    2009-01-01

    Message passing over factor graph can be considered as generalization of many well known algorithms for efficient marginalization of multivariate function. A specific instance of the algorithm is obtained by choosing an appropriate commutative semiring for the range of the function to be marginalized. Some examples are Viterbi algorithm, obtained on max-product semiring and forward-backward algorithm obtained on sum-product semiring. In this paper, Entropy Message Passing algorithm (EMP) is developed. It operates over entropy semiring, previously introduced in automata theory. It is shown how EMP extends the use of message passing over factor graphs to probabilistic model algorithms such as Expectation Maximization algorithm, gradient methods and computation of model entropy, unifying the work of different authors.

  15. Multi-pass microscopy

    Science.gov (United States)

    Juffmann, Thomas; Klopfer, Brannon B.; Frankort, Timmo L. I.; Haslinger, Philipp; Kasevich, Mark A.

    2016-09-01

    Microscopy of biological specimens often requires low light levels to avoid damage. This yields images impaired by shot noise. An improved measurement accuracy at the Heisenberg limit can be achieved exploiting quantum correlations. If sample damage is the limiting resource, an equivalent limit can be reached by passing photons through a specimen multiple times sequentially. Here we use self-imaging cavities and employ a temporal post-selection scheme to present full-field multi-pass polarization and transmission micrographs with variance reductions of 4.4+/-0.8 dB (11.6+/-0.8 dB in a lossless setup) and 4.8+/-0.8 dB, respectively, compared with the single-pass shot-noise limit. If the accuracy is limited by the number of detected probe particles, our measurements show a variance reduction of 25.9+/-0.9 dB. The contrast enhancement capabilities in imaging and in diffraction studies are demonstrated with nanostructured samples and with embryonic kidney 293T cells. This approach to Heisenberg-limited microscopy does not rely on quantum state engineering.

  16. Passing the baton

    CERN Multimedia

    2011-01-01

    It was not only in South Korea that batons were being passed last week. While the cream of the world’s athletes were competing in the World Athletics Championships, the cream of the world’s accelerator scientists were on their way to San Sebastian in Spain for the International Particle Accelerator Conference.  One of them was carrying a rather special baton for a handover of a different kind.   When Fermilab’s Vladimir Shiltsev handed the high-energy frontier baton to CERN’s Mike Lamont on Tuesday, it marked the end of an era: a time to look back on the phenomenal contribution the Tevatron has made to particle physics over its 25-year operational lifetime, and the great contribution Fermilab has made over that period to global collaboration in particle physics. There’s always a lot of emotion involved in passing the baton. In athletics, it’s the triumph of wining or the heartbreak of losing. But for this special baton, the...

  17. TRT Barrel milestones passed

    CERN Multimedia

    Ogren, H

    2004-01-01

    The barrel TRT detector passed three significant milestones this spring. The Barrel Support Structure (BSS) was completed and moved to the SR-1 building on February 24th. On March 12th the first module passed the quality assurance testing in Building 154 and was transported to the assembly site in the SR-1 building for barrel assembly. Then on April 21st the final production module that had been scanned at Hampton University was shipped to CERN. TRT Barrel Module Production The production of the full complement of barrel modules (96 plus 9 total spares) is now complete. This has been a five-year effort by Duke University, Hampton University, and Indiana University. Actual construction of the modules in the United States was completed in the first part of 2004. The production crews at each of the sites in the United States have now completed their missions. They are shown in the following pictures. Duke University: Production crew with the final completed module. Indiana University: Module producti...

  18. Passing on power & voice

    DEFF Research Database (Denmark)

    Noer, Vibeke Røn; Nielsen, Cathrine Sand

    2014-01-01

    . The education lasts for 3,5 years and the landmark of the educational model is the continuously shifts between teaching in classroom and teaching in clinical practice. Clinical teaching takes place at approved clinical placement institutions in hospitals and in the social and health care services outside...... intention of gaining knowledge about other possible ways to perform the education. The class, named the E-class, followed what in the field was named ‘an experimental educational model based on experienced-based learning’ (Nielsen et al. 2011). The experiential educational model is argued as an experiment.......aspx Higher degree of student involvement in planning as well as teaching was in the field presented as a part of ‘the overall educational approach’. In the course ‘Acute, Critical Nursing & Terminal, Palliative Care’ this was transferred into an innovative pedagogy with intend to pass on power and voice...

  19. Education Bill passes

    Science.gov (United States)

    Richman, Barbara T.

    On March 2 the U.S. House of Representatives passed a bill authorizing $425 million for science and mathematics education in fiscal 1984; the authorization is $350 million more than President Ronald Reagan requested in his budget proposal (Eos, February 15, 1983, p. 65).H.R. 1310 allocates $295 million to the Department of Education not only to improve precollege instruction in science and math, but to beef up foreign language training to aid in improving international communication among scientists. The bill also allots $130 million to the National Science Foundation for a variety of programs, the lion's share of which aims to upgrade research equipment at colleges and universities. It is hoped that industry will match the $100 million targeted for this program.

  20. Detection of GM soybean by multiplex-touchdown PCR-microchip capillary electrophoresis with response surface methodology optimization.

    Science.gov (United States)

    Li, Yongxin; Su, Ning; Zheng, Bo; Ruan, Jia; Li, Yang; Luo, Chunying; Li, Yuanqian

    2015-02-01

    The combination of the molecular technique, the multivariate strategy and microchip capillary electrophoresis (MCE) was applied to rapid and sensitive analysis of genetically modified (GM) soybean in food samples. A multiplex-touchdown polymerase chain reaction (PCR) system was developed for simultaneously amplifying three target sequences in Roundup Ready soybean (RRS). Response surface methodology was introduced to determine the optimal separation condition in MCE with good resolution and short analytical time. The detection of the PCR products of RRS was completed within 4 min under the optimal conditions. The specificity of the method was evaluated by testing non-GM soybean materials and three GM maize varieties (MON810, Bt176 and Bt11). A sensitivity of 0.1% GM organisms content was obtained, which was remarkably lower than the labeling threshold for transgenic food defined as 0.9% in the European regulation. The relative standard deviation of migration time was in the range of 0.17-0.95%. The proposed method was rapid, sensitive and specific and can be used to identify and detect GM soybean in food samples.

  1. Multiplex-Touchdown PCR to Simultaneously Detect Cryptosporidium parvum, Giardia lamblia, and Cyclospora cayetanensis, the Major Causes of Traveler’s Diarrhea

    Science.gov (United States)

    Shin, Ji-Hun; Lee, Sang-Eun; Kim, Tong Soo; Ma, Da-Won; Chai, Jong-Yil; Shin, Eun-Hee

    2016-01-01

    This study aimed to develop a multiplex-touchdown PCR method to simultaneously detect 3 species of protozoan parasites, i.e., Cryptosporidium parvum, Giardia lamblia, and Cyclospora cayetanensis, the major causes of traveler’s diarrhea and are resistant to standard antimicrobial treatments. The target genes included the Cryptosporidium oocyst wall protein for C. parvum, Glutamate dehydrogenase for G. lamblia, and 18S ribosomal RNA (18S rRNA) for C. cayetanensis. The sizes of the amplified fragments were 555, 188, and 400 bps, respectively. The multiplex-touchdown PCR protocol using a primer mixture simultaneously detected protozoa in human stools, and the amplified gene was detected in >1×103 oocysts for C. parvum, >1×104 cysts for G. lamblia, and >1 copy of the 18S rRNA gene for C. cayetanensis. Taken together, our protocol convincingly demonstrated the ability to simultaneously detect C. parvum, G. lamblia, and C. cayetanenesis in stool samples. PMID:27853120

  2. Inverting Comet Acoustic Surface Sounding Experiment (CASSE) touchdown signals to measure the elastic modulus of comet material

    Science.gov (United States)

    Arnold, W.; Faber, C.; Knapmeyer, M.; Witte, L.; Schröder, S.; Tune, J.; Möhlmann, D.; Roll, R.; Chares, B.; Fischer, H.; Seidensticker, K.

    2014-07-01

    The landing of Philae on comet 67P/Churyumov-Gerasimenko is scheduled for November 11, 2014. Each of the three landing feet of Philae house a triaxial acceleration sensor of CASSE, which will thus be the first sensors to be in mechanical contact with the cometary surface. CASSE will be in listening mode to record the deceleration of the lander, when it impacts with the comet at a velocity of approx. 0.5 m/s. The analysis of this data yields information on the reduced elastic modulus and the yield stress of the comet's surface material. We describe a series of controlled landings of a lander model. The tests were conducted in the Landing & Mobility Test Facility (LAMA) of the DLR Institute of Space Systems in Bremen, Germany, where an industrial robot can be programmed to move landers or rovers along predefined paths, allowing to adapt landing procedures with predefined velocities. The qualification model of the Philae landing gear was used in the tests. It consists of three legs manufactured of carbon fiber and metal joints. A dead mass of the size and mass of the lander housing is attached via a damper above the landing gear to represent the lander structure as a whole. Attached to each leg is a foot with two soles and a mechanically driven fixation screw (''ice screw'') to secure the lander on the comet. The right soles, if viewed from the outside towards the lander body, house a Brüel & Kjaer DeltaTron 4506 triaxial piezoelectric accelerometer as used on the spacecraft. Orientation of the three axes was such that one of the axes, here the X-axis of the accelerometer, points downwards, while the Y- and Z-axes are horizontal. Data were recorded at a sampling rate of 8.2 kHz within a time gate of 2 s. In parallel, a video sequence was taken, in order to monitor the touchdown on the sand and the movement of the ice screws. Touchdown measurements were conducted on three types of ground with landing velocities between 0.1 to 1.1 m/s. Landings with low velocities were

  3. Multiple pass laser amplifier system

    Science.gov (United States)

    Brueckner, Keith A.; Jorna, Siebe; Moncur, N. Kent

    1977-01-01

    A laser amplification method for increasing the energy extraction efficiency from laser amplifiers while reducing the energy flux that passes through a flux limited system which includes apparatus for decomposing a linearly polarized light beam into multiple components, passing the components through an amplifier in delayed time sequence and recombining the amplified components into an in phase linearly polarized beam.

  4. WebPASS PP (HR Personnel Management)

    Data.gov (United States)

    US Agency for International Development — WebPass Explorer (WebPASS Framework): USAID is partnering with DoS in the implementation of their WebPass Post Personnel (PS) Module. WebPassPS does not replace...

  5. WebPASS Explorer (HR Personnel Management)

    Data.gov (United States)

    US Agency for International Development — WebPass Explorer (WebPASS Framework): USAID is partnering with DoS in the implementation of their WebPass Post Personnel (PS) Module. WebPassPS does not replace...

  6. Touchdown on Titan

    Science.gov (United States)

    Morring, Frank, Jr.

    2004-01-01

    Europe's Huygens probe is on target for a Dec. 25 separation from the Cassini Saturn orbiter that has carried it like a baby for more than seven years. The probe will spend three weeks coasting to a plunge into Titan's thick atmosphere on the morning of Jan. 14. If all goes as planned, the 349-kg. Huygens will spend more than 2 hr. descending by parachute to the mysterious surface of the planet-sized moon, and hopefully devote yet more time to broadcasting data after it lands. Before the day is over, Huygens is programmed to beam about 30 megabytes of data - including some 1,100 images-back to Earth through Cassini, a trip that will take some 75 min. to complete over the 1- billion-km. distance that separates the two planets. Within that data should be answers to questions that date back to 1655, when Dutch astronomer Christiaan Huygens found the moon with a homemade telescope and named it for the family of giants the ancient Greeks believed once ruled the earth. In the Solar System, there is no other world like Titan, with a nitrogen and methane atmospheric and a cold, hidden surface darker than Earth under the full Moon.

  7. Multi-pass spectroscopic ellipsometry

    Energy Technology Data Exchange (ETDEWEB)

    Stehle, Jean-Louis [Sopralab, 7 rue du Moulin des Bruyeres, 92400 Courbevoie (France); Samartzis, Peter C., E-mail: sama@iesl.forth.gr [Institute of Electronic Structure and Laser, Foundation of Research and Technology-Hellas, Vassilika Vouton 71110, Heraklion Crete (Greece); Stamataki, Katerina [Institute of Electronic Structure and Laser, Foundation of Research and Technology-Hellas, Vassilika Vouton 71110, Heraklion Crete (Greece); Department of Chemistry, University of Crete, Voutes, 71003, Heraklion (Greece); Piel, Jean-Philippe [Sopralab, 7 rue du Moulin des Bruyeres, 92400 Courbevoie (France); Katsoprinakis, George E.; Papadakis, Vassilis [Institute of Electronic Structure and Laser, Foundation of Research and Technology-Hellas, Vassilika Vouton 71110, Heraklion Crete (Greece); Schimowski, Xavier [Sopralab, 7 rue du Moulin des Bruyeres, 92400 Courbevoie (France); Rakitzis, T. Peter [Institute of Electronic Structure and Laser, Foundation of Research and Technology-Hellas, Vassilika Vouton 71110, Heraklion Crete (Greece); Department of Physics, University of Crete, Voutes, 71003, Heraklion (Greece); Loppinet, Benoit [Institute of Electronic Structure and Laser, Foundation of Research and Technology-Hellas, Vassilika Vouton 71110, Heraklion Crete (Greece)

    2014-03-31

    Spectroscopic ellipsometry is an established technique, particularly useful for thickness measurements of thin films. It measures polarization rotation after a single reflection of a beam of light on the measured substrate at a given incidence angle. In this paper, we report the development of multi-pass spectroscopic ellipsometry where the light beam reflects multiple times on the sample. We have investigated both theoretically and experimentally the effect of sample reflectivity, number of reflections (passes), angles of incidence and detector dynamic range on ellipsometric observables tanΨ and cosΔ. The multiple pass approach provides increased sensitivity to small changes in Ψ and Δ, opening the way for single measurement determination of optical thickness T, refractive index n and absorption coefficient k of thin films, a significant improvement over the existing techniques. Based on our results, we discuss the strengths, the weaknesses and possible applications of this technique. - Highlights: • We present multi-pass spectroscopic ellipsometry (MPSE), a multi-pass approach to ellipsometry. • Different detectors, samples, angles of incidence and number of passes were tested. • N passes improve polarization ratio sensitivity to the power of N. • N reflections improve phase shift sensitivity by a factor of N. • MPSE can significantly improve thickness measurements in thin films.

  8. Development and evaluation of an ITS1 "Touchdown" PCR for assessment of drug efficacy against animal African trypanosomosis.

    Science.gov (United States)

    Tran, Thao; Napier, Grant; Rowan, Tim; Cordel, Claudia; Labuschagne, Michel; Delespaux, Vincent; Van Reet, Nick; Erasmus, Heidi; Joubert, Annesca; Büscher, Philippe

    2014-05-28

    Animal African trypanosomoses (AAT) are caused by flagellated protozoa of the Trypanosoma genus and contribute to considerable losses in animal production in Africa, Latin America and South East Asia. Trypanosoma congolense is considered the economically most important species. Drug resistant T. congolense strains present a threat to the control of AAT and have triggered research into discovery of novel trypanocides. In vivo assessment of trypanocidal efficacy relies on monitoring of treated animals with microscopic parasite detection methods. Since these methods have poor sensitivity, follow-up for up to 100 days after treatment is recommended to increase the chance of detecting recurrent parasitaemia waves. Molecular techniques are more amendable to high throughput processing and are generally more sensitive than microscopic detection, thus bearing the potential of shortening the 100-day follow up period. The study presents a "Touchdown" PCR targeting the internal transcribed spacer 1 of the ribosomal DNA (ITS1 TD PCR) that enables detection and discrimination of different Trypanosoma taxa in a single run due to variations in PCR product sizes. The assay achieves analytical sensitivity of 10 parasites per ml of blood for detection of T. congolense savannah type and T. brucei, and 100 parasites per ml of blood for detection of T. vivax in infected mouse blood. The ITS1 TD PCR was evaluated on cattle experimentally infected with T. congolense during an investigational new veterinary trypanocide drug efficacy study. ITS1 TD PCR demonstrated comparable performance to microscopy in verifying trypanocide treatment success, in which parasite DNA became undetectable in cured animals within two days post-treatment. ITS1 TD PCR detected parasite recrudescence three days earlier than microscopy and had a higher positivity rate than microscopy (84.85% versus 57.58%) in 66 specimens of relapsing animals collected after treatments. Therefore, ITS1 TD PCR provides a useful tool

  9. A touchdown nucleic acid amplification protocol as an alternative to culture backup for immunofluorescence in the routine diagnosis of acute viral respiratory tract infections

    Directory of Open Access Journals (Sweden)

    Feeney Susan A

    2004-10-01

    Full Text Available Abstract Background Immunofluorescence and virus culture are the main methods used to diagnose acute respiratory virus infections. Diagnosing these infections using nucleic acid amplification presents technical challenges, one of which is facilitating the different optimal annealing temperatures needed for each virus. To overcome this problem we developed a diagnostic molecular strip which combined a generic nested touchdown protocol with in-house primer master-mixes that could recognise 12 common respiratory viruses. Results Over an 18 month period a total of 222 specimens were tested by both immunofluorescence and the molecular strip. The specimens came from 103 males (median age 3.5 y, 80 females (median age 9 y and 5 quality assurance scheme specimens. Viruses were recovered from a number of specimen types including broncho-alveolar lavage, nasopharyngeal secretions, sputa, post-mortem lung tissue and combined throat and nasal swabs. Viral detection by IF was poor in sputa and respiratory swabs. A total of 99 viruses were detected in the study from 79 patients and 4 quality control specimens: 31 by immunofluorescence and 99 using the molecular strip. The strip consistently out-performed immunofluorescence with no loss of diagnostic specificity. Conclusions The touchdown protocol with pre-dispensed primer master-mixes was suitable for replacing virus culture for the diagnosis of respiratory viruses which were negative by immunofluorescence. Results by immunofluorescence were available after an average of 4–12 hours while molecular strip results were available within 24 hours, considerably faster than viral culture. The combined strip and touchdown protocol proved to be a convenient and reliable method of testing for multiple viruses in a routine setting.

  10. Neuberger's double-pass algorithm

    Science.gov (United States)

    Chiu, Ting-Wai; Hsieh, Tung-Han

    2003-12-01

    We analyze Neuberger’s double-pass algorithm for the matrix-vector multiplication R(H)ṡY [where R(H) is (n-1,n)th degree rational polynomial of positive definite operator H], and show that the number of floating-point operations is independent of the degree n, provided that the number of sites is much larger than the number of iterations in the conjugate gradient. This implies that the matrix-vector product (H)-1/2Y≃R(n-1,n)(H)ṡY can be approximated to very high precision with sufficiently large n, without noticeably extra costs. Further, we show that there exists a threshold nT such that the double-pass is faster than the single pass for n>nT, where nT≃12 25 for most platforms.

  11. Multiple-pass water reuse

    Energy Technology Data Exchange (ETDEWEB)

    Bhattacharyya, D.; Farthing, S.S.; Cheng, C.S.

    1982-02-01

    Low-pressure membranes have definite advantages for the treatment of metal-processing wastewaters and acid mine water. The membrane processes are evaluated in terms of obtaining maximum water recovery (greater than 90%), proper ultrafiltrate quality, multiple-pass water reuse, and concentrate recycle. Various multi-salt solutions containing heavy metals (including cyanide complexes), and acid mine waters have been extensively investigated with a bench-scale unit, and a computer simulation model has been used to scale-up from the laboratory data. Water reuse models are presented for multiple passes. 9 references, 12 figures, 3 tables. (JMT)

  12. Feasibility study: PASS computer environment

    Energy Technology Data Exchange (ETDEWEB)

    None

    1980-03-10

    The Policy Analysis Screening System (PASS) is a computerized information-retrieval system designed to provide analysts in the Department of Energy, Assistant Secretary for Environment, Office of Technology Impacts (DOE-ASEV-OTI) with automated access to articles, computer simulation outputs, energy-environmental statistics, and graphics. Although it is essential that PASS respond quickly to user queries, problems at the computer facility where it was originally installed seriously slowed PASS's operations. Users attempting to access the computer by telephone repeatedly encountered busy signals and, once logged on, experienced unsatisfactory delays in response to commands. Many of the problems stemmed from the system's facility manager having brought another large user onto the system shortly after PASS was implemented, thereby significantly oversubscribing the facility. Although in March 1980 Energy Information Administration (EIA) transferred operations to its own computer facility, OTI has expressed concern that any improvement in computer access time and response time may not be sufficient or permanent. Consequently, a study was undertaken to assess the current status of the system, to identify alternative computer environments, and to evaluate the feasibility of each alternative in terms of its cost and its ability to alleviate current problems.

  13. Supercomputing "Grid" passes latest test

    CERN Multimedia

    Dumé, Belle

    2005-01-01

    When the Large Hadron Collider (LHC) comes online at the CERN in 2007, it will produce more data than any other experiment in the history of physics. Particle physicists have now passed another milestone in their preparations for the LHC by sustaining a continuous flow of 600 megabytes of dat per second (MB/s) for 10 days from the Geneva laboratory to seven sites in Europe and the US (1/2 page)

  14. 27 CFR 9.88 - Pacheco Pass.

    Science.gov (United States)

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false Pacheco Pass. 9.88 Section... Pass. (a) Name. The name of the viticultural area described in this section is “Pacheco Pass.” (b) Approved maps. The appropriate maps for determining the boundaries of Pacheco Pass viticultural area...

  15. 78 FR 62344 - Sabine Pass Liquefaction Expansion, LLC, Sabine Pass Liquefaction, LLC, and Sabine Pass LNG, L.P...

    Science.gov (United States)

    2013-10-18

    ... Sabine Pass LNG, L.P., Cheniere Creole Trail Pipeline, L.P.; Notice of Application Take notice that on... LNG, L.P. (collectively referred to as Sabine Pass) filed with the Federal Energy Regulatory..., construct, and operate additional liquefied natural gas (LNG) export facilities at the Sabine Pass...

  16. WebPASS ICASS (HR Personnel Management)

    Data.gov (United States)

    US Agency for International Development — WebPASS Joint Administrative Support Platforms Post Administrative Software Suite - U.S. Department of State Executive Officers application suite. Web.PASS is the...

  17. When you pass your due date

    Science.gov (United States)

    ... medlineplus.gov/ency/patientinstructions/000515.htm When you pass your due date To use the sharing features ... link between you and your baby. As you pass your due date, the placenta may not work ...

  18. Senate passes clean air bill

    Science.gov (United States)

    In an 89 to 11 vote the Senate passed a clean air bill aimed at reducing pollution by the turn of the century by imposing tougher controls on American industry. The bill is the first revision of the Clean Air Act of 1970 in 13 years and calls for new limits on auto pollution to clean up smog in most U.S. cities, decreasing by half emissions by power plants that cause acid rain to protect the ecology, and increasing technological controls on factories to protect against cancer-causing and toxic substances. The bill will add about $20 billion per year to the estimated $33 billion cost of complying with current pollution laws.

  19. Precision Assembly of Systems on Surfaces (PASS)

    Science.gov (United States)

    2015-02-06

    Precision Assembly of Systems on Surfaces ( PASS ) This program was directed at generating functionalized surfaces and assemblies for electronic and...journals: Number of Papers published in non peer-reviewed journals: Final Report: Precision Assembly of Systems on Surfaces ( PASS ) Report Title This...PRECISION ASSEMBLY OF SYSTEMS ON SURFACES ( PASS ) PI: Timothy M. Swager Massachusetts Institute of Technology Final Report: DARPA, Defense

  20. 33 CFR 117.311 - New Pass.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false New Pass. 117.311 Section 117.311... REGULATIONS Specific Requirements Florida § 117.311 New Pass. The drawspan for the State Road 789 Drawbridge... must be passed at anytime....

  1. Touch the comet! Testing of the "Rosetta's Comet Touchdown" educational kit in the Széchenyi István High School, Sopron, Hungary.

    Science.gov (United States)

    Lang, A.; Wesely, N.; Soós, B.; Sléber, B.; Majnovics, Z.; Ettingshausen, M.; Bodnár, L.; Németh, A.; Roos, M.

    2011-10-01

    In our school works a course in robotics where students build and program robots from a LEGO MINDSTORMS kit. We took part in the Hunveyor- Husar project with a Mars rover based on a rover model kit, of which the operating arms are built out of LEGO and controlled by an MINDSTORMS NXT computer. We presented our rover on the EPSC in Rome last September 2010 We presented our rover on the EPSC in Rome in September 2010. At that same conference the "Rosetta's Comet Touchdown" educational kit was officially presented. We were very interested and in conversation with the people from the project, we agreed that our school in Sopron would also participate in testing the kit. . The kit comes with a set of Interdisciplinary Activity Sheets (IAS, downloadable from Vimeo channel1) and a great feature is that the proposed activities in the IAS cover three areas: science, art/history and engineering. The 31 students from our class divided up in groups and each group chose a different topic: History of comets in Hungarian culture; Designing a T-shirt; Research on comets; Hungary in the Rosetta mission; Animation of Rosetta's orbit in space; building a LEGO MINDSTORM model; a film was made of the activities . In this presentation we report in particular the activities of the LEGO building team.

  2. Triplets pass their pressure test

    CERN Multimedia

    2007-01-01

    All the LHC inner triplets have now been repaired and are in position. The first ones have passed their pressure tests with flying colours. The repaired inner triplet at LHC Point 1, right side (1R). Ranko Ostojic (on the right), who headed the team responsible for repairing the triplets, shows the magnet to Robert Zimmer, President of the University of Chicago and of Fermi Research Alliance, who visited CERN on 20th August.Three cheers for the triplets! All the LHC inner triplets have now been repaired and are in position in the tunnel. Thanks to the mobilisation of a multidisciplinary team from CERN and Fermilab, assisted by the KEK Laboratory and the Lawrence Berkeley National Laboratory (LBNL), a solution has been found, tested, validated and applied. At the end of March this year, one of the inner triplets at Point 5 failed to withstand a pressure test. A fault was identified in the supports of two out of the three quadruple magne...

  3. 33 CFR 110.196 - Sabine Pass Channel, Sabine Pass, Tex.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Sabine Pass Channel, Sabine Pass, Tex. 110.196 Section 110.196 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Anchorage Grounds § 110.196 Sabine Pass Channel, Sabine Pass,...

  4. 78 FR 62657 - Proposed Information Collection; The Interagency Access Pass and Senior Pass Application Processes

    Science.gov (United States)

    2013-10-22

    ... National Park Service Proposed Information Collection; The Interagency Access Pass and Senior Pass... Parks and Federal Recreation Lands Pass Program covers recreation opportunities on public lands managed... U.S. Forest Service. The passes provide U.S. citizens and visitors an affordable and convenient...

  5. Photoacoustic Soot Spectrometer (PASS) Instrument Handbook

    Energy Technology Data Exchange (ETDEWEB)

    Dubey, M [Los Alamos National Laboratory; Springston, S [Brookhaven National Laboratory; Koontz, A [Pacific Northwest National Laboratory; Aiken, A [Los Alamos National Laboratory

    2013-01-17

    The photoacoustic soot spectrometer (PASS) measures light absorption by aerosol particles. As the particles pass through a laser beam, the absorbed energy heats the particles and in turn the surrounding air, which sets off a pressure wave that can be detected by a microphone. The PASS instruments deployed by ARM can also simultaneously measure the scattered laser light at three wavelengths and therefore provide a direct measure of the single-scattering albedo. The Operator Manual for the PASS-3100 is included here with the permission of Droplet Measurement Technologies, the instrument’s manufacturer.

  6. 一种高特异性的改良降落PCR%Modified Touchdown PCR as a High Efficient Approach to Improve the Specificity of PCR

    Institute of Scientific and Technical Information of China (English)

    张贵星; 袁保梅; 许培荣; 王建民; 薛乐勋

    2002-01-01

    To improve the specificity of PCR in detection of genes in genomic DNA, a modified touchdown PCR method was designed by using the common Taq DNA polymerase and the Pfu DNA polymerase with proofreading ability. Genomic DNA was extracted from Dunaliella bardawil, a unicellular and wall-less alga being able to propagate in solution of high concentration of NaCl. Two kinds of PCR using Taq and Pfu DNA polymerases were carried out, utilizing the genomic DNA mentioned above as a template, to amplify the upstream promoter sequence of the cbr (carotene biosynthesis-related) gene. Traditional PCR was used as control. Electrophoresis of the PCRs using Taq DNA polymerase demonstrated that TD-PCR produced a single band of 1 272 bp which was corresponding to the expected cbr promoter, in contrast, however, in the lane of common PCR, two extra nonspecific bands appeared as well as the expected 1 272 bp band. PCRs using the Pfu DNA polymerase displayed that common PCR program generated two bands of 1 272 bp and 500 bp, while the TD-PCR program brought about only the expected 1 272 bp band. PCRs using modified touchdown PCR program with both kinds of polymerase were of higher specificity than common PCR. The modified TD-PCR program can efficiently improve the specificity of PCR. Similar programs are expected to clone gene fragments that are difficult to be cloned by the common PCR method, or to raise the specificity of PCR in which the false positives are difficult to be eliminated.%为提高基因组DNA中的基因PCR检出的特异性,设计了一种改良的降落PCR程序,并分别用TaqDNA聚合酶及高保真Pfu DNA聚合酶进行实验.自盐藻Dunaliella bardawil中提取基因组DNA作为PCR模板,使用Taq DNA聚合酶及Pfu DNA聚合酶,运用普通PCR和降落PCR程序,扩增胡萝卜素生物合成相关基因(cbr)上游启动子序列,并电泳比较PCR扩增产物的特异性.结果显示,使用普通Taq酶PCR,普通PCR程序产生200bp,500bp和1272 bp长的三条

  7. A touchdown PCR for the differentiation of equine herpesvirus type 1 (EHV-1) field strains from the modified live vaccine strain RacH.

    Science.gov (United States)

    Osterrieder, N; Hübert, P H; Brandmüller, C; Kaaden, O R

    1994-12-01

    More than 50 reference strains and field isolates of equine herpesvirus type 1 (EHV-1) were examined by a touchdown PCR. Primers for specific amplification of EHV-1 DNA were chosen from the terminal and internal repeat regions of the EHV-1 genome where the high-passaged live vaccine strain RacH displays symmetric 850 bp deletions. The positive strand and one negative strand primer were designed to encompass the deletions present in RacH, and the second negative strand primer was designed to hybridize within these deletions. Discrimination between field isolates and the vaccine strain was achieved by the generation of amplification products of different size: In all EHV-1 reference strains and field isolates, a 495 bp DNA fragment was amplified specifically, whereas a 310 bp fragment was amplified when DNA of the vaccine strain RacH was used as a template. PCR amplification was only obtained in the presence of 8-10% dimethylsulfoxide and when the primer annealing temperatures were decreased stepwise from 72 degrees C to 60 degrees C. Under these conditions as little as 100 fg template DNA, corresponding to about 100 genome equivalents, could be detected. The PCR assay allows fast and sensitive discrimination of the modified live vaccine strain RacH from field strains of EHV-1 since it is applicable to viral DNA extracted from organ samples and paraffin-embedded tissues. It may thus be helpful for examining the potential involvement of the RacH live vaccine strain in abortions of vaccinated mares.

  8. 78 FR 25432 - Sabine Pass LNG, L.P., Sabine Pass Liquefaction, LLC; Notice of Availability of the Environmental...

    Science.gov (United States)

    2013-05-01

    ... Energy Regulatory Commission Sabine Pass LNG, L.P., Sabine Pass Liquefaction, LLC; Notice of Availability... Sabine Pass Sabine Pass LNG, L.P. and Sabine Pass Liquefaction, LLC (Sabine Pass) in the above-referenced... construction at the existing Sabine Pass LNG terminal in Cameron Parish, Louisiana. The EA assesses...

  9. 33 CFR 117.487 - Pierre Pass.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Pierre Pass. 117.487 Section 117.487 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Louisiana § 117.487 Pierre Pass. The draw of the S70...

  10. Ulysses Passes South Pole of Sun

    Institute of Scientific and Technical Information of China (English)

    程林

    1995-01-01

    On the 14th of September,1994, the fastest scientific instrument in space passed the south pole of the Sun,a place where no human-made object has been before. A spaceprobe called Ulysses made the polar pass at about midday as it continued to collect data on the solar wind,a stream of high-energy sub-atomic

  11. 33 CFR 117.484 - Pass Manchac.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Pass Manchac. 117.484 Section 117.484 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Louisiana § 117.484 Pass Manchac. The draw of the...

  12. 33 CFR 117.303 - Matlacha Pass.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Matlacha Pass. 117.303 Section 117.303 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Florida § 117.303 Matlacha Pass. The draw of the...

  13. 77 FR 65546 - Sabine Pass Liquefaction, LLC; Sabine Pass LNG, L.P.; Notice of Petition To Amend Authorizations...

    Science.gov (United States)

    2012-10-29

    ... Energy Regulatory Commission Sabine Pass Liquefaction, LLC; Sabine Pass LNG, L.P.; Notice of Petition To... Pass Liquefaction, LLC and Sabine Pass LNG, L.P. (collectively, Sabine Pass), 700 Milam Street, Suite... and operate certain related facilities (Modification Project) at the existing Sabine Pass LNG...

  14. 78 FR 62319 - Golden Pass Products, LLC, Golden Pass Pipeline, LLC; Notice of Intent To Prepare an...

    Science.gov (United States)

    2013-10-16

    ... Energy Regulatory Commission Golden Pass Products, LLC, Golden Pass Pipeline, LLC; Notice of Intent To Prepare an Environmental Assessment for the Planned Golden Pass LNG Export Project and Golden Pass Export... operation of the Golden Pass Liquefied Natural Gas (LNG) Project and Golden Pass Export Pipeline...

  15. 78 FR 66909 - Sabine Pass Liquefaction, LLC; Sabine Pass LNG, L.P.; Notice of Application to Amend...

    Science.gov (United States)

    2013-11-07

    ... Energy Regulatory Commission Sabine Pass Liquefaction, LLC; Sabine Pass LNG, L.P.; Notice of Application... Sabine Pass Liquefaction, LLC and Sabine Pass LNG, L.P. (collectively, Sabine Pass), 700 Milam Street...,006 Bcf per year). Sabine Pass' requested increase in authorized capacity is an increase from...

  16. Message passing for quantified Boolean formulas

    CERN Document Server

    Zhang, Pan; Zdeborová, Lenka; Zecchina, Riccardo

    2012-01-01

    We introduce two types of message passing algorithms for quantified Boolean formulas (QBF). The first type is a message passing based heuristics that can prove unsatisfiability of the QBF by assigning the universal variables in such a way that the remaining formula is unsatisfiable. In the second type, we use message passing to guide branching heuristics of a Davis-Putnam Logemann-Loveland (DPLL) complete solver. Numerical experiments show that on random QBFs our branching heuristics gives robust exponential efficiency gain with respect to the state-of-art solvers. We also manage to solve some previously unsolved benchmarks from the QBFLIB library. Apart from this our study sheds light on using message passing in small systems and as subroutines in complete solvers.

  17. How to pass higher English colour

    CERN Document Server

    Bridges, Ann

    2009-01-01

    How to Pass is the Number 1 revision series for Scottish qualifications across the three examination levels of Standard Grade, Intermediate and Higher! Second editions of the books present all of the material in full colour for the first time.

  18. Automated Procedure for Roll Pass Design

    Science.gov (United States)

    Lambiase, F.; Langella, A.

    2009-04-01

    The aim of this work has been to develop an automatic roll pass design method, capable of minimizing the number of roll passes. The adoption of artificial intelligence technologies, particularly expert systems, and a hybrid model for the surface profile evaluation of rolled bars, has allowed us to model the search for the minimal sequence with a tree path search. This approach permitted a geometrical optimization of roll passes while allowing automation of the roll pass design process. Moreover, the heuristic nature of the inferential engine contributes a great deal toward reducing search time, thus allowing such a system to be employed for industrial purposes. Finally, this new approach was compared with other recently developed automatic systems to validate and measure possible improvements among them.

  19. A multiple touchdown PCR for detection of Streptococcus pneumonia,Haemophilus influenzae type b in sputum samples%多重降落PCR检测痰标本肺炎链球菌与b型流感嗜血杆菌

    Institute of Scientific and Technical Information of China (English)

    罗欲承; 杜蓬; 赵建忠; 段秀杰; 侯艳娇; 潘红; 邵世和

    2012-01-01

    目的:建立可同时检测痰标本中肺炎链球菌(Streptococcus pneumoniae,Sp)与b型流感嗜血杆菌(Haemophilus influenzae type b,Hib)的多重降落PCR.方法:以Sp cpsA基因、Hib capⅡ区为靶标设计引物,并用PrimerBLAST在线软件检测其特异性,多重降落PCR检测492份痰标本,并以标准菌株作为对照,结果与细菌培养法进行比较.结果:所建立的多重降落PCR对Sp、Hib的检测下限分别达6.3pg、0.2 pg;与细菌培养法相比,灵敏度及总灵敏度均达100%,检测Sp、Hib特异性分别为94%、98%,总特异性达92%.结论:所建立的多重降落PCR具有高灵敏度与特异性,可作为Sp、Hib感染的快速诊断与流行病学研究的备选手段.%Objective: To develop a multiple touchdown PCR for simultaneous detection of Streptococcus pneumonia, Haemophilia influenzae type b in sputum samples. Methods: Primers based on cpsA, the region Ⅱ of cap were designed for Sp, Hib detection respectively, and their specificities were validated using Primer-BLAST. These primers were mixed in a multiple touchdown PCR amplification system and 492 sputum samples were detected. Standard strains were as controls and the results were compared with which of bacteria culture method. Results; The Sp and Hib detection limits of the multiple touchdown PCR assay were 6.3 pg, 0.2 pg respectively. The sensitivities of both genes were all 100% in contrast with bacteria culture method. The specificities of both genes were 94% , 98% respectively and total specificity was 92%. Conclusion: A higher sensitivity and specificity multiple touchdown PCR assay was developed, and it could be an alternative method for rapid clinical diagnosis and epidemiological study of Sp, and Hib infection.

  20. Torch Relay:Love Is Passing on

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    @@ May is not an ordinary month for the whole China, as the 8.0-magnitude earthquake hit sonthwest of China and shocked thc whole nation. And now, the torch relay in China is endowed with more responsibility and significance: to pass on the passion, also the compassion. No matter the torch relay is paused or going on, Olym-pic spirit is passing on. So is the love.

  1. SCALAR MULTI-PASS ATOMIC MAGNETOMETER

    Science.gov (United States)

    2017-08-01

    active volume including relaxation on cell walls. 4 Approved for public release; distribution is unlimited. Fig. 6...measurements, and suppression of spin-exchange relaxation to achieve the highest sensitivity per unit volume. We developed a new multi-pass cell geometry...suppression of spin-exchange relaxation to achieve the highest sensitivity per unit volume. During the project we developed a new multi-pass cell geometry

  2. Message Passing Framework for Globally Interconnected Clusters

    Science.gov (United States)

    Hafeez, M.; Asghar, S.; Malik, U. A.; Rehman, A.; Riaz, N.

    2011-12-01

    In prevailing technology trends it is apparent that the network requirements and technologies will advance in future. Therefore the need of High Performance Computing (HPC) based implementation for interconnecting clusters is comprehensible for scalability of clusters. Grid computing provides global infrastructure of interconnecting clusters consisting of dispersed computing resources over Internet. On the other hand the leading model for HPC programming is Message Passing Interface (MPI). As compared to Grid computing, MPI is better suited for solving most of the complex computational problems. MPI itself is restricted to a single cluster. It does not support message passing over the internet to use the computing resources of different clusters in an optimal way. We propose a model that provides message passing capabilities between parallel applications over the internet. The proposed model is based on Architecture for Java Universal Message Passing (A-JUMP) framework and Enterprise Service Bus (ESB) named as High Performance Computing Bus. The HPC Bus is built using ActiveMQ. HPC Bus is responsible for communication and message passing in an asynchronous manner. Asynchronous mode of communication offers an assurance for message delivery as well as a fault tolerance mechanism for message passing. The idea presented in this paper effectively utilizes wide-area intercluster networks. It also provides scheduling, dynamic resource discovery and allocation, and sub-clustering of resources for different jobs. Performance analysis and comparison study of the proposed framework with P2P-MPI are also presented in this paper.

  3. MAP Estimation, Message Passing, and Perfect Graphs

    CERN Document Server

    Jebara, Tony S

    2012-01-01

    Efficiently finding the maximum a posteriori (MAP) configuration of a graphical model is an important problem which is often implemented using message passing algorithms. The optimality of such algorithms is only well established for singly-connected graphs and other limited settings. This article extends the set of graphs where MAP estimation is in P and where message passing recovers the exact solution to so-called perfect graphs. This result leverages recent progress in defining perfect graphs (the strong perfect graph theorem), linear programming relaxations of MAP estimation and recent convergent message passing schemes. The article converts graphical models into nand Markov random fields which are straightforward to relax into linear programs. Therein, integrality can be established in general by testing for graph perfection. This perfection test is performed efficiently using a polynomial time algorithm. Alternatively, known decomposition tools from perfect graph theory may be used to prove perfection ...

  4. Efficient, Narrow-Pass-Band Optical Filters

    Science.gov (United States)

    Sandford, Stephen P.

    1996-01-01

    Optical filters with both narrow pass bands and high efficiencies fabricated to design specifications. Offer tremendous improvements in performance for number of optical (including infrared) systems. In fiber-optic and free-space communication systems, precise frequency discrimination afforded by narrow pass bands of filters provide higher channel capacities. In active and passive remote sensors like lidar and gas-filter-correlation radiometers, increased efficiencies afforded by filters enhance detection of small signals against large background noise. In addition, sizes, weights, and power requirements of many optical and infrared systems reduced by taking advantage of gains in signal-to-noise ratios delivered by filters.

  5. Contact conditions in skin-pass rolling

    DEFF Research Database (Denmark)

    Kijima, Hideo; Bay, Niels

    2007-01-01

    The special contact conditions in skin-pass rolling of steel strip is analysed by studying plane strain upsetting of thin sheet with low reduction applying long narrow tools and dry friction conditions. An extended sticking region is estimated by an elasto-plastic FEM analysis of the plane strain...... upsetting. This sticking region causes a highly inhomogeneous elasto-plastic deformation with large influence of work-hardening and friction. A numerical analysis of skin-pass rolling shows the same contact conditions, i.e. an extended sticking region around the center of the contact zone. The calculated...

  6. All Pass Network Based MSO Using OTRA

    Directory of Open Access Journals (Sweden)

    Rajeshwari Pandey

    2015-01-01

    Full Text Available This paper presents multiphase sinusoidal oscillators (MSOs using operational transresistance amplifier (OTRA based all pass networks. Both even and odd phase oscillations of equal amplitudes which are equally spaced in phase can be produced using single all pass section per phase. The proposed MSOs provide voltage output and can readily be used for driving voltage input circuits without increasing component count. The effect of nonideality of OTRA on the circuit performance is also analysed. The functionality of the proposed circuit is verified through PSPICE simulations.

  7. 76 FR 9573 - Sabine Pass Liquefaction, LLC and Sabine Pass LNG, L.P.; Notice of Application

    Science.gov (United States)

    2011-02-18

    ... Energy Regulatory Commission Sabine Pass Liquefaction, LLC and Sabine Pass LNG, L.P.; Notice of Application Take notice that on January 31, 2011, Sabine Pass Liquefaction, LLC and Sabine Pass LNG, L.P... (Liquefaction Project) at the existing Sabine Pass LNG Terminal, located in Cameron Parish, Louisiana....

  8. 33 CFR 401.31 - Meeting and passing.

    Science.gov (United States)

    2010-07-01

    ..., no vessel shall overtake and pass or attempt to overtake and pass another vessel— (1) In any canal; (2) Within 600 m of a canal or lock entrance; or (3) After the order of passing through has...

  9. Modeling drivers' passing duration and distance in a virtual environment

    Directory of Open Access Journals (Sweden)

    Haneen Farah

    2013-07-01

    The main contribution of this paper is in the empirical models developed for passing duration and distance which highlights the factors that affect drivers' passing behavior and can be used to enhance the passing models in simulation programs.

  10. Generalizing Galileo's passé-dix game

    Science.gov (United States)

    Hombas, Vassilios

    2012-07-01

    This article shows a generalization of Galileo's 'passé-dix' game. The game was born following one of Galileo's [G. Galileo, Sopra le Scoperte dei Dadi (Galileo, Opere, Firenze, Barbera, Vol. 8). Translated by E.H. Thorne, 1898, pp. 591-594] explanations on a paradox that occurred in the experiment of tossing three fair 'six-sided' dice.

  11. The Physics of "String Passing through Ice"

    Science.gov (United States)

    Mohazzabi, Pirooz

    2011-01-01

    One of the oldest yet interesting experiments related to heat and thermodynamics is placing a string on a block of ice and hanging two masses from the ends of the string. Sometime later, it is discovered that the string has passed through the ice without cutting it in half. A simple explanation of this effect is that the pressure caused by the…

  12. Clandestine Message Passing in Virtual Environments

    Science.gov (United States)

    2008-09-01

    Steganography Hiding messages in pictures, audio , packets Place messages in clothing textures, object files Bots Automate the logic and control of...information will be developed along with proof of concepts. Visual cues, steganography and autonomous bots will be examined. Monitoring techniques are...14. SUBJECT TERMS Message Passing, Virtual Environments, Steganography , Second Life, Internet Terrorism, Honeyworld, Sun MPK20, Clandestine Messages

  13. PASS: Creating Physically Active School Systems

    Science.gov (United States)

    Ciotto, Carol M.; Fede, Marybeth H.

    2014-01-01

    PASS, a Physically Active School System, is a program by which school districts and schools utilize opportunities for school-based physical activity that enhance overall fitness and cognition, which can be broken down into four integral parts consisting of connecting, communicating, collaborating, and cooperating. There needs to be an…

  14. A characterization of attribute evaluation in passes

    NARCIS (Netherlands)

    Alblas, Henk

    1981-01-01

    This paper describes the evaluation of semantic attributes in a bounded number of passes from left-to-right and/or from right-to-left over the derivation tree of a program. Evaluation strategies where different instances of the same attribute in any derivation tree are restricted to be evaluated in

  15. Generalizing Galileo's Passe-Dix Game

    Science.gov (United States)

    Hombas, Vassilios

    2012-01-01

    This article shows a generalization of Galileo's "passe-dix" game. The game was born following one of Galileo's [G. Galileo, "Sopra le Scoperte dei Dadi" (Galileo, Opere, Firenze, Barbera, Vol. 8). Translated by E.H. Thorne, 1898, pp. 591-594] explanations on a paradox that occurred in the experiment of tossing three fair "six-sided" dice.…

  16. HyperPASS, a New Aeroassist Tool

    Science.gov (United States)

    Gates, Kristin; McRonald, Angus; Nock, Kerry

    2005-01-01

    A new software tool designed to perform aeroassist studies has been developed by Global Aerospace Corporation (GAC). The Hypersonic Planetary Aeroassist Simulation System (HyperPASS) [1] enables users to perform guided aerocapture, guided ballute aerocapture, aerobraking, orbit decay, or unguided entry simulations at any of six target bodies (Venus, Earth, Mars, Jupiter, Titan, or Neptune). HyperPASS is currently being used for trade studies to investigate (1) aerocapture performance with alternate aeroshell types, varying flight path angle and entry velocity, different gload and heating limits, and angle of attack and angle of bank variations; (2) variable, attached ballute geometry; (3) railgun launched projectile trajectories, and (4) preliminary orbit decay evolution. After completing a simulation, there are numerous visualization options in which data can be plotted, saved, or exported to various formats. Several analysis examples will be described.

  17. UN-aided Project Passing Final Assessment

    Institute of Scientific and Technical Information of China (English)

    Wang Anfang

    1995-01-01

    @@ A number of projects funded by the United Nations Development Program passed final examination and assessment in April 1994.They are the well-completion technical center project of the Southwest Petroleum Institute with a fund of 1.27 million US dollars and the acidizing and fracturing technical service center of Wanzhuang Branch Research Institute of Petroleum Exploration and Development (RIPED) with a fund of 1.41 million US dollars.

  18. Low Pass Filters with Linear Phase.

    Science.gov (United States)

    1985-12-12

    DISCUSSION OF RESULTS............................... 35 LIST OF ILLUSTRATIONS Figure page 1. Template applicable to single stage linear phase filter .................. 2...technology suggests examination of the low-pass lin- ear phase filter as a means of prefiltering such data before, or concurrently with, sam- pling. Today, a...stage low passlinear phase filter . Here, M is the number of "main poles". A linear phase design alsorequires a minimum overhead of two "corrector poles

  19. Price pass-through and minimum wages

    OpenAIRE

    Daniel Aaronson

    1997-01-01

    A textbook consequence of competitive markets is that an industry-wide increase in the price of inputs will be passed on to consumers through an increase in prices. This fundamental implication has been explored by researchers interested in who bears the burden of taxation and exchange rate fluctuations. However, little attention has focused on the price implications of minimum wage hikes. From a policy perspective, this is an oversight. Welfare analysis of minimum wage laws should not ignore...

  20. 30 CFR 57.19018 - Overtravel by-pass switches.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Overtravel by-pass switches. 57.19018 Section... Hoisting Hoists § 57.19018 Overtravel by-pass switches. When an overtravel by-pass switch is installed, the... switch is held in the closed position by the hoistman. The overtravel by-pass switch shall...

  1. 30 CFR 56.19018 - Overtravel by-pass switches.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Overtravel by-pass switches. 56.19018 Section... Hoisting Hoists § 56.19018 Overtravel by-pass switches. When an overtravel by-pass switch is installed, the... switch is held in the closed position by the hoistman. The overtravel by-pass switch shall...

  2. 20 CFR 416.2099 - Compliance with pass-along.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 2 2010-04-01 2010-04-01 false Compliance with pass-along. 416.2099 Section... pass-along. (a) Information regarding compliance. Any State required to enter into a pass-along... Commissioner's satisfaction that the State is meeting the pass-along requirements. The information...

  3. O Serogroup-Specific Touchdown-Multiplex Polymerase Chain Reaction for Detection and Identification of Vibrio cholerae O1, O139, and Non-O1/Non-O139

    Directory of Open Access Journals (Sweden)

    Adisak Bhumiratana

    2014-01-01

    Full Text Available A novel, sensitive locus-specific touchdown-multiplex polymerase chain reaction (TMPCR, which is based on two-stage amplification pertaining to multiplex PCR and conditional touchdown strategy, was used in detecting and differentiating Vibrio cholerae serogroups. A panel of molecular marker-based TMPCR method generates reproducible profiles of V. cholerae-specific (588 bp amplicons derived from ompW gene encoding the outer membrane protein and serogroup-specific amplicons, 364 bp for the O1 and 256 bp for the O139, authentically copied from rfb genes responsible for the lipopolysaccharide biosynthesis. The TMPCR amplification efficiency yields either equally or unequally detectable duplex DNA bands of the O1 (588 and 364 bp and O139 (588 and 256 bp or a DNA fragment of non-O1/non-O139 (588 bp while providing no false positive identifications using the genomic DNA templates of the other vibrios and Enterobacteriaceae. The reciprocal analysis of two-template combinations demonstrated that, using V. cholerae O1, O139, or equally mixed O1 and O139, the TMPCR had a detection limit of as low as 100 pg of the O1, O139, or non-O1/non-O139 in reactions containing unequally or equally mixed gDNAs. In addition, the O serogroup-specific TMPCR method had 100% agreement with the serotyping method when examined for the serotyped V. cholerae reference strains and those recovered from clinical samples. The potential benefit of using this TMPCR tool would augment the serotyping method used in epidemiological surveillance and monitoring of V. cholerae serogroups, O1, O139, and non-O1/non-O139 present in clinical and environmental samples.

  4. Effect of Ball Mass on Dribble, Pass, and Pass Reception in 9-11-Year-Old Boys' Basketball

    Science.gov (United States)

    Arias, Jose L.; Argudo, Francisco M.; Alonso, Jose I.

    2012-01-01

    The objective of the study was to analyze the effect of ball mass on dribble, pass, and pass reception in real game situations in 9-11-year-old boys' basketball. Participants were 54 boys identified from six federated teams. The independent variable was ball mass, and dependent variables were number of dribbles, passes, and pass receptions. Three…

  5. 78 FR 1851 - Sabine Pass Liquefaction, LLC and Sabine Pass LNG, L.P.; Notice of Intent To Prepare an...

    Science.gov (United States)

    2013-01-09

    ... Energy Regulatory Commission Sabine Pass Liquefaction, LLC and Sabine Pass LNG, L.P.; Notice of Intent To Prepare an Environmental Assessment for the Proposed Sabine Pass Liquefaction Modification Project and... impacts of the Sabine Pass Liquefaction Modification Project (Project) involving the modification...

  6. 75 FR 68347 - Sabine Pass Liquefaction LLC, and Sabine Pass LNG, L.P.; Notice of Intent To Prepare an...

    Science.gov (United States)

    2010-11-05

    ... Energy Regulatory Commission Sabine Pass Liquefaction LLC, and Sabine Pass LNG, L.P.; Notice of Intent To Prepare an Environmental Assessment for the Planned Sabine Pass Liquefaction Project and Request for... impacts of the Sabine Pass Liquefaction Project (Project) involving construction and operation...

  7. Polymorphic Endpoint Types for Copyless Message Passing

    Directory of Open Access Journals (Sweden)

    Viviana Bono

    2011-07-01

    Full Text Available We present PolySing#, a calculus that models process interaction based on copyless message passing, in the style of Singularity OS. We equip the calculus with a type system that accommodates polymorphic endpoint types, which are a variant of polymorphic session types, and we show that well-typed processes are free from faults, leaks, and communication errors. The type system is essentially linear, although linearity alone may leave room for scenarios where well-typed processes leak memory. We identify a condition on endpoint types that prevents these leaks from occurring.

  8. Electronically Tunable Fractional Order All Pass Filter

    Science.gov (United States)

    Verma, Rakesh; Pandey, Neeta; Pandey, Rajeshwari

    2017-08-01

    In this paper, an electronically tunable fractional order all pass filter (FOAPF) based on operational transconductance amplifier (OTA) is presented. It uses two OTAs and single fractional order capacitor (FC) of non-integer order α to provide FOAPF of α order. Two different values of α, in particular 0.5 and 0.9, for FC are taken for investigation. The functionality of the proposal is verified through SPICE simulations using TSMC 0.18 μm Complementary Metal Oxide Semiconductor (CMOS) process parameters. Simulated and theoretical frequency and time domain responses are found to be in close agreement.

  9. Compressive Imaging via Approximate Message Passing

    Science.gov (United States)

    2015-09-04

    20] uses an adaptive Wiener filter [21] for 2D denoising. Another option is to use a more sophisticated image 2D denoiser such as BM3D [22] within AMP... filtering ,” IEEE Trans. Image Process ., vol. 16, no. 8, pp. 2080–2095, Aug. 2007. [23] J. Tan, Y. Ma, H. Rueda, D. Baron, and G. Arce, “Application of...JOURNAL OF SELECTED TOPICS IN in Signal Processing , (06 2015): 1. doi: Jin Tan, Yanting Ma, Dror Baron. Compressive Imaging via Approximate MessagePassing

  10. An experimental evaluation of multi-pass solar air heaters

    Energy Technology Data Exchange (ETDEWEB)

    Satcunanathan, S.; Persad, P.

    1980-12-01

    Three collectors of identical dimensions but operating in the single-pass, two-pass and three-pass modes were tested simultaneously under ambient conditions. It was found that the two-pass air heater was consistently better than the single-pass air heater over the day for the range of mass flow rates considered. It was also found that at a mass flow rate of 0.0095 kg s/sup -1/ m/sup -2/, the thermal performances of the two-pass and three-pass collectors were identical, but at higher flow rates the two-pass collector was superior to the three-pass collector, the superiority decreasing with increasing mass flow rate.

  11. Video Records and Extracted Data - July 2005 HURL Cruise

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — First reconnaissance at Jarvis Island, Palmyra Atoll, and Kingman Reef, Line Islands, for species diversity, community structure, deep-water habitats, and bottom...

  12. ABM Drag_Pass Report Generator

    Science.gov (United States)

    Fisher, Forest; Gladden, Roy; Khanampornpan, Teerapat

    2008-01-01

    dragREPORT software was developed in parallel with abmREPORT, which is described in the preceding article. Both programs were built on the capabilities created during that process. This tool generates a drag_pass report that summarizes vital information from the MRO aerobreaking drag_pass build process to facilitate both sequence reviews and provide a high-level summarization of the sequence for mission management. The script extracts information from the ENV, SSF, FRF, SCMFmax, and OPTG files, presenting them in a single, easy-to-check report providing the majority of parameters needed for cross check and verification as part of the sequence review process. Prior to dragReport, all the needed information was spread across a number of different files, each in a different format. This software is a Perl script that extracts vital summarization information and build-process details from a number of source files into a single, concise report format used to aid the MPST sequence review process and to provide a high-level summarization of the sequence for mission management reference. This software could be adapted for future aerobraking missions to provide similar reports, review and summarization information.

  13. PASSING STANDARDIZED ASSESSMENTS WITH FADING PROMPTS

    Directory of Open Access Journals (Sweden)

    Amy Marie GREENE

    2015-11-01

    Full Text Available Introduction: No Child Left Behind Act of 2001 mandates that all students perform at a level of proficient on state assessments. This includes students with learning and intellectual disabilities who are inherently performing below grade level. Given that schools are held accountable for meeting these goals and some states are not allowing students to graduate if they do not pass the assessments, this is a large concern for students, parents, teachers, and administration Method: Forty-five students with a disability in writing or an intellectual disability participated in this quasi-experimental, single-group, pretest-posttest design that evaluated the effectiveness of the Fading Prompts through Graphic Organizers method for students with learning and intellectual disabilities in written expression as measured according to the Pennsylvania System of School Assessment. Results: Data analyses were conducted through the use of four dichotomies for percent differences, which compared teacher administered pretests and posttests, pretests and the state administered PSSA, teacher administered posttests and the PSSA, and the participants’ PSSA and the average state PSSA score. All forty-five students performed at a below basic level during baseline and a proficient level on the posttest. The learned skills generalized to the PSSA with forty-three students earning a passing score of proficient, while two students advanced to basic. Conclusion: Based on the outcomes of this study, it is highly recommended that this program be utilized at least for students with learning and intellectual disabilities until further research can be done.

  14. A Multifunction Filter for Realizing Gain Variable Low-Pass and Band-Pass Responses

    Directory of Open Access Journals (Sweden)

    Halil ALPASLAN

    2010-02-01

    Full Text Available The second generation current conveyors (CCIIs as active circuit devices are widely used for designing current-mode (CM filters. In this paper, a single input multi output filter employing only plus-type CCIIs (CCII+s and grounded capacitors, and for providing variable gain low-pass and band-pass responses, is suggested. The proposed filter is free from critical passive component matching conditions. Therefore, it is suitable for integrated circuit (IC technology. Further, developed filter configuration can be easily realized with commercially available active devices such as AD844s. The circuit performance is demonstrated by means of SPICE simulation and experimental test results.

  15. Zika May Be Passed on Through Tears, Sweat: Report

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_161204.html Zika May Be Passed on Through Tears, Sweat: Report ... 2016 WEDNESDAY, Sept. 28, 2016 (HealthDay News) -- The Zika virus might be able to pass from person ...

  16. Enhanced transmittance of a dual pass-band metamaterial filter

    Science.gov (United States)

    Wang, XiaoZhi; Zhu, Honghui; Liu, Zhigang

    2017-03-01

    A broad pass-band metamaterial-based optical filter is experimentally and numerically studied. The designed structure consists of periodically arranged composite metallic arrays and dielectric layer that exhibits transmission responses composed of two flat pass-bands. The coupling of localized surface plasmon (LSP) modes results in the low-frequency pass-band, while the internal surface plasmon polaritons (ISPPs) between the upper and lower metal layers leads to the high-frequency pass-band. Structural parameters (L and R) are experimentally considered from the viewpoint of exploiting their effects on the pass-bands and resonance frequencies. The bandwidths of these pass-bands both can reach to maximums by optimization of these structural parameters. In addition, the two pass-bands can be modulated to be a single pass-band with a bandwidth of 10.7 THz by optimizing L and R simultaneously.

  17. The baton passes to the LHC

    CERN Multimedia

    CERN Bulletin

    2011-01-01

    Held in the picturesque mountain setting of La Thuile in the Italian Alps, the international conference “Rencontres de Moriond” showed how the baton of discovery in the field of high-energy physics is definitely passing to the LHC experiments. In the well-known spirit of Moriond, the conference was an important platform for young students to present their latest results. The Higgs boson might well be within reach this year and the jet-quenching phenomenon might reveal new things soon…   New physics discussed over the Italian Alps during the "Les rencontres de Moriond" conference.  (Photographer: Paul Gerritsen. Adapted by Katarina Anthony) Known by physicists as one of the most important winter conferences, “Les rencontres de Moriond” are actually a series of conferences spread over two weeks covering the main themes of electroweak interactions, QCD and high-energy interactions, cosmology, gravitation, astropar...

  18. The Pension Fund passes important milestones

    CERN Multimedia

    2012-01-01

    In this column, the Chairman of the Pension Fund Governing Board (PFGB) presents the Board's latest main decisions, initiatives and accomplishments to the Fund's members and beneficiaries.   Since my last report in October, the PFGB has passed several milestones in actuarial, technical and investment matters. The PFGB has completed an analysis of a request by the European Organisation for Astronomical Research in the Southern Hemisphere (ESO) to reduce the increased cost of pension insurance for new ESO recruits that has been caused by the increased CHF/€ exchange ratio. Currently the staff of ESO are admitted to the CERN Pension Fund, pursuant to a co-operation agreement between CERN and ESO dating back to 1968. This analysis assessed the actuarial, financial, administrative and legal implications, and is scheduled to be presented to the CERN Council and the Finance Committee in December. After an open tendering process the PFGB has selected Buck Consultants Limited...

  19. Message Passing for Dynamic Network Energy Management

    CERN Document Server

    Kraning, Matt; Lavaei, Javad; Boyd, Stephen

    2012-01-01

    We consider a network of devices, such as generators, fixed loads, deferrable loads, and storage devices, each with its own dynamic constraints and objective, connected by lossy capacitated lines. The problem is to minimize the total network objective subject to the device and line constraints, over a given time horizon. This is a large optimization problem, with variables for consumption or generation in each time period for each device. In this paper we develop a decentralized method for solving this problem. The method is iterative: At each step, each device exchanges simple messages with its neighbors in the network and then solves its own optimization problem, minimizing its own objective function, augmented by a term determined by the messages it has received. We show that this message passing method converges to a solution when the device objective and constraints are convex. The method is completely decentralized, and needs no global coordination other than synchronizing iterations; the problems to be...

  20. L'avenir au passé

    Directory of Open Access Journals (Sweden)

    Lionel Acher

    2000-05-01

    Full Text Available Il n'y a, bien évidemment, aucun mérite dans un roman historique à faire prédire par un personnage ou par le narrateur lui-même quels seront les événements du futur. Ce type de roman étant, par définition, consacré à la narration d'une intrigue située dans le passé et à la recons­titution d'une époque révolue (quelquefois, comme c'est le cas dans notre corpus de romans, depuis près de vingt siècles, point n'est besoin d'être grand clerc pour annoncer un avenir que l'historiographie a ampleme...

  1. An Active Tracking Band-Pass Filter,

    Science.gov (United States)

    1985-05-01

    Cette boucle comporte un amplificateur i commande automatique de gain et un convertisseur de fr~quence A tension rapides ainsi qu’un filtre passe-bas...attenuates the DC voltage and low-frequency fluctuations that accompany the output. 3.4 Frequency-to-Voltage Converter and Voltage Adaptor The output of the...m 0..’C X dC ., m o) ICU...C X CC. a,.. a V1 CCr.4 CC - CC 4 0 0 oC w4 rCC 6~..I 0 =1I .X C .C 0 C cC ’ C.C E.0 0 C o z .oo. o o .V o r C0 CC w0I vr 0

  2. Message-Passing Estimation from Quantized Samples

    CERN Document Server

    Kamilov, Ulugbek; Rangan, Sundeep

    2011-01-01

    Estimation of a vector from quantized linear measurements is a common problem for which simple linear techniques are suboptimal -- sometimes greatly so. This paper develops generalized approximate message passing (GAMP) algorithms for minimum mean-squared error estimation of a random vector from quantized linear measurements, notably allowing the linear expansion to be overcomplete or undercomplete and the scalar quantization to be regular or non-regular. GAMP is a recently-developed class of algorithms that uses Gaussian approximations in belief propagation and allows arbitrary separable input and output channels. Scalar quantization of measurements is incorporated into the output channel formalism, leading to the first tractable and effective method for high-dimensional estimation problems involving non-regular scalar quantization. Non-regular quantization is empirically demonstrated to greatly improve rate--distortion performance in some problems with oversampling or with undersampling combined with a spar...

  3. 34 CFR 300.190 - By-pass-general.

    Science.gov (United States)

    2010-07-01

    ... 34 Education 2 2010-07-01 2010-07-01 false By-pass-general. 300.190 Section 300.190 Education... DISABILITIES State Eligibility By-Pass for Children in Private Schools § 300.190 By-pass—general. (a) If, on... Secretary implements a by-pass. (Authority: 20 U.S.C. 1412(f)(1))...

  4. 75 FR 62690 - Radio Broadcasting Services; Grants Pass, Oregon

    Science.gov (United States)

    2010-10-13

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Grants Pass, Oregon AGENCY: Federal Communications..., allots FM Channel 257A at Grants Pass, Oregon, as the community's second commercial FM transmission service. Channel 257A can be allotted at Grants Pass, consistent with the minimum distance...

  5. A First-Order One-Pass CPS Transformation

    DEFF Research Database (Denmark)

    Danvy, Olivier; Nielsen, Lasse Reichstein

    2001-01-01

    We present a new transformation of λ-terms into continuation-passing style (CPS). This transformation operates in one pass and is both compositional and first-order. Previous CPS transformations only enjoyed two out of the three properties of being first-order, one-pass, and compositional...

  6. 47 CFR 7.9 - Information pass through.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Information pass through. 7.9 Section 7.9... EQUIPMENT BY PEOPLE WITH DISABILITIES Obligations-What Must Covered Entities Do? § 7.9 Information pass through. Telecommunications equipment and customer premises equipment shall pass through...

  7. 47 CFR 6.9 - Information pass through.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Information pass through. 6.9 Section 6.9... Entities Do? § 6.9 Information pass through. Telecommunications equipment and customer premises equipment shall pass through cross-manufacturer, non-proprietary, industry-standard codes, translation...

  8. 75 FR 43897 - FM TABLE OF ALLOTMENTS, GRANTS PASS, OREGON

    Science.gov (United States)

    2010-07-27

    ... COMMISSION 47 CFR Part 73 FM TABLE OF ALLOTMENTS, GRANTS PASS, OREGON AGENCY: Federal Communications... the allotment of FM Channel 257A as the second commercial allotment at Grants Pass, Oregon. The channel can be allotted at Grants Pass in compliance with the Commission's minimum distance...

  9. 78 FR 18479 - Drawbridge Operation Regulations; Pass Manchac, LA

    Science.gov (United States)

    2013-03-27

    ... SECURITY Coast Guard 33 CFR Part 117 Drawbridge Operation Regulations; Pass Manchac, LA AGENCY: Coast Guard... automated bascule span drawbridge across Pass Manchac, mile 6.7, at Manchac, between St. John and Tangipahoa... Pass Manchac, mile 6.7, at Manchac, between St. John and Tangipahoa Parishes, Louisiana. The bridge...

  10. 20 CFR 631.18 - Federal by-pass authority.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Federal by-pass authority. 631.18 Section 631... Procedures § 631.18 Federal by-pass authority. (a) In the event that a State fails to submit a biennial State... Secretary's intent to exercise by-pass authority and an opportunity to request and to receive a...

  11. 48 CFR 652.237-71 - Identification/Building Pass.

    Science.gov (United States)

    2010-10-01

    ... Pass. 652.237-71 Section 652.237-71 Federal Acquisition Regulations System DEPARTMENT OF STATE CLAUSES... Identification/Building Pass. As prescribed in 637.110(b), insert the following clause. Identification/Building Pass (APR 2004) (a) Contractors working in domestic facilities who already possess a security...

  12. A First-Order One-Pass CPS Transformation

    DEFF Research Database (Denmark)

    Danvy, Olivier; Nielsen, Lasse Reichstein

    2002-01-01

    We present a new transformation of call-by-value lambdaterms into continuation-passing style (CPS). This transformation operates in one pass and is both compositional and first-order. Because it operates in one pass, it directly yields compact CPS programs that are comparable to what one would...

  13. A First-Order One-Pass CPS Transformation

    DEFF Research Database (Denmark)

    Danvy, Olivier; Nielsen, Lasse Reichstein

    2003-01-01

    We present a new transformation of λ-terms into continuation-passing style (CPS). This transformation operates in one pass and is both compositional and first-order. Previous CPS transformations only enjoyed two out of the three properties of being first-order, one-pass, and compositional...

  14. Ningwu——An Ancient Pass On The Plateau

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    <正>Ningwu situated on the Loess Plateau in north of Shanxi Province is one of the three passes along the Great Wall. The other two are the Pian Pass in the west and the Yanmen Pass in the east. In the ancient times, it had been a key military town in the northern Chinese borders.

  15. 36 CFR 1193.37 - Information pass through.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 3 2010-07-01 2010-07-01 false Information pass through... § 1193.37 Information pass through. Telecommunications equipment and customer premises equipment shall pass through cross-manufacturer, non-proprietary, industry-standard codes, translation...

  16. Direct detection of mecA, blaSHV , blaCTX-M , blaTEM and blaOXA genes from positive blood culture bottles by multiplex-touchdown PCR assay.

    Science.gov (United States)

    Wang, M-Y; Geng, J-L; Chen, Y-J; Song, Y; Sun, M; Liu, H-Z; Hu, C-J

    2017-02-01

    Methicillin-resistant staphylococci (MRS) and ESBL(Extended-Spectrum β-Lactamase)-producing bacteria are the most important resistant pathogens in sepsis. In this study, a new multiplex-touchdown PCR method (MT-PCR) was developed to detect rapidly and simultaneously the presence of mecA, blaSHV , blaCTX-M , blaTEM and blaOXA genes from positive blood culture bottles. The technique showed a sensitivity of 10(3 ) CFU ml(-1) for mecA detection and of 10(2)  CFU ml(-1) for other genes, and 100% specificity in the detection of all genes. All genes were detected in the spiked blood culture bottles artificially contaminated with reference strains. Three methicillin-resistant S. aureus (MRSA), two methicillin-resistant S. epidermidis (MRSE) and 32 ESBL-producing bacteria, were isolated from the clinical blood culture specimens in 48 h by standard microbiological procedures. The corresponding genes were detected directly in the three MRSA, two MRSE and 29 ESBL-producing bacteria from the clinical blood culture specimens in 4 h by MT-PCR assay. None of the blaSHV , blaCTX-M , blaTEM and blaOXA genes were detected in three other bottles with ESBL-producing bacteria because of other ESBL genotypes in the pathogens. Likewise, all bottles proven negative by culture remained negative by PCR. The proposed method was rapid, sensitive and specific, and was able to directly detect the genes of MRS and ESBL-producing bacteria from the blood culture bottles. Many studies on the development of PCR for the detection of resistance genes have already been published, including multiplex PCR methods. However, cross-amplification reactions can be a major concern in multiplex PCR methods. In this study, we developed a highly sensitive and specific multiplex-touchdown PCR assay for simultaneous detection of mecA, blaSHV , blaCTX-M , blaTEM and blaOXA genes from positive blood culture bottles, cross-amplification was absent and false-positive results were not obtained. © 2016 The

  17. 着陆工况对月球着陆器着陆缓冲性能影响分析%Effects of Touchdown Conditions on the Buffering Performance of the Lunar Lander

    Institute of Scientific and Technical Information of China (English)

    丁建中; 王春洁; 王家俊; 宋顺广

    2016-01-01

    Complex touch-down conditions have significant effects on the performance of the landing gears in energy absorption.A typical four-legged lunar lander was introduced to build the lunar landing dynamics analysis model and a second order response surface model was introduced to con-duct a sensitivity analysis to find out the effects of different landing conditions on the energy-absorp-tion performance.By means of this, high-impact factors such as frictional coefficient, vertical veloc-ity, horizontal velocity along the z axis, equivalent lunar slope angle and rotation angle about the y axis were found.A Monte Carlo simulation was conducted to calculate the landing reliability based on which the reliability analysis with respect to different changeable landing condition values was conducted.It showed that a more smooth footpad and a shorter distant between the lander and the lunar surface could improve the buffering reliability at touchdown.%复杂的着陆工况对月球着陆器缓冲机构的工作可靠度影响很大。基于典型的四腿式月球着陆器建立月面着陆过程动力学仿真模型,构造了二阶响应面等效分析模型进行敏感度分析,分析了着陆工况各组成因子对着陆器缓冲机构缓冲性能的影响,发现对缓冲性能影响显著的工况因子有足垫与月面摩擦系数、竖直速度、沿z轴方向水平速度、等效月面坡度及绕y轴转角。通过蒙特卡洛模拟研究了工况因子取值对缓冲性能的影响,并通过贝叶斯公式计算了可控着陆工况因子不同取值时的缓冲可靠度。研究发现,采用光滑足垫及降低关闭发动机时着陆器距月面的高度可以提高着陆器的着陆缓冲可靠度。

  18. Nanomechanical characterization by double-pass force-distance mapping

    Energy Technology Data Exchange (ETDEWEB)

    Dagdas, Yavuz S; Tekinay, Ayse B; Guler, Mustafa O; Dana, Aykutlu [UNAM Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara (Turkey); Necip Aslan, M, E-mail: aykutlu@unam.bilkent.edu.tr [Department of Physics, Istanbul Technical University, Istanbul (Turkey)

    2011-07-22

    We demonstrate high speed force-distance mapping using a double-pass scheme. The topography is measured in tapping mode in the first pass and this information is used in the second pass to move the tip over the sample. In the second pass, the cantilever dither signal is turned off and the sample is vibrated. Rapid (few kHz frequency) force-distance curves can be recorded with small peak interaction force, and can be processed into an image. Such a double-pass measurement eliminates the need for feedback during force-distance measurements. The method is demonstrated on self-assembled peptidic nanofibers.

  19. Astor Pass Seismic Surveys Preliminary Report

    Energy Technology Data Exchange (ETDEWEB)

    Louie, John [UNR; Pullammanappallil, Satish [Optim; Faulds, James; Eisses, Amy; Kell, Annie; Frary, Roxanna; Kent, Graham

    2011-08-05

    In collaboration with the Pyramid Lake Paiute Tribe (PLPT), the University of Nevada, Reno (UNR) and Optim re-processed, or collected and processed, over 24 miles of 2d seismic-reflection data near the northwest corner of Pyramid Lake, Nevada. The network of 2d land surveys achieved a near-3d density at the Astor Pass geothermal prospect that the PLPT drilled during Nov. 2010 to Feb. 2011. The Bureau of Indian Affairs funded additional seismic work around the Lake, and an extensive, detailed single-channel marine survey producing more than 300 miles of section, imaging more than 120 ft below the Lake bottom. Optim’s land data collection utilized multiple heavy vibrators and recorded over 200 channels live, providing a state-of-the-art reflection-refraction data set. After advanced seismic analysis including first-arrival velocity optimization and prestack depth migration, the 2d sections show clear fault-plane reflections, in some areas as deep as 4000 ft, tying to distinct terminations of the mostly volcanic stratigraphy. Some lines achieved velocity control to 3000 ft depth; all lines show reflections and terminations to 5000 ft depth. Three separate sets of normal faults appear in an initial interpretation of fault reflections and stratigraphic terminations, after loading the data into the OpendTect 3d seismic visualization system. Each preliminary fault set includes a continuous trace more than 3000 ft long, and a swarm of short fault strands. The three preliminary normal-fault sets strike northerly with westward dip, northwesterly with northeast dip, and easterly with north dip. An intersection of all three fault systems documented in the seismic sections at the end of Phase I helped to locate the APS-2 and APS-3 slimholes. The seismic sections do not show the faults connected to the Astor Pass tufa spire, suggesting that we have imaged mostly Tertiary-aged faults. We hypothesize that the Recent, active faults that produced the tufa through hotspring

  20. Multi-Pass Quadrupole Mass Analyzer

    Science.gov (United States)

    Prestage, John D.

    2013-01-01

    Analysis of the composition of planetary atmospheres is one of the most important and fundamental measurements in planetary robotic exploration. Quadrupole mass analyzers (QMAs) are the primary tool used to execute these investigations, but reductions in size of these instruments has sacrificed mass resolving power so that the best present-day QMA devices are still large, expensive, and do not deliver performance of laboratory instruments. An ultra-high-resolution QMA was developed to resolve N2 +/CO+ by trapping ions in a linear trap quadrupole filter. Because N2 and CO are resolved, gas chromatography columns used to separate species before analysis are eliminated, greatly simplifying gas analysis instrumentation. For highest performance, the ion trap mode is used. High-resolution (or narrow-band) mass selection is carried out in the central region, but near the DC electrodes at each end, RF/DC field settings are adjusted to allow broadband ion passage. This is to prevent ion loss during ion reflection at each end. Ions are created inside the trap so that low-energy particles are selected by low-voltage settings on the end electrodes. This is beneficial to good mass resolution since low-energy particles traverse many cycles of the RF filtering fields. Through Monte Carlo simulations, it is shown that ions are reflected at each end many tens of times, each time being sent back through the central section of the quadrupole where ultrahigh mass filtering is carried out. An analyzer was produced with electrical length orders of magnitude longer than its physical length. Since the selector fields are sized as in conventional devices, the loss of sensitivity inherent in miniaturizing quadrupole instruments is avoided. The no-loss, multi-pass QMA architecture will improve mass resolution of planetary QMA instruments while reducing demands on the RF electronics for high-voltage/high-frequency production since ion transit time is no longer limited to a single pass. The

  1. Distributed Programming via Safe Closure Passing

    Directory of Open Access Journals (Sweden)

    Philipp Haller

    2016-02-01

    Full Text Available Programming systems incorporating aspects of functional programming, e.g., higher-order functions, are becoming increasingly popular for large-scale distributed programming. New frameworks such as Apache Spark leverage functional techniques to provide high-level, declarative APIs for in-memory data analytics, often outperforming traditional "big data" frameworks like Hadoop MapReduce. However, widely-used programming models remain rather ad-hoc; aspects such as implementation trade-offs, static typing, and semantics are not yet well-understood. We present a new asynchronous programming model that has at its core several principles facilitating functional processing of distributed data. The emphasis of our model is on simplicity, performance, and expressiveness. The primary means of communication is by passing functions (closures to distributed, immutable data. To ensure safe and efficient distribution of closures, our model leverages both syntactic and type-based restrictions. We report on a prototype implementation in Scala. Finally, we present preliminary experimental results evaluating the performance impact of a static, type-based optimization of serialization.

  2. Tracking particles by passing messages between images

    Energy Technology Data Exchange (ETDEWEB)

    Chertkov, Michael [Los Alamos National Laboratory; Kroc, Lukas [Los Alamos National Laboratory; Zdeborova, Lenka [Los Alamos National Laboratory; Krakala, Florent [ESPCI; Vergassola, M [CNRS

    2009-01-01

    Methods to extract information from the tracking of mobile objects/particles have broad interest in biological and physical sciences. Techniques based on the simple criterion of proximity in time-consecutive snapshots are useful to identify the trajectories of the particles. However, they become problematic as the motility and/or the density of the particles increases because of the uncertainties on the trajectories that particles have followed during the acquisition time of the images. Here, we report efficient methods for learning parameters of the dynamics of the particles from their positions in time-consecutive images. Our algorithm belongs to the class of message-passing algorithms, also known in computer science, information theory and statistical physics under the name of Belief Propagation (BP). The algorithm is distributed, thus allowing parallel implementation suitable for computations on multiple machines without significant inter-machine overhead. We test our method on the model example of particle tracking in turbulent flows, which is particularly challenging due to the strong transport that those flows produce. Our numerical experiments show that the BP algorithm compares in quality with exact Markov Chain Monte-Carlo algorithms, yet BP is far superior in speed. We also suggest and analyze a random-distance model that provides theoretical justification for BP accuracy. Methods developed here systematically formulate the problem of particle tracking and provide fast and reliable tools for its extensive range of applications.

  3. Airborne Radar Interferometric Repeat-Pass Processing

    Science.gov (United States)

    Hensley, Scott; Michel, Thierry R.; Jones, Cathleen E.; Muellerschoen, Ronald J.; Chapman, Bruce D.; Fore, Alexander; Simard, Marc; Zebker, Howard A.

    2011-01-01

    Earth science research often requires crustal deformation measurements at a variety of time scales, from seconds to decades. Although satellites have been used for repeat-track interferometric (RTI) synthetic-aperture-radar (SAR) mapping for close to 20 years, RTI is much more difficult to implement from an airborne platform owing to the irregular trajectory of the aircraft compared with microwave imaging radar wavelengths. Two basic requirements for robust airborne repeat-pass radar interferometry include the ability to fly the platform to a desired trajectory within a narrow tube and the ability to have the radar beam pointed in a desired direction to a fraction of a beam width. Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) is equipped with a precision auto pilot developed by NASA Dryden that allows the platform, a Gulfstream III, to nominally fly within a 5 m diameter tube and with an electronically scanned antenna to position the radar beam to a fraction of a beam width based on INU (inertial navigation unit) attitude angle measurements.

  4. Single Pass Multi-component Harvester

    Energy Technology Data Exchange (ETDEWEB)

    Reed Hoskinson; J. Richard Hess

    2004-08-01

    Abstract. In order to meet the U. S. government’s goal of supplementing the energy available from petroleum by increasing the production of energy from renewable resources, increased production of bioenergy has become one of the new goals of the United States government and our society. U.S. Executive Orders and new Federal Legislation have mandated changes in government procedures and caused reorganizations within the government to support these goals. The Biomass Research and Development Initiative is a multi-agency effort to coordinate and accelerate all U.S. Federal biobased products and bioenergy research and development. The Initiative is managed by the National Biomass Coordination Office, which is staffed by both the DOE and the USDA. One of the most readily available sources of biomass from which to produce bioenergy is an agricultural crop residue, of which straw from small grains is the most feasible residue with which to start. For the straw residue to be used its collection must be energy efficient and its removal must not impact the sustainability of the growing environment. In addition, its collection must be economically advantageous to the producer. To do all that, a single pass multi-component harvester system is most desirable. Results from our first prototype suggest that current combines probably do adequate threshing and that a separate chassis can be developed that does additional separation and that is economically feasible.

  5. Tracking particles by passing messages between images

    Energy Technology Data Exchange (ETDEWEB)

    Chertkov, Michael [Los Alamos National Laboratory; Kroc, Lukas [Los Alamos National Laboratory; Zdeborova, Lenka [Los Alamos National Laboratory; Krakala, Florent [ESPCI; Vergassola, M [CNRS

    2009-01-01

    Methods to extract information from the tracking of mobile objects/particles have broad interest in biological and physical sciences. Techniques based on the simple criterion of proximity in time-consecutive snapshots are useful to identify the trajectories of the particles. However, they become problematic as the motility and/or the density of the particles increases because of the uncertainties on the trajectories that particles have followed during the acquisition time of the images. Here, we report efficient methods for learning parameters of the dynamics of the particles from their positions in time-consecutive images. Our algorithm belongs to the class of message-passing algorithms, also known in computer science, information theory and statistical physics under the name of Belief Propagation (BP). The algorithm is distributed, thus allowing parallel implementation suitable for computations on multiple machines without significant inter-machine overhead. We test our method on the model example of particle tracking in turbulent flows, which is particularly challenging due to the strong transport that those flows produce. Our numerical experiments show that the BP algorithm compares in quality with exact Markov Chain Monte-Carlo algorithms, yet BP is far superior in speed. We also suggest and analyze a random-distance model that provides theoretical justification for BP accuracy. Methods developed here systematically formulate the problem of particle tracking and provide fast and reliable tools for its extensive range of applications.

  6. How My Program Passed the Turing Test

    Science.gov (United States)

    Humphrys, Mark

    In 1989, the author put an ELIZA-like chatbot on the Internet. The conversations this program had can be seen - depending on how one defines the rules (and how seriously one takes the idea of the test itself) - as a passing of the Turing Test. This is the first time this event has been properly written. This chatbot succeeded due to profanity, relentless aggression, prurient queries about the user, and implying that they were a liar when they responded. The element of surprise was also crucial. Most chatbots exist in an environment where people expectto find some bots among the humans. Not this one. What was also novel was the onlineelement. This was certainly one of the first AI programs online. It seems to have been the first (a) AI real-time chat program, which (b) had the element of surprise, and (c) was on the Internet. We conclude with some speculation that the future of all of AI is on the Internet, and a description of the "World- Wide-Mind" project that aims to bring this about.

  7. The Effectiveness of Heat Exchangers with One Shell Pass and Three Tube Passes.

    Science.gov (United States)

    1985-06-01

    Yorf, NY, 1973. 14. Chapra , S. C. and Canale, R. P., Numerical Methods for Engineers with Personal Computer Applications, "Mcraw-Hill Book Company, New...Effectiveness Ntu Method Three Tube Passes 20. ABSTRACT eConrnue an rere aid4eIf nocesey and Identify by block m bi6e r .Heat exchangers with one shell...THE DEVELOPMENT OF THE EFFECTIVENESS METHOD . . .. 20 A. LITERATURE SURVEY . . . . . . .......... 20 B. FISCHER’S WORK . . . . . . . . ......... 23

  8. Single pass kernel -means clustering method

    Indian Academy of Sciences (India)

    T Hitendra Sarma; P Viswanath; B Eswara Reddy

    2013-06-01

    In unsupervised classification, kernel -means clustering method has been shown to perform better than conventional -means clustering method in identifying non-isotropic clusters in a data set. The space and time requirements of this method are $O(n^2)$, where is the data set size. Because of this quadratic time complexity, the kernel -means method is not applicable to work with large data sets. The paper proposes a simple and faster version of the kernel -means clustering method, called single pass kernel k-means clustering method. The proposed method works as follows. First, a random sample $\\mathcal{S}$ is selected from the data set $\\mathcal{D}$. A partition $\\Pi_{\\mathcal{S}}$ is obtained by applying the conventional kernel -means method on the random sample $\\mathcal{S}$. The novelty of the paper is, for each cluster in $\\Pi_{\\mathcal{S}}$, the exact cluster center in the input space is obtained using the gradient descent approach. Finally, each unsampled pattern is assigned to its closest exact cluster center to get a partition of the entire data set. The proposed method needs to scan the data set only once and it is much faster than the conventional kernel -means method. The time complexity of this method is $O(s^2+t+nk)$ where is the size of the random sample $\\mathcal{S}$, is the number of clusters required, and is the time taken by the gradient descent method (to find exact cluster centers). The space complexity of the method is $O(s^2)$. The proposed method can be easily implemented and is suitable for large data sets, like those in data mining applications. Experimental results show that, with a small loss of quality, the proposed method can significantly reduce the time taken than the conventional kernel -means clustering method. The proposed method is also compared with other recent similar methods.

  9. Distribution of Longitudinal Inherent Strains in Multiple-passes Welding

    Institute of Scientific and Technical Information of China (English)

    Peng HE; Jiuhai ZHANG; Toshio Terasaki; Testuya Akiyama

    2001-01-01

    A fundamental theory for the analysis of residual welding stresses and deformation based on the inherent strain distribution along the welded joint is introduced. The computing method of distribution of longitudinal inherent strains in multiple-passes welding in heavy plate weldment is proposed. Distribution of longitudinal inherent strains in one-pass welding and two-passes welding are compared and analyzed. The effect of cutting on inherent strain is discussed.

  10. Calculation of trajectory parameters of long pass in basketball.

    Directory of Open Access Journals (Sweden)

    Charikova K.M.

    2011-08-01

    Full Text Available Values of a ball's flight trajectory parameters depending on a distance of long pass, a corner of a ball's start and height of a throwing point are submitted in article. Coordinates of reference points installation for training to long pass with an optimum trajectory of a ball's flight are designed. Requirements to simulators design are determined. Corners of ball's long pass performance in various game situations are recommended.

  11. The Single Pass Multi-component Harvester

    Energy Technology Data Exchange (ETDEWEB)

    Reed Hoskinson; John R. Hess

    2004-08-01

    collection must be economically advantageous to the producer. To do all that, a single pass multi-component harvester system is most desirable. Results from our first prototype suggest that current combines probably do adequate threshing and that a separate chassis can be developed that does additional separation and that is economically feasible.

  12. Chelyabinsk fireball and Dyatlov pass tragedy

    Science.gov (United States)

    Kochemasov, G. G.

    2013-09-01

    The Chelyabinsk bolide as well as the Kunashak meteorite in 1949 (Fig. 3, black square) hit ground in ectonically peculiar place in the Ural Mountains. The main explosion was followed by a series of weaker bangs. The long Uralian fold belt (Pz) separates two subsectors (1 & 2, Fig. 1) of the Eurasian sector (1+2) of the Eastern hemisphere sectoral structure (Fig. 1). At the Pamirs-Hindukush massif (the "Pamirs' cross") meet four tectonic sectors of this structure: two opposite differently uplifted (Africa-Mediterranean ++ and Asian +) and separating them two opposite differently subsided (Eurasian - and Indooceanic - -). Tectonic bisectors divide the sectors into two differently tectonically elevated subsectors. The Ural Mountains is one of these bisectors dividing the somewhat risen East-European subsector and the relatively fallen West-Siberian one. Even more important is the sharp tectonic boundary between subsided Eurasian sector and uplifted Asian one (between 2 and 3, Fig. 1). Fig. 3 shows distribution of electrophonic bolides over USSR [1]. Observations numbers are in circles. The total of 343 observations is distributed at relevant districts; accompanied meteorites were found only in 23-24 cases; in the chart are excluded background values of 1-2 observations per district. Two areas are obviously anomalous. These of the Urals, and the Eurasia-Asia sectoral contact (Novosibirsk - Yenisei R. - Tunguska). A location in the long Uralian belt is determined by its intersection with the Timan fold belt coming from the northwest (Fig. 3). The catastrophic Dyatlov pass where nine people mysteriously died at once occurs there (triangle in Fig. 3). Mancy aborigines know this place as deadly where killing white shining spheres appear. Moreover this belt intersection is well known among hunters for UFO as the Permian triangle (Fig. 2). They meet there to observe unusual atmospheric shining and other anomalous phenomena. In the Yenisei-Tunguska-Baikal region lightning

  13. The design of thin disk laser multi-pass amplifier

    Science.gov (United States)

    Song, Enmao; Zhu, Guangzhi; Zhu, Xiao; Yu, Jinbo; Zhao, Wenguang

    2016-11-01

    In this paper, a thin disk multi-pass amplification system is designed based on the conjugated double parabolic mirror pumping thin disk laser module, which realizes 20 passes transmitting through the thin disk crystal. The light transmission matrix is used to optimize optical mode matching of seed laser spot size and pumping spot size during the multi-pass transmission. At the same time, anti-misalignment stability of the thin disk multi-pass amplification system and the aberration of output laser beam are analyzed in deeply.

  14. Railroad Pass Evaluation Nevada-Utah Siting Area.

    Science.gov (United States)

    1979-11-16

    Pass, Snake & Spring. NV. Curves Mining Claims Moderate Numero GOLDFIELD HILLS Gradual Mines Low to 3 (b) 8 5600 N-S Curves at Moderate Numeroo Big... Numero Milford & Wah Wah. UT. Curves HALFWAY SUMMIT One or Two 8 (a) 2 6250 NE-SW Sharp At Pass, Roae Moderate Severs Pine & Snake. UT. Curves HANCOCK...At Pass, Road Moderate Numero Stone Cabin & Ralston. NV. Curves MELOY SUMMIT One or Lak & M IT 4 (a) 6 6800 E-W Two Sharp At Pass Moderate Numeroe

  15. Second Order Low-Pass and High-Pass Filter Designs Using Method of Synthetic Immitance Elements

    Directory of Open Access Journals (Sweden)

    Pavel Brandstetter

    2013-01-01

    Full Text Available The paper briefly describes the basics of frequency filter design method using synthetic immittance elements with current conveyors. An introduction of the paper explains the advantages and also disadvantages of using this method. Other chapters briefly introduce a design process of simple second order low-pass and high-pass filter. A theory of current conveyors is discussed too, because they are the basic building blocs of proposed synthetic element and also active frequency filters. Finally, the particular solutions of low-pass and high-pass filters are given and verified by OrCAD PSpice simulations.

  16. Safety analysis of passing maneuvers using extreme value theory

    Directory of Open Access Journals (Sweden)

    Haneen Farah

    2017-04-01

    The results indicate that this is a promising approach for safety evaluation. On-going work of the authors will attempt to generalize this method to other safety measures related to passing maneuvers, test it for the detailed analysis of the effect of demographic factors on passing maneuvers' crash probability and for its usefulness in a traffic simulation environment.

  17. 33 CFR 117.436 - Chef Menteur Pass.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Chef Menteur Pass. 117.436 Section 117.436 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Louisiana § 117.436 Chef Menteur Pass. The draw of...

  18. 20 CFR 631.38 - State by-pass authority.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false State by-pass authority. 631.38 Section 631.38 Employees' Benefits EMPLOYMENT AND TRAINING ADMINISTRATION, DEPARTMENT OF LABOR PROGRAMS UNDER TITLE III OF THE JOB TRAINING PARTNERSHIP ACT State Administration § 631.38 State by-pass authority....

  19. 33 CFR 117.267 - Big Carlos Pass.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Big Carlos Pass. 117.267 Section 117.267 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Florida § 117.267 Big Carlos Pass. The draw of...

  20. 24 CFR 3286.509 - Reinspection upon failure to pass.

    Science.gov (United States)

    2010-04-01

    ... 24 Housing and Urban Development 5 2010-04-01 2010-04-01 false Reinspection upon failure to pass. 3286.509 Section 3286.509 Housing and Urban Development Regulations Relating to Housing and Urban...-Administered States § 3286.509 Reinspection upon failure to pass. (a) Procedures for failed inspection. If...

  1. 33 CFR 117.499 - Tante Phine Pass.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Tante Phine Pass. 117.499 Section 117.499 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Louisiana § 117.499 Tante Phine Pass. The draw of...

  2. Value passing for Communicating Piecewise Deterministic Markov Processes

    NARCIS (Netherlands)

    Strubbe, Stefan; Schaft, Arjan van der; Julius, Agung

    2006-01-01

    In this paper we extend the CPDP model, which is used for compositional specification of PDP-type stochastic hybrid systems, to the value passing CPDP model. With value passing we can express communication of values of continuous variables between CPDP components. We show that the class of value pas

  3. Variation of rolling noise during train pass-bys

    NARCIS (Netherlands)

    Dittrich, M.G.

    2013-01-01

    Railway pass-by noise measurements on different types of tracks sometimes display a significant difference between the rise and decrease in rolling noise at the front and the back of the train. This can potentially have different causes. Whilst this may not necessarily be relevant for the total pass

  4. Teaching Strategies for the Forearm Pass in Volleyball

    Science.gov (United States)

    Casebolt, Kevin; Zhang, Peng; Brett, Christine

    2014-01-01

    This article shares teaching strategies for the forearm pass in the game of volleyball and identifies how they will help students improve their performance and development of forearm passing skills. The article also provides an assessment rubric to facilitate student understanding of the skill.

  5. Logical Consequences: Using Passing Times to Prevent Misbehavior

    Science.gov (United States)

    Harriman, Dion; Pierre, Christina

    2009-01-01

    This article discusses the No Passing Plan, a no-passing policy implemented at White Bear Lake (MN) High School-North Campus in order to prevent chronic tardiness and misbehavior in the halls. The plan is an alternative consequence for administrators to use with students who are disruptive in the halls or consistently tardy to class. Suspending…

  6. Teaching Strategies for the Forearm Pass in Volleyball

    Science.gov (United States)

    Casebolt, Kevin; Zhang, Peng; Brett, Christine

    2014-01-01

    This article shares teaching strategies for the forearm pass in the game of volleyball and identifies how they will help students improve their performance and development of forearm passing skills. The article also provides an assessment rubric to facilitate student understanding of the skill.

  7. Clinton and the Process to Pass NAFTA: Making Sausage

    Science.gov (United States)

    2002-01-01

    NATIONAL DEFENSE UNIVERSITY NATIONAL WAR COLLEGE CLINTON AND THE PROCESS TO PASS NAFTA : MAKING SAUSAGE LtCol CHRIS D. McMENOMY, USMC...00-00-2002 to 00-00-2002 4. TITLE AND SUBTITLE Clinton and the Process to Pass NAFTA : Making Sausage 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c...PAGE unclassified Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std Z39-18 CLINTON AND THE PROCESS TO PASS NAFTA : MAKING SAUSAGE President

  8. An Electrostatically Actuated MEMS Arch Band-Pass Filter

    Directory of Open Access Journals (Sweden)

    Hassen M. Ouakad

    2013-01-01

    Full Text Available This work presents an investigation of the dynamics of micromachined arches resonators and their potential to be utilized as band-pass filters. The arches are actuated by a DC electrostatic load superimposed to an AC harmonic load. The dynamic response of the arch is studied analytically using a Galerkin-based reduced-order model when excited near its fundamental and third natural frequencies. Several simulation results are presented demonstrating interesting jumps and snap-through behavior of the arches and their attractive features for uses as band-pass filters, such as their sharp roll-off from pass bands to stop bands and their flat response.

  9. Colour atlas of first pass functional imaging of the heart

    Energy Technology Data Exchange (ETDEWEB)

    Schad, N.; Andrews, E.J.; Fleming, J.W.

    1985-01-01

    This book contains 21 chapters. Some of the titles are: Functional imaging; Fist pass radionuclide studies in evaluation of mitral valve replacement in chronic insufficiency using Bjork-Shiley tilting disc valves; First pass radionuclide studies in evaluation of left and right ventricular function in patients with bioprosthetic mitral valve replacement after 9-11 years; and First pass radionuclide studies in the evaluation of long term (up to about 15 years) follow up of aortic valve replacement using Starr-Edwards ball prosthesis.

  10. On the expressiveness of single-pass instruction sequences

    CERN Document Server

    Bergstra, J A

    2008-01-01

    We perceive programs as single-pass instruction sequences. A single-pass instruction sequence under execution is considered to produce a behaviour to be controlled by some execution environment. Threads as considered in basic thread algebra model such behaviours. We show that all regular threads, i.e. threads that can only be in a finite number of states, can be produced by single-pass instruction sequences without jump instructions if use can be made of Boolean registers. We also show that, in the case where goto instructions are used instead of jump instructions, a bound to the number of labels restricts the expressiveness.

  11. Does the endolymph pass through the base of the cupula?

    Science.gov (United States)

    Jijiwa, H.; Watanabe, N.; Hattori, T.; Matuda, F.; Hashiba, M.; Mizuno, Y.; Shindo, M.; Watanabe, S.

    2001-08-01

    Whether the endolymph of the semicircular canal passes the cupular partition or not was examined using the lateral semicircular canal system of adult pigeons (Columba livia). By applying various pressures by means of injection of a dye solution through the membranous canal, it was found that the dye solution was seen to pass the cupula even under very low pressures when the pressure was increased gradually. When pulled by a magnet, the ultrafine particles of the dextran magnetite contained in the injected fluid were found to pass through the subcupular space without evident increase of the ampullary pressure.

  12. Does the endolymph pass through the base of the cupula?

    Science.gov (United States)

    Jijiwa, H; Watanabe, N; Hattori, T; Matuda, F; Hashiba, M; Mizuno, Y; Shindo, M; Watanabe, S

    2001-01-01

    Whether the endolymph of the semicircular canal passes the cupular partition or not was examined using the lateral semicircular canal system of adult pigeons (Columba livia). By applying various pressures by means of injection of a dye solution through the membranous canal, it was found that the dye solution, was seen to pass the cupula even under very low pressures when the pressure was increased gradually. When pulled by a magnet, the ultrafine particles of the dextran magnetite contained in the injected fluid were found to pass through the subcupular space without evident increase of the ampullary pressure.

  13. Interest rate pass-through in the Dominican Republic

    National Research Council Canada - National Science Library

    Grigoli, Francesco; Mota, José M

    2017-01-01

    ... rates, to eventually influence aggregate demand and inflation. This paper estimates the interest rate pass-through of the monetary policy rate to retail rates and explores asymmetries in the adjustment...

  14. Number of Migration Scenarios Passing through each HUC

    Data.gov (United States)

    U.S. Environmental Protection Agency — Forest dwelling neotropical migratory birds require intact forested stopovers during migration. The number of paths that pass through a HUC highlight that huc's...

  15. Band pass filters. Citations from the NTIS data base

    Science.gov (United States)

    Reed, W. E.

    1980-04-01

    A bibliography containing 242 abstracts addressing the design, fabrication, characterization, and application of band pass filters is presented. Radiofrequency, digital, acoustic surface wave, and X-ray filters are included.

  16. NMFS Prioritization, Allocation & Scheduling System (NMFS Asset PASS)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NMFS Asset PASS is a web-based enterprise application and ORACLE database that collects research platform requests. The first release initially focused on line...

  17. Chaotic jam and phase transition in traffic flow with passing.

    Science.gov (United States)

    Nagatani, T

    1999-08-01

    The lattice hydrodynamic model is presented to take into account the passing effect in one-dimensional traffic flow. When the passing constant gamma is small, the conventional jamming transition occurs between the uniform traffic and kink density wave flows. When passing constant gamma is larger than the critical value, the jamming transitions occur from the uniform traffic flow, through the chaotic density wave flow, to the kink density wave flow, with an increasing delay time. The chaotic region increases with passing constant gamma. The neutral stability line is derived from the linear stability analysis. The neutral stability line coincides with the transition line between the uniform traffic and density wave flows. The modified Korteweg-de Vries equation describing the kink jam is derived for small values of gamma by use of a nonlinear analysis.

  18. Number of Migration Scenarios Passing through each HUC (future)

    Data.gov (United States)

    U.S. Environmental Protection Agency — Forest dwelling neotropical migratory birds require intact forested stopovers during migration. The number of paths that pass through a HUC highlight that huc's...

  19. Direct Deposit -- When Message Passing Meets Shared Memory

    Science.gov (United States)

    2000-05-19

    by H. Karl in [64]. The paper implements the pure DSM code, the pure message passing code and a few intermediate forms on the Charlotte DSM system [8...ASPLOS VI), pages 51–60, San Jose, October 1994. ACM. [64] H. Karl . Bridging the gap between distributed shared memory and message passing. Concurrency...pages 94 – 101, 1988. [73] P.N. Loewenstein and D.L. Dill. Verification of a multiprocessor cache protocol using simulation relations and higher-order

  20. Data Handover: Reconciling Message Passing and Shared Memory

    OpenAIRE

    Gustedt, Jens

    2004-01-01

    Data Handover (DHO) is a programming paradigm and interface that aims to handle data between parallel or distributed processes that mixes aspects of message passing and shared memory. It is designed to overcome the potential problems in terms of efficiency of both: (1) memory blowup and forced copies for message passing and (2) data consistency and latency problems for shared memory. Our approach attempts to be simple and easy to understand. It content...

  1. River Dart Weir and fish pass survey 1992

    OpenAIRE

    Maslin, M

    1992-01-01

    This is the River Dart, Weir and Fish Pass Survey 1992 report produced by the National Rivers Authority. It goes through the general condition of Weirs and fish passes to determine the extent of problems associated with the upstream and downstream migration of salmonids. It considers solutions where problems exist and investigates the exact use of the resource. It looks at the following Weirs: Totnes, Staverton, Hood, Kilbury, Buckfast, Holne, Mardle (River Mardle), Holybrook (Holybrook), ...

  2. Terrorismihirm sunnib muretsema kalleid mikrokiibiga passe / Andrus Karnau

    Index Scriptorium Estoniae

    Karnau, Andrus

    2005-01-01

    Alates 1. septembrist 2006 peavad kõik EL-i liikmesriigid hakkama väljastama mikrokiibiga varustatud passe, mille hinnaks võib kujuneda kuni 1000 krooni ja kehtivus lüheneb viiele aastale. Mikrokiip sisaldab inimese biomeetrilisi andmeid - esialgu vaid näokujutist, alates 2008. aastast näpujälgi ning hiljem ka andmeid silmaiirise ja juuksevärvi kohta. Lisa: Biomeetriline pass peidab intiimseid isikuandmeid. Kommenteerib Kohtuekspertiisi ja Kriminalistika Keskuse infojuht Aivar Pau

  3. Gestalt-like representations hijack Chunk-and-Pass processing.

    Science.gov (United States)

    Dumitru, Magda L

    2016-01-01

    Christiansen & Chater (C&C) make two related and somewhat contradictory claims, namely that the ever abstract language representations built during Chunk-and-Pass processing allow for ever greater interference from extra-linguistic information, and that it is nevertheless the language system that re-codes incoming information into abstract representations. I analyse these claims and discuss evidence suggesting that Gestalt-like representations hijack Chunk-and-Pass processing.

  4. 2006 United States Army Corps of Engineers (USACE) Post Hurricane Wilma Lidar: Hurricane Pass to Big Hickory Pass, FL

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The data contained in these files contain hydrographic and topographic data collected by the CHARTS system along the west coast of Florida from Hurricane Pass to Big...

  5. Error Comparison and Analysis of the Two-pass and Three-pass Approaches in Airborne D-InSAR

    OpenAIRE

    Li Yan-lei; Liang Xing-dong; Ding Chi-biao

    2013-01-01

    Airborne differential synthetic aperture radar interferometry (D-InSAR) is a kind of potential technology to survey the surface deformation. In this paper, the errors of two usually used modes of this technology, namely, two-pass and three-pass approaches, are compared and analyzed. In the analysis, all the errors are decomposed and sorted according to the principle of independence, and the coupling between motion error and other errors is considered. Based on the analysis, analytical express...

  6. Error Comparison and Analysis of the Two-pass and Three-pass Approaches in Airborne D-InSAR

    Directory of Open Access Journals (Sweden)

    Li Yan-lei

    2013-09-01

    Full Text Available Airborne differential synthetic aperture radar interferometry (D-InSAR is a kind of potential technology to survey the surface deformation. In this paper, the errors of two usually used modes of this technology, namely, two-pass and three-pass approaches, are compared and analyzed. In the analysis, all the errors are decomposed and sorted according to the principle of independence, and the coupling between motion error and other errors is considered. Based on the analysis, analytical expressions are derived for the deformation measurement errors in the two modes. The results demonstrate that when the amplitude of the motion error is small, the three-pass approach can reduce the requirement on the precision of the external topography data, so it distinctly outperforms the two-pass approach; when the amplitude of the motion error is large, high-precision topography data are needed in the three-pass approach, and as a result, its advantage over the two-pass approach is not distinct any more.

  7. 77 FR 31725 - Safety Zone; Belle Pass Dredge Operations, Belle Pass, Mile Marker 1.0 to Mile Marker (−0.2...

    Science.gov (United States)

    2012-05-30

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Belle Pass Dredge Operations, Belle Pass... operations in specified waters of Belle Pass, Port Fourchon, Louisiana. This action is necessary for the... pipelines along the Gulf Shoreline of Belle Pass. In addition to the dredging equipment described...

  8. A prototype for the PASS Permanent All Sky Survey

    Science.gov (United States)

    Deeg, H. J.; Alonso, R.; Belmonte, J. A.; Horne, K.; Alsubai, K.; Collier Cameron, A.; Doyle, L. R.

    2004-10-01

    A prototype system for the Permanent All Sky Survey (PASS) project is presented. PASS is a continuous photometric survey of the entire celestial sphere with a high temporal resolution. Its major objectives are the detection of all giant-planet transits (with periods up to some weeks) across stars up to mag 10.5, and to deliver continuously photometry that is useful for the study of any variable stars. The prototype is based on CCD cameras with short focal length optics on a fixed mount. A small dome to house it at Teide Observatory, Tenerife, is currently being constructed. A placement at the antarctic Dome C is also being considered. The prototype will be used for a feasibility study of PASS, to define the best observing strategies, and to perform a detailed characterization of the capabilities and scope of the survey. Afterwards, a first partial sky surveying will be started with it. That first survey may be able to detect transiting planets during its first few hundred hours of operation. It will also deliver a data set around which software modules dealing with the various scientific objectives of PASS will be developed. The PASS project is still in its early phase and teams interested in specific scientific objectives, in providing technical expertise, or in participating with own observations are invited to collaborate.

  9. Validation of the G-PASS code : status report.

    Energy Technology Data Exchange (ETDEWEB)

    Vilim, R. B.; Nuclear Engineering Division

    2009-03-12

    Validation is the process of determining whether the models in a computer code can describe the important phenomena in applications of interest. This report describes past work and proposed future work for validating the Gas Plant Analyzer and System Simulator (G-PASS) code. The G-PASS code was developed for simulating gas reactor and chemical plant system behavior during operational transients and upset events. Results are presented comparing code properties, individual component models, and integrated system behavior against results from four other computer codes. Also identified are two experiment facilities nearing completion that will provide additional data for individual component and integrated system model validation. The main goal of the validation exercise is to ready a version of G-PASS for use as a tool in evaluating vendor designs and providing guidance to vendors on design directions in nuclear-hydrogen applications.

  10. Efficiently passing messages in distributed spiking neural network simulation.

    Science.gov (United States)

    Thibeault, Corey M; Minkovich, Kirill; O'Brien, Michael J; Harris, Frederick C; Srinivasa, Narayan

    2013-01-01

    Efficiently passing spiking messages in a neural model is an important aspect of high-performance simulation. As the scale of networks has increased so has the size of the computing systems required to simulate them. In addition, the information exchange of these resources has become more of an impediment to performance. In this paper we explore spike message passing using different mechanisms provided by the Message Passing Interface (MPI). A specific implementation, MVAPICH, designed for high-performance clusters with Infiniband hardware is employed. The focus is on providing information about these mechanisms for users of commodity high-performance spiking simulators. In addition, a novel hybrid method for spike exchange was implemented and benchmarked.

  11. Stable ring resonator with bidirectional passes through the gain medium

    Science.gov (United States)

    Paxton, Alan H.; Miller, Harold C.

    2014-03-01

    Ring resonators have unique properties that are sometimes desirable. Spatial hole burning is eliminated. Beam transformation, such as image rotation which may reduce the magnitude of certain aberrations, can be implemented in a traveling-wave region. There is a drawback, however. As usually constructed, a ring resonator has half as many passes through the gain medium as can be achieved with a standing-wave resonator. This may have a detrimental effect on laser efficiency. We have constructed a type of ring resonator that allows counterpropagating collinear passes through the gain medium, while there is also a section with a unidirectional beam. The resonator includes a polarizing beam splitter. The linear polarization is transformed to the orthogonal state by optical elements at the two ends of the region with counter-propagating beams. The beams passing through the gain medium in opposite directions are linearly polarized with orthogonal states.

  12. A First-Order One-Pass CPS Transformation

    DEFF Research Database (Denmark)

    Danvy, Olivier; Nielsen, Lasse Reichstein

    2002-01-01

    We present a new transformation of call-by-value lambdaterms into continuation-passing style (CPS). This transformation operates in one pass and is both compositional and first-order. Because it operates in one pass, it directly yields compact CPS programs that are comparable to what one would...... write by hand. Because it is compositional, it allows proofs by structural induction. Because it is first-order, reasoning about it does not require the use of a logical relation. This new CPS transformation connects two separate lines of research. It has already been used to state a new and simpler...... correctness proof of a direct-style transformation, and to develop a new and simpler CPS transformation of control-flow information....

  13. A First-Order One-Pass CPS Transformation

    DEFF Research Database (Denmark)

    Danvy, Olivier; Nielsen, Lasse Reichstein

    2001-01-01

    We present a new transformation of λ-terms into continuation-passing style (CPS). This transformation operates in one pass and is both compositional and first-order. Previous CPS transformations only enjoyed two out of the three properties of being first-order, one-pass, and compositional......, but the new transformation enjoys all three properties. It is proved correct directly by structural induction over source terms instead of indirectly with a colon translation, as in Plotkin's original proof. Similarly, it makes it possible to reason about CPS-transformed terms by structural induction over...... source terms, directly.The new CPS transformation connects separately published approaches to the CPS transformation. It has already been used to state a new and simpler correctness proof of a direct-style transformation, and to develop a new and simpler CPS transformation of control-flow information....

  14. A First-Order One-Pass CPS Transformation

    DEFF Research Database (Denmark)

    Danvy, Olivier; Nielsen, Lasse Reichstein

    2003-01-01

    We present a new transformation of λ-terms into continuation-passing style (CPS). This transformation operates in one pass and is both compositional and first-order. Previous CPS transformations only enjoyed two out of the three properties of being first-order, one-pass, and compositional......, but the new transformation enjoys all three properties. It is proved correct directly by structural induction over source terms instead of indirectly with a colon translation, as in Plotkin's original proof. Similarly, it makes it possible to reason about CPS-transformed terms by structural induction over...... source terms, directly.The new CPS transformation connects separately published approaches to the CPS transformation. It has already been used to state a new and simpler correctness proof of a direct-style transformation, and to develop a new and simpler CPS transformation of control-flow information....

  15. Efficiently passing messages in distributed spiking neural network simulation

    Directory of Open Access Journals (Sweden)

    Corey Michael Thibeault

    2013-06-01

    Full Text Available Efficiently passing spiking messages in a neural model is an important aspect of high-performance simulation. As the scale of networks has increased so has the size of the computing systems required to simulate them. In addition, the information exchange of these resources has become more of an impediment to performance. In this paper we explore spike message passing using different mechanisms provided by the Message Passing Interface (MPI. A specific implementation, MVAPICH, designed for high-performance clusters with Infiniband hardware is employed. The focus is on providing information about these mechanisms for users of commodity high-performance spiking simulators. In addition, a novel hybrid-method for spike exchange was implemented and benchmarked.

  16. Future-based Static Analysis of Message Passing Programs

    Directory of Open Access Journals (Sweden)

    Wytse Oortwijn

    2016-06-01

    Full Text Available Message passing is widely used in industry to develop programs consisting of several distributed communicating components. Developing functionally correct message passing software is very challenging due to the concurrent nature of message exchanges. Nonetheless, many safety-critical applications rely on the message passing paradigm, including air traffic control systems and emergency services, which makes proving their correctness crucial. We focus on the modular verification of MPI programs by statically verifying concrete Java code. We use separation logic to reason about local correctness and define abstractions of the communication protocol in the process algebra used by mCRL2. We call these abstractions futures as they predict how components will interact during program execution. We establish a provable link between futures and program code and analyse the abstract futures via model checking to prove global correctness. Finally, we verify a leader election protocol to demonstrate our approach.

  17. Does Inflation Targeting Reduce Pass-Through Effect?

    Directory of Open Access Journals (Sweden)

    Murat Karagoz

    2012-10-01

    Full Text Available There is a common academic opinion that the dollarization caused by the increasing inflation rates, particularly in the emerging market economies since 1990s also increases the pass-through effects in such countries. Yet another opinion suggests that the decrease in the inflation rates thanks to inflation targeting causes a reversal in the dollarization and a decrease in the pass-through effect. The aim of this study is to evaluate both opinions for the selected emerging market economies. Six different emerging market economies have been tested via Panel VAR approach. The findings of the study seem to support the latter.

  18. Does Inflation Targeting Reduce Pass-Through Effect?

    Directory of Open Access Journals (Sweden)

    Murat Karagoz

    2016-02-01

    Full Text Available There is a common academic opinion that the dollarization caused by the increasing inflation rates, particularly in the emerging market economies since 1990s also increases the pass-through effects in such countries. Yet another opinion suggests that the decrease in the inflation rates thanks to inflation targeting causes a reversal in the dollarization and a decrease in the pass-through effect. The aim of this study is to evaluate both opinions for the selected emerging market economies. Six different emerging market economies have been tested via Panel VAR approach. The findings of the study seem to support the latter.

  19. Message-Passing Interface - Selected Topics and Best Practices

    OpenAIRE

    Janetzko, Florian

    2013-01-01

    The Message-Passing Interface (MPI) is a widely-used standard library for programming parallel applications using the distributed-memory model. In the first part of this talk we will give a short overview over concepts and properties of modern HPC hardware architectures as well as basic programming concepts. A brief introduction into a design strategy for parallel algorithms is presented.The focus of the second part will be on the Message-Passing interface. After a short overview over general...

  20. EXIT Chart Analysis of Binary Message-Passing Decoders

    DEFF Research Database (Denmark)

    Lechner, Gottfried; Pedersen, Troels; Kramer, Gerhard

    2007-01-01

    Binary message-passing decoders for LDPC codes are analyzed using EXIT charts. For the analysis, the variable node decoder performs all computations in the L-value domain. For the special case of a hard decision channel, this leads to the well know Gallager B algorithm, while the analysis can...... be extended to channels with larger output alphabets. By increasing the output alphabet from hard decisions to four symbols, a gain of more than 1.0 dB is achieved using optimized codes. For this code optimization, the mixing property of EXIT functions has to be modified to the case of binary message-passing...

  1. Loss of European silver eel passing a hydropower station

    DEFF Research Database (Denmark)

    Pedersen, Michael Ingemann; Jepsen, Niels; Aarestrup, Kim

    2012-01-01

    The aim of this study was to assess escapement success of silver eels, Anguilla anguilla (L.), in a lowland river while passing a reservoir and a hydropower station. It was hypothesized that passage success would be lowest at the hydropower station and that survival and migration speed would...... that within the study period, only 23% of the tagged eels reached the tidal limit, mainly due to difficulties in passing the hydropower dam. With such high loss-rates, the escapement goals set in the management plan cannot be achieved...

  2. Continuum Mechanical Modelling of Skin-pass Rolling

    DEFF Research Database (Denmark)

    Kijima, Hideo; Bay, Niels

    2007-01-01

    The special contact conditions in skin-pass rolling of steel strip is analyzed by studying plane strain upsetting of thin sheet with low reduction applying long narrow tools and dry friction conditions. An extended sticking region is estimated by an elasto-plastic FEM analysis of the plane strain...... upsetting. This sticking region causes a highly inhomogeneous elasto-plastic deformation with large influence of work-hardening and friction. A numerical analysis of skin-pass rolling shows the same contact conditions, i.e. an extended sticking region around the center of the contact zone. The calculated...

  3. Analysis and Design of Binary Message-Passing Decoders

    DEFF Research Database (Denmark)

    Lechner, Gottfried; Pedersen, Troels; Kramer, Gerhard

    2012-01-01

    Binary message-passing decoders for low-density parity-check (LDPC) codes are studied by using extrinsic information transfer (EXIT) charts. The channel delivers hard or soft decisions and the variable node decoder performs all computations in the L-value domain. A hard decision channel results...... message-passing decoders. Finally, it is shown that errors on cycles consisting only of degree two and three variable nodes cannot be corrected and a necessary and sufficient condition for the existence of a cycle-free subgraph is derived....

  4. Personal Access Satellite System (PASS) study. Fiscal year 1989 results

    Science.gov (United States)

    Sue, Miles K. (Editor)

    1990-01-01

    The Jet Propulsion Laboratory is exploring the potential and feasibility of a personal access satellite system (PASS) that will offer the user greater freedom and mobility than existing or currently planned communications systems. Studies performed in prior years resulted in a strawman design and the identification of technologies that are critical to the successful implementation of PASS. The study efforts in FY-89 were directed towards alternative design options with the objective of either improving the system performance or alleviating the constraints on the user terminal. The various design options and system issues studied this year and the results of the study are presented.

  5. Algorithm on robot soccer pass and shoot a ball

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Introduces of robot soccer's competition software of Harbin Institute of Technology(HIT), the con cept of running range and the method of calculating the running range for both the opponent and our teammates according to the distances Between the ball and robot soccers, and therefore the method of calculating the angle that the robot passes or shoots the ball according to the running ranges of both sides. And gives the examples of passing the ball when the ball's position is in the backcourt and shooting the ball when the ball's position is in the frontcourt.

  6. Magnetically Tunable Terahertz Switch and Band-Pass Filter

    Institute of Scientific and Technical Information of China (English)

    ZHANG Hui; GUO Peng; CHANG Sheng-Jiang; YUAN Jing-He

    2008-01-01

    A novel design of a tunable terahertz switch and band-pass filter using liquid-crystal-filled photonic crystal waveguide is demonstrated. The effects of magnetic field on the photonic bandgaps and transmitting properties of a THz wave are investigated by using the plane wave expansion method and finite difference time domain method. The efficient photonic bandgap tuning is predicted such that the two-dimensional liquid-crystal-filled photonic crystal waveguide can serve as a switch and continuously tunable band-pass filter with controlling of the magnetic field.

  7. Delay Bound: Fractal Traffic Passes through Network Servers

    Directory of Open Access Journals (Sweden)

    Ming Li

    2013-01-01

    Full Text Available Delay analysis plays a role in real-time systems in computer communication networks. This paper gives our results in the aspect of delay analysis of fractal traffic passing through servers. There are three contributions presented in this paper. First, we will explain the reasons why conventional theory of queuing systems ceases in the general sense when arrival traffic is fractal. Then, we will propose a concise method of delay computation for hard real-time systems as shown in this paper. Finally, the delay computation of fractal traffic passing through severs is presented.

  8. 78 FR 50405 - Amended Application for Presidential Permit; Northern Pass Transmission LLC

    Science.gov (United States)

    2013-08-19

    ... Application for Presidential Permit; Northern Pass Transmission LLC AGENCY: Office of Electricity Delivery and Energy Reliability, DOE. ACTION: Notice of Amended Application. SUMMARY: Northern Pass Transmission LLC (Northern Pass) has submitted an amended application for a Presidential permit to construct,...

  9. A Dynamic Continuation-Passing Style for Dynamic Delimited Continuations

    DEFF Research Database (Denmark)

    Biernacki, Dariusz; Danvy, Olivier; Millikin, Kevin Scott

    2005-01-01

    -passing style.' We show that the new machine operates more efficiently than the definitional one and that the notion of computation induced by the corresponding evaluator takes the form of a monad. We also present new examples and a new simulation of dynamic delimited continuations in terms of static ones....

  10. Single Pass Collider Memo: Gradient Perturbations of the SLC arc

    Energy Technology Data Exchange (ETDEWEB)

    Weng, W T

    2016-12-16

    As the beam passes through the arcs, the gradient it encounters at each magnet differs from the design value. This deviation may be in part random and in part systematic. In this note we make estimates of the effects to be expected from both kinds of errors.

  11. Polarization for the by-pass SLAC/PEP collider

    Energy Technology Data Exchange (ETDEWEB)

    Chao, A.W.

    1980-06-01

    It was suggested that one can collide the store e/sup +/ beam in PEP with the e/sup /minus// beam from SLAC to reach a center-of-mass energy higher than that achieved by the PEP colliding beams. Although the future of this PEP/SLAC collider is not yet certain, it is useful to first explore its physics possibilities. One possible version of the SLAC/PEP collider utilizes a by-pass at the interaction point; the stored beam is displaced vertically by a set of vertical bending magnets every time the linac beam arrives. One feature of this by-pass scheme that makes it attractive is that the amount of the vertical displacement of the by-pass can be chosen so that the spin polarization of the stored beam is made longitudinal at the point of interaction. In this note, we have studied the various depolarization effects of the stored e/sup +/ beam due to the perturbation of the by-pass magnets. 1 fig.

  12. Vehicle dynamic effects in the course of passing over turnouts

    Directory of Open Access Journals (Sweden)

    Zelenka J.

    2007-11-01

    Full Text Available For the quantification of vehicle dynamic effects at passing over turnouts at a higher speed there was developed a methodology for evaluating of acceleration measured on vehicle axle boxes in the year 2003. The methodology is based on statistical evaluation of lateral and vertical acceleration measured values at passing over both critical parts of a turnout (tongue, frog. The created methodology was used for investigation of vehicle dynamic effects by running at speed up to 230 km/h in the year 2004 in terms of high speed tests of tilting-body unit class 680 CD. There was found relatively high values of dynamic effects already at a speed 160 km/h. In terms of tilting-body unit class 680 tests at a higher speed in curves of chosen track lines of 1st and 2nd corridor of Czech Railways there was carried out also verification of curved turnouts state according to methodology mentioned above with a view to possibility of speed increasing at curved throats of chosen stations. Lateral vehicle dynamic effects at passing over a curved turnout frog area were evaluated. There were carried out simulation calculations of vehicle passing over a turnout based on measured geometric parameters of wheelset as well as chosen turnouts. Results of the calculations were compared with measurements. The increased vehicle dynamic effects found in pulsed beats character influence negatively the turnouts part (not only wheel contacting parts as well as operating life all unsuspended parts of vehicles.

  13. Thin-disk laser multi-pass amplifier

    CERN Document Server

    Schuhmann, K; Graf, T; Hänsch, T W; Kirch, K; Kottmann, F; Pohl, R; Taqqu, D; Voß, A; Weichelt, B; Antognini, A

    2015-01-01

    In the context of the Lamb shift measurement in muonic helium we developed a thin-disk laser composed of a Q-switched oscillator and a multi-pass amplifier delivering pulses of 150 mJ at a pulse duration of 100 ns. Its peculiar requirements are stochastic trigger and short delay time (< 500 ns) between trigger and optical output. The concept of the thin-disk laser allows for energy and power scaling with high efficiency. However the single pass gain is small (about 1.2). Hence a multi-pass scheme with precise mode matching for large beam waists (w = 2 mm) is required. Instead of using the standard 4f design, we have developed a multi-pass amplifier with a beam propagation insensitive to thermal lens effects and misalignments. The beam propagation is equivalent to multiple roundtrips in an optically stable resonator. To support the propagation we used an array of 2 x 8 individually adjustable plane mirrors. Astigmatism has been minimized by a compact mirror placement. Precise alignment of the kinematic arra...

  14. Historical events: Single pass reactors and fuels fabrication

    Energy Technology Data Exchange (ETDEWEB)

    DeNeal, D.L.

    1970-04-10

    The intent of this report is to record, in one place, the significant historical events associated with the Single Pass Reactors from initial startup through December 1969. Significant events are chronologically listed in Section 1 and specific programs are summarized in Section 2.

  15. 33 CFR 401.42 - Passing hand lines.

    Science.gov (United States)

    2010-07-01

    ... behind the splice of the eye; (3) At Iroquois Lock and Lock 8, Welland Canal, both upbound and downbound... vessels of overall length in excess of 218 m in Locks 4 and 5, Welland Canal, shall secure the hand lien... lines. (a) At locks, hand lines shall be secured to the mooring lines and passed as follows: (1)...

  16. Iteration of transformation passes over attributed program trees

    NARCIS (Netherlands)

    Alblas, Henk

    1989-01-01

    Transformations of attributed program trees form an essential part of compiler optimizations. A strategy of repeatedly applying alternate attribute evaluation and tree transformation phases is discussed. An attribute evaluation phase consists of a sequence of passes over the tree. A tree transformat

  17. Morphologic Examination of the Stability of Pass Cavallo, Texas

    Science.gov (United States)

    2008-05-01

    inlet is approximately 145.7 m wider in 2007. Pass Cavallo Inlet Width Year 1860 1880 1900 1920 1940 1960 1980 2000 2020 In le t W id th , m 0 1000...Autónoma de México , San Antonio, TX, 171–189. Brouwer, R. L. 2006. Equilibrium and stability of a double inlet system. MS thesis, Department of

  18. Complete genes may pass from food to human blood

    DEFF Research Database (Denmark)

    Spisák, Sándor; Solymosi, Norbert; Ittzés, Péter

    2013-01-01

    Our bloodstream is considered to be an environment well separated from the outside world and the digestive tract. According to the standard paradigm large macromolecules consumed with food cannot pass directly to the circulatory system. During digestion proteins and DNA are thought to be degraded...

  19. Modelling of a one pass smoke tube boiler

    DEFF Research Database (Denmark)

    Karstensen, Claus M. S.; Sørensen, Kim

    2004-01-01

    A nonlinear state-space model with five states describing a one pass smoke tube boiler has been formulated. By means of mass- and energy-balance the model describes the dynamics of the Furnace, the Convection Zone and the Water/Steam Part and the three sub models are merged into an overall model...

  20. Message Passing on a Time-predictable Multicore Processor

    DEFF Research Database (Denmark)

    Sørensen, Rasmus Bo; Puffitsch, Wolfgang; Schoeberl, Martin

    2015-01-01

    Real-time systems need time-predictable computing platforms. For a multicore processor to be time-predictable, communication between processor cores needs to be time-predictable as well. This paper presents a time-predictable message-passing library for such a platform. We show how to build up...

  1. A New One-Pass Transformation into Monadic Normal Form

    DEFF Research Database (Denmark)

    Danvy, Olivier

    2003-01-01

    We present a translation from the call-by-value λ-calculus to monadic normal forms that includes short-cut boolean evaluation. The translation is higher-order, operates in one pass, duplicates no code, generates no chains of thunks, and is properly tail recursive. It makes a crucial use of symbolic...

  2. The ISO 5-pass authentication in χ-Spaces

    DEFF Research Database (Denmark)

    Cáccamo, Mario J.; Crazzolara, Federico; Milicia, Giuseppe

    2002-01-01

    We implement the ISO 5-pass authentication protocol and study its correctness using the χ-Space framework. χ-Spaces is a novel domain specific programming language designed for developing protocols and in particular security protocols. χ-Spaces programming language is an implementation of SPL...

  3. A Calculus of Communicating Systems with Label Passing

    DEFF Research Database (Denmark)

    Engberg, Uffe Henrik; Nielsen, Mogens

    Milner's Calculus of Communicating Systems (CCS) is extended with a mechanism for label passing - as an attempt to remedy some of the shortcomings of CCS w.r.t. dynamic change of agent interconnections. In the extended calculus, restriction is viewed formally as a binder, and the calculus allows...

  4. Establishing Pass/Fail Criteria for Bronchoscopy Performance

    DEFF Research Database (Denmark)

    Konge, Lars; Clementsen, Paul; Larsen, Klaus Richter;

    2012-01-01

    Background: Several tools have been created to assess competence in bronchoscopy. However, educational guidelines still use an arbitrary number of performed procedures to decide when basic competency is acquired. Objectives: The purpose of this study was to define pass/fail scores for two...

  5. The ISO 5-pass authentication in χ-Spaces

    DEFF Research Database (Denmark)

    Cáccamo, Mario J.; Crazzolara, Federico; Milicia, Giuseppe

    2002-01-01

    We implement the ISO 5-pass authentication protocol and study its correctness using the χ-Space framework. χ-Spaces is a novel domain specific programming language designed for developing protocols and in particular security protocols. χ-Spaces programming language is an implementation of SPL...

  6. Modelling of a one pass smoke tube boiler

    DEFF Research Database (Denmark)

    Karstensen, Claus M. S.; Sørensen, Kim

    2004-01-01

    A nonlinear state-space model with five states describing a one pass smoke tube boiler has been formulated. By means of mass- and energy-balance the model describes the dynamics of the Furnace, the Convection Zone and the Water/Steam Part and the three sub models are merged into an overall model...

  7. Protocol-Based Verification of Message-Passing Parallel Programs

    DEFF Research Database (Denmark)

    López-Acosta, Hugo-Andrés; Eduardo R. B. Marques, Eduardo R. B.; Martins, Francisco;

    2015-01-01

    a protocol language based on a dependent type system for message-passing parallel programs, which includes various communication operators, such as point-to-point messages, broadcast, reduce, array scatter and gather. For the verification of a program against a given protocol, the protocol is first...

  8. Buffels (Wes), Elsies, Sir Lowry's pass, Steenbras and Buffels (Oos)

    CSIR Research Space (South Africa)

    Heinecken, TJE

    1982-06-01

    Full Text Available This report is a synthesis of all available information on five of the smaller rivers discharging in to False bay combined as a single volume. The rivers dealt with are the Buffels (Wes), Elsies, Sir Lowry' Pass, Steenbras and Buffels (Oos). False...

  9. 36 CFR 72.37 - Pass-through funding.

    Science.gov (United States)

    2010-07-01

    ... is charged or is required for the services resulting through the Rehabilitation or Innovation grant... Section 72.37 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR URBAN... and Innovation § 72.37 Pass-through funding. Section 1006(a)(1) of the Act states that at the...

  10. PENGATURAN PASSING OFF DALAM PENGGUNAAN DOMAIN NAME TERKAIT DENGAN MEREK

    Directory of Open Access Journals (Sweden)

    Herti Yunita Putri

    2016-09-01

    Full Text Available In cyber world we often hear about domain name’s term. Domain name is a unique name to identify the server computer’s name like a web server or email server on a computer network or Internet. Passing off also make causes confusion in using merk from a famous brand or merk on the goods and services. Selected domain name in the internet media often creates the similar domain name with the other parties. This similar domain name are often used by people who are not responsible to take advantages of the domain name for themself. This can be caused by the presence of competition from Internet media business. This things called passing off. This research is a normative juridical research with a qualitative analysis. The legal materials include primary legal, secondary law and tertiary legal materials. Collection technique applied is literary study. Legal materials were analyzed to see the argument implementation of the definition of merk, the definition of domain name, definition of passing off, passing off in use related by merk and domain name and the rules of law in Indonesia related by merk, domain name and passing off. Big wishes in the future it can assist as a basic reference and legal considerations which are useful in Indonesian law practice. There are two passing off related to the merk and domain name, called Crybersquatting and Tiposquatting. Domain name rules are not regulated clearly in merk regulation named Act No. 15 of 2001. It regulated in PP 24 Year 1993 about The Class List of Goods or Services In Merk, Telecommunications are included in the goods or services in merk. Domain name are regulated in UDRP (Uniform Dispute Resolution Policy with competent institutions called ICANN (Internet Corporation for Assigned Names and Numbers. Dalam dunia maya (cyber world, kita sering mendengar istilah domain name. Domain name adalah nama unik yang diberikan untuk mengidentifikasi nama server komputer seperti web server atau email server di

  11. 77 FR 277 - Sabine Pass Liquefaction, LLC and Sabine Pass LNG, L.P; Notice of Availability of the...

    Science.gov (United States)

    2012-01-04

    ... the liquefaction trains, flares, recycle boil-off gas compressors, potable water, service water, and... Availability of the Environmental Assessment for the Proposed Sabine Pass Liquefaction Project The staff of the... pipeline quality natural gas from the Creole Trail Pipeline, which interconnects with the SPLNG Terminal...

  12. Influence of welding passes on grain orientation - The example of a multi-pass V-weld

    Energy Technology Data Exchange (ETDEWEB)

    Ye, Jing, E-mail: yejing@skku.edu [School of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu 440-746 (Korea, Republic of); Moysan, Joseph, E-mail: joseph.moysan@univmed.fr [Aix-Marseille Universite, Laboratoire de Mecanique et d' Acoustique, site du LCND, Av. Gaston Berger, 13625 Aix en Provence (France); Song, Sung-Jin, E-mail: sjsong@skku.edu [School of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu 440-746 (Korea, Republic of); Kim, Hak-Joon, E-mail: hjkim21c@skku.edu [School of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu 440-746 (Korea, Republic of); Chassignole, Bertrand, E-mail: bertrand.chassignole@edf.fr [Departement MMC, EDF R and D, Site des Renardieres, 77818 Moret-sur-Loing (France); Gueudre, Cecile, E-mail: cecile.gueudre@univ-amu.fr [Aix-Marseille Universite, Laboratoire de Mecanique et d' Acoustique, site du LCND, Av. Gaston Berger, 13625 Aix en Provence (France); Dupond, Olivier, E-mail: olivier.dupond@edf.fr [Departement MMC, EDF R and D, Site des Renardieres, 77818 Moret-sur-Loing (France)

    2012-05-15

    The accurate modelling of grain orientations in a weld is important, when accurate ultrasonic test predictions of a welded assembly are needed. To achieve this objective, Electricite de France (EDF) and the Laboratoire de Caracterisation Non Destructive (LCND) have developed a dedicated code, which makes use of information recorded in the welding procedure. Among the welding parameters recorded, although the order in which the welding passes are made is of primary importance in the welding process, this information is not always well known or accurately described. In the present paper we analyse in greater detail the influence of the order of welding passes, using data obtained from the Centre for Advanced Non Destructive Evaluation (CANDE), derived from a dissimilar metal weld (DMW) with buttering. Comparisons are made using grain orientation measurements on a macrograph. - Highlights: Black-Right-Pointing-Pointer Influence of welding process on grain structure is studied using the MINA model. Black-Right-Pointing-Pointer For the first time the importance of a slight slope of the layers is evaluated. Black-Right-Pointing-Pointer Two orders of passes are compared for the modelling approach. Black-Right-Pointing-Pointer A major effect is observed due to a change in the order of passes.

  13. To Pass or Not to Pass: Modeling the Movement and Affordance Dynamics of a Pick and Place Task

    Directory of Open Access Journals (Sweden)

    Maurice Lamb

    2017-06-01

    Full Text Available Humans commonly engage in tasks that require or are made more efficient by coordinating with other humans. In this paper we introduce a task dynamics approach for modeling multi-agent interaction and decision making in a pick and place task where an agent must move an object from one location to another and decide whether to act alone or with a partner. Our aims were to identify and model (1 the affordance related dynamics that define an actor's choice to move an object alone or to pass it to their co-actor and (2 the trajectory dynamics of an actor's hand movements when moving to grasp, relocate, or pass the object. Using a virtual reality pick and place task, we demonstrate that both the decision to pass or not pass an object and the movement trajectories of the participants can be characterized in terms of a behavioral dynamics model. Simulations suggest that the proposed behavioral dynamics model exhibits features observed in human participants including hysteresis in decision making, non-straight line trajectories, and non-constant velocity profiles. The proposed model highlights how the same low-dimensional behavioral dynamics can operate to constrain multiple (and often nested levels of human activity and suggests that knowledge of what, when, where and how to move or act during pick and place behavior may be defined by these low dimensional task dynamics and, thus, can emerge spontaneously and in real-time with little a priori planning.

  14. Statistics of Epidemics in Networks by Passing Messages

    Science.gov (United States)

    Shrestha, Munik Kumar

    Epidemic processes are common out-of-equilibrium phenomena of broad interdisciplinary interest. In this thesis, we show how message-passing approach can be a helpful tool for simulating epidemic models in disordered medium like networks, and in particular for estimating the probability that a given node will become infectious at a particular time. The sort of dynamics we consider are stochastic, where randomness can arise from the stochastic events or from the randomness of network structures. As in belief propagation, variables or messages in message-passing approach are defined on the directed edges of a network. However, unlike belief propagation, where the posterior distributions are updated according to Bayes' rule, in message-passing approach we write differential equations for the messages over time. It takes correlations between neighboring nodes into account while preventing causal signals from backtracking to their immediate source, and thus avoids "echo chamber effects" where a pair of adjacent nodes each amplify the probability that the other is infectious. In our first results, we develop a message-passing approach to threshold models of behavior popular in sociology. These are models, first proposed by Granovetter, where individuals have to hear about a trend or behavior from some number of neighbors before adopting it themselves. In thermodynamic limit of large random networks, we provide an exact analytic scheme while calculating the time dependence of the probabilities and thus learning about the whole dynamics of bootstrap percolation, which is a simple model known in statistical physics for exhibiting discontinuous phase transition. As an application, we apply a similar model to financial networks, studying when bankruptcies spread due to the sudden devaluation of shared assets in overlapping portfolios. We predict that although diversification may be good for individual institutions, it can create dangerous systemic effects, and as a result

  15. Li-Ion Battery By-Pass Removal Qualification

    Science.gov (United States)

    Borthomieu, Y.; Pasquier, E.

    2005-05-01

    The reasons of the by-pass use on Space batteries is to avoid open circuit, short-circuit and dramatic performances drift on the power system. By-pass diodes are currently used in NiH2 batteries due to the high probability of open circuit at cell level. This probability is mainly linked to the possibility to have a hydrogen leak within the pressure vessel due to the high operating pressure (70 bars) that can induce cell open circuit. For the Lithium-Ion batteries, first items had bypass implemented by similarity, but: All the cell failure cases have been analyzed at battery level: - Cell Open circuit: In contrast to NiCd and NiH2 cells, Li-Ion cells can be put in parallel due to the fact the open circuit voltage (OCV) is linked to the State Of Charge (SOC). With cells in parallel, a battery open circuit failure can never be encountered even with a cell in open circuit. - Cell Short circuit: In case of cell short, the entire cells within the module will be shorted. - Cell capacity spread: If the capacities of cells in series are strongly diverging, the worst module limits the battery. In case the battery is no more able to deliver the requested power for which it was designed, the worst module has to be reversed. In reversal, a Li-Ion cell is self-shorted. So, the strong capacity decrease in one module leads to the short of this module. These three failure cases cover all the possible Li-Ion failure root causes. Considering these three events, the analysis demonstrates that the Li-Ion battery still functions in any case without any by-pass system because the design of the battery size always takes into account the loss of one module. Nevertheless, the by-pass removal should allow to: - Improve the battery reliability as each bypass unit represents a single - Reduce by at least 30 % of the total price of the battery, - Reduce significant weight at battery level, - Shorten the battery manufacturing lead time (at least 8 months for by-pass purchasing), - Avoid US

  16. Belief propagation decoding of quantum channels by passing quantum messages

    Science.gov (United States)

    Renes, Joseph M.

    2017-07-01

    The belief propagation (BP) algorithm is a powerful tool in a wide range of disciplines from statistical physics to machine learning to computational biology, and is ubiquitous in decoding classical error-correcting codes. The algorithm works by passing messages between nodes of the factor graph associated with the code and enables efficient decoding of the channel, in some cases even up to the Shannon capacity. Here we construct the first BP algorithm which passes quantum messages on the factor graph and is capable of decoding the classical-quantum channel with pure state outputs. This gives explicit decoding circuits whose number of gates is quadratic in the code length. We also show that this decoder can be modified to work with polar codes for the pure state channel and as part of a decoder for transmitting quantum information over the amplitude damping channel. These represent the first explicit capacity-achieving decoders for non-Pauli channels.

  17. Single pass sparsification in the streaming model with edge deletions

    CERN Document Server

    Goel, Ashish; Post, Ian

    2012-01-01

    In this paper we give a construction of cut sparsifiers of Benczur and Karger in the {\\em dynamic} streaming setting in a single pass over the data stream. Previous constructions either required multiple passes or were unable to handle edge deletions. We use $\\tilde{O}(1/\\e^2)$ time for each stream update and $\\tilde{O}(n/\\e^2)$ time to construct a sparsifier. Our $\\e$-sparsifiers have $O(n\\log^3 n/\\e^2)$ edges. The main tools behind our result are an application of sketching techniques of Ahn et al.[SODA'12] to estimate edge connectivity together with a novel application of sampling with limited independence and sparse recovery to produce the edges of the sparsifier.

  18. Testing the Turing Test — do Men Pass It?

    Science.gov (United States)

    Adam, Ruth; Hershberg, Uri; Schul, Yaacov; Solomon, Sorin

    We are fascinated by the idea of giving life to the inanimate. The fields of Artificial Life and Artificial Intelligence (AI) attempt to use a scientific approach to pursue this desire. The first steps on this approach hark back to Turing and his suggestion of an imitation game as an alternative answer to the question "can machines think?".1 To test his hypothesis, Turing formulated the Turing test1 to detect human behavior in computers. But how do humans pass such a test? What would you say if you would learn that they do not pass it well? What would it mean for our understanding of human behavior? What would it mean for our design of tests of the success of artificial life? We report below an experiment in which men consistently failed the Turing test.

  19. Beam dynamics simulation of a double pass proton linear accelerator

    Science.gov (United States)

    Hwang, Kilean; Qiang, Ji

    2017-04-01

    A recirculating superconducting linear accelerator with the advantage of both straight and circular accelerator has been demonstrated with relativistic electron beams. The acceleration concept of a recirculating proton beam was recently proposed [J. Qiang, Nucl. Instrum. Methods Phys. Res., Sect. A 795, 77 (2015, 10.1016/j.nima.2015.05.056)] and is currently under study. In order to further support the concept, the beam dynamics study on a recirculating proton linear accelerator has to be carried out. In this paper, we study the feasibility of a two-pass recirculating proton linear accelerator through the direct numerical beam dynamics design optimization and the start-to-end simulation. This study shows that the two-pass simultaneous focusing without particle losses is attainable including fully 3D space-charge effects through the entire accelerator system.

  20. PASS Syndrome: An IL-1-Driven Autoinflammatory Disease.

    Science.gov (United States)

    Leuenberger, Mathieu; Berner, Jeanne; Di Lucca, Julie; Fischer, Lara; Kaparos, Nikolaos; Conrad, Curdin; Hohl, Daniel; So, Alexander; Gilliet, Michel

    2016-01-01

    PASS syndrome is a rare inflammatory disease characterized by a chronic-relapsing course of pyoderma gangrenosum, acne vulgaris, hidradenitis suppurativa and ankylosing spondylitis. Here, we describe a case of a patient with spontaneously recurrent purulent skin lesions along with seronegative spondylarthritis consistent with the PASS syndrome. During his disease exacerbation, the patient displayed episodes of fever along with elevated serum levels of interleukin (IL)-1β. Skin lesions were characterized by sterile neutrophilic infiltrates and showed a rapid response to the IL-1 receptor antagonist anakinra (Kineret®) consistent with the autoinflammatory nature of this disease. However, unlike other autoinflammatory diseases such as PAPA and PAPASH, we did not find mutations in the gene PSTPIP1, raising the possibility that other specific mutations in the IL-1 pathway may be involved.

  1. Les représentations du passé

    Directory of Open Access Journals (Sweden)

    Mélissa S.-Morin

    2011-04-01

    Full Text Available Complétementaires et antagonistes, les relations entre histoire et mémoire en tant qu’appropriations du passé sont une question à la fois épistémique, politique et éthique. Elles sont intimement liées à la connaissance et aux usages sociaux du passé. Si la question ne date pas d’hier, elle a pris une importance nouvelle depuis les trente dernières années sous l’impulsion de ce que les historiens Pierre Nora, François Hartog et Allan Megill ont aptement et respectivement nommé le « moment-mémo...

  2. Model Checking Real-Time Value-Passing Systems

    Institute of Scientific and Technical Information of China (English)

    Jing Chen; Zio-Ning Cao

    2004-01-01

    In this paper,to model check real-time value-passing systems,a formal language Timed Symbolic Transition Graph and a logic system named Timed Predicate μ-Calculus are proposed.An algorithm is presented which is local in that it generates and investigates the reachable state space in top-down fashion and maintains the partition for time evaluations as coarse as possible while on-the-fly instantiating data variables.It can deal with not only data variables with finite value domain,but also the so called data independent variables with infinite value domain.To authors knowledge,this is the first algorithm for model checking timed systems containing value-passing features.

  3. Proposal of a sluice-type fish pass

    Directory of Open Access Journals (Sweden)

    Matthias A. Haselbauer

    Full Text Available One-dimensional design of fish passes often leads to an unsatisfying solution. The problems are due to insufficient, if not completely missing, collaboration between biologists and civil engineers. In the present paper, a new type of fish pass is presented. A labyrinth flux develops in a system of sequential sluices and baffles in between, which uncouple the supercritical flow of the single sluices. A series of biological, hydraulic and numerical experiments was carried out in order to investigate the optimum configuration in terms of geometric issues, regarding the biological needs and performances of organisms to be transported. Following this optimization, fish can control the prevailing flow conditions quite well. Because the air entrainment into the water is avoided, fish perception is not affected. A geometric extension regarding the needs of small fish, bottom fish, and macrozoobenthos decreases the selectivity and predation pressure on them.

  4. Regulation of information passing by synaptic transmission: a short review.

    Science.gov (United States)

    Di Maio, Vito

    2008-08-15

    The largest part of information passed among neurons in the brain occurs by the means of chemical synapses connecting the axons of presynaptic neurons to the dendritic tree of the postsynaptic ones. In the present paper, the most relevant open problems related to the mechanisms of control of the information passing among neurons by synaptic transmission will be shortly reviewed. The "cross talking" between synapses, their mutual interactions and the control of the information flow between different areas of the dendritic tree will be also considered. The threshold mechanism based on the "reversal potential" will be considered for its role in the control of information transfer among neurons and also for its contribution to the information flow among different areas of the dendritic tree and to the computational ability of the single neuron. The concept of "competition for plasticity" will be proposed as a mechanism of competition based on the synaptic activation time.

  5. Denoising Message Passing for X-ray Computed Tomography Reconstruction

    CERN Document Server

    Perelli, Alessandro; Can, Ali; Davies, Mike E

    2016-01-01

    X-ray Computed Tomography (CT) reconstruction from sparse number of views is becoming a powerful way to reduce either the radiation dose or the acquisition time in CT systems but still requires a huge computational time. This paper introduces an approximate Bayesian inference framework for CT reconstruction based on a family of denoising approximate message passing (DCT-AMP) algorithms able to improve both the convergence speed and the reconstruction quality. Approximate Message Passing for Compressed Sensing has been extensively analysed for random linear measurements but there are still not clear solutions on how AMP should be modified and how it performs with real world problems. In particular to overcome the convergence issues of DCT-AMP with structured measurement matrices, we propose a disjoint preconditioned version of the algorithm tailored for both the geometric system model and the noise model. In addition the Bayesian DCT-AMP formulation allows to measure how the current estimate is close to the pr...

  6. Compressive Imaging via Approximate Message Passing with Image Denoising

    OpenAIRE

    Tan, Jin; Ma, Yanting; Baron, Dror

    2014-01-01

    We consider compressive imaging problems, where images are reconstructed from a reduced number of linear measurements. Our objective is to improve over existing compressive imaging algorithms in terms of both reconstruction error and runtime. To pursue our objective, we propose compressive imaging algorithms that employ the approximate message passing (AMP) framework. AMP is an iterative signal reconstruction algorithm that performs scalar denoising at each iteration; in order for AMP to reco...

  7. Verification-Based Interval-Passing Algorithm for Compressed Sensing

    OpenAIRE

    Wu, Xiaofu; Yang, Zhen

    2013-01-01

    We propose a verification-based Interval-Passing (IP) algorithm for iteratively reconstruction of nonnegative sparse signals using parity check matrices of low-density parity check (LDPC) codes as measurement matrices. The proposed algorithm can be considered as an improved IP algorithm by further incorporation of the mechanism of verification algorithm. It is proved that the proposed algorithm performs always better than either the IP algorithm or the verification algorithm. Simulation resul...

  8. An adaptive algorithm for pass adaptation in plate rolling

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    A new algorithm for pass adaptation in plate rolling is developed to improve thickness accuracy of plate products. The feature of the algorithm is that it uses the measured data rather than the schedule calculated data in adaptation, which leads to notable improvementin prediction accuracy of the rolling parameters and thickness accuracy of products can be improved accordingly. Results show that this adaptive algorithm is effective in practice.

  9. An adaptive algorithm for pass adaptation in plate rolling

    Institute of Scientific and Technical Information of China (English)

    ZhichunMu; WeimingLi; 等

    2002-01-01

    A new algorithm for pass adaptation in plate rolling is developed to improve thickness accuracy of plate products.The feature of the algorithm is that it uses the measured data rather than the schedule calculated data in adaptation,which leads to notable improvement in prediction accuracy of the rolling parmeters and thickness accuracy of products can be improved accordingly.Results show that this adaptive algorithm is effective in practice.

  10. Family networks and material inheritances: passing on the testimony

    Directory of Open Access Journals (Sweden)

    Marta Faria Patrão

    2012-11-01

    Full Text Available This study aims to deepen the knowledge about the process of material inheritance transmission in later life families, by studying the profiles of transmission of material legacy (what is transmitted, to whom, when and how?, the dynamics of support between donors and heirs and their influence on family satisfaction. Main results suggest that material inheritance is a normative process in later life families, involving the reorganization of the management of families’ material property and its transmission (passing on financial testimony.

  11. Quantitative modelling in cognitive ergonomics: predicting signals passed at danger

    OpenAIRE

    Moray, Neville; Groeger, John; Stanton, Neville

    2016-01-01

    This paper shows how to combine field observations, experimental data, and mathematical modeling to produce quantitative explanations and predictions of complex events in human-machine interaction. As an example we consider a major railway accident. In 1999 a commuter train passed a red signal near Ladbroke Grove, UK, into the path of an express. We use the Public Inquiry Report, "black box" data, and accident and engineering reports, to construct a case history of the accident. We show how t...

  12. One pass learning for generalized classifier neural network.

    Science.gov (United States)

    Ozyildirim, Buse Melis; Avci, Mutlu

    2016-01-01

    Generalized classifier neural network introduced as a kind of radial basis function neural network, uses gradient descent based optimized smoothing parameter value to provide efficient classification. However, optimization consumes quite a long time and may cause a drawback. In this work, one pass learning for generalized classifier neural network is proposed to overcome this disadvantage. Proposed method utilizes standard deviation of each class to calculate corresponding smoothing parameter. Since different datasets may have different standard deviations and data distributions, proposed method tries to handle these differences by defining two functions for smoothing parameter calculation. Thresholding is applied to determine which function will be used. One of these functions is defined for datasets having different range of values. It provides balanced smoothing parameters for these datasets through logarithmic function and changing the operation range to lower boundary. On the other hand, the other function calculates smoothing parameter value for classes having standard deviation smaller than the threshold value. Proposed method is tested on 14 datasets and performance of one pass learning generalized classifier neural network is compared with that of probabilistic neural network, radial basis function neural network, extreme learning machines, and standard and logarithmic learning generalized classifier neural network in MATLAB environment. One pass learning generalized classifier neural network provides more than a thousand times faster classification than standard and logarithmic generalized classifier neural network. Due to its classification accuracy and speed, one pass generalized classifier neural network can be considered as an efficient alternative to probabilistic neural network. Test results show that proposed method overcomes computational drawback of generalized classifier neural network and may increase the classification performance. Copyright

  13. Physics/computer science. Passing messages between disciplines.

    Science.gov (United States)

    Mézard, Marc

    2003-09-19

    Problems in computer science, such as error correction in information transfer and "satisfiability" in optimization, show phase transitions familiar from solid-state physics. In his Perspective, Mézard explains how recent advances in these three fields originate in similar "message passing" procedures. The exchange of elaborate messages between different variables and constraints, used in the study of phase transitions in physical systems, helps to make error correction and satisfiability codes more efficient.

  14. Interest Rate Pass-through in Sri Lanka

    OpenAIRE

    Amarasekara, Chandranath

    2005-01-01

    The Central Bank of Sri Lanka has increasingly been relying on interest rates as the instrument for conducting monetary policy. Changes to the key monetary policy variables, the Repo and the Reverse Repo rates, are initially expected to be reflected in the OMO rates and the call money market rates, before being passedthrough to commercial bank retail interest rates. It is important to obtain a good understanding of the speed and magnitude of the interest rate pass-through to make timely monet...

  15. Crossing and Passing: Discursive Borders in Off Shoring

    Directory of Open Access Journals (Sweden)

    Sanae Elmoudden

    2009-01-01

    Full Text Available As a term in popular discourse, globalisation marks a celebrated openness of global spaces. Critics of globalisation argue that a global economy creates borders that are more discursive than territorial. A current challenge to globalisation scholars is reaching an understanding of how the many configurations of context, space, time and place created by globalisation result in new ways of organizing space and identity. Based on rich ethnographic data from an off shore call centre in Morocco and informed by interdisciplinary research on space, this paper bridges the links between territorial and discursive borders in the global social network of off shoring. Metaphorical spaces come about when dynamic configurations of contexts at territorial borders relate or are made to relate. Call centre agents use metaphorical spaces to fix the meaning of space. In this article, I identify two different metaphorical spaces: crossing and passing that help agents organize and negotiate their spaces and subsequently their identities and power relations. I suggest that agents negotiate place through space. This crossing takes place as they imbricate the Moroccan context of “L’hrig” within the continuum of the call centre. I also suggest that agents negotiate space through place. This passing occurs via the imbrication of metaphorical space of polyvalence. Crossing and passing inscribe not only a literal meaning of “movement” and “disembodiment”, but also the nuanced meaning of “movement and staying” and “disembodiment and re-embodiment” in a place where conjunctions of space, time, place and context collide. The creation of metaphorical spaces of crossing and passing suggests modification of our understanding of diaspora: attaining the diasporic space can no longer depend on physical borders alone; it must also rely on discursive borders.

  16. The Project of Medical IR Materials Passed Argumentation

    Institute of Scientific and Technical Information of China (English)

    Qian Bozhang

    2012-01-01

    Research Project on the Key Technologies for Medical IR Materials and Products declared by Puyang Linshi Chemical New Materials Co., Ltd. passed the expert argumentation organized by Henan Science and Technology Department in April 2012, and was listed in the significant scientific and technological special projects of Henan Province. This project, with the re- search basis of medical IR development, will form the production capacity of 150 million pairs of medical IR surgical gloves after achieving the designed capacity.

  17. Incentive Pass-through for Residential Solar Systems in California

    Energy Technology Data Exchange (ETDEWEB)

    Dong, C. G. [Univ. of Texas, Austin, TX (United States); Wiser, Ryan [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Rai, Varun [Univ. of Texas, Austin, TX (United States)

    2014-10-01

    The deployment of solar photovoltaic (PV) systems has grown rapidly over the last decade, partly because of various government incentives. In the United States, among the largest and longest-running incentives have been those established in California. Building on past research, this report addresses the still-unanswered question: to what degree have the direct PV incentives in California been passed through from installers to consumers? This report helps address this question by carefully examining the residential PV market in California (excluding a certain class of third-party-owned PV systems) and applying both a structural-modeling approach and a reduced-form regression analysis to estimate the incentive pass-through rate. The results suggest an average pass-through rate of direct incentives of nearly 100%, though with regional differences among California counties. While these results could have multiple explanations, they suggest a relatively competitive market and well-functioning subsidy program. Further analysis is required to determine whether similar results broadly apply to other states, to other customer segments, to all third-party-owned PV systems, or to all forms of financial incentives for solar (considering not only direct state subsidies, but also utility electric bill savings and federal tax incentives).

  18. Re-evaluating the NCLEX-RN passing standard.

    Science.gov (United States)

    O'Neill, Thomas R; Marks, Casey M; Reynolds, Michelle

    2005-01-01

    Setting passing standards is a critical component of the NCLEX examination process. This research was conducted to provide sufficient information to the National Council of State Boards of Nursing's (NCSBN) Board of Directors to,make a decision regarding the passing standard of the NCLEX-RN. This article illustrates the standard setting process that NCSBN uses. Surveys of educators and employers, a modified Angoff procedure, the Beuk compromise, and global assessments by content experts were methods used. The Rasch model and a presumed ability distribution were used as the framework to integrate these diverse perspectives regarding minimal competence. The revised passing standard was -0.28 logits. For many of the minimal competence estimates, the author did not have authorization to release the information. In those instances, estimates and results were fabricated to be similar to the actual results, yet different enough as to not disclose confidential information. The fabricated results are clearly marked. In conclusion, a variety of approaches, sources, and perspectives are necessary for the establishment of fair and appropriate standards on the NCLEX-RN.

  19. Feedback Message Passing for Inference in Gaussian Graphical Models

    CERN Document Server

    Liu, Ying; Anandkumar, Animashree; Willsky, Alan S

    2011-01-01

    While loopy belief propagation (LBP) performs reasonably well for inference in some Gaussian graphical models with cycles, its performance is unsatisfactory for many others. In particular for some models LBP does not converge, and in general when it does converge, the computed variances are incorrect (except for cycle-free graphs for which belief propagation (BP) is non-iterative and exact). In this paper we propose {\\em feedback message passing} (FMP), a message-passing algorithm that makes use of a special set of vertices (called a {\\em feedback vertex set} or {\\em FVS}) whose removal results in a cycle-free graph. In FMP, standard BP is employed several times on the cycle-free subgraph excluding the FVS while a special message-passing scheme is used for the nodes in the FVS. The computational complexity of exact inference is $O(k^2n)$, where $k$ is the number of feedback nodes, and $n$ is the total number of nodes. When the size of the FVS is very large, FMP is intractable. Hence we propose {\\em approximat...

  20. A Prototype for the PASS Permanent All Sky Survey

    CERN Document Server

    Deeg, H J; Belmonte, J A; Horne, K; Alsubai, K; Cameron, A C; Doyle, L R; Horne, Keith

    2004-01-01

    A prototype system for the Permanent All Sky Survey (PASS) project is presented. PASS is a continuous photometric survey of the entire celestial sphere with a high temporal resolution. Its major objectives are the detection of all giant-planet transits (with periods up to some weeks) across stars up to mag 10.5, and to deliver continuously photometry that is useful for the study of any variable stars. The prototype is based on CCD cameras with short focal length optics on a fixed mount. A small dome to house it at Teide Observatory, Tenerife, is currently being constructed. A placement at the antarctic Dome C is also being considered. The prototype will be used for a feasibility study of PASS, to define the best observing strategies, and to perform a detailed characterization of the capabilities and scope of the survey. Afterwards, a first partial sky surveying will be started with it. That first survey may be able to detect transiting planets during its first few hundred hours of operation. It will also deli...

  1. An Improved Three-Weight Message-Passing Algorithm

    CERN Document Server

    Derbinsky, Nate; Elser, Veit; Yedidia, Jonathan S

    2013-01-01

    We describe how the powerful "Divide and Concur" algorithm for constraint satisfaction can be derived as a special case of a message-passing version of the Alternating Direction Method of Multipliers (ADMM) algorithm for convex optimization, and introduce an improved message-passing algorithm based on ADMM/DC by introducing three distinct weights for messages, with "certain" and "no opinion" weights, as well as the standard weight used in ADMM/DC. The "certain" messages allow our improved algorithm to implement constraint propagation as a special case, while the "no opinion" messages speed convergence for some problems by making the algorithm focus only on active constraints. We describe how our three-weight version of ADMM/DC can give greatly improved performance for non-convex problems such as circle packing and solving large Sudoku puzzles, while retaining the exact performance of ADMM for convex problems. We also describe the advantages of our algorithm compared to other message-passing algorithms based u...

  2. 75 FR 74029 - Sabine Pass LNG, L.P.; Notice of Application

    Science.gov (United States)

    2010-11-30

    ... Energy Regulatory Commission Sabine Pass LNG, L.P.; Notice of Application November 22, 2010. Take notice that on November 12, 2010, Sabine Pass LNG, L.P. (Sabine Pass), 700 Milam Street, Suite 800, Houston... a redundant high pressure boil off gas compressor at its existing Sabine Pass LNG Terminal,...

  3. 40 CFR 205.171-8 - Passing or failing under SEA.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Passing or failing under SEA. 205.171... Passing or failing under SEA. (a) A failing exhaust system is one which, when installed on any motorcycle... equal to the number in Column A, the sample passes. (c) Pass or failure of a SEA takes place when...

  4. 34 CFR 300.198 - Continuation of a by-pass.

    Science.gov (United States)

    2010-07-01

    ... 34 Education 2 2010-07-01 2010-07-01 false Continuation of a by-pass. 300.198 Section 300.198... CHILDREN WITH DISABILITIES State Eligibility By-Pass for Children in Private Schools § 300.198 Continuation of a by-pass. The Secretary continues a by-pass until the Secretary determines that the SEA, LEA...

  5. 34 CFR 300.192 - Notice of intent to implement a by-pass.

    Science.gov (United States)

    2010-07-01

    ... 34 Education 2 2010-07-01 2010-07-01 false Notice of intent to implement a by-pass. 300.192... EDUCATION OF CHILDREN WITH DISABILITIES State Eligibility By-Pass for Children in Private Schools § 300.192 Notice of intent to implement a by-pass. (a) Before taking any final action to implement a by-pass,...

  6. 20 CFR 416.1226 - What is a plan to achieve self-support (PASS)?

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 2 2010-04-01 2010-04-01 false What is a plan to achieve self-support (PASS... self-support (PASS)? (a) A PASS must— (1) Be designed especially for you; (2) Be in writing; (3) Be...: A Substantial Reduction Exists. Your SSI monthly payment amount is $101 and your PASS...

  7. 20 CFR 416.1181 - What is a plan to achieve self-support (PASS)?

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 2 2010-04-01 2010-04-01 false What is a plan to achieve self-support (PASS... Self-Support § 416.1181 What is a plan to achieve self-support (PASS)? (a) A PASS must— (1) Be designed... Exists. Your SSI monthly payment amount is $101 and your PASS employment goal earnings will reduce...

  8. 34 CFR 300.191 - Provisions for services under a by-pass.

    Science.gov (United States)

    2010-07-01

    ... 34 Education 2 2010-07-01 2010-07-01 false Provisions for services under a by-pass. 300.191... EDUCATION OF CHILDREN WITH DISABILITIES State Eligibility By-Pass for Children in Private Schools § 300.191 Provisions for services under a by-pass. (a) Before implementing a by-pass, the Secretary consults...

  9. 26 CFR 301.6223(h)-1 - Responsibilities of pass-thru partner.

    Science.gov (United States)

    2010-04-01

    ... 26 Internal Revenue 18 2010-04-01 2010-04-01 false Responsibilities of pass-thru partner. 301.6223... Responsibilities of pass-thru partner. (a) In general. The pass-thru partner shall, within 30 days of receiving... tax matters partner, or another pass-thru partner, forward a copy of that notice or information to...

  10. 76 FR 78144 - Amendment of Class E Airspace; Anaktuvuk Pass, AK

    Science.gov (United States)

    2011-12-16

    ... Federal Aviation Administration 14 CFR Part 71 Amendment of Class E Airspace; Anaktuvuk Pass, AK AGENCY... airspace at Anaktuvuk Pass Airport, Anaktuvuk Pass, AK. The creation of two standard instrument approach... Federal Register a notice of proposed rulemaking (NPRM) to amend controlled airspace at Anaktuvuk Pass,...

  11. 33 CFR 80.840 - Sabine Pass, TX to Galveston, TX.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Sabine Pass, TX to Galveston, TX... INTERNATIONAL NAVIGATION RULES COLREGS DEMARCATION LINES Eighth District § 80.840 Sabine Pass, TX to Galveston, TX. (a) A line drawn from the Sabine Pass East Jetty Light to the seaward end of the Sabine Pass...

  12. Numerical analysis of gain and noise figure in different configurations of single-pass and double-pass EDFA

    Science.gov (United States)

    Parali, Ufuk; Pınar, Cahit

    2016-04-01

    In this study our main objective is to design new Erbium-doped fiber amplifier (EDFA) configurations to obtain higher gain and lower noise figure (NF) values using an input signal -35 dBm at the wavelength of 1550 nm and the pump power 14 mW at the wavelength of 1480 nm. Utilizing Giles and Desurvire model, we proposed miscellaneous Single Pass (SP) and Double Pass (DP) EDFA configurations different in the means of pump signal direction where the two level system model equations are solved numerically in Matlab. The physical properties of the simulated EDFA configurations such as gain, noise factor, population density and amplified spontaneous emission were studied under various pumping directions.

  13. Analysis of CAB/UTIL & IFE/PASS SEAT Switch%浅谈CAB/UTIL和IFE/PASS SEAT电门

    Institute of Scientific and Technical Information of China (English)

    郭佳

    2015-01-01

    B737NG飞机P5-13电源面板存在两种构型,“CAB/UTIL”和“IFE/PASS SEAT”属于新构型中的两个电门,本文在结合手册与实际现象的基础上,分析了这两个电门的功用,避免在将来的排故过程中走弯路。%There are two configurations of B737NG aircraft P5-13 power supply panel, the"CAB/UTIL" and"IFE/PASS SEAT"belong to the two switches in the new configuration, based on the combination of manual and actual phenomena, this paper analyzes the function of these switches, to avoid detours during troubleshooting in the future.

  14. PENN PASS: a program for graduates of foreign dental schools.

    Science.gov (United States)

    Berthold, P; Lopez, N

    1994-01-01

    An increasing number of graduates of foreign dental schools who enroll in advanced standing programs to qualify for licensure calls for dental schools to be prepared to handle not only the curricular demands but also the growing cultural diversity among its student population. The "reeducation" of this student group not only meets the need of foreign dentists for an American degree but may also provide health professionals to service various ethnic populations whose language and culture they are able to understand and identify with. A survey of students and graduates of a two-year Program for Advanced Standing Students (PASS) for graduates of foreign dental schools representing 34 countries aimed to arrive at an understanding of this student group through characterization of the foreign dentists and identification of their attitudes and feelings toward various aspects of the program, the school and faculty and their experience of stress. This report includes description of the distinctive features of the program which cater to specific needs and concerns of this non-traditional group of dental students. PASS students are accepted on the basis of their grades in dental school in home country, scores in the National Dental Board Examination Part I, Test of English as Foreign Language (TOEFL), and ratings in personal interviews. They complete an intensive summer program consisting of didactic and laboratory courses which prepares them for integration with four-year students for the last two years of didactic and clinical curriculum. Cultural diversity seminars, a special English class, PASS class meetings and seminars are unique additions to their program and aim to assist them adjust to the educational, social and cultural systems in an American school. Results of the survey show a majority of the PASS students feel that they are part of the school and that there is someone in the school whom they can approach for problems. An understanding of their ethnic and

  15. Line-item veto may pass this month

    Science.gov (United States)

    U.S. House and Senate Republicans have cleared the way for legislation to give the President the power of a line-item-veto in time for the 1998 budget season.The line-item veto, as proposed, would allow the President to remove from appropriations bills selected appropriations items, new entitlement spending, or narrowly targeted tax breaks. Once a line item is cut from the budget, Congress would have to pass a separate appropriations bill for that individual item; that new, separate bill would then be subject to the traditional Presidential veto.

  16. Forgotten Kirschner wire passing across the sigmoid colon.

    Science.gov (United States)

    Matsumoto, Hiroshi; Yo, Shogen; Fukushima, Shinya; Osawa, Motoyasu; Murao, Takahiro; Ishii, Manabu; Fujita, Minoru; Shiotani, Akiko

    2017-04-01

    The Kirschner wire (K-wire) is used in the treatment of hip fractures, and migration of a K-wire into the pelvis with resultant colon injury is a very rare complication. We report a case in which a forgotten K-wire passing across the sigmoid colon was accidentally found by screening colonoscopy in a patient with no abdominal symptoms. Surgery was performed to remove the K-wire. Although the migration of a K-wire is extremely rare, it is important for it to be considered in patients with a history of orthopedic surgery.

  17. Band-pass filtered velocity statistics in decaying turbulent box

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    For homogeneous isotropic turbulence study,the acquisition of band-pass filtered velocity increments(FVI) in a non-forced turbulent box is still a challenge both experimentally and numerically.Turbulence and associated physical processes,at a given instant,are permanently contaminated by a forcing process which can seldom be universal.The situation tends to be the origin of intermittency and the non-Gaussian probability density distribution for acceleration and velocity gradients.To reveal implied mechanism...

  18. UAVSAR: Airborne L-band Radar for Repeat Pass Interferometry

    Science.gov (United States)

    Moes, Timothy R.

    2009-01-01

    The primary objectives of the UAVSAR Project were to: a) develop a miniaturized polarimetric L-band synthetic aperture radar (SAR) for use on an unmanned aerial vehicle (UAV) or piloted vehicle. b) develop the associated processing algorithms for repeat-pass differential interferometric measurements using a single antenna. c) conduct measurements of geophysical interest, particularly changes of rapidly deforming surfaces such as volcanoes or earthquakes. Two complete systems were developed. Operational Science Missions began on February 18, 2009 ... concurrent development and testing of the radar system continues.

  19. Battle of Kasserine Pass: Defeat is a Matter of Scale

    Science.gov (United States)

    2016-05-26

    America’s First Battles, 247. 7 Ernest Harmon, Combat Commander: Autobiography of a Soldier (New Jersey: Prentice- Hall , 1970), 146. 5 ENGIMA. The...Armored Division on February 14. The 10th Panzer Division quickly destroyed the ten M3 Stuart tanks of the 2nd Battalion, 168th Regimental Combat Team...Kasserine Pass.44 He is correct if he is comparing the diminutive M3 Stuart or the cobbled together M3 Grant/Lee to the German Panzer IV. The M4 Sherman

  20. Time Really Passes, Science Can't Deny That

    CERN Document Server

    Gisin, Nicolas

    2016-01-01

    Today's science provides quite a lean picture of time as a mere geometric evolution parameter. I argue that time is much richer. In particular, I argue that besides the geometric time, there is creative time, when objective chance events happen. The existence of the latter follows straight from the existence of free-will. Following the french philosopher Lequyer, I argue that free-will is a prerequisite for the possibility to have rational argumentations, hence can't be denied. Consequently, science can't deny the existence of creative time and thus that time really passes.

  1. Double passing the Kitt Peak 1-m Fourier transform spectrometer

    Science.gov (United States)

    Jennings, D. E.; Hubbard, R.; Brault, J. W.

    1985-01-01

    Attention is given to a simple technique for performing the conversion of the Kitt Peak 1-m Fourier transform spectrometer's dual input/output optical configuration to a double pass configuration that improves spectral resolution by a factor of 2. The modification is made by placing a flat mirror in the output beam from each cat's eye, retroreflecting the beams back through the cat's eyes to the first beam splitter. A single detector is placed at the second input port, which then becomes the instrument's output.

  2. Single pass Doppler positioning for Search and Rescue satellite missions

    Science.gov (United States)

    Schmid, P. E.; Vonbun, F. O.; Lynn, J. J.

    1976-01-01

    This paper describes the implementation of beacon location experiments involving the NASA Nimbus-6 and the Amateur Satellite Corporation (AMSAT) Oscar-6 and Oscar-7 spacecraft. The purpose of these experiments is to demonstrate the feasibility of determining the geographical location of a low power VHF 'distress beacon' via satellite. Doppler data collected during satellite passes is reduced in a mini-computer by means of a simple algorithm resulting in the simultaneous recovery of the unknown receiver coordinates and the unknown Doppler bias frequency. Results indicate point positioning to within a few kilometers - which is within the required accuracies for the positioning of downed aircraft for Search/Rescue missions.

  3. Vehicle passes detector based on multi-sensor analysis

    Science.gov (United States)

    Bocharov, D.; Sidorchuk, D.; Konovalenko, I.; Koptelov, I.

    2015-02-01

    The study concerned deals with a new approach to the problem of detecting vehicle passes in vision-based automatic vehicle classification system. Essential non-affinity image variations and signals from induction loop are the events that can be considered as detectors of an object presence. We propose several vehicle detection techniques based on image processing and induction loop signal analysis. Also we suggest a combined method based on multi-sensor analysis to improve vehicle detection performance. Experimental results in complex outdoor environments show that the proposed multi-sensor algorithm is effective for vehicles detection.

  4. Message Passing Algorithms for Compressed Sensing: I. Motivation and Construction

    CERN Document Server

    Donoho, David L; Montanari, Andrea

    2009-01-01

    In a recent paper, the authors proposed a new class of low-complexity iterative thresholding algorithms for reconstructing sparse signals from a small set of linear measurements \\cite{DMM}. The new algorithms are broadly referred to as AMP, for approximate message passing. This is the first of two conference papers describing the derivation of these algorithms, connection with the related literature, extensions of the original framework, and new empirical evidence. In particular, the present paper outlines the derivation of AMP from standard sum-product belief propagation, and its extension in several directions. We also discuss relations with formal calculations based on statistical mechanics methods.

  5. Low-pass sequencing for microbial comparative genomics

    Directory of Open Access Journals (Sweden)

    Kennedy Sean

    2004-01-01

    Full Text Available Abstract Background We studied four extremely halophilic archaea by low-pass shotgun sequencing: (1 the metabolically versatile Haloarcula marismortui; (2 the non-pigmented Natrialba asiatica; (3 the psychrophile Halorubrum lacusprofundi and (4 the Dead Sea isolate Halobaculum gomorrense. Approximately one thousand single pass genomic sequences per genome were obtained. The data were analyzed by comparative genomic analyses using the completed Halobacterium sp. NRC-1 genome as a reference. Low-pass shotgun sequencing is a simple, inexpensive, and rapid approach that can readily be performed on any cultured microbe. Results As expected, the four archaeal halophiles analyzed exhibit both bacterial and eukaryotic characteristics as well as uniquely archaeal traits. All five halophiles exhibit greater than sixty percent GC content and low isoelectric points (pI for their predicted proteins. Multiple insertion sequence (IS elements, often involved in genome rearrangements, were identified in H. lacusprofundi and H. marismortui. The core biological functions that govern cellular and genetic mechanisms of H. sp. NRC-1 appear to be conserved in these four other halophiles. Multiple TATA box binding protein (TBP and transcription factor IIB (TFB homologs were identified from most of the four shotgunned halophiles. The reconstructed molecular tree of all five halophiles shows a large divergence between these species, but with the closest relationship being between H. sp. NRC-1 and H. lacusprofundi. Conclusion Despite the diverse habitats of these species, all five halophiles share (1 high GC content and (2 low protein isoelectric points, which are characteristics associated with environmental exposure to UV radiation and hypersalinity, respectively. Identification of multiple IS elements in the genome of H. lacusprofundi and H. marismortui suggest that genome structure and dynamic genome reorganization might be similar to that previously observed in the

  6. Fault-tolerant Agreement in Synchronous Message-passing Systems

    CERN Document Server

    Raynal, Michel

    2010-01-01

    The present book focuses on the way to cope with the uncertainty created by process failures (crash, omission failures and Byzantine behavior) in synchronous message-passing systems (i.e., systems whose progress is governed by the passage of time). To that end, the book considers fundamental problems that distributed synchronous processes have to solve. These fundamental problems concern agreement among processes (if processes are unable to agree in one way or another in presence of failures, no non-trivial problem can be solved). They are consensus, interactive consistency, k-set agreement an

  7. Ring formation by tidal disruption of a passing body

    Science.gov (United States)

    Hyodo, Ryuki; Charnoz, Sébastien; Genda, Hidenori; Ohtsuki, Keiji

    2016-10-01

    The origin of rings around giant planets remains elusive. Here we investigate the tidal disruption of a passing object and the subsequent formation of planetary rings. First, we perform SPH simulations of the tidal destruction of differentiated objects with the mass of M~1022kg that experience close encounters with Saturn or Uranus. We find that about 0.1-10% of the mass of the passing body is gravitationally captured around the planet. However, these fragments are initially big chunks and have highly eccentric orbits around the planet. Therefore, in order to see their long-term evolution, we perform N-body simulations including the planet's oblateness up to J4 starting with data obtained from the SPH simulations. Our N-body simulations show that the chunks are tidally destructed during their next several orbits and become collections of smaller particles. Their individual orbits then start to precess incoherently around the planet's equator, which enhances their encounter velocities on longer-term evolution, resulting in more destructive impacts. These collisions would damp their eccentricities resulting in a progressive collapse of the debris cloud into a thin equatorial and low-eccentricity ring.

  8. Quantitative modelling in cognitive ergonomics: predicting signals passed at danger.

    Science.gov (United States)

    Moray, Neville; Groeger, John; Stanton, Neville

    2017-02-01

    This paper shows how to combine field observations, experimental data and mathematical modelling to produce quantitative explanations and predictions of complex events in human-machine interaction. As an example, we consider a major railway accident. In 1999, a commuter train passed a red signal near Ladbroke Grove, UK, into the path of an express. We use the Public Inquiry Report, 'black box' data, and accident and engineering reports to construct a case history of the accident. We show how to combine field data with mathematical modelling to estimate the probability that the driver observed and identified the state of the signals, and checked their status. Our methodology can explain the SPAD ('Signal Passed At Danger'), generate recommendations about signal design and placement and provide quantitative guidance for the design of safer railway systems' speed limits and the location of signals. Practitioner Summary: Detailed ergonomic analysis of railway signals and rail infrastructure reveals problems of signal identification at this location. A record of driver eye movements measures attention, from which a quantitative model for out signal placement and permitted speeds can be derived. The paper is an example of how to combine field data, basic research and mathematical modelling to solve ergonomic design problems.

  9. Passing messages between biological networks to refine predicted interactions.

    Directory of Open Access Journals (Sweden)

    Kimberly Glass

    Full Text Available Regulatory network reconstruction is a fundamental problem in computational biology. There are significant limitations to such reconstruction using individual datasets, and increasingly people attempt to construct networks using multiple, independent datasets obtained from complementary sources, but methods for this integration are lacking. We developed PANDA (Passing Attributes between Networks for Data Assimilation, a message-passing model using multiple sources of information to predict regulatory relationships, and used it to integrate protein-protein interaction, gene expression, and sequence motif data to reconstruct genome-wide, condition-specific regulatory networks in yeast as a model. The resulting networks were not only more accurate than those produced using individual data sets and other existing methods, but they also captured information regarding specific biological mechanisms and pathways that were missed using other methodologies. PANDA is scalable to higher eukaryotes, applicable to specific tissue or cell type data and conceptually generalizable to include a variety of regulatory, interaction, expression, and other genome-scale data. An implementation of the PANDA algorithm is available at www.sourceforge.net/projects/panda-net.

  10. Passing messages between biological networks to refine predicted interactions.

    Science.gov (United States)

    Glass, Kimberly; Huttenhower, Curtis; Quackenbush, John; Yuan, Guo-Cheng

    2013-01-01

    Regulatory network reconstruction is a fundamental problem in computational biology. There are significant limitations to such reconstruction using individual datasets, and increasingly people attempt to construct networks using multiple, independent datasets obtained from complementary sources, but methods for this integration are lacking. We developed PANDA (Passing Attributes between Networks for Data Assimilation), a message-passing model using multiple sources of information to predict regulatory relationships, and used it to integrate protein-protein interaction, gene expression, and sequence motif data to reconstruct genome-wide, condition-specific regulatory networks in yeast as a model. The resulting networks were not only more accurate than those produced using individual data sets and other existing methods, but they also captured information regarding specific biological mechanisms and pathways that were missed using other methodologies. PANDA is scalable to higher eukaryotes, applicable to specific tissue or cell type data and conceptually generalizable to include a variety of regulatory, interaction, expression, and other genome-scale data. An implementation of the PANDA algorithm is available at www.sourceforge.net/projects/panda-net.

  11. A cryogenic circulating advective multi-pass absorption cell

    Science.gov (United States)

    Stockett, M. H.; Lawler, J. E.

    2012-03-01

    A novel absorption cell has been developed to enable a spectroscopic survey of a broad range of polycyclic aromatic hydrocarbons (PAH) under astrophysically relevant conditions and utilizing a synchrotron radiation continuum to test the still controversial hypothesis that these molecules or their ions could be carriers of the diffuse interstellar bands. The cryogenic circulating advective multi-pass absorption cell resembles a wind tunnel; molecules evaporated from a crucible or injected using a custom gas feedthrough are entrained in a laminar flow of cryogenically cooled buffer gas and advected into the path of the synchrotron beam. This system includes a multi-pass optical White cell enabling absorption path lengths of hundreds of meters and a detection sensitivity to molecular densities on the order of 107 cm-3. A capacitively coupled radio frequency dielectric barrier discharge provides ionized and metastable buffer gas atoms for ionizing the candidate molecules via charge exchange and the Penning effect. Stronger than expected clustering of PAH molecules has slowed efforts to record gas phase PAH spectra at cryogenic temperatures, though such clusters may play a role in other interstellar phenomena.

  12. Some Difficult-to-pass Tests of Randomness

    Directory of Open Access Journals (Sweden)

    George Marsaglia

    2002-01-01

    Full Text Available We describe three tests of randomness-- tests that many random number generators fail. In particular, all congruential generators-- even those based on a prime modulus-- fail at least one of the tests, as do many simple generators, such as shift register and lagged Fibonacci. On the other hand, generators that pass the three tests seem to pass all the tests in the Diehard Battery of Tests. Note that these tests concern the randomness of a generator's output as a sequence of independent, uniform 32-bit integers. For uses where the output is converted to uniform variates in [0,1, potential flaws of the output as integers will seldom cause problems after the conversion. Most generators seem to be adequate for producing a set of uniform reals in [0,1, but several important applications, notably in cryptography and number theory-- for example, establishing probable primes, complexity of factoring algorithms, random partitions of large integers-- may require satisfactory performance on the kinds of tests we describe here.

  13. 9 CFR 310.8 - Passing and marking of carcasses and parts.

    Science.gov (United States)

    2010-01-01

    ... INSPECTION AND CERTIFICATION POST-MORTEM INSPECTION § 310.8 Passing and marking of carcasses and parts... lesions are passed for food or for cooking and “U.S. Retained” tags are attached to the carcasses,...

  14. 75 FR 62512 - Sabine Pass Liquefaction, LLC; Application for Long-Term Authorization To Export Liquefied...

    Science.gov (United States)

    2010-10-12

    ... in Cameron Parish, Louisiana that is owned by Sabine Pass's affiliate, Sabine Pass LNG, L.P. (Sabine... LNG acting on its own behalf or as agent for others. Citing the nature and complexity of current...

  15. A Review of Indirect Bridge Monitoring Using Passing Vehicles

    Directory of Open Access Journals (Sweden)

    Abdollah Malekjafarian

    2015-01-01

    Full Text Available Indirect bridge monitoring methods, using the responses measured from vehicles passing over bridges, are under development for about a decade. A major advantage of these methods is that they use sensors mounted on the vehicle, no sensors or data acquisition system needs to be installed on the bridge. Most of the proposed methods are based on the identification of dynamic characteristics of the bridge from responses measured on the vehicle, such as natural frequency, mode shapes, and damping. In addition, some of the methods seek to directly detect bridge damage based on the interaction between the vehicle and bridge. This paper presents a critical review of indirect methods for bridge monitoring and provides discussion and recommendations on the challenges to be overcome for successful implementation in practice.

  16. Continuation-Passing C, compiling threads to events through continuations

    CERN Document Server

    Kerneis, Gabriel

    2010-01-01

    In this paper, we introduce Continuation Passing C (CPC), a programming language for concurrent systems in which native and cooperative threads are unified and presented to the programmer as a single abstraction. The CPC compiler uses a compilation technique, based on the CPS transform, that yields efficient code and an extremely lightweight representation for contexts. We provide a complete proof of the correctness of our compilation scheme. We show in particular that lambda-lifting, a common compilation technique for functional languages, is also correct in an imperative language like C, under some conditions enforced by the CPC compiler. The current CPC compiler is mature enough to write substantial programs such as Hekate, a highly concurrent BitTorrent seeder. Our benchmark results show that CPC is as efficient, while significantly cheaper, as the most efficient thread libraries available.

  17. IMP: A Message-Passing Algorithmfor Matrix Completion

    CERN Document Server

    Kim, Byung-Hak; Pfister, Henry D

    2010-01-01

    A new message-passing (MP) method is considered for the matrix completion problem associated with recommender systems. We attack the problem using a (generative) factor graph model that is related to a probabilistic low-rank matrix factorization. Based on the model, we propose a new algorithm, termed IMP, for the recovery of a data matrix from incomplete observations. The algorithm is based on a clustering followed by inference via MP (IMP). The algorithm is compared with a number of other matrix completion algorithms on real collaborative filtering (e.g., Netflix) data matrices. Our results show that, while many methods perform similarly with a large number of revealed entries, the IMP algorithm outperforms all others when the fraction of observed entries is small. This is helpful because it reduces the well-known cold-start problem associated with collaborative filtering (CF) systems in practice.

  18. Ionospheric effects on repeat-pass SAR interferometry

    Science.gov (United States)

    Feng, Jian; Zhen, Weimin; Wu, Zhensen

    2017-10-01

    InSAR measurements can be significantly affected by the atmosphere when the radar signal propagates through the atmosphere since it varies with space and time. Great efforts have been made in recent years to better understand the properties of the tropospheric effects and to develop methods for mitigating these effects. By using the basic principles of InSAR, the quantitative analysis of ionospheric delay effects on topography and surface deformation have been introduced for the first time. The measurement errors can be related to the vertical ionospheric total electron content (vTEC). By using the ionospheric observations, the effects of temporal ionospheric variations on InSAR have been analyzed. The results indicate that the ionospheric variations with time, season, solar cycle and geomagnetic activities can compromise the effectiveness of InSAR for both the measurement of topography and surface determination. The repeat-pass SAR interferometry errors induced by ionosphere should be corrected by actual measurements.

  19. Geometric Separation by Single-Pass Alternating Thresholding

    CERN Document Server

    Kutyniok, Gitta

    2012-01-01

    Modern data is customarily of multimodal nature, and analysis tasks typically require separation into the single components. Although a highly ill-posed problem, the morphological difference of these components sometimes allow a very precise separation such as, for instance, in neurobiological imaging a separation into spines (pointlike structures) and dendrites (curvilinear structures). Recently, applied harmonic analysis introduced powerful methodologies to achieve this task, exploiting specifically designed representation systems in which the components are sparsely representable, combined with either performing $\\ell_1$ minimization or thresholding on the combined dictionary. In this paper we provide a thorough theoretical study of the separation of a distributional model situation of point- and curvilinear singularities exploiting a surprisingly simple single-pass alternating thresholding method applied to the two complementary frames: wavelets and curvelets. Utilizing the fact that the coefficients are ...

  20. Analyze single- and multiple-pass heat exchangers

    Energy Technology Data Exchange (ETDEWEB)

    Ratnam, R. (Univ. of Illinois, Urbana-Champagne, IL (United States)); Patwardhan, V.S. (National Chemical Lab., Poona (India))

    1993-06-01

    Heat exchanger calculations generally address the design problem (where for given process conditions and heat exchanger duty, a geometry is selected and the area is estimated) or they address the simulation problem (where for a given geometry, overall heat-transfer coefficient, and heat-transfer area, the heat duty and the outlet temperatures are determined). The latter is particularly useful when predicting the performance of heat exchanger networks. This article presents a novel graphical method that is suitable for design, simulation, and some operational studies, and is applicable to both single-pass and multipass heat exchangers. The main advantage of these graphs over earlier graphical representations is that they are uniformly applicable for a variety of problems. Although graphical techniques are useful for understanding underlying relationships, they are not suitable for computer implementation. However, these relationships can be computerized fairly easily.

  1. Risk-based scheduling of multiple search passes for UUVs

    Science.gov (United States)

    Baylog, John G.; Wettergren, Thomas A.

    2016-05-01

    This paper addresses selected computational aspects of collaborative search planning when multiple search agents seek to find hidden objects (i.e. mines) in operating environments where the detection process is prone to false alarms. A Receiver Operator Characteristic (ROC) analysis is applied to construct a Bayesian cost objective function that weighs and combines missed detection and false alarm probabilities. It is shown that for fixed ROC operating points and a validation criterion consisting of a prerequisite number of detection outcomes, an interval exists in the number of conducted search passes over which the risk objective function is supermodular. We show that this property is not retained beyond validation criterion boundaries. We investigate the use of greedy algorithms for distributing search effort and, in particular, examine the double greedy algorithm for its applicability under conditions of varying criteria. Numerical results are provided to demonstrate the effectiveness of the approach.

  2. Interest Rate Pass-Through: The Case of Indonesia

    Directory of Open Access Journals (Sweden)

    Chandra Utama

    2017-07-01

    Full Text Available This paper examines the direct and indirect interest rate pass-trough (IRPT from policy interest rate (BI rate to banks’ retail interest rates in Indonesia during a full-fledged inflation-targeting regime. We use montly data of policy interest rate (BI rate as well as interest rates for interbank money market (interbank, deposit, and loan during July 2005 to May 2015. We employ Error Correction Mechanism (ECM and Ordinary Least Square (OLS to find the significant of IRPT and the speed of adjustment process of IRPT. The study suggests the existence of direct and indirect IRPT in Indonesia. The change of policy rate is transmitted quicker in the direct channel compared to the indirect channel. However, indirect channel is more stable than the direct channel. We conclude that the direct and indirect IRPT are complementary.

  3. Precession of Toroidally Passing Particles in Tokamaks and Spherical Tori

    Energy Technology Data Exchange (ETDEWEB)

    Ya.I. Kolesnichenko; R.B.White; Yu.V. Yakovenko

    2003-01-30

    The toroidal precession of the well-circulating particles and particles that are passing toroidally but trapped poloidally is studied. Expressions for the precession frequency, which are convenient for practical use, are obtained and analyzed. It is found that the key parameters that determine the magnitude and the direction of the precession velocity are the plasma elongation, the magnitudes and profiles of the safety factor and beta defined as the ratio of the local plasma pressure to the magnetic field pressure at the magnetic axis. An important role of the ''paramagnetic'' precession in highly elongated plasmas is revealed. The analysis carried out is based on the obtained expressions for the equilibrium magnetic field strength and the field line curvature.

  4. Approximate message passing with restricted Boltzmann machine priors

    Science.gov (United States)

    Tramel, Eric W.; Drémeau, Angélique; Krzakala, Florent

    2016-07-01

    Approximate message passing (AMP) has been shown to be an excellent statistical approach to signal inference and compressed sensing problems. The AMP framework provides modularity in the choice of signal prior; here we propose a hierarchical form of the Gauss-Bernoulli prior which utilizes a restricted Boltzmann machine (RBM) trained on the signal support to push reconstruction performance beyond that of simple i.i.d. priors for signals whose support can be well represented by a trained binary RBM. We present and analyze two methods of RBM factorization and demonstrate how these affect signal reconstruction performance within our proposed algorithm. Finally, using the MNIST handwritten digit dataset, we show experimentally that using an RBM allows AMP to approach oracle-support performance.

  5. [Percutaneous transluminal angioplasty in vascular by-passes].

    Science.gov (United States)

    Rodríguez, J E; Fernández Guinea, O; López, V; Suárez Pereiro, M J; Reimunde, E; Cosío, J M; Barreiro, A

    1993-01-01

    Results from 21 cases of percutaneous transluminal angioplasties as a treatment of stenosed vascular by-pass from 16 patients, are presented. The technique took place in 10 cases at the aorto-femoral area, in others 10 cases at the popliteal-femoral area and, in the last one, at the carotid-subclavian area. Preliminary results were successful in all cases (100%). Follow-up showed a better long-term results at the aorto-femoral level. Considering the satisfactory results and also considering that, in case of negative results or re-stenosis, other surgical techniques could be performed, we conclude that the percutaneous transluminal angioplasty should be the first treatment for such of injuries.

  6. Approximate Message Passing with Restricted Boltzmann Machine Priors

    CERN Document Server

    Tramel, Eric W; Krzakala, Florent

    2015-01-01

    Approximate Message Passing (AMP) has been shown to be an excellent statistical approach to signal inference and compressed sensing problem. The AMP framework provides modularity in the choice of signal prior; here we propose a hierarchical form of the Gauss-Bernouilli prior which utilizes a Restricted Boltzmann Machine (RBM) trained on the signal support to push reconstruction performance beyond that of simple iid priors for signals whose support can be well represented by a trained binary RBM. We present and analyze two methods of RBM factorization and demonstrate how these affect signal reconstruction performance within our proposed algorithm. Finally, using the MNIST handwritten digit dataset, we show experimentally that using an RBM allows AMP to approach oracle-support performance.

  7. MPI-2: Extending the Message-Passing Interface

    Energy Technology Data Exchange (ETDEWEB)

    Geist, A. [Oak Ridge National Lab., TN (United States); Gropp, W.; Lusk, E. [Argonne National Lab., IL (United States); Huss-Lederman, S. [Argonne National Lab., IL (United States)]|[Wisconsin Univ., Madison, WI (United States); Lumsdaine, A. [Notre Dame Univ., IN (United States); Saphir, W. [NAS (United States); Skjellum, T. [Mississippi State Univ., MS (United States); Snir, M. [IBM Corp. (United States)

    1996-10-01

    This paper describes current activities of the MPI-2 Forum. The MPI - 2 Forum is a group of parallel computer vendors, library writers, and application specialists working together to define a set of extensions to MPI (Message Passing Interface). MPI was defined by the same process and now has many implementations, both vendor- proprietary and publicly available, for a wide variety of parallel computing environments. In this paper we present the salient aspects of the evolving MPI-2 document as it now stands. We discuss proposed extensions and enhancements to MPI in the areas of dynamic process management, one-sided operations, collective operations, new language binding, real-time computing, external interfaces, and miscellaneous topics.

  8. Incremental learning by message passing in hierarchical temporal memory.

    Science.gov (United States)

    Rehn, Erik M; Maltoni, Davide

    2014-08-01

    Hierarchical temporal memory (HTM) is a biologically inspired framework that can be used to learn invariant representations of patterns in a wide range of applications. Classical HTM learning is mainly unsupervised, and once training is completed, the network structure is frozen, thus making further training (i.e., incremental learning) quite critical. In this letter, we develop a novel technique for HTM (incremental) supervised learning based on gradient descent error minimization. We prove that error backpropagation can be naturally and elegantly implemented through native HTM message passing based on belief propagation. Our experimental results demonstrate that a two-stage training approach composed of unsupervised pretraining and supervised refinement is very effective (both accurate and efficient). This is in line with recent findings on other deep architectures.

  9. Parallelization of a hydrological model using the message passing interface

    Science.gov (United States)

    Wu, Yiping; Li, Tiejian; Sun, Liqun; Chen, Ji

    2013-01-01

    With the increasing knowledge about the natural processes, hydrological models such as the Soil and Water Assessment Tool (SWAT) are becoming larger and more complex with increasing computation time. Additionally, other procedures such as model calibration, which may require thousands of model iterations, can increase running time and thus further reduce rapid modeling and analysis. Using the widely-applied SWAT as an example, this study demonstrates how to parallelize a serial hydrological model in a Windows® environment using a parallel programing technology—Message Passing Interface (MPI). With a case study, we derived the optimal values for the two parameters (the number of processes and the corresponding percentage of work to be distributed to the master process) of the parallel SWAT (P-SWAT) on an ordinary personal computer and a work station. Our study indicates that model execution time can be reduced by 42%–70% (or a speedup of 1.74–3.36) using multiple processes (two to five) with a proper task-distribution scheme (between the master and slave processes). Although the computation time cost becomes lower with an increasing number of processes (from two to five), this enhancement becomes less due to the accompanied increase in demand for message passing procedures between the master and all slave processes. Our case study demonstrates that the P-SWAT with a five-process run may reach the maximum speedup, and the performance can be quite stable (fairly independent of a project size). Overall, the P-SWAT can help reduce the computation time substantially for an individual model run, manual and automatic calibration procedures, and optimization of best management practices. In particular, the parallelization method we used and the scheme for deriving the optimal parameters in this study can be valuable and easily applied to other hydrological or environmental models.

  10. 22 CFR 9b.8 - Term and renewal of Department of State press building passes.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Term and renewal of Department of State press... DEPARTMENT OF STATE PRESS BUILDING PASSES § 9b.8 Term and renewal of Department of State press building passes. (a) Department of State press building passes for U.S. citizens are issued with three...

  11. Affordances shape pass kick behavior in association football : effects of distance and social context

    NARCIS (Netherlands)

    Pepping, Gert-Jan; Heijmerikx, Johan; de Poel, Harjo J.

    2011-01-01

    A prerequisite for accurate passing in association football is that a player perceives the affordances, that is, the opportunities for action, of a given situation. The present study examined how affordances shape passing in association football by comparing the performance of pass-kicks in two task

  12. 40 CFR 205.160-6 - Passing or failing under SEA.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Passing or failing under SEA. 205.160... failing under SEA. (a) A failing vehicle is one whose measured noise level is in excess of the applicable... vehicles is less than or equal to the number in Column A, the sample passes. (c) Pass or failure of an...

  13. Affordances shape pass kick behavior in association football : effects of distance and social context

    NARCIS (Netherlands)

    Pepping, Gert-Jan; Heijmerikx, Johan; de Poel, Harjo J.

    2011-01-01

    A prerequisite for accurate passing in association football is that a player perceives the affordances, that is, the opportunities for action, of a given situation. The present study examined how affordances shape passing in association football by comparing the performance of pass-kicks in two task

  14. Shaping decisions in volleyball An ecological approach to decision-making in volleyball passing

    NARCIS (Netherlands)

    Barsingerhorn, Annemiek D.; Zaal, Frank T. J. M.; De Poel, Harjo J.; Pepping, Gert-Jan

    2013-01-01

    To extend research on decision-making in sport we addressed the choices volleyball-players are faced with in a simple volleyball pass-return task. We manipulated the distance that eight experienced volleyball players had to cover for successful ball passing, and mapped their passing technique (i.e.,

  15. Fabrication of nanofiber non-wovens on the melt blowing die with air by-passes

    OpenAIRE

    Chen Ting; Yang Kang; Wu Li-Li

    2016-01-01

    The air flow field of the melt blowing die with air by-passes is simulated. The results show that fibers fabricated on the die with air by-passes are much finer than those without air by-passes, which indicates an energy-saving approach to fabricating nanofibers on the melt blowing equipment.

  16. 33 CFR 80.835 - Point Au Fer, LA to Calcasieu Pass, LA.

    Science.gov (United States)

    2010-07-01

    ... Pass, LA. 80.835 Section 80.835 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND... to Calcasieu Pass, LA. (a) A line drawn from Point Au Fer to Atchafalaya Channel Light 34, to Point... inlets from the Gulf of Mexico between South Point and Calcasieu Pass except as otherwise described...

  17. 77 FR 1870 - Safety Zone; Matlacha Bridge Construction, Matlacha Pass, Matlacha, FL

    Science.gov (United States)

    2012-01-12

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Matlacha Bridge Construction, Matlacha Pass... establishing a temporary safety zone on the waters of Matlacha Pass in the vicinity of the Matlacha Bridge in... system at the Matlacha Bridge, thereby closing the Matlacha Pass channel to marine traffic....

  18. Getting Science Students to PASS-UIW: A Successful Collaboration between Students, Staff, and Faculty

    Science.gov (United States)

    Ariza, Cristina; Davis, Julian M.; Frye, Michael; Harmsen, Earl

    2011-01-01

    This article explores the reasons that Peer Assisted Study Sessions (PASS) at the University of the Incarnate Word (UIW), commonly called PASS-UIW, has been successful in science courses at the University. The intent is to provide information for other institutions to launch, evaluate, or improve their own programs. PASS-UIW is a student-led…

  19. 78 FR 72817 - Drawbridge Operation Regulation; Chef Menteur Pass, New Orleans, LA

    Science.gov (United States)

    2013-12-04

    ... SECURITY Coast Guard 33 CFR Part 117 Drawbridge Operation Regulation; Chef Menteur Pass, New Orleans, LA... across Chef Menteur Pass, mile 2.8, at New Orleans, Orleans Parish, Louisiana. The deviation is necessary... have a significant effect on these vessels. Vessels able to pass through the bridge in the...

  20. 78 FR 57372 - Northern Pass Transmission Line Project Environmental Impact Statement: Announcement of Change in...

    Science.gov (United States)

    2013-09-18

    ... Northern Pass Transmission Line Project Environmental Impact Statement: Announcement of Change in Public... amended Notice of Intent (NOI) to modify the scope of the Northern Pass Transmission Line Project... previously announced this change in public meeting location on both the Northern Pass EIS Web site at...

  1. 77 FR 20719 - Safety Zone; Matlacha Bridge Construction, Matlacha Pass, Matlacha, FL

    Science.gov (United States)

    2012-04-06

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Matlacha Bridge Construction, Matlacha Pass... establishing a temporary safety zone on the waters of Matlacha Pass in the vicinity of the Matlacha Bridge in... Matlacha Pass channel to marine traffic. The construction poses a danger to mariners located in...

  2. 20 CFR 416.2095 - Pass-along of Federal benefit increases.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 2 2010-04-01 2010-04-01 false Pass-along of Federal benefit increases. 416... Pass-along of Federal benefit increases. (a) General. This section and the four sections that follow describe the rules for passing along increases in the Federal SSI benefit to recipients of...

  3. 45 CFR 303.52 - Pass-through of incentives to political subdivisions.

    Science.gov (United States)

    2010-10-01

    ... 45 Public Welfare 2 2010-10-01 2010-10-01 false Pass-through of incentives to political..., DEPARTMENT OF HEALTH AND HUMAN SERVICES STANDARDS FOR PROGRAM OPERATIONS § 303.52 Pass-through of incentives... subdivisions as follows: (a) The State IV-D agency must develop a standard methodology for passing through...

  4. 75 FR 48278 - Defense Federal Acquisition Regulation Supplement; Excessive Pass-Through Charges

    Science.gov (United States)

    2010-08-10

    ... Regulation Supplement; Excessive Pass-Through Charges AGENCY: Defense Acquisition Regulations System... ensures that pass-through charges on contracts or subcontracts that are entered into for or on behalf of... required DoD to prescribe regulations to ensure that pass-through charges on contracts or subcontracts...

  5. 33 CFR 165.T08-290 - Safety Zone; Gulf of Mexico-Johns Pass, Florida.

    Science.gov (United States)

    2010-07-01

    ... Pass, Florida. 165.T08-290 Section 165.T08-290 Navigation and Navigable Waters COAST GUARD, DEPARTMENT... § 165.T08-290 Safety Zone; Gulf of Mexico—Johns Pass, Florida. (a) Regulated area. The Coast Guard is...'s Pass Bridge, that includes all the waters from surface to bottom, within a 100-yard radius of...

  6. 76 FR 56354 - Proposed Amendment of Class E Airspace; Anaktuvuk Pass, AK

    Science.gov (United States)

    2011-09-13

    ... Federal Aviation Administration 14 CFR Part 71 Proposed Amendment of Class E Airspace; Anaktuvuk Pass, AK...: This action proposes to revise Class E airspace at Anaktuvuk Pass, AK. The creation of two standard instrument approach procedures at the Anaktuvuk Pass Airport has made this action necessary to enhance...

  7. Fabrication of nanofiber non-wovens on the melt blowing die with air by-passes

    Directory of Open Access Journals (Sweden)

    Chen Ting

    2016-01-01

    Full Text Available The air flow field of the melt blowing die with air by-passes is simulated. The results show that fibers fabricated on the die with air by-passes are much finer than those without air by-passes, which indicates an energy-saving approach to fabricating nanofibers on the melt blowing equipment.

  8. Thermal effectiveness of multiple shell and tube pass TEMA E heat exchangers

    Energy Technology Data Exchange (ETDEWEB)

    Pignotti, A. (TECHNIT S.A., Buenos Aires (Argentina)); Tamborenea, P.I. (Fundacion Hermanos, Buenos Aires (Argentina))

    1988-02-01

    The thermal effectiveness of a TEMAE shell-and-tube heat exchanger, with one shell pass and an arbitrary number of tube passes, is determined under the usual simplifying assumptions of perfect transverse mixing of the shell fluid, no phase change, and temperature independence of the heat capacity rates and the heat transfer coefficient. A purely algebraic solution is obtained for the effectiveness as a functions of the heat capacity rate ratio and the number of heat transfer units. The case with M shell passes and N tube passes is easily expressed in terms of the single-shell-pass case.

  9. The effect of interruption probability in lattice model of two-lane traffic flow with passing

    Science.gov (United States)

    Peng, Guanghan

    2016-11-01

    A new lattice model is proposed by taking into account the interruption probability with passing for two-lane freeway. The effect of interruption probability with passing is investigated about the linear stability condition and the mKdV equation through linear stability analysis and nonlinear analysis, respectively. Furthermore, numerical simulation is carried out to study traffic phenomena resulted from the interruption probability with passing in two-lane system. The results show that the interruption probability with passing can improve the stability of traffic flow for low reaction coefficient while the interruption probability with passing can destroy the stability of traffic flow for high reaction coefficient on two-lane highway.

  10. A systematic review of the effectiveness of remediation interventions to improve NCLEX-RN pass rates.

    Science.gov (United States)

    Pennington, Tracy D; Spurlock, Darrell

    2010-09-01

    First-time NCLEX-RN pass rates are important measures of educational quality in prelicensure nursing education programs. Licensure pass rate problems has been the subject of countless nursing education articles and studies over the past several decades. To improve NCLEX-RN pass rates, remediation is often prescribed for students who have academic performance deficits. This article presents a systematic review of studies on remediation interventions and their effects on NCLEX-RN pass rates. Most studies of remediation and its effects on licensure pass rates are descriptive program evaluation reports. The overall quality of studies included in this review is uneven but generally low. Nursing education researchers should focus on conducting higher quality intervention studies in which the fidelity of remediation interventions can be examined. Viewing licensure pass rates from a process improvement perspective and accounting for pass rate variations could also change the nature of scholarship on this topic.

  11. Reciprocity on the hardwood: passing patterns among professional basketball players.

    Science.gov (United States)

    Willer, Robb; Sharkey, Amanda; Frey, Seth

    2012-01-01

    Past theory and research view reciprocal resource sharing as a fundamental building block of human societies. Most studies of reciprocity dynamics have focused on trading among individuals in laboratory settings. But if motivations to engage in these patterns of resource sharing are powerful, then we should observe forms of reciprocity even in highly structured group environments in which reciprocity does not clearly serve individual or group interests. To this end, we investigated whether patterns of reciprocity might emerge among teammates in professional basketball games. Using data from logs of National Basketball Association (NBA) games of the 2008-9 season, we estimated a series of conditional logistic regression models to test the impact of different factors on the probability that a given player would assist another player in scoring a basket. Our analysis found evidence for a direct reciprocity effect in which players who had "received" assists in the past tended to subsequently reciprocate their benefactors. Further, this tendency was time-dependent, with the probability of repayment highest soon after receiving an assist and declining as game time passed. We found no evidence for generalized reciprocity - a tendency to "pay forward" assists - and only very limited evidence for indirect reciprocity - a tendency to reward players who had sent others many assists. These findings highlight the power of reciprocity to shape human behavior, even in a setting characterized by extensive planning, division of labor, quick decision-making, and a focus on inter-group competition.

  12. Reciprocity on the hardwood: passing patterns among professional basketball players.

    Directory of Open Access Journals (Sweden)

    Robb Willer

    Full Text Available Past theory and research view reciprocal resource sharing as a fundamental building block of human societies. Most studies of reciprocity dynamics have focused on trading among individuals in laboratory settings. But if motivations to engage in these patterns of resource sharing are powerful, then we should observe forms of reciprocity even in highly structured group environments in which reciprocity does not clearly serve individual or group interests. To this end, we investigated whether patterns of reciprocity might emerge among teammates in professional basketball games. Using data from logs of National Basketball Association (NBA games of the 2008-9 season, we estimated a series of conditional logistic regression models to test the impact of different factors on the probability that a given player would assist another player in scoring a basket. Our analysis found evidence for a direct reciprocity effect in which players who had "received" assists in the past tended to subsequently reciprocate their benefactors. Further, this tendency was time-dependent, with the probability of repayment highest soon after receiving an assist and declining as game time passed. We found no evidence for generalized reciprocity - a tendency to "pay forward" assists - and only very limited evidence for indirect reciprocity - a tendency to reward players who had sent others many assists. These findings highlight the power of reciprocity to shape human behavior, even in a setting characterized by extensive planning, division of labor, quick decision-making, and a focus on inter-group competition.

  13. Is the mandibular nerve block passé?

    Science.gov (United States)

    Malamed, Stanley F

    2011-09-01

    Providing effective pain control is a critical part of dental treatment, yet achieving consistently reliable anesthesia in the mandible has proved elusive. The traditional inferior alveolar nerve block (IANB) has a high failure rate; for example, the failure rate in lateral incisors is 81 percent. As a consequence, new approaches and techniques have been developed. The purpose of this supplement to The Journal of the American Dental Association is to determine whether the mandibular nerve block has become passé. The high failure rate of the IANB can be frustrating for dentists and lead to discomfort for the patient during treatment. The reasons for this high failure rate include thickness of the cortical plate of bone in adults, thickness of the soft tissue at the injection site leading to increased needle deflection, the difficulty of locating the inferior alveolar nerve and the possibility of accessory innervation. Although the IANB can be unreliable, it is used commonly to provide mandibular anesthesia. Pain control is an essential part of dental treatment. Alternative injection techniques and devices that can help increase the success rate of mandibular anesthesia are available.

  14. Containing epidemic outbreaks by message-passing techniques

    CERN Document Server

    Altarelli, F; Dall'Asta, L; Wakeling, J R; Zecchina, R

    2013-01-01

    The problem of targeted network immunization can be defined as the one of finding a subset of nodes in a network to immunize or vaccinate in order to minimize a tradeoff between the cost of vaccination and the final (stationary) expected infection under a given epidemic model. Although computing the expected infection is a hard computational problem, simple and efficient mean-field approximations have been put forward in the literature in recent years. The optimization problem can be recast into a constrained one in which the constraints enforce local mean-field equations describing the average stationary state of the epidemic process. For a wide class of epidemic models, including the susceptible-infected-removed and the susceptible-infected-susceptible models, we define a message-passing approach to network immunization that allows us to study the statistical properties of epidemic outbreaks in the presence of immunized nodes as well as to find (nearly) optimal immunization sets for a given choice of parame...

  15. Single-pass memory system evaluation for multiprogramming workloads

    Science.gov (United States)

    Conte, Thomas M.; Hwu, Wen-Mei W.

    1990-01-01

    Modern memory systems are composed of levels of cache memories, a virtual memory system, and a backing store. Varying more than a few design parameters and measuring the performance of such systems has traditionally be constrained by the high cost of simulation. Models of cache performance recently introduced reduce the cost simulation but at the expense of accuracy of performance prediction. Stack-based methods predict performance accurately using one pass over the trace for all cache sizes, but these techniques have been limited to fully-associative organizations. This paper presents a stack-based method of evaluating the performance of cache memories using a recurrence/conflict model for the miss ratio. Unlike previous work, the performance of realistic cache designs, such as direct-mapped caches, are predicted by the method. The method also includes a new approach to the problem of the effects of multiprogramming. This new technique separates the characteristics of the individual program from that of the workload. The recurrence/conflict method is shown to be practical, general, and powerful by comparing its performance to that of a popular traditional cache simulator. The authors expect that the availability of such a tool will have a large impact on future architectural studies of memory systems.

  16. Generalized access control strategies for integrated services token passing systems

    Science.gov (United States)

    Pang, Joseph W. M.; Tobagi, Fouad A.; Boyd, Stephen

    1994-08-01

    The demand for integrated services local area networks is increasing at a rapid pace with the advent of many new and exciting applications: office and factory automation, distributed computing, and multimedia communications. To support these new applications, it is imperative to integrate traffic with diverse statistical characteristics and differing delay requirements on the same network. An attractive approach for integrating traffic has been adopted in two token passing local area network standards, the IEEE 802.4 token bus standard and FDDI. The idea is to control the transmissions of each station based on a distributed timing algorithm, so as to achieve the following goals: (1) to limit the token cycles so that time-critical traffic can be accommodated, and (2) to allocate pre-specified bandwidths to different stations when the network is overloaded. We have investigated the analysis and design of this protocol. In this paper, we generalize the transmission control algorithm used previously. The major advantages of the generalization over the original protocol are: (1) it provides a much expanded design space, (2) it guarantees convergent behavior, and (3) it gives meaningful insights into the dynamics of the basic control algorithm.

  17. Parallel imaging for first-pass myocardial perfusion.

    Science.gov (United States)

    Irwan, Roy; Lubbers, Daniël D; van der Vleuten, Pieter A; Kappert, Peter; Götte, Marco J W; Sijens, Paul E

    2007-06-01

    Two parallel imaging methods used for first-pass myocardial perfusion imaging were compared in terms of signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and image artifacts. One used adaptive Time-adaptive SENSitivity Encoding (TSENSE) and the other used GeneRalized Autocalibrating Partially Parallel Acquisition (GRAPPA), which are both applied to a gradient-echo sequence. Both methods were tested on 12 patients with coronary artery disease. The order of perfusion sequences was inverted in every other patient. Image acquisition was started during the administration of a contrast bolus followed by a 20-ml saline flush (3 ml/s), and the next perfusion was started at least 15 min thereafter using an identical bolus. An acceleration rate of 2 was used in both methods, and acquisition was performed during breath-holding. Significantly higher SNR, CNR and image quality were obtained with GRAPPA images than with TSENSE images. GRAPPA, however, did not yield a higher CNR when applied after the second bolus. GRAPPA perfusion imaging produced larger differences between subjects than did TSENSE. Compared to TSENSE, GRAPPA produced significantly better CNR on the first bolus. More consistent SNR and CNR were obtained from TSENSE images than from GRAPPA images, indicating that the diagnostic value of TSENSE may be better.

  18. A Privacy-Preserving NFC Mobile Pass for Transport Systems

    Directory of Open Access Journals (Sweden)

    Ghada Arfaoui

    2014-12-01

    Full Text Available The emergence of the NFC (Near Field Communication technology brings new capacities to the next generation of smartphones, but also new security and privacy challenges. Indeed through its contactless interactions with external entities, the smartphone of an individual will become an essential authentication tool for service providers such as transport operators. However, from the point of view of the user, carrying a part of the service through his smartphone could be a threat for his privacy. Indeed, an external attacker or the service provider himself could be tempted to track the actions of the user. In this paper, we propose a privacy-preserving contactless mobile service, in which a user’s identity cannot be linked to his actions when using the transport system. The security of our proposition relies on the combination of a secure element in the smartphone and on a privacy-enhancing cryptographic protocol based on a variant of group signatures. In addition, although a user should remain anonymous and his actions unlinkable in his daily journeys, we designed a technique for lifting his anonymity in extreme circumstances. In order to guarantee the usability of our solution, we implemented a prototype demonstrating that our solution meets the major functional requirements for real transport systems: namely that the mobile pass can be validated at a gate in less than 300 ms, and this even if the battery of the smartphone is exhausted.

  19. Algorithmic Verification of Single-Pass List Processing Programs

    CERN Document Server

    Alur, Rajeev

    2010-01-01

    We identify a class of programs manipulating lists of data items for which checking functional equivalence and pre/post verification conditions is decidable. Lists are modeled as data words, (unbounded) sequences of data values, tagged with symbols from a finite set, over a potentially infinite data domain that supports only the operations of equality and ordering. First, we introduce streaming data-word transducers that map input data words to output data words in a single left-to-right pass in linear time. The transducer uses a finite set of states, a finite set of variables ranging over data domain, and a finite set of variables ranging over data words. At every step, it can make decisions based on the next input symbol, updating its state, remembering the input data value in its data variables, and updating data-word variables by concatenating data-word variables and new symbols formed from data variables, while avoiding duplication. Second, we establish Pspace bounds for the problems of checking function...

  20. A message passing approach for general epidemic models

    CERN Document Server

    Karrer, Brian

    2010-01-01

    In most models of the spread of disease over contact networks it is assumed that the probabilities of disease transmission and recovery from disease are constant in time. In real life, however, this is far from true. In many diseases, for instance, recovery occurs at about the same time after infection for all individuals, rather than at a constant rate. In this paper, we study a generalized version of the SIR (susceptible-infected-recovered) model of epidemic disease that allows for arbitrary nonuniform distributions of transmission and recovery times. Standard differential equation approaches cannot be used for this generalized model, but we show that the problem can be reformulated as a time-dependent message passing calculation on the appropriate contact network. The calculation is exact on trees (i.e., loopless networks) or locally tree-like networks (such as random graphs) in the large system size limit. On non-tree-like networks we show that the calculation gives a rigorous bound on the size of disease...

  1. Stopping dynamics of ions passing through correlated honeycomb clusters

    Science.gov (United States)

    Balzer, Karsten; Schlünzen, Niclas; Bonitz, Michael

    2016-12-01

    A combined nonequilibrium Green functions-Ehrenfest dynamics approach is developed that allows for a time-dependent study of the energy loss of a charged particle penetrating a strongly correlated system at zero and finite temperatures. Numerical results are presented for finite inhomogeneous two-dimensional Fermi-Hubbard models, where the many-electron dynamics in the target are treated fully quantum mechanically and the motion of the projectile is treated classically. The simulations are based on the solution of the two-time Dyson (Keldysh-Kadanoff-Baym) equations using the second-order Born, third-order, and T -matrix approximations of the self-energy. As application, we consider protons and helium nuclei with a kinetic energy between 1 and 500 keV/u passing through planar fragments of the two-dimensional honeycomb lattice and, in particular, examine the influence of electron-electron correlations on the energy exchange between projectile and electron system. We investigate the time dependence of the projectile's kinetic energy (stopping power), the electron density, the double occupancy, and the photoemission spectrum. Finally, we show that, for a suitable choice of the Hubbard model parameters, the results for the stopping power are in fair agreement with ab initio simulations for particle irradiation of single-layer graphene.

  2. Message passing with a limited number of DMA byte counters

    Energy Technology Data Exchange (ETDEWEB)

    Blocksome, Michael (Rochester, MN); Chen, Dong (Croton on Hudson, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Kumar, Sameer (White Plains, NY); Parker, Jeffrey J. (Rochester, MN)

    2011-10-04

    A method for passing messages in a parallel computer system constructed as a plurality of compute nodes interconnected as a network where each compute node includes a DMA engine but includes only a limited number of byte counters for tracking a number of bytes that are sent or received by the DMA engine, where the byte counters may be used in shared counter or exclusive counter modes of operation. The method includes using rendezvous protocol, a source compute node deterministically sending a request to send (RTS) message with a single RTS descriptor using an exclusive injection counter to track both the RTS message and message data to be sent in association with the RTS message, to a destination compute node such that the RTS descriptor indicates to the destination compute node that the message data will be adaptively routed to the destination node. Using one DMA FIFO at the source compute node, the RTS descriptors are maintained for rendezvous messages destined for the destination compute node to ensure proper message data ordering thereat. Using a reception counter at a DMA engine, the destination compute node tracks reception of the RTS and associated message data and sends a clear to send (CTS) message to the source node in a rendezvous protocol form of a remote get to accept the RTS message and message data and processing the remote get (CTS) by the source compute node DMA engine to provide the message data to be sent.

  3. [VARIANT ANATOMY OF SPLENIC LIGAMENTS AND ARTERIES PASSING THROUGH THEM].

    Science.gov (United States)

    Gaivoronskiy, I V; Kotiv, B N; Alekseyev, V S; Nichiporuk, G I

    2015-01-01

    The research was performed on 15 non embalmed bodies and 32 abdominal complexes of adult individuals. The comparative study of variant anatomy of splenic ligaments and architectonics of arteries passing through them was carried out to substantiate the mobilization of splenopancreatic complex. Anatomical and angiographic restudied were carried out using preparation, morphometry, injection of gastric, pancreatic and splenic vascular bed with red lead suspension. It was established that the form and sizes of splenic ligaments and their interrelation with the branches of the splenic artery were variable. The minimal and maximal sizes of gastrolienal, phrenicosplenic and splenocolic ligaments differed 2-3 times. In most cases, spleen was fixed in abdominal cavity by many short ligaments. It was shown that architectonics and topography of main branches of spleen artery were determined by morphometric characteristics of the spleen proper and its ligaments. The knowledge of splenic ligament variant anatomy allows a new perspective to approach to substantiate different methods of the mobilization of spleno-pancreatic complex during surgical operations on organs of the upper part of the peritoneal cavity and organ-preserving surgery of the spleen.

  4. Single Pass Stripline Beam Position Monitor Design, Fabrication and Commissioning

    Directory of Open Access Journals (Sweden)

    McKinlay J.

    2012-10-01

    Full Text Available To monitor the position of the electron beam during transport from the Booster Synchrotron to the Storage Ring at the Australian Synchrotron, a stripline Beam Position Monitor (BPM has been designed, fabricated and installed in-house. The design was based on an existing stripline in the Booster and modified for the transfer line with a particular emphasis on ensuring the line impedance is properly matched to the detector system. The initial bench tests of a prototype stripline showed that the fabrication of the four individual striplines in the BPM was made precisely, each with a measured standing wave ratio (SWR of 1.8 at 500 MHz. Further optimization for impedance matching will be done for new stripline BPMs. The linearity and gain factor was measured with the detector system. The detector system that digitizes the signals is an Instrumentation Technologies Brilliance Single Pass [1]. The results show an error of 1 mm at an offset (from the electrical centre of 10 mm when a linear gain factor is assumed and an RMS noise of ~150 um that decreases to < 10 um with increasing signal intensity. The results were under our requirements for the transport line. The commissioning results of the stripline will also be presented showing a strong signal for an electron beam with an estimated integrated charge of ~50 nC with a position stability of 28 um (horizontal and 75 um (vertical.

  5. Characterizing Computation-Communication Overlap in Message-Passing Systems

    Energy Technology Data Exchange (ETDEWEB)

    David E. Bernholdt; Jarek Nieplocha; P. Sadayappan; Aniruddha G. Shet; Vinod Tipparaju

    2008-01-31

    Effective overlap of computation and communication is a well understood technique for latency hiding and can yield significant performance gains for applications on high-end computers. In this report, we describe an instrumentation framework developed for message-passing systems to characterize the degree of overlap of communication with computation in the execution of parallel applications. The inability to obtain precise time-stamps for pertinent communication events is a significant problem, and is addressed by generation of minimum and maximum bounds on achieved overlap. The overlap measures can aid application developers and system designers in investigating scalability issues. The approach has been used to instrument two MPI implementations as well as the ARMCI system. The implementation resides entirely within the communication library and thus integrates well with existing approaches that operate outside the library. The utility of the framework is demonstrated by analyzing communication-computation overlap for micro-benchmarks and the NAS benchmarks, and the insights obtained are used to modify the NAS SP benchmark, resulting in improved overlap.

  6. Performance Evaluation Tools for Message-Passing Parallel Problems

    Directory of Open Access Journals (Sweden)

    Wlodzimierz Funika

    1999-01-01

    Full Text Available The article presents a number of issues of designing and implementing performance evolution tools for message-passing parallel programs, eg. MPI and PVM. There is at number ofspecial techniques for investigating parallel programs, whose implementations are tools presented, A concept of performance observability is introduced. Although a number of interesting solutions of performance tools was developed in the course of last decade, there is a great demand for portable and integrated tools. Understanding the reason for this situation requires evaluating the state of art of existing tools, their advantages and drawbacks. Due to a complicated mechanism of interactions between a tool and operating system, computer architecture and application, evaluating the tool includes taking into account a large number of features. There is introduced a set of criteria, which enable a thorough evaluation of tools. based on the work of HPC standardizing organizations as well as the author's work. The second part of the article presents the review of features of the particular tools developed over last decade. The tools are being evaluated on the base of the criteria introduced. The features of the PARNAS performance tool project and its implementation are presented. The summary presents further avenues of inquiry in parallel performance evaluation tools.

  7. Assessing the efficacy of single-pass backpack electrofishing to characterize fish community structure

    Science.gov (United States)

    Meador, M.R.; McIntyre, J.P.; Pollock, K.H.

    2003-01-01

    Two-pass backpack electrofishing data collected as part of the U.S. Geological Survey's National Water-Quality Assessment Program were analyzed to assess the efficacy of single-pass backpack electrofishing. A two-capture removal model was used to estimate, within 10 river basins across the United States, proportional fish species richness from one-pass electrofishing and probabilities of detection for individual fish species. Mean estimated species richness from first-pass sampling (p??s1) ranged from 80.7% to 100% of estimated total species richness for each river basin, based on at least seven samples per basin. However, p??s1 values for individual sites ranged from 40% to 100% of estimated total species richness. Additional species unique to the second pass were collected in 50.3% of the samples. Of these, cyprinids and centrarchids were collected most frequently. Proportional fish species richness estimated for the first pass increased significantly with decreasing stream width for 1 of the 10 river basins. When used to calculate probabilities of detection of individual fish species, the removal model failed 48% of the time because the number of individuals of a species was greater in the second pass than in the first pass. Single-pass backpack electrofishing data alone may make it difficult to determine whether characterized fish community structure data are real or spurious. The two-pass removal model can be used to assess the effectiveness of sampling species richness with a single electrofishing pass. However, the two-pass removal model may have limited utility to determine probabilities of detection of individual species and, thus, limit the ability to assess the effectiveness of single-pass sampling to characterize species relative abundances. Multiple-pass (at least three passes) backpack electrofishing at a large number of sites may not be cost-effective as part of a standardized sampling protocol for large-geographic-scale studies. However, multiple-pass

  8. Double-pass ytterbium-doped fiber amplifier with high gain coefficient and low noise figure

    Institute of Scientific and Technical Information of China (English)

    Anting Wang(王安廷); Meishu Xing(邢美术); Guanghui Chen(陈光辉); Wenkui Yang(杨文奎); Hai Ming(明海); Jianping Xie(谢建平); Yunxia Wu(吴云霞)

    2003-01-01

    We have proposed and demonstrated a double-pass ytterbium-doped fiber amplifier using an optical circulator and a fiber Bragg grating as reflector. When the signal has passed through the ytterbium-doped fiber once, it reflects off a 0.2-nm passive fiber Bragg grating filter. This reduces amplified spontaneous emission (ASE) noise from the first pass. The input signal light is amplified both forward and backward through ytterbium-doped fiber. With this double-pass configuration, 1053.15-nm unsaturated signal gain of 28 dB, gain coefficient of 1.1 dB/mW, and noise figure of less than 4 dB are achieved at 977-nm pump power of 68 mW. It is also found that this double-pass configure provides enhancing gain coefficient and improving noise figure by comparison with single-pass configuration.

  9. Design of UWB Band-pass Filters with GPS Band Rejection

    Institute of Scientific and Technical Information of China (English)

    Seung-back JUNG; Seung-in YANG

    2010-01-01

    This paper presents a compact Ultra-Wideband (UWB)band-pass filter using a high-pass filter and a low-pass one,and the resonator with Iumped elements.The structure of our proposed bandpass filter is very simple and the Defected Ground Structure (DGS) structure is used to get the low-pass filter characteristics.This proposed band-pass filter can be much smaller than a cascaded type filter.As a result of simulation,the insertion loss is less than 0.3 dB throughout the pass-band of 2.2 GHz~10.6 GHz,while the return loss is more than 18 dB.And it has rejection level of 36 dB at GPS band.

  10. The thermal performance of the two-pass, two-glass-cover solar air heater

    Energy Technology Data Exchange (ETDEWEB)

    Persad, P.; Sateunanathan, S.

    1983-08-01

    Analytic models are developed for the performance prediction of a two-glass-cover solar air heater operated in both the single-pass and two-pass modes. It is shown that the two-pass mode of operation is superior to the single-pass mode of operation over the range of collector inlet temperatures considered. This is seen to be mainly due to the fact that, in the two-pass mode of operation, the outer glass cover is cooled by the working fluid, thereby reducing the top losses. It is also shown that the performance in the two-pass mode of operation is independent of length, over the range of collector lengths considered, and that a critical plate spacing, dependent on the temperature level of operation of the collector, is indicated. Predicted values of performance are in good agreement with experimental results.

  11. Which-pass information in the double-slit experiment of diatomic molecules

    Energy Technology Data Exchange (ETDEWEB)

    Ueda, Kiyoshi, E-mail: ueda@tagen.tohoku.ac.j [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan)

    2010-02-01

    Analogy between the double-slit experiment in quantum optics and the photoelectron emission from diatoms is discussed in the light of availabilities of which-pass information and quantum eraser. The availability of which-pass information and the degree of the predictability may be determined by the intrinsic molecular processes involved, whereas the erasing the which-pass information relies on the observation.

  12. The eel ladders of the double slot pass Geesthacht; Aalleitern am Doppelschlitzpass Geesthacht

    Energy Technology Data Exchange (ETDEWEB)

    Adam, Beate [Institut fuer angewandte Oekologie, Kirtorf-Wahlen (Germany); Neumann, Christof [Knabe Enders Duehrkop Ingenieure GmbH, Hamburg (Germany)

    2012-07-01

    To facilitate the upstream migration of glass eels, four eel ladders were installed within and next to the fish pass at the Geesthacht dam. Similar to other fish pass construction types it was necessary to ensure that the ladders could be both detected and passed by the juvenile eels. A custom built monitoring station will be used to guarantee the correct functioning of the eel ladders and subsequently document the eel migration from the beginning of the next season. (orig.)

  13. Regional Sediment Management (RSM) Assessment of Longboat Pass, Manatee County, FL

    Science.gov (United States)

    2016-06-01

    Pass , Manatee County, FL by Kelly R. Legault PURPOSE: This Coastal and Hydraulics Engineering Technical Note (CHETN) describes the history of...ebb shoal morphology at Longboat Pass , Manatee County, FL, based on a review of the history and the recent inlet management studies for proposed...navigational dredging of the Pass . The study area is located on the southwest Gulf of Mexico coast of Florida (Figure 1). The goals of the study were to

  14. Study on Optimizing of Ball Passing Strategy and Role Switching Mechanism for Robot Soccer

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    A new ball passing strategy for robot soccer is proposed in this paper. With introduce of a new algorithm on ball passing, the optimum strategy is confirmed to be more efficient and exact when passing a ball. Questions of role switching in multi-intelligent agent cooperation in robot soccer are described based on Generalized Stochastic Petri-Net (GSPN). Results of computer simulation have confirmed the feasibility and efficiency of above Petri-net method.

  15. Intel NX to PVM 3.2 message passing conversion library

    Science.gov (United States)

    Arthur, Trey; Nelson, Michael L.

    1993-01-01

    NASA Langley Research Center has developed a library that allows Intel NX message passing codes to be executed under the more popular and widely supported Parallel Virtual Machine (PVM) message passing library. PVM was developed at Oak Ridge National Labs and has become the defacto standard for message passing. This library will allow the many programs that were developed on the Intel iPSC/860 or Intel Paragon in a Single Program Multiple Data (SPMD) design to be ported to the numerous architectures that PVM (version 3.2) supports. Also, the library adds global operations capability to PVM. A familiarity with Intel NX and PVM message passing is assumed.

  16. Message passing performance of Intel Paragon, IBM SP1 and Cray T3D using PVM

    Energy Technology Data Exchange (ETDEWEB)

    Manke, J.W.; Patterson, J.C. [Boeing Computer Services, Seattle, WA (United States)

    1995-12-01

    For distributed applications on MPP machinse, message passing performance is a critical factor in the overall speed and scalability of the application. This is particularly true when all-to-all communication between nodes is required. In this study we measured the message passing performance of our PVM implementation of an all-to-all communication method called recursive doubling. The measurements were done on an Intel Paragon, IBM SP1 and CRAY T3D. Using a model of message passing times for recursive doubling, we developed several measures that can be used to compare the message passing performance of MPP machines.

  17. Forty-Four Pass Fibre Optic Loop for Improving the Sensitivity of Surface Plasmon Resonance Sensors

    CERN Document Server

    Su, Chin B

    2007-01-01

    A forty-four pass fibre optic surface plasmon resonance sensor that enhances detection sensitivity according to the number of passes is demonstrated for the first time. The technique employs a fibre optic recirculation loop that passes the detection spot forty- four times, thus enhancing sensitivity by a factor of forty-four. Presently, the total number of passes is limited by the onset of lasing action of the recirculation loop. This technique offers a significant sensitivity improvement for various types of plasmon resonance sensors that may be used in chemical and biomolecule detections.

  18. 22 CFR 9b.5 - Temporary Department of State press building passes.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Temporary Department of State press building... OF STATE PRESS BUILDING PASSES § 9b.5 Temporary Department of State press building passes. A media... of State may make arrangements with the Office of Press Relations for the issuance of a...

  19. Catalytic reactor for promoting a chemical reaction on a fluid passing therethrough

    Science.gov (United States)

    Roychoudhury, Subir (Inventor); Pfefferle, William C. (Inventor)

    2001-01-01

    A catalytic reactor with an auxiliary heating structure for raising the temperature of a fluid passing therethrough whereby the catalytic reaction is promoted. The invention is a apparatus employing multiple electrical heating elements electrically isolated from one another by insulators that are an integral part of the flow path. The invention provides step heating of a fluid as the fluid passes through the reactor.

  20. 9 CFR 315.1 - Carcasses and parts passed for cooking; rendering into lard or tallow.

    Science.gov (United States)

    2010-01-01

    ...; rendering into lard or tallow. 315.1 Section 315.1 Animals and Animal Products FOOD SAFETY AND INSPECTION... PARTS PASSED FOR COOKING § 315.1 Carcasses and parts passed for cooking; rendering into lard or tallow... subchapter or rendered into tallow, provided such rendering is done in the following manner: (a) When...

  1. 78 FR 13747 - Safety Advisory 2013-01; Passing Stop Signals Protecting Movable Bridges

    Science.gov (United States)

    2013-02-28

    ... Federal Railroad Administration Safety Advisory 2013-01; Passing Stop Signals Protecting Movable Bridges... secured before permitting a train to pass a signal that is displaying a stop indication and protecting a... Corporation mixed freight train with two locomotives and 82 freight cars, including 51 hazardous materials...

  2. 42 CFR 419.64 - Transitional pass-through payments: Drugs and biologicals.

    Science.gov (United States)

    2010-10-01

    ... under section 1842(o) of the Social Security Act, minus the portion of the APC payment amount that CMS... biologicals. (a) Eligibility for pass-through payment. CMS makes a transitional pass-through payment for the... was first payable as an outpatient hospital service after December 31, 1996. (ii) CMS has...

  3. Impact of Online Summer Mathematics Bridge Program on Placement Scores and Pass Rates

    Science.gov (United States)

    Frost, Jodi L.; Dreher, J. P.

    2017-01-01

    An online four-week summer mathematics bridge program was implemented at a Midwest university with historically low pass rates in College Algebra and Remedial Mathematics. Students who completed the four week program significantly increased their mathematics placement exam scores. These students also had a higher pass rate in their initial college…

  4. PASS-THROUGH FREIGHT MODELING AT THE STATEWIDE AND METROPOLITAN LEVEL

    Directory of Open Access Journals (Sweden)

    Michael D. Anderson

    2014-03-01

    Full Text Available The ability to determine the volumes of freight (specifically trucks passing through a state or metropolitan area is difficult to determine/forecast because transportation professionals have no direct survey mechanism to collect this data. This paper documents various procedures developed to utilize the Freight Analysis Framework Version 2 Database to determine the number of trucks passing through the entire state and an urban area in Alabama. The procedures developed in this research focus on national level pass through data, trips from one state to another that pass through a state only because of that state’s location; pass through from a port of entry to the country where an urbanized area is located on a major corridor; and statewide level through trip data, trips from one part of a state to another that pass through an urbanized area because of its geographic location. The need for, and application of, the pass through freight forecasting is evident in the transportation planning models each metropolitan area and state are expected to develop and maintain for evaluating transportation projects. The ability to accurately forecast the pass through freight movements will benefit transportation planners by identifying freight volumes that must be accommodated by existing and proposed infrastructure, but for which the state or metropolitan area has no direct method to survey.

  5. Examining the Effects of PASS Cognitive Processes on Chinese Reading Accuracy and Fluency

    Science.gov (United States)

    Wang, Xiaochen; Georgiou, George K.; Das, J. P.

    2012-01-01

    The purpose of this study was to examine the contribution of PASS (Planning, Attention, Simultaneous, and Successive) processes to Chinese reading accuracy and fluency. One-hundred-forty Grade 3 to 5 Mandarin-speaking children were assessed on measures of PASS processes, phonological awareness, and orthographic knowledge. A year later they were…

  6. Unexplained factors and their effects on second pass R-squared’s

    NARCIS (Netherlands)

    Kleibergen, F.; Zhan, Z.

    2015-01-01

    We construct the large sample distributions of the OLS and GLS R2R2’s of the second pass regression of the Fama and MacBeth (1973) two pass procedure when the observed proxy factors are minorly correlated with the true unobserved factors. This implies an unexplained factor structure in the first pas

  7. Unexplained factors and their effects on second pass R-squared's and t-tests

    NARCIS (Netherlands)

    Kleibergen, F.; Zhan, Z.

    2013-01-01

    We construct the large sample distributions of the OLS and GLS R2’s of the second pass regression of the Fama-MacBeth (1973) two pass procedure when the observed proxy factors are minorly correlated with the true unobserved factors. The small correlation implies a sizeable unexplained factor structu

  8. Reading Comprehension in University Students: Relevance of PASS Theory of Intelligence

    Science.gov (United States)

    Georgiou, George K.; Das, J. P.

    2014-01-01

    We examined how Planning, Attention, Simultaneous and Successive (PASS) processes predict reading comprehension in a sample of university students (Study 1) and what PASS processes distinguish adults with and without reading difficulties (Study 2). In Study 1, 128 university students were tested on Das-Naglieri Cognitive Assessment System, reading…

  9. 75 FR 8327 - Golden Pass Pipeline LLC; Notice of Request Under Blanket Authorization

    Science.gov (United States)

    2010-02-24

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Golden Pass Pipeline LLC; Notice of Request Under Blanket Authorization February 17, 2010. Take notice that on October 29, 2009, Golden Pass Pipeline, LLC (GPPL), filed in...

  10. The effects of the Dutch museum pass on museum visits and museum revenues

    NARCIS (Netherlands)

    van der Werff, S.; Koopmans, C.; Boyer, C.

    2014-01-01

    The Dutch museum pass gives unlimited access for a year to most major Dutch museums and around the half of all Dutch museums for a fixed fee. The fee revenues are distributed among participating museums in proportion to the amount of visits by pass holders and their ticket prices. In this paper, it

  11. A New Place to Go on the Great Wall——Sightseeing at Juyongguan Pass

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    THE Great Wall,a symbol of thewisdom of ancient laboring Chinese,totals 6,700 kilometers in length,runningfrom Jiayuguan Pass in northwest China toShanhaiguan Pass in the northeast.Whatwas once a bastion of defense is now a

  12. Examining the Effects of PASS Cognitive Processes on Chinese Reading Accuracy and Fluency

    Science.gov (United States)

    Wang, Xiaochen; Georgiou, George K.; Das, J. P.

    2012-01-01

    The purpose of this study was to examine the contribution of PASS (Planning, Attention, Simultaneous, and Successive) processes to Chinese reading accuracy and fluency. One-hundred-forty Grade 3 to 5 Mandarin-speaking children were assessed on measures of PASS processes, phonological awareness, and orthographic knowledge. A year later they were…

  13. A Hoare-Like Logic of Asserted Single-Pass Instruction Sequences

    NARCIS (Netherlands)

    Bergstra, J.A.; Middelburg, C.A.

    2016-01-01

    We present a formal system for proving the partial correctness of a single-pass instruction sequence as considered in program algebra by decomposition into proofs of the partial correctness of segments of the single-pass instruction sequence concerned. The system is similar to Hoare logics, but

  14. Multi-pass 1.9 um Tm:YLF slab laser pump source

    CSIR Research Space (South Africa)

    Strauss, HJ

    2010-09-01

    Full Text Available A novel multi-pass Tm: YLF laser was demonstrated with an improvement in efficiency, footprint and cost over a two diode stack pumped, single pass system. 100 W of output power from 261 W of incident diode pump power with a slope efficiency of 44...

  15. Behavioral Coaching to Improve Offensive Line Pass-Blocking Skills of High School Football Athletes

    Science.gov (United States)

    Stokes, John V.; Luiselli, James K.; Reed, Derek D.; Fleming, Richard K.

    2010-01-01

    We evaluated several behavioral coaching procedures for improving offensive line pass-blocking skills with 5 high school varsity football players. Pass blocking was measured during practice drills and games, and our intervention included descriptive feedback with and without video feedback and teaching with acoustical guidance (TAG). Intervention…

  16. Is a more stable exchange rate associated with reduced exchange rate pass-through?

    OpenAIRE

    2007-01-01

    Pass-through from the nominal effective exchange rate to import prices is modelled within a regime-switching environment. Evidence suggests that exchange rate pass through can be characterised as regime-specific where the probability of switching between regimes is influenced by the extent of exchange rate volatility.

  17. 26 CFR 20.2056(b)-4 - Marital deduction; valuation of interest passing to surviving spouse.

    Science.gov (United States)

    2010-04-01

    ... passing to surviving spouse. 20.2056(b)-4 Section 20.2056(b)-4 Internal Revenue INTERNAL REVENUE SERVICE... surviving spouse. (a) In general. The value, for the purpose of the marital deduction, of any deductible interest which passed from the decedent to his surviving spouse is to be determined as of the date of...

  18. South Africa?s Increased Matriculation Passes: What Skunks behind the Rose?

    Science.gov (United States)

    Monyooe, Lebusa; Tjatji, Martin; Mosese, Eulenda

    2014-01-01

    This article argues that the exponential increases in the Grade 12 (Matriculation) passes post 1994 do not necessarily translate to quality because of the low performance norms and standards set for passing Grade 12. It further calls for a serious reflection and interrogation of existing policies on performance, benchmarks, teacher education…

  19. 14 CFR 61.35 - Knowledge test: Prerequisites and passing grades.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Knowledge test: Prerequisites and passing....35 Knowledge test: Prerequisites and passing grades. (a) An applicant for a knowledge test must have... part for the certificate or rating sought and is prepared for the knowledge test; and (2)...

  20. Audibility of high Q-factor all-pass components in HRTFs

    DEFF Research Database (Denmark)

    Toledo, Daniela; Møller, Henrik

    2008-01-01

    Head-related transfer functions (HRTFs) can be decomposed into minimum phase, linear phase and all-pass components.  It is known that low Q-factor all-pass sections in HRTFs are audible as lateral shifts when the interaural group delay at low frequencies exceeds 30usec.  The goal of our investiga...

  1. 19 CFR 4.1 - Boarding of vessels; cutter and dock passes.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Boarding of vessels; cutter and dock passes. 4.1... vessels; cutter and dock passes. (a) Every vessel arriving at a Customs port will be subject to such... charge until the vessel has been properly inspected by Customs and brought into the dock or anchorage at...

  2. Zenith Pass Problem of Inter-satellite Linkage Antenna Based on Program Guidance Method

    Institute of Scientific and Technical Information of China (English)

    Zhai Kun; Yang Di

    2008-01-01

    While adopting an elevation-over-azimuth architecture by an inter-satellite linkage antenna of a user satellite, a zenith pass problem always occurs when the antenna is tracing the tracking and data relay satellite (TDRS). This paper deals with this problem by way of,firstly, introducing movement laws of the inter-satellite linkage to predict the movement of the user satellite antenna followed by analyzing the potential pass moment and the actual one of the zenith pass in detail. A number of specific orbit altitudes for the user satellite that can remove the blindness zone are obtained. Finally, on the base of the predicted results from the movement laws of the inter-satellite linkage, the zenith pass tracing strategies for the user satellite antenna are designed under the program guidance using a trajectory preprocessor. Simulations have confirmed the reasonability and feasibility of the strategies in dealing with the zenith pass problem.

  3. Convergent and Correct Message Passing Schemes for Optimization Problems over Graphical Models

    CERN Document Server

    Ruozzi, Nicholas

    2010-01-01

    The max-product algorithm, which attempts to compute the most probable assignment (MAP) of a given probability distribution, has recently found applications in quadratic minimization and combinatorial optimization. Unfortunately, the max-product algorithm is not guaranteed to converge and, even if it does, is not guaranteed to produce the MAP assignment. In this work, we provide a simple derivation of a new family of message passing algorithms. We first show how to arrive at this general message passing scheme by "splitting" the factors of our graphical model and then we demonstrate that this construction can be extended beyond integral splitting. We prove that, for any objective function which attains its maximum value over its domain, this new family of message passing algorithms always contains a message passing scheme that guarantees correctness upon convergence to a unique estimate. We then adopt a serial message passing schedule and prove that, under mild assumptions, such a schedule guarantees the conv...

  4. Medicaid Program; The Use of New or Increased Pass-Through Payments in Medicaid Managed Care Delivery Systems. Final rule.

    Science.gov (United States)

    2017-01-18

    This rule finalizes changes to the pass-through payment transition periods and the maximum amount of pass-through payments permitted annually during the transition periods under Medicaid managed care contract(s) and rate certification(s). This final rule prevents increases in pass-through payments and the addition of new pass-through payments beyond those in place when the pass-through payment transition periods were established, in the final Medicaid managed care regulations effective July 5, 2016.

  5. A COMPARATIVE STUDY RELATING PASS BETWEEN MALE AND FEMALE BASKETBALL PLAYERS

    Directory of Open Access Journals (Sweden)

    Antonios THEOHAROPOULOS

    2010-04-01

    Full Text Available The main goal of this research is to examine the importance of different kind of passes through their frequency of appearance and success that male and female basketball players execute in Greek championships.The sample consisted of male and female teams of Thessaloniki - Greece. The 1st group consisted of male teams (18 from different divisions while the 2nd group consisted of female teams (10. Data collection was based on personal observation by a research team, who registries the kind of passes that took place either from the sampleteam or the opposite teams. The passes that were registered are: behind the back, chest, overhead, push, hand with hand, bounce and baseball pass. The analysis of variance (Anova in types of passes was formed, based on the factor “sex” (male-female. Specifically the comparisons were made between: a the total number of eachpass b their successful number c their frequency of appearance d and their total successful percentage. The results indicate that statistically significant differences exist between the two sexes, concerning the total number, the successful number and the percentages of success for the most used passes in Greek basketball. The analysis indicates that male and female basketball players tend to use different kind of passes during activity.

  6. Investigation of the effects of sleeper-passing impacts on the high-speed train

    Science.gov (United States)

    Wu, Xingwen; Cai, Wubin; Chi, Maoru; Wei, Lai; Shi, Huailong; Zhu, Minhao

    2015-12-01

    The sleeper-passing impact has always been considered negligible in normal conditions, while the experimental data obtained from a High-speed train in a cold weather expressed significant sleeper-passing impacts on the axle box, bogie frame and car body. Therefore, in this study, a vertical coupled vehicle/track dynamic model was developed to investigate the sleeper-passing impacts and its effects on the dynamic performance of the high-speed train. In the model, the dynamic model of vehicle is established with 10 degrees of freedom. The track model is formulated with two rails supported on the discrete supports through the finite element method. The contact forces between the wheel and rail are estimated using the non-linear Hertz contact theory. The parametric studies are conducted to analyse effects of both the vehicle speeds and the discrete support stiffness on the sleeper-passing impacts. The results show that the sleeper-passing impacts become extremely significant with the increased support stiffness of track, especially when the frequencies of sleeper-passing impacts approach to the resonance frequencies of wheel/track system. The damping of primary suspension can effectively lower the magnitude of impacts in the resonance speed ranges, but has little effect on other speed ranges. Finally, a more comprehensively coupled vehicle/track dynamic model integrating with a flexible wheel set is developed to discuss the sleeper-passing-induced flexible vibration of wheel set.

  7. Do Tele-Operators Learn to Better Judge Whether a Robot Can Pass Through an Aperture?

    Science.gov (United States)

    Schmidlin, Elizabeth A; Jones, Keith S

    2016-03-01

    This experiment examined whether tele-operators learn to better judge a robot's ability to pass through an aperture, hereafter referred to as pass-ability judgments, and detailed the nature of such learning. Jones, Johnson, and Schmidlin reported that tele-operators' pass-ability judgments did not improve over the course of their experiment, which was surprising. In each of seven blocks, tele-operators made pass-ability judgments about 10 apertures whose width varied. During each trial, participants drove the robot toward the aperture, answered yes or no to whether it could pass through that aperture, and then attempted to drive the robot through the aperture. Pass-ability judgments were analyzed in terms of percentage correct and absolute thresholds; the latter mimicked how Jones et al. analyzed their data. Learning was revealed when judgments were analyzed in terms of percentage correct and not when analyzed in terms of absolute thresholds. Further analyses revealed that tele-operators only improved their pass-ability judgments for impassable apertures, and tele-operators' perceptual sensitivity and response bias changed over the course of the experiment. The percentage correct-based analyses revealed that tele-operators learned to make better pass-ability judgments. Jones et al.'s decision to analyze their data in terms of absolute thresholds obscured learning. The present results suggested that researchers should employ percentage correct when studying learning in this domain, training protocols should focus on improving tele-operators' abilities to judge the pass-ability of impassable apertures, and tele-operators truly learned to better discriminate passable and impassable apertures. © 2015, Human Factors and Ergonomics Society.

  8. Pass Completion Rate and Match Outcome at the World Cup in Brazil in 2014

    Directory of Open Access Journals (Sweden)

    Król Michał

    2017-03-01

    Full Text Available Introduction. Having possession of the ball makes it possible for the players of a team to undertake a greater number of actions that can help the team win the match. The aim of the current study was to determine the number and completion rate of passes made from different distances in relation to percentage ball possession and the outcome of the match in the group stage of the FIFA World Cup held in Brazil in 2014. Material and methods. The study included 32 teams who participated in the final tournament. The performance of 266 players (682 observations who played 48 matches in the group stage was examined. Only players who took part in the entire match were included in the research, and goal-keepers were excluded. The data used in the study, which had been recorded by means of the Castrol Performance Index system, were obtained from the FIFA official website. The total number of passes and the percentage of completed passes were analysed, which were classified as short, medium, and long, in relation to the team’s percentage possession of the ball (over and below 50% and the outcome of the match (win, loss, or draw. Results. Out of the three types of passes which were examined in the study, teams playing in the World Cup in Brazil most often made medium passes. The number of these passes was the highest in matches won. These matches were also characterised by a significantly higher percentage of completed long passes. Conclusions. Players from teams who were in possession of the ball more than 50% of the time performed a higher number of all types of passes, regardless of the outcome of the match. The completion rate for these players was significantly higher only for short and medium passes.

  9. What is the chance all your trainees will pass the next Fellowship exam: A statistician's view.

    Science.gov (United States)

    Chu, Kevin H; Mahmoud, Ibrahim; Brown, Anthony Ft

    2017-02-01

    Your department has had a good track record over many years for preparing trainees to successfully sit for the ACEM Fellowship exam. On average the pass rate for your trainees is over 80%. Then, to your dismay, suddenly only two of five of your trainees pass the latest Fellowship exam. Does this anomaly necessitate an urgent review of your department's training programme, or is it just a statistical quirk? Let us suppose you can prepare candidates so that they all have at least an 80% chance of passing. The probability that all five candidates would have passed is 32.8% (or 0.8(5) ) based on the multiplication rule of probability for independent events. The probability that only two of five passed is 5.1% (or 10 × 0.8(2) × 0.2(3) ) based on the binomial distribution, which is a probability distribution analogous to the normal distribution. The construction of the binomial distribution depends on two parameters: (i) number of candidates sitting ('n'), and (ii) probability of passing for any individual candidate ('P'). The distribution gives the probability that 'x' number of individuals will pass when 'n' number of individuals sit. Thus despite an 80% pass rate historically, the probability that only two of five candidates will pass is not negligible at 5.1%. It is an anomaly, which we may choose not to act on unless it is recurrent, noting it will be expected to occur naturally about one time out of 20. The real challenge is to maintain or increase that individual probability at 80% or higher.

  10. Static thermo-optic instability in double-pass fiber amplifiers

    DEFF Research Database (Denmark)

    Lægsgaard, Jesper

    2016-01-01

    A coupled-mode formalism, earlier used to describe transverse mode instabilities in single-pass optical fiber amplifiers, is extended to the case of double-pass amplifiers. Contrary to the single-pass case, it is shown that the thermo-optic nonlinearity can couple light at the same frequency...... between the LP01 and LP11 modes, leading to a static deformation of the output beam profile. This novel phenomenon is caused by the interaction of light propagating in either direction with thermo-optic index perturbations caused by light propagating in the opposite direction. The threshold power...

  11. Survival Rates of Juvenile Salmonids Passing Through the Bonneville Dam and Spillway in 2008

    Energy Technology Data Exchange (ETDEWEB)

    Ploskey, Gene R.; Weiland, Mark A.; Faber, Derrek M.; Deng, Zhiqun; Johnson, Gary E.; Hughes, James S.; Zimmerman, Shon A.; Monter, Tyrell J.; Cushing, Aaron W.; Wilberding, Matthew C.; Durham, Robin E.; Townsend, R. L.; Skalski, J. R.; Buchanan, Rebecca A.; Kim, Jina; Fischer, Eric S.; Meyer, Matthew M.; McComas, Roy L.; Everett, Jason

    2009-12-28

    This report describes a 2008 acoustic telemetry survival study conducted by the Pacific Northwest National Laboratory for the Portland District of the U.S. Army Corps of Engineers. The study estimated the survival of juvenile Chinook salmon and steelhead passing Bonneville Dam (BON) and its spillway. Of particular interest was the relative survival of smolts detected passing through end spill bays 1-3 and 16-18, which had deep flow deflectors immediately downstream of spill gates, versus survival of smolts passing middle spill bays 4-15, which had shallow flow deflectors.

  12. A new branch of mountain pass solutions for the choreographical 3-body problem

    CERN Document Server

    Arioli, G; Terracini, S

    2005-01-01

    We prove the existence of a new branch of solutions of Mountain Pass type for the periodic 3-body problem with choreographical constraint. At first we describe the variational structure of the action functional associated to the choreographical three body problem in R^3. In the second part, using on a bisection algorithm, we provide a numerical non-rigorous solution of Mountain Pass type for this problem in a rotating frame with angular velocity 1.5. The last step consists in the rigorous computer-assisted proof of the existence of a full branch of solutions for the problem starting from the Mountain Pass solution detected numerically.

  13. Pressure drop and mass transfer in two-pass ribbed channels

    Science.gov (United States)

    Chandra, P. R.; Han, J. C.

    1989-01-01

    The combined effects of the sharp 180-deg turn and of the rib configuration on the pressure drop and mass transfer characteristics in a two-pass square channel with a pair of opposite rib-roughened walls (to simulate turbine airfoil cooling passages) were determined for a Reynolds number range of 10,000-60,000. Heat transfer enhancements were compared for the first pass and for the two-pass channel with the sharp 180-deg turn. Correlations for the fully-developed friction factors and loss coefficients were obtained.

  14. Benchmarking the gamma pass score using ArcCHECK for routine dosimetric QA of VMAT plans

    Science.gov (United States)

    Arumugam, Sankar; Young, Tony; Xing, Aitang; Thwaites, David; Holloway, Lois

    2015-01-01

    A minimum expected gamma (γ) pass rate for VMAT plan verification using ArcCHECK was established based on the RTTQA, TGI 19 test cases and 10 clinical plans with varying levels of complexity. The impact of the 'Measurement Uncertainty' parameter as available in the ArcCHECK software on γ pass rate was studied for both global and local γ analysis. Our results show that excluding measurement uncertainty adds tighter tolerance in local γ comparison. From the verification of our benchmark cases we established minimum expected γ pass rates of 85% and 88% for 2%/2mm global and 3%/3mm local tolerance criteria.

  15. By-Pass Diode Temperature Tests of a Solar Array Coupon under Space Thermal Environment Conditions

    Science.gov (United States)

    Wright, Kenneth H.; Schneider, Todd A.; Vaughn, Jason A.; Hoang, Bao; Wong, Frankie; Wu, Gordon

    2016-01-01

    By-Pass diodes are a key design feature of solar arrays and system design must be robust against local heating, especially with implementation of larger solar cells. By-Pass diode testing was performed to aid thermal model development for use in future array designs that utilize larger cell sizes that result in higher string currents. Testing was performed on a 56-cell Advanced Triple Junction solar array coupon provided by SSL. Test conditions were vacuum with cold array backside using discrete by-pass diode current steps of 0.25 A ranging from 0 A to 2.0 A.

  16. Spherical Refractive Correction With an Electro-Optical Liquid Lens in a Double-Pass System

    Science.gov (United States)

    Sanàbria, F.; Díaz-Doutón, F.; Aldaba, M.; Pujol, J.

    2013-09-01

    In this study we show a novel double-pass configuration to correct the spherical refractive error by means of an electro-optical liquid lens.The proposed method enables spherical correction in the -12 D to +7 D range without movable parts using an electro-optical liquid lens.We have measured the optical performance of the spherical corrector in terms of power, pupil size and optical quality verifying that it fitsthe requirements to be applied to a double-pass system. We have also evaluated the performance of the proposed method in patients bycomparison with a conventional double-pass system using a Badal optometer.

  17. The validity of high-pass angular spectrum filter in solid immersion lens system

    Institute of Scientific and Technical Information of China (English)

    Zheng Chong-Wei; Dai Yu-Xing

    2005-01-01

    The focal field of a solid immersion lens (SIL) system with a high-pass angular spectrum filter is calculated by using a vector method. Numerical results show that for a radially (azimuthally) polarized input field, a high-pass angular spectrum filter can reduce the light-spot (dark-spot) size of the SIL system. For a linearly polarized input field,however, the focal field cannot be optimized and the optical storage density of the SIL system cannot be improved by using a simple high-pass filter, either.

  18. High efficiency multi-pass proton beam extraction with a bent crystal at the SPS

    Science.gov (United States)

    Altuna, X.; Bussa, M. P.; Carboni, G.; Dehning, B.; Elsener, K.; Ferrari, A.; Fidecaro, G.; Freund, A.; Guinand, R.; Gyr, M.; Herr, W.; Klem, J.; Laffin, M.; Lanceri, L.; Mikkelsen, U.; Møller, S. P.; Scandale, W.; Tosello, F.; Uggerhøj, E.; Vuagnin, G.; Weisse, E.; Weisz, S.

    1995-02-01

    Recent measurements of 120 GeV proton extraction by means of a bent silicon crystal at the CERN-SPS accelerator are summarized. The existence of multi-pass extraction has been proven by blocking first-pass extraction: using a crystal covered with an amorphous layer, extracted beam with high efficiency was observed, which provides a direct proof for the importance of the multi-pass mechanism. This opens new possibilities in the design and optimization of a bent crystal extraction scheme.

  19. Pulse propagation in a two-pass optical amplifier with arbitrary laser beams overlap

    Directory of Open Access Journals (Sweden)

    AH Farahbod

    2011-09-01

    Full Text Available An analytical model for two-pass optical amplifier with arbitrary beams overlap has been developed which generalized the classical theory of Frantz-Nodvik for single pass amplifier. The effect of counterpropagating beams on gain and output energy fluence included in the model. Moreover, the appropriate limiting relations for two special cases of weak input signal and saturation state of the amplifier gain have been derived. The results indicate that for complete beams overlap, the gain and output energy have the least values. The model predictions are consistent with experimental observations and exact analytical model for two-pass amplifier when beam propagation paths are coincided.

  20. Very large optical rotation generated by Rb vapor in a multi-pass cell

    CERN Document Server

    Li, S; Sheng, D; Dural, N; Romalis, M V

    2011-01-01

    Paramagnetic Faraday rotation is a powerful technique for atom sensing widely used in quantum non-demolition measurements, fundamental symmetry tests, and other precision measurements. We demonstrate the use of a multi-pass optical cell for Faraday rotation spectroscopy and observe polarization rotation in excess of 100 radians from spin-polarized Rb vapor. Unlike optical cavities, multi-pass cells have a deterministic number of light passes and can be used to measure large optical rotations. We also observe a 10-fold suppression of transverse spin relaxation when Rb atoms are placed in a coherent superposition state immune to spin-exchange collisions.

  1. Numerical Investigation of Surface Plasmons Associated Subwavelength Optical Single-Pass Effect

    Institute of Scientific and Technical Information of China (English)

    MIN Chang-Jun; WANG Pei; JIAO Xiao-Jin; MING Hai

    2007-01-01

    Surface plasmons (SPs) associated optical single-pass effect has been investigated in novel subwavelength metallic structures, including single slit and grating structures. With influence of SPs, these metallic structures can enhance transmission in incident direction and suppress it in the opposite direction, exhibiting a single-pass effect. The finite difference time domain method is employed to study the influences of structure parameters on far-field transmission, near-field electric field distribution and extinction ratio of the single-pass transmission effect. A maximal extinction ratio of 47.83 dB is achieved in the grating structure.

  2. Bank Efficiency and Interest Rate Pass-Through:Evidence from Czech Loan Products

    OpenAIRE

    Havránek, Tomáš; Havránková, Zuzana; Lešanovská, Jitka

    2015-01-01

    An important component of monetary policy transmission is the pass-through from financial market interest rates, directly influenced or targeted by central banks, to the rates that banks charge firms and households. Yet the available evidence on the strength and speed of the pass-through is mixed and varies across countries, time periods, and even individual banks. We examine the pass-through mechanism using a unique data set of Czech loan and deposit products and focus on bank-level determin...

  3. Effect of pass schedule and groove design on the metal deformation of 38MnVS6 in the initial passes of hot rolling

    Indian Academy of Sciences (India)

    R S Nalawade; V R Marje; G Balachandran; V Balasubramanian

    2016-01-01

    The deformation behaviour of a hot rolled micro-alloyed steel bar of grade 38MnVS6 was examined using an FEM model during the initial passes in a blooming mill, as a function of three different pass schedules,roll groove depth, collar taper angle and corner radius. The simulations predicted the effective strain penetration,load, torque, fish tail billet end shapes, and metal flow behaviour at a chosen temperature, mill rpm and draft. The model predictions were validated for typical groove geometry and a typical pass schedule. Lower collar taper angle, lower corner radius and higher depth of groove in hot rolling enabled achievement of higher strain penetration, higher mill load and lower fish tail formation. The present study establishes the capability of the model to improve the internal quality of the rolled billet as measured by effective strain which was corroborated to the rolled bar macrostructure and microstructure. The model enables yield improvement by the choice of draft to minimise fish tail losses. The surface quality is improved by the ability to avoid fin formation that occurs at certain conditions of rolling. Thus, the groove geometry, roll pass schedule and rolling mill parameters and temperature can be optimised for best product quality and yield.

  4. First results of electron temperature measurements by the use of multi-pass Thomson scattering system in GAMMA 10

    Energy Technology Data Exchange (ETDEWEB)

    Yoshikawa, M., E-mail: yosikawa@prc.tsukuba.ac.jp; Nagasu, K.; Shimamura, Y.; Shima, Y.; Kohagura, J.; Sakamoto, M.; Nakashima, Y.; Imai, T.; Ichimura, M. [Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577 (Japan); Yasuhara, R.; Yamada, I.; Funaba, H.; Kawahata, K. [National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292 (Japan); Minami, T. [Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)

    2014-11-15

    A multi-pass Thomson scattering (TS) has the advantage of enhancing scattered signals. We constructed a multi-pass TS system for a polarisation-based system and an image relaying system modelled on the GAMMA 10 TS system. We undertook Raman scattering experiments both for the multi-pass setting and for checking the optical components. Moreover, we applied the system to the electron temperature measurements in the GAMMA 10 plasma for the first time. The integrated scattering signal was magnified by approximately three times by using the multi-pass TS system with four passes. The electron temperature measurement accuracy is improved by using this multi-pass system.

  5. How we pass from fuzzy $po$-semigroups to fuzzy $po$-$\\Gamma$-semigroups

    OpenAIRE

    Kehayopulu, Niovi

    2014-01-01

    The results on fuzzy ordered semigroups (or on fuzzy semigroups) can be transferred to fuzzy ordered gamma (or to fuzzy gamma) semigroups. We show the way we pass from fuzzy ordered semigroups to fuzzy ordered gamma semigroups.

  6. Thin-disk laser pump schemes for large number of passes and moderate pump source quality

    Science.gov (United States)

    Schuhmann, Karsten; Hänsch, Theodor W.; Kirch, Klaus; Knecht, Andreas; Kottmann, Franz; Nez, Francois; Pohl, Randolf; Taqqu, David; Antognini, Aldo

    2015-11-01

    Novel thin-disk laser pump layouts are proposed yielding an increased number of passes for a given pump module size and pump source quality. These novel layouts result from a general scheme which bases on merging two simpler pump optics arrangements. Some peculiar examples can be realized by adapting standard commercially available pump optics simply by intro ducing an additional mirror-pair. More pump passes yield better efficiency, opening the way for usage of active materials with low absorption. In a standard multi-pass pump design, scaling of the number of beam passes brings ab out an increase of the overall size of the optical arrangement or an increase of the pump source quality requirements. Such increases are minimized in our scheme, making them eligible for industrial applications

  7. Who can replace Xavi? A passing motif analysis of football players

    CERN Document Server

    Peña, Javier López

    2015-01-01

    Traditionally, most of football statistical and media coverage has been focused almost exclusively on goals and (ocassionally) shots. However, most of the duration of a football game is spent away from the boxes, passing the ball around. The way teams pass the ball around is the most characteristic measurement of what a team's "unique style" is. In the present work we analyse passing sequences at the player level, using the different passing frequencies as a "digital fingerprint" of a player's style. The resulting numbers provide an adequate feature set which can be used in order to construct a measure of similarity between players. Armed with such a similarity tool, one can try to answer the question: Who might possibly replace Xavi at FC Barcelona?

  8. Integrated Cu-based TM-pass polarizer using CMOS technology platform

    KAUST Repository

    Ng, Tien Khee

    2010-01-01

    A transverse-magnetic-pass (TM-pass) copper (Cu) polarizer is proposed and analyzed using the previously published two-dimensional Method-of-Lines beam-propagation model. The proposed polarizer exhibits a simulated high-pass filter characteristics, with TM0 and TE0 mode transmissivity of >70% and <5%, respectively, in the wavelength regime of 1.2-1.6 μm. The polarization extinction ratio (PER) given by 10 log10 (PTM0)/(PTE0) is +11.5 dB across the high-pass wavelength regime. To the best of the authors\\' knowledge, we report here the smallest footprint CMOS-platform compatible TM-polarizer.

  9. Improving Program NCLEX Pass Rates: Strategies from One State Board of Nursing.

    Science.gov (United States)

    Libner, Joan; Kubala, Sandra

    2017-09-15

    This article describes the response of the Illinois Board of Nursing to an escalating number of prelicensure nursing programs with low National Council Licensure Examination (NCLEX) pass rates. The response aligns with stipulations of the Illinois Nurse Practice Act and best practices. NCLEX success is crucial to launching the careers of nursing graduates and to maintaining approval status of prelicensure programs by state regulatory bodies. Boards strive to guide programs with low pass rates fairly and consistently. The Illinois Board of Nursing created a tool and process addressing curriculum and resources, faculty, students, and administrative support in a programmatic approach to improving pass rates. Initial outcomes were positive. Anecdotal evidence of programs in good standing also confirmed the tool's value as a resource to promoting graduate success. A programmatic approach can provide guidance for boards of nursing to address low NCLEX pass rates in a consistent evidence-based manner.

  10. Thin-disk laser pump schemes for large number of passes and moderate pump source quality

    CERN Document Server

    Schuhmann, K; Kirch, K; Knecht, A; Kottmann, F; Nez, F; Pohl, R; Taqqu, D; Antognini, A

    2015-01-01

    Novel thin-disk laser pump layouts are proposed yielding an increased number of passes for a given pump module size and pump source quality. These novel layouts result from a general scheme which bases on merging two simpler pump optics arrangements. Some peculiar examples can be realized by adapting standard commercially available pump optics simply by intro ducing an additional mirror-pair. More pump passes yield better efficiency, opening the way for usage of active materials with low absorption. In a standard multi-pass pump design, scaling of the number of beam passes brings ab out an increase of the overall size of the optical arrangement or an increase of the pump source quality requirements. Such increases are minimized in our scheme, making them eligible for industrial applications

  11. 48 CFR 52.215-23 - Limitations on Pass-Through Charges.

    Science.gov (United States)

    2010-10-01

    ... clause: Limitations on Pass-Through Charges (OCT 2009) (a) Definitions. As used in this clause— Added... pricing data in accordance with FAR 15.403-4. (End of clause) Alternate I (OCT 2009). As prescribed in...

  12. S-band gain-flattened EDFA with two-stage double-pass configuration

    Science.gov (United States)

    Fu, Hai-Wei; Xu, Shi-Chao; Qiao, Xue-Guang; Jia, Zhen-An; Liu, Ying-Gang; Zhou, Hong

    2011-11-01

    A gain-flattened S-band erbium-doped fiber amplifier (EDFA) using standard erbium-doped fiber (EDF) is proposed and experimentally demonstrated. The proposed amplifier with two-stage double-pass configuration employs two C-band suppressing filters to obtain the optical gain in S-band. The amplifier provides a maximum signal gain of 41.6 dB at 1524 nm with the corresponding noise figure of 3.8 dB. Furthermore, with a well-designed short-pass filter as a gain flattening filter (GFF), we are able to develop the S-band EDFA with a flattened gain of more than 20 dB in 1504-1524 nm. In the experiment, the two-stage double-pass amplifier configuration improves performance of gain and noise figure compared with the configuration of single-stage double-pass S-band EDFA.

  13. Statistical variability and confidence intervals for planar dose QA pass rates

    Energy Technology Data Exchange (ETDEWEB)

    Bailey, Daniel W.; Nelms, Benjamin E.; Attwood, Kristopher; Kumaraswamy, Lalith; Podgorsak, Matthew B. [Department of Physics, State University of New York at Buffalo, Buffalo, New York 14260 (United States) and Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Canis Lupus LLC, Merrimac, Wisconsin 53561 (United States); Department of Biostatistics, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Department of Molecular and Cellular Biophysics and Biochemistry, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States) and Department of Physiology and Biophysics, State University of New York at Buffalo, Buffalo, New York 14214 (United States)

    2011-11-15

    Purpose: The most common metric for comparing measured to calculated dose, such as for pretreatment quality assurance of intensity-modulated photon fields, is a pass rate (%) generated using percent difference (%Diff), distance-to-agreement (DTA), or some combination of the two (e.g., gamma evaluation). For many dosimeters, the grid of analyzed points corresponds to an array with a low areal density of point detectors. In these cases, the pass rates for any given comparison criteria are not absolute but exhibit statistical variability that is a function, in part, on the detector sampling geometry. In this work, the authors analyze the statistics of various methods commonly used to calculate pass rates and propose methods for establishing confidence intervals for pass rates obtained with low-density arrays. Methods: Dose planes were acquired for 25 prostate and 79 head and neck intensity-modulated fields via diode array and electronic portal imaging device (EPID), and matching calculated dose planes were created via a commercial treatment planning system. Pass rates for each dose plane pair (both centered to the beam central axis) were calculated with several common comparison methods: %Diff/DTA composite analysis and gamma evaluation, using absolute dose comparison with both local and global normalization. Specialized software was designed to selectively sample the measured EPID response (very high data density) down to discrete points to simulate low-density measurements. The software was used to realign the simulated detector grid at many simulated positions with respect to the beam central axis, thereby altering the low-density sampled grid. Simulations were repeated with 100 positional iterations using a 1 detector/cm{sup 2} uniform grid, a 2 detector/cm{sup 2} uniform grid, and similar random detector grids. For each simulation, %/DTA composite pass rates were calculated with various %Diff/DTA criteria and for both local and global %Diff normalization

  14. Pine Island, Matlacha Pass, Island Bay, and Caloosahatchee National Wildlife Refuges: Comprehensive Conservation Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This Comprehensive Conservation Plan (CCP) was written to guide management on Pine Island, Matlacha Pass, Island Bay, and Caloosahatchee NWRs for the next 15 years....

  15. Jamming transitions and the effect of interruption probability in a lattice traffic flow model with passing

    Science.gov (United States)

    Redhu, Poonam; Gupta, Arvind Kumar

    2015-03-01

    A new lattice hydrodynamic model is proposed by considering the interruption probability effect on traffic flow with passing and analyzed both theoretically and numerically. From linear and non-linear stability analysis, the effect of interruption probability on the phase diagram is investigated and the condition of existence for kink-antikink soliton solution of mKdV equation is derived. The stable region is enhanced with interruption probability and the jamming transition occurs from uniform flow to kink flow through chaotic flow for higher and intermediate values of non-interruption effect of passing. It is also observed that there exists conventional jamming transition between uniform flow and kink flow for lower values of non-interruption effect of passing. Numerical simulations are carried out and found in accordance with the theoretical findings which confirm that the effect of interruption probability plays an important role in stabilizing traffic flow when passing is allowed.

  16. Recycle Effect on Device Performance of Wire Mesh Packed Double-Pass Solar Air Heaters

    Directory of Open Access Journals (Sweden)

    Chii-Dong Ho

    2014-11-01

    Full Text Available A new device for inserting an absorber plate to divide a flat-plate channel into two subchannels to conduct double-pass wire mesh packed operations was developed. The proposed wire mesh packed device improves the heat transfer efficiency substantially as compared that to flat-plate single-pass and double-pass operations using the same working dimensions, and the improvement of device performance was investigated experimentally and theoretically. Good agreement between the theoretical prediction and the measured values from the experimental results was achieved. Considerable heat transfer improvement was obtained employing wire mesh packed double-pass operations under the absorber plate with external recycle. The influences of recycle ratio on the heat transfer efficiency and the power consumption increase were also discussed.

  17. Multi-pass oscillator layout for high-energy mode-locked thin-disk lasers

    CERN Document Server

    Schuhmann, K; Antognini, A

    2016-01-01

    A novel optical layout for a multi-pass resonator is presented paving the way for pulse energy scaling of mode-locked thin-disk lasers. The multi-pass resonator we are proposing consists of a concatenation of nearly identical optical segments. Each segment corresponds to a round-trip in an optically stable cavity containing an active medium exhibiting soft aperture effects. This scheme is apt for energy and power scaling because the stability region of this multi-pass resonator contrarily to the 4f-based schemes does not shrink with the number of passes. We conclude proposing a simple way to double the stability region of the state-of-the-art layouts used in the industry achievable by a minimal rearrangement of the used optical components.

  18. Single and double pass solar air heaters with wire mesh as packing bed

    Energy Technology Data Exchange (ETDEWEB)

    Aldabbagh, L.B.Y.; Egelioglu, F. [Mechanical Engineering Department, Eastern Mediterranean University, Magosa, Mersin 10 (Turkey); Ilkan, M. [School of Computing and Tecnology, Eastern Mediterranean University, Magosa, Mersin 10 (Turkey)

    2010-09-15

    The thermal performances of single and double pass solar air heaters with steel wire mesh layers are used instead of a flat absorber plate are investigated experimentally. The effects of mass flow rate of air on the outlet temperature and thermal efficiency were studied. The results indicate that the efficiency increases with increasing the mass flow rate for the range of the flow rate used in this work between 0.012 and 0.038 kg/s. For the same flow rate, the efficiency of the double pass is found to be higher than the single pass by 34-45%. Moreover, the maximum efficiencies obtained for the single and the double pass air collectors are 45.93 and 83.65% respectively for the mass flow rate of 0.038 kg/s. Comparison of the results of a packed bed collector with those of a conventional collector shows a substantial enhancement in the thermal efficiency. (author)

  19. Minimizing self-employment taxes to owners of pass-through entities

    National Research Council Canada - National Science Library

    George G Jones; Mark A Luscombe

    2015-01-01

    ... (not subject to SECA tax). In discussing its Fl 2016 "greenbook" proposal, the Treasury stated that the taxation of income earned by owners of pass-through entities is outdated, unfair and inefficient because it treats...

  20. TECHNICAL DESIGN NOTE Multi-pass light amplification for tomographic particle image velocimetry applications

    Science.gov (United States)

    Ghaemi, Sina; Scarano, Fulvio

    2010-12-01

    The light source budget is a critical issue for tomographic particle image velocimetry (Tomo-PIV) systems due to its requirement for large illuminated volume and imaging at small apertures. In this work, a light amplification system based on the multi-pass concept is investigated for Tomo-PIV applications. The system design is performed on the basis of a theoretical model providing an estimation of the most important system parameters and above all the amplification gain. The multi-pass light amplification concept is verified experimentally by measuring the scattered light intensity across the illuminated volume. The results demonstrate a gain factor of 7 and 5 times in comparison with the single-pass and double-pass illumination approaches, respectively.

  1. Theoretic derivation of directed acyclic subgraph algorithm and comparisons with message passing algorithm

    Science.gov (United States)

    Ha, Jeongmok; Jeong, Hong

    2016-07-01

    This study investigates the directed acyclic subgraph (DAS) algorithm, which is used to solve discrete labeling problems much more rapidly than other Markov-random-field-based inference methods but at a competitive accuracy. However, the mechanism by which the DAS algorithm simultaneously achieves competitive accuracy and fast execution speed, has not been elucidated by a theoretical derivation. We analyze the DAS algorithm by comparing it with a message passing algorithm. Graphical models, inference methods, and energy-minimization frameworks are compared between DAS and message passing algorithms. Moreover, the performances of DAS and other message passing methods [sum-product belief propagation (BP), max-product BP, and tree-reweighted message passing] are experimentally compared.

  2. Analysis of CMOS Compatible Cu-Based TM-Pass Optical Polarizer

    KAUST Repository

    Ng, Tien Khee

    2012-02-10

    A transverse-magnetic-pass (TM-pass) optical polarizer based on Cu complementary metal-oxide-semiconductor technology platform is proposed and analyzed using the 2-D method-of-lines numerical model. In designing the optimum configuration for the polarizer, it was found that the metal-insulator-metal (MIM) polarizer structure is superior compared to the insulator-metal-insulator polarizer structure due to its higher polarization extinction ratio (PER) and low insertion loss. An optimized MIM TM-pass polarizer exhibits simulated long wavelength pass filter characteristics of > ?1.2 ?m, with fundamental TM 0 and TE 0 mode transmissivity of >70% and <5%, respectively, and with PER ?11.5 dB in the wavelength range of 1.2-1.6 ?m. The subwavelength and submicrometer features of this TM-polarizer are potentially suitable for compact and low power photonics integrated circuit implementation on silicon-based substrates. © 1989-2012 IEEE.

  3. Supplementary First-Order All-Pass Filters with Two Grounded Passive Elements Using FDCCII

    Directory of Open Access Journals (Sweden)

    K. Pal

    2011-06-01

    Full Text Available In this study, two novel first-order all-pass filters are proposed using only one grounded resistor and one grounded capacitor along with a fully differential current conveyor (FDCCII. There is no element-matching restriction. The presented all-pass filter circuits can be made electronically tunable due to the electronic resistors. Furthermore, the presented circuits enjoy high-input impedance for easy cascadability. The theoretical results are verified with SPICE simulations.

  4. Special Apodized Fiber Bragg Grating for Flat-top Band-pass Reflectivity Filter

    Institute of Scientific and Technical Information of China (English)

    LIU Yu-min; YU Zhong-yuan; YANG Hong-bo; YANG Bo-jun; YU Li; ZHANG Xiao-guang

    2004-01-01

    The characteristics of special apodized fiber Bragg grating (FBG) in flat-top pass-band as reflectivity filter are presented. This special apodized FBG was designed by the particle swarm optimization algorithm. Compared with conventional apodized FBG, the special apodized FBG presented was more robust in the flat-top pass-band characteristic even if the strength of grating is very week. This technology is very interesting in designing the filter for wavelength division multiplexing system.

  5. Degree distribution of position-dependent ball-passing networks in football games

    CERN Document Server

    Narizuka, Takuma; Yamazaki, Yoshihiro

    2015-01-01

    We propose a simple stochastic model describing the position-dependent ball-passing network in football games. In this network, a player on a certain area in the divided fields is a node, and a pass between two nodes corresponds to an edge. Our model is characterized by the consecutive choice of a node dependent on its intrinsic fitness. We derive the explicit expression of the degree distribution, and find that the derived distribution reproduces the real data quit well.

  6. Detection and Discrimination in One-Pass Using the OPTEMA Towed-Array

    Science.gov (United States)

    2014-11-01

    INTERIM TECHNICAL REPORT Detection and Discrimination in One-Pass Using the OPTEMA Towed-Array ESTCP Project MR-201225 NOVEMBER 2014...2014 4. TITLE AND SUBTITLE Detection and Discrimination in One-Pass Using the OPTEMA Towed Array: APG Standardized UXO Demonstration Site Technical...vs. probability of false positive for ranking assignments based on classification decisions ( discrimination ). The black solid line indicates our

  7. Variability of Labrador Sea Water transported through Flemish Pass during 1993-2013

    Science.gov (United States)

    Schneider, Linn; Kieke, Dagmar; Jochumsen, Kerstin; Colbourne, Eugene; Yashayaev, Igor; Steinfeldt, Reiner; Varotsou, Eirini; Serra, Nuno; Rhein, Monika

    2015-08-01

    Flemish Pass, located at the western subpolar margin, is a passage (sill depth 1200 m) that is constrained by the Grand Banks and the underwater plateau Flemish Cap. In addition to the Deep Western Boundary Current (DWBC) pathway offshore of Flemish Cap, Flemish Pass represents another southward transport pathway for two modes of Labrador Sea Water (LSW), the lightest component of North Atlantic Deep Water carried with the DWBC. This pathway avoids potential stirring regions east of Flemish Cap and deflection into the interior North Atlantic. Ship-based velocity measurements between 2009 and 2013 at 47°N in Flemish Pass and in the DWBC east of Flemish Cap revealed a considerable southward transport of Upper LSW through Flemish Pass (15-27%, -1.0 to -1.5 Sv). About 98% of the denser Deep LSW were carried around Flemish Cap as Flemish Pass is too shallow for considerable transport of Deep LSW. Hydrographic time series from ship-based measurements show a significant warming of 0.3°C/decade and a salinification of 0.03/decade of the Upper LSW in Flemish Pass between 1993 and 2013. Almost identical trends were found for the evolution in the Labrador Sea and in the DWBC east of Flemish Cap. This indicates that the long-term hydrographic variability of Upper LSW in Flemish Pass as well as in the DWBC at 47°N is dominated by changes in the Labrador Sea, which are advected southward. Fifty years of numerical ocean model simulations in Flemish Pass suggest that these trends are part of a multidecadal cycle.

  8. High-Performance Message Passing over generic Ethernet Hardware with Open-MX

    OpenAIRE

    Goglin, Brice

    2011-01-01

    International audience; In the last decade, cluster computing has become the most popular high-performance computing architecture. Although numerous technological innovations have been proposed to improve the interconnection of nodes, many clusters still rely on commodity Ethernet hardware to implement message passing within parallel applications. We present Open-MX, an open-source message passing stack over generic Ethernet. It offers the same abilities as the specialized Myrinet Express sta...

  9. Do progression and remediation policies improve NCLEX-RN pass rates?

    Science.gov (United States)

    Morrison, Susan; Free, Kathleen Walsh; Newman, Mary

    2008-01-01

    Administrators at 5 schools of nursing who implemented a progression policy based on HESI Exit Examtrade mark scores were interviewed regarding their NCLEX-RN pass rates before and after initiating the policy and methods used for remediation. Even though the methods used for remediation were quite different among the participating schools, data obtained from these interviews indicated that the schools' NCLEX-RN pass rates improved 9-41% within 2 years after implementing the progression policies.

  10. Space Shuttle Program Primary Avionics Software System (PASS) Success Legacy - Quality and Reliability Date

    Science.gov (United States)

    Orr, James K.; Peltier, Daryl

    2010-01-01

    Thsi slide presentation reviews the avionics software system on board the space shuttle, with particular emphasis on the quality and reliability. The Primary Avionics Software System (PASS) provides automatic and fly-by-wire control of critical shuttle systems which executes in redundant computers. Charts given show the number of space shuttle flights vs time, PASS's development history, and other charts that point to the reliability of the system's development. The reliability of the system is also compared to predicted reliability.

  11. Efficient Mining of Association Rules by Reducing the Number of Passes over the Database

    Institute of Scientific and Technical Information of China (English)

    李庆忠; 王海洋; 闫中敏; 马绍汉

    2001-01-01

    This paper introduces a new algorithm of mining association rules.The algorithm RP counts the itemsets with different sizes in the same pass of scanning over the database by dividing the database into m partitions. The total number of passes over the database is only (k+2m-2)/m, where k is the longest size in the itemsets. It is much less than k.

  12. Message Passing Based Time Synchronization in Wireless Sensor Networks: A Survey

    OpenAIRE

    2016-01-01

    Various protocols have been proposed in the area of wireless sensor networks in order to achieve network-wide time synchronization. A large number of proposed protocols in the literature employ a message passing mechanism to make sensor node clocks tick in unison. In this paper, we first classify Message Passing based Time Synchronization (MPTS) protocols and then analyze them based on different metrics. The classification is based on the following three criteria: structure formation of the n...

  13. Study of Stress and Strain Distributions of First Pass Conventional Spinning Under Different Roller-trace

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Based on simplified axisymmetrical forming model, a elasto-plastic FEM simulation system of multi-pass conventional spinning is developed. Taking the typical draw-spinning as the study object, and establishing reasonable mechanics model, research on the first pass of spinning process is carried out with FEM system developed. The distributions of the stress and strain are obtained by three types of roller-trace curves: straight line, involute curves and quadratic curves. The results are as follows: (1) The v...

  14. Malnutrition: role of the TwoCal HN Med Pass program.

    Science.gov (United States)

    Bender, S; Pusateri, M; Cook, A; Ferguson, M; Hall, J C

    2000-12-01

    Malnutrition is common in older adults and is associated with poor outcomes. The causes and outcomes of malnutrition are discussed, and the TwoCal HN Med Pass program, designed to overcome poor dietary intake, is described. Benefits of the program, role of the pharmacist, identification of candidates for the TwoCal HN Med Pass program, and health care team roles and responsibilities are reviewed.

  15. Community Project for Accelerator Science and Simulation (ComPASS) Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Cary, John R. [Tech-X Corporation, Boulder, CO (United States); Cowan, Benjamin M. [Tech-X Corporation, Boulder, CO (United States); Veitzer, S. A. [Tech-X Corporation, Boulder, CO (United States)

    2016-03-04

    Tech-X participated across the full range of ComPASS activities, with efforts in the Energy Frontier primarily through modeling of laser plasma accelerators and dielectric laser acceleration, in the Intensity Frontier primarily through electron cloud modeling, and in Uncertainty Quantification being applied to dielectric laser acceleration. In the following we present the progress and status of our activities for the entire period of the ComPASS project for the different areas of Energy Frontier, Intensity Frontier and Uncertainty Quantification.

  16. On decidability and model checking for a first order modal logic for value-passing processes

    Institute of Scientific and Technical Information of China (English)

    薛锐; 林惠民

    2003-01-01

    A semantic interpretation of a first order extension of Hennessy-Milner logic for value-passing processes, named HML(FO), is presented. The semantics is based on symbolic transitiongraphs with assignment. It is shown that the satisfiability of the two-variable sub-logic HML(FO2) ofHML(FO) is decidable, and the complexity discussed. Finally, a decision procedure for model checkingthe value-passing processes with respect to HML(FO2) is obtained.

  17. A Novel Single Pass Authenticated Encryption Stream Cipher for Software Defined Radios

    DEFF Research Database (Denmark)

    Khajuria, Samant

    2012-01-01

    high throughput and low overhead for SDRs. The thesis is divided into two research topics. One topic is the design of a 1-pass authenticated encryption scheme that can accomplish both message secrecy and authenticity in a single cryptographic primitive. The other topic is the implementation...... and achieves throughput in the range of 0.8 Gbps which can be suitably used for SDR applications. Comparing with traditional two pass approaches, the presented design demonstrates high throughput and small area to performance ratio....

  18. Ultra-compact Higher-Order-Mode Pass Filter in a Silicon Waveguide

    DEFF Research Database (Denmark)

    Guan, Xiaowei; Frandsen, Lars Hagedorn; Ding, Yunhong

    2015-01-01

    An 3.7 μm long higher-order-mode pass filter with an extinction ratio larger than 20 dB is demonstrated in a 1D corrugated silicon multimode waveguide......An 3.7 μm long higher-order-mode pass filter with an extinction ratio larger than 20 dB is demonstrated in a 1D corrugated silicon multimode waveguide...

  19. Assessment of Lateral Driving Stability of Automobiles Passing by the Pylon Zone under Cross Wind

    OpenAIRE

    Dalei Wang; Airong Chen

    2012-01-01

    In order to explore the reason of lateral instability of automobile passing by the pylon zone of cablesupported bridge under cross wind, a new evaluation method of lateral driving stability of automobile considering alternative cross wind is established based on multi-objective driving stability criteria and subjective assessment. Typical driving control process and dynamic response of automobile passing by the pylon zone is given by numerical simulation based on steering wheel fixed-control ...

  20. Optics correction for the multi-pass FFAG ERL machine eRHIC

    Energy Technology Data Exchange (ETDEWEB)

    Liu, C. [Brookhaven National Lab. (BNL), Upton, NY (United States); Brooks, S. [Brookhaven National Lab. (BNL), Upton, NY (United States); Litvinenko, V. [Brookhaven National Lab. (BNL), Upton, NY (United States); Minty, M. [Brookhaven National Lab. (BNL), Upton, NY (United States); Ptitsyn, V. [Brookhaven National Lab. (BNL), Upton, NY (United States); Trbojevic, D. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2015-05-03

    Gradient errors in the multi-pass Fixed Field Alternating Gradient (FFAG) Energy Recovery Linac (ERL) machine, eRHIC, distort the beam orbit and therefore cause emittance increase. The localization and correction of gradient errors are essential for an effective orbit correction and emittance preservation. In this report, the methodology and simulation of optics correction for the multi-pass FFAG ERL machine eRHIC will be presented.

  1. Verification of Faulty Message Passing Systems with Continuous State Space in PVS

    Science.gov (United States)

    Pilotto, Concetta; White, Jerome

    2010-01-01

    We present a library of Prototype Verification System (PVS) meta-theories that verifies a class of distributed systems in which agent commu nication is through message-passing. The theoretic work, outlined in, consists of iterative schemes for solving systems of linear equations , such as message-passing extensions of the Gauss and Gauss-Seidel me thods. We briefly review that work and discuss the challenges in formally verifying it.

  2. Detection and Discrimination in One Pass Using the OPTEMA Towed Array

    Science.gov (United States)

    2017-02-21

    MR-201225) Detection and Discrimination in One-Pass Using the OPTEMA Towed-Array February 2017 This document has been cleared for public release...Dec. 2016 4. TITLE AND SUBTITLE Detection and Discrimination in One-Pass Using the OPTEMA Towed Array: Final Technical Report, Former...existing process with minimal impact to the overall flow. This process has demonstrated significant success for discriminating Targets of Interest

  3. Four-Pass Coupler for Laser-Diode-Pumped Solid-State Laser

    Science.gov (United States)

    Coyle, Donald B.

    2008-01-01

    A four-pass optical coupler affords increased (in comparison with related prior two-pass optical couplers) utilization of light generated by a laser diode in side pumping of a solid-state laser slab. The original application for which this coupler was conceived involves a neodymium-doped yttrium aluminum garnet (Nd:YAG) crystal slab, which, when pumped by a row of laser diodes at a wavelength of 809 nm, lases at a wavelength of 1,064 nm. Heretofore, typically, a thin laser slab has been pumped in two passes, the second pass occurring by virtue of reflection of pump light from a highly reflective thin film on the side opposite the side through which the pump light enters. In two-pass pumping, a Nd:YAG slab having a thickness of 2 mm (which is typical) absorbs about 84 percent of the 809-nm pump light power, leaving about 16 percent of the pump light power to travel back toward the laser diodes. This unused power can cause localized heating of the laser diodes, thereby reducing their lifetimes. Moreover, if the slab is thinner than 2 mm, then even more unused power travels back toward the laser diodes. The four-pass optical coupler captures most of this unused pump light and sends it back to the laser slab for two more passes. As a result, the slab absorbs more pump light, as though it were twice as thick. The gain and laser cavity beam quality of a smaller laser slab in conjunction with this optical coupler can thus be made comparable to those of a larger two-pass-pumped laser slab.

  4. IMPACT OF THE REPEATED TRACTOR PASSES ON SOME PHYSICAL PROPERTIES OF SILTY LOAM SOIL

    Directory of Open Access Journals (Sweden)

    Dubravko Filipović

    2011-12-01

    Full Text Available The aim of this paper was to quantify soil compaction induced by tractor traffic on untilled wet silty loam soil (Mollic Fluvisol. Changes in penetration resistance, bulk density and total porosity were measured for detecting the soil compaction. Treatments include ten passes of a four-wheel drive tractor with the engine power of 54.0 kW and weight of 3560 kg (1580 kg on the front axle and 1980 kg on the rear axle, 2.41 m distance between axles. The tyres on the tractor were cross-ply, front 11.2-24 and rear 16.9-30, with the inflation pressure of 160 kPa and 100 kPa, respectively. The speed of tractor during passes over experimental plots was 5.0 km h-1. In comparison to control, each tractor pass induced an increase in soil penetration resistance at all depths, and the average increment ratios, determined as the average of all layers, were 9.8, 18.5 and 26.1% after one, five and ten passes, respectively. The bulk density also increased with number of tractor passes, but with less percentage increasing. The increment ratios comparison to the control were 3.6, 9.5 and 12.9% after one, five and ten passes, respectively. The total porosity decreased with the number of passes, and the decrement ratios were 4.5, 16.5 and 20.8% after one, five and ten passes, respectively.

  5. Evaluating single-pass catch as a tool for identifying spatial pattern in fish distribution

    Science.gov (United States)

    Bateman, D.S.; Gresswell, R.E.; Torgersen, C.E.

    2005-01-01

    We evaluate the efficacy of single-pass electrofishing without blocknets as a tool for collecting spatially continuous fish distribution data in headwater streams. We compare spatial patterns in abundance, sampling effort, and length-frequency distributions from single-pass sampling of coastal cutthroat trout (Oncorhynchus clarki clarki) to data obtained from a more precise multiple-pass removal electrofishing method in two mid-sized (500–1000 ha) forested watersheds in western Oregon. Abundance estimates from single- and multiple-pass removal electrofishing were positively correlated in both watersheds, r = 0.99 and 0.86. There were no significant trends in capture probabilities at the watershed scale (P > 0.05). Moreover, among-sample variation in fish abundance was higher than within-sample error in both streams indicating that increased precision of unit-scale abundance estimates would provide less information on patterns of abundance than increasing the fraction of habitat units sampled. In the two watersheds, respectively, single-pass electrofishing captured 78 and 74% of the estimated population of cutthroat trout with 7 and 10% of the effort. At the scale of intermediate-sized watersheds, single-pass electrofishing exhibited a sufficient level of precision to be effective in detecting spatial patterns of cutthroat trout abundance and may be a useful tool for providing the context for investigating fish-habitat relationships at multiple scales.

  6. JEMMRLA - Electron Model of a Muon RLA with Multi-pass Arcs

    Energy Technology Data Exchange (ETDEWEB)

    Bogacz, Slawomir Alex; Krafft, Geoffrey A.; Morozov, Vasiliy S.; Roblin, Yves R.

    2013-06-01

    We propose a demonstration experiment for a new concept of a 'dogbone' RLA with multi-pass return arcs -- JEMMRLA (Jlab Electron Model of Muon RLA). Such an RLA with linear-field multi-pass arcs was introduced for rapid acceleration of muons for the next generation of Muon Facilities. It allows for efficient use of expensive RF while the multi-pass arc design based on linear combined-function magnets exhibits a number of advantages over separate-arc or pulsed-arc designs. Here we describe a test of this concept by scaling a GeV scale muon design for electrons. Scaling muon momenta by the muon-to-electron mass ratio leads to a scheme, in which a 4.5 MeV electron beam is injected in the middle of a 3 MeV/pass linac with two double-pass return arcs and is accelerated to 18 MeV in 4.5 passes. All spatial dimensions including the orbit distortion are scaled by a factor of 7.5, which arises from scaling the 200 MHz muon RF to a readily available 1.5 GHz. The hardware requirements are not very demanding making it straightforward to implement. Such an RLA may have applications going beyond muon acceleration: in medical isotope production, radiation cancer therapy and homeland security.

  7. An empirical study of exchange rate pass-through in China

    Directory of Open Access Journals (Sweden)

    Jin Xiaowen

    2012-01-01

    Full Text Available This paper seeks to estimate exchange rate pass-through in China and investigate its relationship with monetary policy. Linear and VAR models are applied to analyze robustness. The linear model shows that, over the long run, a 1% appreciation of NEER causes a decline in the CPI inflation rate of 0.132% and PPI inflation rate of 0.495%. The VAR model supports the results of the linear model, suggesting a fairly low CPI pass-through and relatively higher PPI pass-through. Furthermore, this paper finds that, with the fixed exchange rate regime, CPI pass-through remains higher. The exchange rate regimes influence on CPI pass through, combined with the fact that appreciation diminishes inflation, suggests that the Chinese government could pursue a more flexible exchange rate policy. In addition, reasons for low exchange rate pass-through for CPI are analyzed. The analysis considers price control, basket and weight of Chinese price indices, distribution cost, and imported and non-tradable share of inputs.

  8. Mechanical and microstructural characterization of single and double pass Aluminum AA6061 friction stir weld joints

    Science.gov (United States)

    Othman, N. H.; Shah, L. H.; Ishak, M.

    2015-12-01

    This study focuses on the effect of single pass (SP), double sided pass (DSP) and normal double pass (NDP) method on friction stir welding of aluminum AA6061. Two pieces of AA6061 alloy with thickness of 6 mm were friction stir welded by using conventional milling machine. The rotational speeds that were used in this study were 800 rpm, 1000 rpm and 1200 rpm, respectively. The welding speed is fixed to 100 mm/min. Microstructure observation of welded area was studied by using optical microscope. Tensile test and Vickers hardness test were used to evaluate the mechanical properties of this specimen. Mechanical property analysis results indicate that at low rotational speeds, defects such as surface lack of fill and tunneling in the welded area can be observed. Vickers hardness of specimens however did not vary much when rotational speed is varied. Welded specimens using single pass method shows higher tensile strength and hardness value compared to both double pass methods up to 180.61 MPa. Moreover, DSP showed better tensile test and hardness test compared to NDP method. The optimum parameters were found to be single pass method with 1200 rpm of rotational speed. Therefore economically sound to only perform SP method to obtain maximum tensile strength for AA6061 FSW with thickness of 6 mm.

  9. An initial study on the feasibility of diagnosing myocardial ischemia with CT first-pass myocardial perfusion imaging at rest

    Institute of Scientific and Technical Information of China (English)

    汪奇

    2013-01-01

    Objective To assess the feasibility and accuracy of CT first-pass myocardial perfusion imaging(CT first-pass MPI)at rest for diagnosis of myocardial ischemia.Results of adenosine-induced myocardial perfusion scintigraphy(MPS)

  10. Intramode and Fermi relaxation in CO2, their influence on multiple-pass, short-pulse energy extraction

    NARCIS (Netherlands)

    Rooth, R.A.; van der Pol, J.A.; Haselhoff, E.H.

    1987-01-01

    Analytical, experimental and numerical results concerning the influence of intramode and Fermi relaxation on multiple-pass, nanosecond-pulse energy extraction are presented. Multiple-pass energy extraction experiments show satisfactory agreement with the analytical and numerical calculations which

  11. The MapCHECK Measurement Uncertainty function and its effect on planar dose pass rates.

    Science.gov (United States)

    Bailey, Daniel W; Spaans, Jason D; Kumaraswamy, Lalith K; Podgorsak, Matthew B

    2016-03-08

    Our study aimed to quantify the effect of the Measurement Uncertainty function on planar dosimetry pass rates, as measured and analyzed with the Sun Nuclear Corporation MapCHECK 2 array and its associated software. This optional function is toggled in the program preferences of the software (though turned on by default upon installation), and automatically increases the dose difference tolerance defined by the user for each planar dose comparison. Dose planes from 109 static-gantry IMRT fields and 40 VMAT arcs, of varying modulation complexity, were measured at 5 cm water-equivalent depth in the MapCHECK 2 diode array, and respective calculated dose planes were exported from a commercial treatment planning system. Planar dose comparison pass rates were calculated within the Sun Nuclear Corporation analytic software using a number of calculation parameters, including Measurement Uncertainty on and off. By varying the percent difference (%Diff) criterion for similar analyses performed with Measurement Uncertainty turned off, an effective %Diff criterion was defined for each field/arc corresponding to the pass rate achieved with Measurement Uncertainty turned on. On average, the Measurement Uncertainty function increases the user-defined %Diff criterion by 0.8%-1.1% for 3%/3 mm analysis, depending on plan type and calculation technique (corresponding to an average change in pass rate of 1.0%-3.5%, and a maximum change of 8.7%). At the 2%/2 mm level, the Measurement Uncertainty function increases the user-defined %Diff criterion by 0.7%-1.2% on average, again depending on plan type and calculation technique (corresponding to an average change in pass rate of 3.5%-8.1%, and a maximum change of 14.2%). The largest increases in pass rate due to the Measurement Uncertainty function are generally seen with poorly matched planar dose comparisons, while the function has a notably smaller effect as pass rates approach 100%. The Measurement Uncertainty function, then, may

  12. 22 CFR 9b.7 - Procedures for denial, revocation, or non-renewal of Department of State press building passes.

    Science.gov (United States)

    2010-04-01

    ...-renewal of Department of State press building passes. 9b.7 Section 9b.7 Foreign Relations DEPARTMENT OF STATE GENERAL REGULATIONS GOVERNING DEPARTMENT OF STATE PRESS BUILDING PASSES § 9b.7 Procedures for denial, revocation, or non-renewal of Department of State press building passes. (a) If the Director...

  13. 22 CFR 9b.6 - Grounds for denial, revocation, or non-renewal of Department of State press building passes.

    Science.gov (United States)

    2010-04-01

    ... of Department of State press building passes. 9b.6 Section 9b.6 Foreign Relations DEPARTMENT OF STATE GENERAL REGULATIONS GOVERNING DEPARTMENT OF STATE PRESS BUILDING PASSES § 9b.6 Grounds for denial, revocation, or non-renewal of Department of State press building passes. In consultation with the Bureau...

  14. 75 FR 67086 - Sabine Pass Liquefaction, LLC; Opinion and Order Denying Request for Review Under Section 3(c) of...

    Science.gov (United States)

    2010-11-01

    ... Sabine Pass Liquefaction, LLC; Opinion and Order Denying Request for Review Under Section 3(c) of the... opinion and order pursuant to section 3 of the Natural Gas Act (NGA), that Sabine Pass Liquefaction, LLC's (Sabine Pass) pending application of September 7, 2010, in DOE/FE Docket No. 10-111 LNG for...

  15. 40 CFR 86.1912 - How do I determine whether an engine meets the vehicle-pass criteria?

    Science.gov (United States)

    2010-07-01

    ... meets the vehicle-pass criteria? 86.1912 Section 86.1912 Protection of Environment ENVIRONMENTAL....1912 How do I determine whether an engine meets the vehicle-pass criteria? In general, the average... steps to determine whether an engine meets the vehicle-pass criteria: (a) Determine the NTE...

  16. 48 CFR 252.247-7003 - Pass-Through of Motor Carrier Fuel Surcharge Adjustment To The Cost Bearer.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false Pass-Through of Motor... SOLICITATION PROVISIONS AND CONTRACT CLAUSES Text of Provisions And Clauses 252.247-7003 Pass-Through of Motor...: PASS-THROUGH OF MOTOR CARRIER FUEL SURCHARGE ADJUSTMENT TO THE COST BEARER (SEP 2010) (a) This...

  17. 76 FR 13662 - Pass & Seymour/Legrand a Subsidiary of Legrand North America; Including On-Site Leased Workers...

    Science.gov (United States)

    2011-03-14

    ... Employment and Training Administration Pass & Seymour/Legrand a Subsidiary of Legrand North America..., 2010, applicable to workers of Pass & Seymour/Legrand, a subsidiary of Legrand North America, including...-W-73,934 is hereby issued as follows: All workers of Pass & Seymour/Legrand, a subsidiary of...

  18. 75 FR 65232 - Security Zones; Sabine Bank Channel, Sabine Pass Channel and Sabine-Neches Waterway, TX

    Science.gov (United States)

    2010-10-22

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA87 Security Zones; Sabine Bank Channel, Sabine Pass Channel and Sabine-Neches Waterway, TX AGENCY: Coast Guard, DHS. ACTION: Interim rule with request comments... carriers while they are moored at the Golden Pass LNG facility in Sabine, TX and/or the Sabine Pass...

  19. Driver behavior during bicycle passing maneuvers in response to a Share the Road sign treatment.

    Science.gov (United States)

    Kay, Jonathan J; Savolainen, Peter T; Gates, Timothy J; Datta, Tapan K

    2014-09-01

    The interaction of motorists and bicyclists, particularly during passing maneuvers, is an area of concern to the bicycle safety community as there is a general perception that motor vehicle drivers may not share the road effectively with bicyclists. This is a particular concern on road sections with centerline rumble strips where motorists are prone to crowd bicyclists during passing events. One potential countermeasure to address this concern is the use of a bicycle warning sign with a "Share the Road" plaque. This paper presents the results of a controlled field evaluation of this sign treatment, which involved an examination of driver behavior while overtaking bicyclists. A series of field studies were conducted concurrently on two segments of a high-speed, rural two-lane highway. These segments were similar in terms of roadway geometry, traffic volumes, and other relevant factors, except that one of the segments included centerline rumble strips while the other did not. A before-and-after study design was utilized to examine changes in motor vehicle lateral placement and speed at the time of the passing event as they relate to the presence of centerline rumble strips and the sign treatment. Centerline rumble strips generally shifted vehicles closer to the bicyclists during passing maneuvers, though the magnitude of this effect was marginal. The sign treatment was found to shift motor vehicles away from the rightmost lane positions, though the signs did not significantly affect the mean buffer distance between the bicyclists and passing motorists or the propensity of crowding events during passing. The sign treatment also resulted in a 2.5miles/h (4.0km/h) reduction in vehicle speeds. Vehicle type, bicyclist position, and the presence of opposing traffic were also found to affect lateral placement and speed selection during passing maneuvers.

  20. The Physical Therapy and Society Summit (PASS) Meeting: observations and opportunities.

    Science.gov (United States)

    Kigin, Colleen M; Rodgers, Mary M; Wolf, Steven L

    2010-11-01

    The construct of delivering high-quality and cost-effective health care is in flux, and the profession must strategically plan how to meet the needs of society. In 2006, the House of Delegates of the American Physical Therapy Association passed a motion to convene a summit on "how physical therapists can meet current, evolving, and future societal health care needs." The Physical Therapy and Society Summit (PASS) meeting on February 27-28, 2009, in Leesburg, Virginia, sent a clear message that for physical therapists to be effective and thrive in the health care environment of the future, a paradigm shift is required. During the PASS meeting, participants reframed our traditional focus on the physical therapist and the patient/client (consumer) to one in which physical therapists are an integral part of a collaborative, multidisciplinary health care team with the health care consumer as its focus. The PASS Steering Committee recognized that some of the opportunities that surfaced during the PASS meeting may be disruptive or may not be within the profession's present strategic or tactical plans. Thus, adopting a framework that helps to establish the need for change that is provocative and potentially disruptive to our present care delivery, yet prioritizes opportunities, is a critical and essential step. Each of us in the physical therapy profession must take on post-PASS roles and responsibilities to accomplish the systemic change that is so intimately intertwined with our destiny. This article offers a perspective of the dynamic dialogue and suggestions that emerged from the PASS event, providing further opportunities for discussion and action within our profession.

  1. Per-beam, planar IMRT QA passing rates do not predict clinically relevant patient dose errors

    Energy Technology Data Exchange (ETDEWEB)

    Nelms, Benjamin E.; Zhen Heming; Tome, Wolfgang A. [Canis Lupus LLC and Department of Human Oncology, University of Wisconsin, Merrimac, Wisconsin 53561 (United States); Department of Medical Physics, University of Wisconsin, Madison, Wisconsin 53705 (United States); Departments of Human Oncology, Medical Physics, and Biomedical Engineering, University of Wisconsin, Madison, Wisconsin 53792 (United States)

    2011-02-15

    Purpose: The purpose of this work is to determine the statistical correlation between per-beam, planar IMRT QA passing rates and several clinically relevant, anatomy-based dose errors for per-patient IMRT QA. The intent is to assess the predictive power of a common conventional IMRT QA performance metric, the Gamma passing rate per beam. Methods: Ninety-six unique data sets were created by inducing four types of dose errors in 24 clinical head and neck IMRT plans, each planned with 6 MV Varian 120-leaf MLC linear accelerators using a commercial treatment planning system and step-and-shoot delivery. The error-free beams/plans were used as ''simulated measurements'' (for generating the IMRT QA dose planes and the anatomy dose metrics) to compare to the corresponding data calculated by the error-induced plans. The degree of the induced errors was tuned to mimic IMRT QA passing rates that are commonly achieved using conventional methods. Results: Analysis of clinical metrics (parotid mean doses, spinal cord max and D1cc, CTV D95, and larynx mean) vs IMRT QA Gamma analysis (3%/3 mm, 2/2, 1/1) showed that in all cases, there were only weak to moderate correlations (range of Pearson's r-values: -0.295 to 0.653). Moreover, the moderate correlations actually had positive Pearson's r-values (i.e., clinically relevant metric differences increased with increasing IMRT QA passing rate), indicating that some of the largest anatomy-based dose differences occurred in the cases of high IMRT QA passing rates, which may be called ''false negatives.'' The results also show numerous instances of false positives or cases where low IMRT QA passing rates do not imply large errors in anatomy dose metrics. In none of the cases was there correlation consistent with high predictive power of planar IMRT passing rates, i.e., in none of the cases did high IMRT QA Gamma passing rates predict low errors in anatomy dose metrics or vice versa

  2. Exploring Team Passing Networks and Player Movement Dynamics in Youth Association Football

    Science.gov (United States)

    Coutinho, Diogo; Santos, Sara; Lago-Penas, Carlos; Jiménez, Sergio; Sampaio, Jaime

    2017-01-01

    Understanding how youth football players base their game interactions may constitute a solid criterion for fine-tuning the training process and, ultimately, to achieve better individual and team performances during competition. The present study aims to explore how passing networks and positioning variables can be linked to the match outcome in youth elite association football. The participants included 44 male elite players from under-15 and under-17 age groups. A passing network approach within positioning-derived variables was computed to identify the contributions of individual players for the overall team behaviour outcome during a simulated match. Results suggested that lower team passing dependency for a given player (expressed by lower betweenness network centrality scores) and high intra-team well-connected passing relations (expressed by higher closeness network centrality scores) were related to better outcomes. The correlation between the dyads’ positioning regularity and the passing density showed a most likely higher correlation in under-15 (moderate effect), indicating a possible more dependence of the ball position rather than in the under-17 teams (small/unclear effects). Overall, this study emphasizes the potential of coupling notational analyses with spatial-temporal relations to produce a more functional and holistic understanding of teams’ sports performance. Also, the social network analysis allowed to reveal novel key determinants of collective performance. PMID:28141823

  3. Assessment of Slope Instability and Risk Analysis of Road Cut Slopes in Lashotor Pass, Iran

    Directory of Open Access Journals (Sweden)

    Mohammad Hossein Taherynia

    2014-01-01

    Full Text Available Assessment of the stability of natural and artificial rock slopes is an important topic in the rock mechanics sciences. One of the most widely used methods for this purpose is the classification of the slope rock mass. In the recent decades, several rock slope classification systems are presented by many researchers. Each one of these rock mass classification systems uses different parameters and rating systems. These differences are due to the diversity of affecting parameters and the degree of influence on the rock slope stability. Another important point in rock slope stability is appraisal hazard and risk analysis. In the risk analysis, the degree of danger of rock slope instability is determined. The Lashotor pass is located in the Shiraz-Isfahan highway in Iran. Field surveys indicate that there are high potentialities of instability in the road cut slopes of the Lashotor pass. In the current paper, the stability of the rock slopes in the Lashotor pass is studied comprehensively with different classification methods. For risk analyses, we estimated dangerous area by use of the RocFall software. Furthermore, the dangers of falling rocks for the vehicles passing the Lashotor pass are estimated according to rockfall hazard rating system.

  4. ESTABLISHMENT OF 3D FEM MODEL OF MULTI-PASS SPINNING

    Institute of Scientific and Technical Information of China (English)

    ZHAN Mei; ZHOU Qiang; YANG He; ZHANG Jinhui

    2007-01-01

    In order to improve the computational accuracy and efficiency, it is necessary to establish a reasonable 3D FEM model for multi-pass spinning including not only spinning process but also springback and annealing processes. A numerical model for multi-pass spinning is established using the combination of explicit and implicit FEM, with the advantages of them in accuracy and efficiency. The procedures for model establishment are introduced in detail, and the model is validated. The application of the 3D FEM model to a two-pass spinning shows the following: The field variables such as the stress, strahl and wall thickness during the whole spinning process can be obtained, not only during spinning process but also during springback and annealing processes, and the trends of their distributions and variations are in good agreement with a practical multi-spinning process. Thus the 3D FEM model for multi-pass spinning may be a helpful tool for determination and optimization of process Parameters of multi-pass spinning process.

  5. Exploring Team Passing Networks and Player Movement Dynamics in Youth Association Football.

    Science.gov (United States)

    Gonçalves, Bruno; Coutinho, Diogo; Santos, Sara; Lago-Penas, Carlos; Jiménez, Sergio; Sampaio, Jaime

    2017-01-01

    Understanding how youth football players base their game interactions may constitute a solid criterion for fine-tuning the training process and, ultimately, to achieve better individual and team performances during competition. The present study aims to explore how passing networks and positioning variables can be linked to the match outcome in youth elite association football. The participants included 44 male elite players from under-15 and under-17 age groups. A passing network approach within positioning-derived variables was computed to identify the contributions of individual players for the overall team behaviour outcome during a simulated match. Results suggested that lower team passing dependency for a given player (expressed by lower betweenness network centrality scores) and high intra-team well-connected passing relations (expressed by higher closeness network centrality scores) were related to better outcomes. The correlation between the dyads' positioning regularity and the passing density showed a most likely higher correlation in under-15 (moderate effect), indicating a possible more dependence of the ball position rather than in the under-17 teams (small/unclear effects). Overall, this study emphasizes the potential of coupling notational analyses with spatial-temporal relations to produce a more functional and holistic understanding of teams' sports performance. Also, the social network analysis allowed to reveal novel key determinants of collective performance.

  6. Electron Model Of A Dogbone RLA With Multi-Pass Arcs

    Energy Technology Data Exchange (ETDEWEB)

    Beard, Kevin B. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States) and MUONS Inc., Batavia, IL (United States); Roblin, Yves R. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Morozov, Vasiliy [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Bogacz, Slawomir Alex [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Krafft, Geoffrey A. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

    2012-09-01

    The design of a dogbone Recirculated Linear Accelerator, RLA, with linear-field multi-pass arcs was earlier developed [1] for accelerating muons in a Neutrino Factory and a Muon Collider. It allows for efficient use of expensive RF while the multi-pass arc design based on linear combined-function magnets exhibits a number of advantages over separate-arc or pulsed-arc designs. Such an RLA may have applications going beyond muon acceleration. This paper describes a possible straightforward test of this concept by scaling a GeV scale muon design for electrons. Scaling muon momenta by the muon-to-electron mass ratio leads to a scheme, in which a 4.5 MeV electron beam is injected at the middle of a 3 MeV/pass linac with two double-pass return arcs and is accelerated to 18 MeV in 4.5 passes. All spatial dimensions including the orbit distortion are scaled by a factor of 7.5, which arises from scaling the 200 MHz muon RF to the frequency readily available at CEBAF: 1.5 GHz. The footprint of a complete RLA fits in an area of 25 by 7 m. The scheme utilizes only fixed magnetic fields including injection and extraction. The hardware requirements are not very demanding, making it straightforward to implement

  7. The flight test of Pi-SAR(L) for the repeat-pass interferometric SAR

    Science.gov (United States)

    Nohmi, Hitoshi; Shimada, Masanobu; Miyawaki, Masanori

    2006-09-01

    This paper describes the experiment of the repeat pass interferometric SAR using Pi-SAR(L). The air-borne repeat-pass interferometric SAR is expected as an effective method to detect landslide or predict a volcano eruption. To obtain a high-quality interferometric image, it is necessary to make two flights on the same flight pass. In addition, since the antenna of the Pi-SAR(L) is secured to the aircraft, it is necessary to fly at the same drift angle to keep the observation direction same. We built a flight control system using an auto pilot which has been installed in the airplane. This navigation system measures position and altitude precisely with using a differential GPS, and the PC Navigator outputs a difference from the desired course to the auto pilot. Since the air density is thinner and the speed is higher than the landing situation, the gain of the control system is required to be adjusted during the repeat pass flight. The observation direction could be controlled to some extent by adjusting a drift angle with using a flight speed control. The repeat-pass flight was conducted in Japan for three days in late November. The flight was stable and the deviation was within a few meters for both horizontal and vertical direction even in the gusty condition. The SAR data were processed in time domain based on range Doppler algorism to make the complete motion compensation. Thus, the interferometric image processed after precise phase compensation is shown.

  8. A Partial Double-Pass S-Band Erbium-Doped Fibre Amplifier

    Institute of Scientific and Technical Information of China (English)

    Sulaiman Wadi Harun; Nor Kamilah Saat; Harith Ahmad

    2005-01-01

    @@ An efficient and low noise short wavelength band erbium-doped fibre amplifier (S-band EDFA) is proposed and demonstrated using double-pass configuration. This amplifier provides a gain of 1500 nm signal as high as 26.9 dB,which is 9.6 dB higher than the two-stage single-pass amplifier. The corresponding noise figure obtained is 7.5 dB,which is of the same level as in the single-pass amplifier and more than 2dB lower than the previously reported double-pass amplifier [IEICE Electron. Express 2 (2005) 182]. The gain enhancement is due to the double pass-propagation of the test signal in the second stage, which increases the effective erbium-doped fibre (EDF)length. The low noise is attributed to the optical circulator between EDFs, which prevents the backward amplified spontaneous emission from propagating into the input part of the amplifier. The proposed amplifier is expected to play an important role in the development of a practical S-band EDFA.

  9. Evaluation of allograft perfusion by radionuclide first-pass study in renal failure following renal transplantation

    Energy Technology Data Exchange (ETDEWEB)

    Baillet, G.; Ballarin, J.; Urdaneta, N.; Campos, H.; Vernejoul, P. de; Fermanian, J.; Kellershohn, C.; Kreis, H.

    1986-04-01

    To assess the diagnostic value of indices measured on a first-pass curve, we performed 72 radionuclide renal first-pass studies (RFP) in 21 patients during the early weeks following renal allograft transplantation. The diagnosis was based on standard clinical and biochemical data and on fine needle aspiration biopsy (FNAB) of the transplant. Aortic and renal first-pass curves were filtered using a true low-pass filter and five different indices of renal perfusion were computed, using formulae from the literature. Statistical analysis performed on the aortic and renal indices indicated excellent reproducibility of the isotopic study. Although renal indices presented a rather large scatter, they all discriminated well between normal and rejection. Three indices have a particularly good diagnostic value. In the discrimination between rejection and Acute Tubular Necrosis (ATN), only one index gave satisfying results. The indices, however, indicate that there are probably ATN with an alternation of renal perfusion and rejection episodes where perfusion is almost intact. We conclude that radionuclide first-pass study allows accurate and reproducible quantitation of renal allograft perfusion. The measured parameters are helpful to follow up the course of a post-transplantation renal failure episode and to gain more insight into renal ischemia following transplantation.

  10. Thermal Fission Rate Calculated Numerically by Particles Multi-passing over Saddle Point

    Institute of Scientific and Technical Information of China (English)

    LIU Ling; BAO Jing-Dong

    2004-01-01

    Langevin simulation of the particles multi-passing over the saddle point is proposed to calculate thermal fission rate. Due to finite friction and the corresponding thermal fluctuation, a backstreaming exists in the process of the particle descent from the saddle to the scission. This leads to that the diffusion behind the saddle point has influence upon the stationary flow across the saddle point. A dynamical correction factor, as a ratio of the flows of multi- and firstoverpassing the saddle point, is evaluated analytically. The results show that the fission rate calculated by the particles multi-passing over the saddle point is lower than the one calculated by the particle firstly passing over the saddle point,and the former approaches the results at the scission point.

  11. Strategies for lowering attrition rates and raising NCLEX-RN pass rates.

    Science.gov (United States)

    Higgins, Bonnie

    2005-12-01

    This study was designed to determine strategies to raise the NCLEX-RN pass rate and lower the attrition rate in a community college nursing program. Ex-post facto data were collected from 213 former nursing student records. Qualitative data were collected from 10 full-time faculty, 30 new graduates, and 45 directors of associate degree nursing programs in Texas. The findings linked the academic variables of two biology courses and three components of the preadmission test to completion of the nursing program. A relationship was found between one biology course, the science component of the preadmission test, the HESI Exit Examination score, and the nursing skills course to passing the NCLEX-RN. Qualitative data indicated preadmission requirements, campus counselors, remediation, faculty, test-item writing, and teaching method were instrumental in completion of the program and passing the NCLEX-RN.

  12. First-time NCLEX-RN pass rate: measure of program quality or something else?

    Science.gov (United States)

    Taylor, Heidi; Loftin, Collette; Reyes, Helen

    2014-06-01

    The first-time NCLEX-RN(®) pass rate is considered by many to be the primary, if not sole, indicator of the quality of prelicensure nursing education programs. Used by state boards of nursing, educational program accreditors, and nursing faculty, the first-time NCLEX-RN pass rate influences important decisions about overall program quality, admission and progression policies, curricula, and teaching and learning practices. In this article, the authors call for a professional dialogue about the use of first-time pass rate (F-TPR) as an indicator of program quality, offer alternative methods for using the F-TPR as one measure of program quality, and suggest further research. One program's experience with low F-TPRs is offered as an exemplar of the unintended negative consequences that occur when the F-TPR is used as a sole criterion by a state board of nursing in judging a program's quality.

  13. Thin-disk laser pump schemes for large number of passes and moderate pump source quality.

    Science.gov (United States)

    Schuhmann, Karsten; Hänsch, Theodor W; Kirch, Klaus; Knecht, Andreas; Kottmann, Franz; Nez, Francois; Pohl, Randolf; Taqqu, David; Antognini, Aldo

    2015-11-10

    Thin-disk laser pump layouts yielding an increased number of passes for a given pump module size and pump source quality are proposed. These layouts result from a general scheme based on merging two simpler pump optics arrangements. Some peculiar examples can be realized by adapting standard, commercially available pump optics with an additional mirror pair. More pump passes yield better efficiency, opening the way for the usage of active materials with low absorption. In a standard multipass pump design, scaling of the number of beam passes brings about an increase in the overall size of the optical arrangement or an increase in the pump source quality requirements. Such increases are minimized in our scheme, making them eligible for industrial applications.

  14. Analysis of Al-Cu Bimetallic Bars Properties After Explosive Welding and Rolling in Modified Passes

    Directory of Open Access Journals (Sweden)

    Mróz S.

    2015-04-01

    Full Text Available The paper presents the results of the experimental tests of Al-Cu bimetallic bars rolling process in multi-radial modified passes. The bimetallic bars consist of aluminium core, grade 1050A and copper outer layer, grade M1E. The stocks were round bars with diameter 22 mm with a copper layer share of 15 and 30%. As a result of rolling in four passes, bars of a diameter of about 16.0 mm were obtained. A bimetallic stock was manufactured using an explosive welding method. The use of the designed arrangement of multi-radial modified stretching passes resulted in obtaining Al-Cu bimetallic bars with the required lateral dimensions, an uniform distribution of the cladding layer over the bar perimeter and high quality of shear strength between individual layers.

  15. Bayesian method for system reliability assessment of overlapping pass/fail data

    Institute of Scientific and Technical Information of China (English)

    Zhipeng Hao; Shengkui Zeng; Jianbin Guo

    2015-01-01

    For high reliability and long life systems, system pass/fail data are often rare. Integrating lower-level data, such as data drawn from the subsystem or component pass/fail testing, the Bayesian analysis can improve the precision of the system reli-ability assessment. If the multi-level pass/fail data are overlapping, one chal enging problem for the Bayesian analysis is to develop a likelihood function. Since the computation burden of the existing methods makes them infeasible for multi-component systems, this paper proposes an improved Bayesian approach for the system reliability assessment in light of overlapping data. This approach includes three steps: fristly searching for feasible paths based on the binary decision diagram, then screening feasible points based on space partition and constraint decomposition, and final y sim-plifying the likelihood function. An example of a satel ite rol ing control system demonstrates the feasibility and the efficiency of the proposed approach.

  16. Application of Feedforward Adaptive Active-Noise Control for Reducing Blade Passing Noise in Centrifugal Fans

    Science.gov (United States)

    WU, J.-D.; BAI, M. R.

    2001-02-01

    This paper describes two configurations of feedforward adaptive active-noise control (ANC) technique for reducing blade passing noise in centrifugal fans. In one configuration, the control speaker is installed at the cut-off region of the fan, while in the other configuration at the exit duct. The proposed ANC system is based on the filtered-x least-mean-squares (FXLMS) algorithm with multi-sine synthesized reference signal and frequency counting and is implemented by using a digital signal processor (DSP). Experiments are carried out to evaluate the proposed system for reducing the noise at the blade passing frequency (BPF) and its harmonics at various flow speeds. The results of the experiment indicated that the ANC technique is effective in reducing the blade passing noise for two configurations by using the feedforward adaptive control.

  17. Energy and exergy analysis in double-pass solar air heater

    Indian Academy of Sciences (India)

    P VELMURUGAN; R KALAIVANAN

    2016-03-01

    In this study, an attempt is made to improve the energy and exergy performance of solar air heater by employing double pass with different absorber surface geometries (roughened, finned, and v-corrugated wire mesh) in the second pass, and also by mounting longitudinal fins in the back side of the absorber plate (first pass). The effect of varied mass flow rate and solar intensity on temperature rise of air, energy efficiency, exergy gain and pressure drop at steady state condition was determined for different types of solar air heaters utilizing an indoor solar simulator. The temperature rise of air, thermal efficiency and exergy gain depends on mass flow rate, surface geometries of absorber and solar intensity, whereas the pressure drop depends on mass flow rate andsurface geometries of absorber.

  18. Laboratory Studies of the Stratified Rotating Flow Passing over an Isolated Obstacle

    Institute of Scientific and Technical Information of China (English)

    高守亭; 平凡

    2003-01-01

    We study the flow of a density-stratified fluid passing over an isolated obstacle, using towing-tank experiments.Our special concern is the response of the flow with different Froude numbers passing over a three-dimensional obstacle. A series of experiments of the stratified rotating flow passing over an isolated obstacle was carried out with the towering-tank controlled by the similarity laws and dynamic non-dimension parameters. These experiments show that the Froude number is a very important parameter, and the lee wave and the eddy structure appear simultaneously under an appropriate conditions. The effect of rotation on the lee wave is mainly to change wave amplitude, particularly to restrain the development of the lee wave and to promote the formation of an eddy.

  19. Combined first pass and equilibrium radionuclide cardiographic determination of stroke volume for quantitation of valvular regurgitation

    DEFF Research Database (Denmark)

    Kelbaek, H; Aldershvile, J; Svendsen, Jesper Hastrup

    1988-01-01

    A new noninvasive procedure for quantitation of cardiac valve regurgitation was evaluated using a combination of first pass and gated equilibrium radionuclide cardiography in 38 subjects with and without cardiac valve disease. Left-sided cardiac catheterization was performed to determine the seve......A new noninvasive procedure for quantitation of cardiac valve regurgitation was evaluated using a combination of first pass and gated equilibrium radionuclide cardiography in 38 subjects with and without cardiac valve disease. Left-sided cardiac catheterization was performed to determine...... with mild mitral incompetence and 2+ aortic regurgitation, 37% in patients with moderate mitral incompetence and 3+ aortic regurgitation and 57% in patients with severe mitral incompetence and 4+ aortic regurgitation. These findings suggest that combined first pass and gated equilibrium radionuclide...

  20. First-pass metabolism of ethanol in human beings: effect of intravenous infusion of fructose

    DEFF Research Database (Denmark)

    Parlesak, Alexandr; Billinger, MH; Schäfer, C.

    2004-01-01

    Intravenous infusion of fructose has been shown to enhance reduced form of nicotinamide adenine dinucleotide reoxidation and, thereby, to enhance the metabolism of ethanol. In the current study, the effect of fructose infusion on first-pass metabolism of ethanol was studied in human volunteers....... A significantly higher first-pass metabolism of ethanol was obtained after administration of fructose in comparison with findings for control experiments with an equimolar dose of glucose. Because fructose is metabolized predominantly in the liver and can be presumed to have virtually no effects in the stomach......, results of the current study support the assumption that only a negligible part of first-pass metabolism of ethanol occurs in the stomach....

  1. The threshold reduction of SRS in deuterium by multi-pass configuration

    Science.gov (United States)

    Liu, Dong; Cai, Xianglong; Li, Zhonghui; Xia, Xusheng; Zhou, Dongjian; Li, Gang; Cai, Hongxing; Guo, Jingwei; Jin, Yuqi

    2016-11-01

    Stimulated Raman scattering (SRS) in compressed D2 gas pumped with nanosecond laser radiation at 1064 nm in a multi-pass configuration has been studied. The influence of D2 pressure and pass number on Raman thresholds and the conversion efficiencies for the first Stokes (S1) and second Stokes (S2) components has been investigated. It is shown that multi-pass configuration is very efficient for the substantial reducing of SRS thresholds for both S1 and S2 components and increasing their conversion efficiencies. In our work, the S1 threshold is approximately one order of magnitude lower than that reported in previous studies; the S1 conversion efficiency reached (56.1±4.4)% at pump energy of 33 mJ. The lowest S2 threshold in the experiment is 15 mJ (with a peak power of 3 MW), and the S2 conversion efficiency reaches (32.9±3.8)%.

  2. Is the pass/fail system applicable to a medical school in Korea?

    Science.gov (United States)

    Kim, Mee Young

    2007-01-01

    To determine whether a pass/fail system is more appropriate for medical education instead of a grade-based system, a survey of medical students and faculty members of Hallym University, Korea, was taken. A questionnaire was delivered to 54 junior students and 36 faculty members from a medical school in Korea and analyzed. Of these participants, 37.7% of students and 36.1% of faculty agreed to the pass/fail system, while 28.3% of students and 52.8% of faculty objected to it. The most frequent reason for objection was the potential decrease in learning achievement. A pass/fail system should be considered after persuasion of the students and faculty to think positively of this system.

  3. Stagnant loop syndrome resulting from small-bowel irradiation injury and intestinal by-pass

    Energy Technology Data Exchange (ETDEWEB)

    Swan, R.W.

    1974-01-01

    Stagnant or blind-loop syndrome includes vitamin B12 malabsorption, steatorrhea, and bacterial overgrowth of the small intestine. A case is presented to demonstrate this syndrome occurring after small-bowel irradiation injury with exaggeration postenterocolic by-pass. Alteration of normal small-bowel flora is basic to development of the stagnant-loop syndrome. Certain strains of bacteria as Bacteriodes and E. coli are capable of producing a malabsorption state. Definitive therapy for this syndrome developing after severe irradiation injury and intestinal by-pass includes antibiotics. Rapid symptomatic relief from diarrhea and improved malabsorption studies usually follow appropriate antibiotic therapy. Recolonization of the loop(s) with the offending bacterial species may produce exacerbation of symptoms. Since antibiotics are effective, recognition of this syndrome is important. Foul diarrheal stools should not be considered a necessary consequence of irradiation injury and intestinal by-pass.

  4. Characteristics of Multiple-Pass Heat Exchanger with Melting of Falling Snow

    Science.gov (United States)

    Ishikawa, Nobuyuki; Aoki, Kazuo; Hattori, Masaru; Kobayashi, Yoshiharu

    The structure of a multiple-pass heat exchanger composed of pipes and plate fins is similar to that of heat exchangers used for melting snow. In this study, we investigated the characteristics of a multiple-pass heat exchanger having two types, a regular pitch type and an irregular one, focusing on the brine pipe pitch of the multiple-pass heat exchanger. The perfect melting condition and the melting efficiency were related to the dimensionless parameters of the heat exchanger and its operating conditions. The calculated results for the perfect melting condition and the melting efficiency agreed with the results obtained from field tests on melting of falling snow. Applying the irregular pitch extends the critical condition for perfect melting when the flow rate of brine is low or the area for melting of falling snow is large. Also, the melting efficiency of the irregular pitch is higher than that of the regular pitch.

  5. EXCHANGE RATE PASS-THROUGH, IMPORT PRICES AND INFLATION UNDER STRUCTURAL BREAKS

    Directory of Open Access Journals (Sweden)

    Arintoko Arintoko

    2011-09-01

    Full Text Available This research estimates the exchange rate pass-through (ERPT into import prices by applying an extension of the basic model of ERPT on Indonesia. It estimates models of cointegration and error-correction mechanism (ECM, with and without structural breaks. It uses the techniques of Zivot-Andrews and of Gregory-Hansen to test for structural breaks and cointegration with the structural breaks, respectively. The results show that with the control variables, inflation affects import prices and lower the pass-through for short term, in a condition of free floating exchange rate. In the short term, with the inclusion of structural breaks, significant inflation affects import prices and lowers the ERPT coefficient.  Keywords:    Exchange rate pass-through, inflation, structural breaks, cointegration, error-correction mechanismJEL classification numbers: C22, C32, E31, F41

  6. Passing crisis and emergency risk communications: the effects of communication channel, information type, and repetition.

    Science.gov (United States)

    Edworthy, Judy; Hellier, Elizabeth; Newbold, Lex; Titchener, Kirsteen

    2015-05-01

    Three experiments explore several factors which influence information transmission when warning messages are passed from person to person. In Experiment 1, messages were passed down chains of participants using five different modes of communication. Written communication channels resulted in more accurate message transmission than verbal. In addition, some elements of the message endured further down the chain than others. Experiment 2 largely replicated these effects and also demonstrated that simple repetition of a message eliminated differences between written and spoken communication. In a final field experiment, chains of participants passed information however they wanted to, with the proviso that half of the chains could not use telephones. Here, the lack of ability to use a telephone did not affect accuracy, but did slow down the speed of transmission from the recipient of the message to the last person in the chain. Implications of the findings for crisis and emergency risk communication are discussed.

  7. Defocusing Techniques for Multi-pass Laser Welding of Austenitic Stainless Steel

    Science.gov (United States)

    Karhu, Miikka; Kujanpää, Veli

    This study introduces an experimental work carried out in multi-pass laser welding with cold filler wire and laser-arc hybrid welding of thick section austenitic stainless steel. As it has been demonstrated earlier, hybrid and cold wire welding with a keyhole-mode can offer very efficient way to produce multi-pass welds in narrow gap thick section joints. However, when multi-pass welding is applied to one pass per layer method without e.g. scanning or defocusing, the used groove width needs to be very narrow in order to ensure the proper melting of groove side walls and thus to avoid lack of fusion/cold-run defects. As a consequence of the narrow groove, particularly in thick section joints, the accessibility of an arc torch or a wire nozzle into the very bottom of a groove in root pass welding can be considerably restricted. In an alternative approach described in this paper, a power density of a laser beam spot was purposely dispersed by using a defocusing technique. In groove filling experiments, a power density of defocused laser beam was kept in the range, which led the welding process towards to conduction limited regime and thus enabled to achieve broader weld cross-sections. The object was to study the feasibility of defocusing as a way to fill and bridge wider groove geometries than what can be welded with focused keyhole-mode welding with filler addition. The paper covers the results of multi-pass welding of up to 60 mm thick joints with single side preparations.

  8. A nomogram to predict the probability of passing the American Board of Internal Medicine examination

    Directory of Open Access Journals (Sweden)

    Andrei Brateanu

    2012-10-01

    Full Text Available Background : Although the American Board of Internal Medicine (ABIM certification is valued as a reflection of physicians’ experience, education, and expertise, limited methods exist to predict performance in the examination. Purpose : The objective of this study was to develop and validate a predictive tool based on variables common to all residency programs, regarding the probability of an internal medicine graduate passing the ABIM certification examination. Methods : The development cohort was obtained from the files of the Cleveland Clinic internal medicine residents who began training between 2004 and 2008. A multivariable logistic regression model was built to predict the ABIM passing rate. The model was represented as a nomogram, which was internally validated with bootstrap resamples. The external validation was done retrospectively on a cohort of residents who graduated from two other independent internal medicine residency programs between 2007 and 2011. Results : Of the 194 Cleveland Clinic graduates used for the nomogram development, 175 (90.2% successfully passed the ABIM certification examination. The final nomogram included four predictors: In-Training Examination (ITE scores in postgraduate year (PGY 1, 2, and 3, and the number of months of overnight calls in the last 6 months of residency. The nomogram achieved a concordance index (CI of 0.98 after correcting for over-fitting bias and allowed for the determination of an estimated probability of passing the ABIM exam. Of the 126 graduates from two other residency programs used for external validation, 116 (92.1% passed the ABIM examination. The nomogram CI in the external validation cohort was 0.94, suggesting outstanding discrimination. Conclusions : A simple user-friendly predictive tool, based on readily available data, was developed to predict the probability of passing the ABIM exam for internal medicine residents. This may guide program directors’ decision

  9. A dual-pass data assimilation scheme for estimating turbulent fluxes with FY3A data

    Directory of Open Access Journals (Sweden)

    T. R. Xu

    2012-07-01

    Full Text Available A dual-pass data assimilation scheme is developed to improve predictions of turbulent fluxes with FY3A land surface temperature (LST data. This scheme is constructed based on the ensemble Kalman filter (EnKF and common land model (CoLM. Pass 1 of the dual-pass data assimilation scheme optimizes model vegetation parameters at a long temporal scale and pass 2 optimizes soil moisture at a short temporal scale. Four sites are selected for the data assimilation experiments, namely Arou, BJ, Guantao, and Miyun in the People's Republic of China (PRC that include grass, alpine meadow, crop, and orchard land cover types. The results are compared with data generated by a multi-scale turbulent flux observation system that includes an eddy covariance (EC and a large aperture scintillometer (LAS system. Results indicate that the CoLM can simulate the diurnal variations of turbulent flux, but usually underestimates the latent heat flux and evaporation fraction (EF and overestimates sensible heat flux. With the assimilation of FY3A LST data, the dual-pass data assimilation scheme can improve the predictions of turbulent flux. The average root mean square error (RMSE values drop from 81.2 to 39.6 W m−2 and from 101.7 to 58.9 W m−2 (the RMSE values drop 51.2% and 42.1% for sensible and latent heat fluxes, respectively. To compare the results with LAS measurements, the source areas are calculated using a footprint model and overlaid with FY3A pixels since the LAS cover more than one FY3A pixel. The comparisons show that the assimilation results are closer to LAS measurements. With the dual-pass data assimilation scheme, the estimated soil moistures are generally closer to observations. Furthermore, the vegetation parameters are retrieved and incorporated into CoLM which enhanced the model's predictive abilities.

  10. A novel SFG structure for C-T high-pass filters

    DEFF Research Database (Denmark)

    Nielsen, Ivan Riis

    1993-01-01

    A signal flow graph (SFG) structure for simulating passive high-pass ladder filters, called the incremental integration structure, is proposed. The structure requires the use of integrators with nonintegrating inputs, and an implementation based on the MOSFET-C technique is discussed. The increme......A signal flow graph (SFG) structure for simulating passive high-pass ladder filters, called the incremental integration structure, is proposed. The structure requires the use of integrators with nonintegrating inputs, and an implementation based on the MOSFET-C technique is discussed...

  11. MPWide: a light-weight library for efficient message passing over wide area networks

    Directory of Open Access Journals (Sweden)

    Derek Groen

    2013-12-01

    Full Text Available We present MPWide, a light weight communication library which allows efficient message passing over a distributed network. MPWide has been designed to connect application running on distributed (supercomputing resources, and to maximize the communication performance on wide area networks for those without administrative privileges. It can be used to provide message-passing between application, move files, and make very fast connections in client-server environments. MPWide has already been applied to enable distributed cosmological simulations across up to four supercomputers on two continents, and to couple two different bloodflow simulations to form a multiscale simulation.

  12. Integrating marker passing and problem solving a spreading activation approach to improved choice in planning

    CERN Document Server

    Hendler, James A

    2014-01-01

    A recent area of interest in the Artificial Intelligence community has been the application of massively parallel algorithms to enhance the choice mechanism in traditional AI problems. This volume provides a detailed description of how marker-passing -- a parallel, non-deductive, spreading activation algorithm -- is a powerful approach to refining the choice mechanisms in an AI problem-solving system. The author scrutinizes the design of both the algorithm and the system, and then reviews the current literature and research in planning and marker passing. Also included: a comparison of this

  13. Double-pass variants for multi-shift BiCGstab(ell)

    CERN Document Server

    Heybrock, Simon

    2010-01-01

    In analogy to Neuberger's double-pass algorithm for the Conjugate Gradient inversion with multi-shifts we introduce a double-pass variant for BiCGstab(ell). One possible application is the overlap operator of QCD at non-zero chemical potential, where the kernel of the sign function is non-Hermitian. The sign function can be replaced by a partial fraction expansion, requiring multi-shift inversions. We compare the performance of the new method with other available algorithms, namely partial fraction expansions with restarted FOM inversions and the Krylov-Ritz method using nested Krylov subspaces.

  14. Survival of Juvenile Chinook Salmon Passing the Bonneville Dam Spillway in 2007

    Energy Technology Data Exchange (ETDEWEB)

    Ploskey, Gene R.; Weiland, Mark A.; Hughes, James S.; Zimmerman, Shon A.; Durham, Robin E.; Fischer, Eric S.; Kim, Jina; Townsend, R. L.; Skalski, J. R.; Buchanan, Rebecca A.; McComas, Roy L.

    2008-12-01

    The U.S. Army Corps of Engineers Portland District (CENWP) funds numerous evaluations of fish passage and survival on the Columbia River. In 2007, the CENWP asked Pacific Northwest National Laboratory to conduct an acoustic telemetry study to estimate the survival of juvenile Chinook salmon passing the spillway at Bonneville Dam. This report documents the study results which are intended to be used to improve the conditions juvenile anadromous fish experience when passing through the dams that the Corps operates on the river.

  15. Effect of nonlinearity in the pass-through optics on femtosecond laser filament in air

    CERN Document Server

    Dergachev, Alexander A; Kandidov, Valery P; Mokrousova, Daria V; Seleznev, Leonid V; Sinitsyn, Dmitry V; Sunchugasheva, Elena S; Shlenov, Svyatoslav A; Shustikova, Anna P

    2014-01-01

    An influence of pass-through optics on femtosecond laser pulse filamentation in ambient air is analyzed for the first time both experimentally and numerically. Propagation of high-power femtosecond laser pulse through solid optical elements introduces spatiotemporal phase modulation due to the Kerr effect. This modulation may have a strong ef-fect on the pulse filamentation in air. We demonstrated that the phase modulation obtained in the thin pass-through dielectric plate reduces the distance to the filament onset and increases the plasma channel length

  16. High-density polyethylene pipe: A new material for pass-by passive integrated transponder antennas

    Science.gov (United States)

    Kazyak, David C.; Zydlewski, Joseph

    2012-01-01

    Pass-by passive integrated transponder (PIT) antennas are widely used to study the movements of fish in streams. At many sites, stream conditions make it difficult to maintain antennas and obtain a continuous record of movement. We constructed pass-by PIT antennas by using high-density polyethylene (HDPE) and found them to be robust to high flows and winter ice flows. Costs for HDPE antennas were similar to those of traditional polyvinyl chloride (PVC) antennas, although construction was somewhat more complicated. At sites where PVC antennas are frequently damaged, HDPE is a durable and economical alternative for PIT antenna construction.

  17. Meteorological Data near Rabbit Ears Pass, Colorado, U.S.A., 1984-2008

    Science.gov (United States)

    Halm, Douglas R.; Beaver, Larry D.; Leavesley, George H.; Reddy, Michael M.

    2009-01-01

    In 1983, a snowmelt energy budget study was initiated by the U.S. Geological Survey on a small watershed near Rabbit Ears Pass, Colorado, to better understand snowmelt processes. The study included data collection from hydrological and meteorological instrumentation. Interest in long term, high-altitude meteorological sites has increased recently due to the increased awareness of global climate change. The meteorological data collected near Rabbit Ears Pass may aid researchers involved in global climate change studies. Meteorological data from 1984 to 2008 are presented.

  18. Microstructure and texture evolution in multi-pass warm rolled AZ31 magnesium alloy

    Directory of Open Access Journals (Sweden)

    Liu Di

    2015-01-01

    Full Text Available Electron Backscatter Diffraction (EBSD is employed to characterize the microstructure and texture established during the process of warm rolled AZ31 magnesium alloy sheets. The grain size was refined from 17.4 μm to 3.8 μm after 4 pass rolling. Texture of as-rolled sheets was expressed by (0002 basal texture, and the texture intensity was increased with the rolling pass increasing. The mechanical properties of as-rolled sheets were greatly improved by warm rolling.

  19. Optimum design of low-pass switched-capacitor ladder filters

    Science.gov (United States)

    Davis, R. D.; Trick, T. N.

    1980-06-01

    A general technique for realizing Bruton's LDI transformation in low-pass switched-capacitor ladder filters is presented, which results in switched-capacitor integrators that are insensitive to parasitic capacitances. It is shown that the correct filter response may be obtained by realizing only the stable poles of the LDI transformed LC network. Realization of these 'stable' poles is reduced to the problem of solving a system of nonlinear equations. The design of a third-order Chebyshev low-pass filter is presented as an example.

  20. Imaging diagnosis of right ventricular infarction and tricuspid regurgitation by radionuclide first pass method

    Energy Technology Data Exchange (ETDEWEB)

    Koito, Hitoshi; Iwasaka, Toshiji; Yoshioka, Hiroshi (Kansai Medical School, Moriguchi, Osaka (Japan))

    1983-07-01

    Radionuclide first pass findings of right ventricular infarction and tricuspid regurgitation are reported. Findings of right ventricular infarction are reduced wall motion and regional ejection fraction in the right ventricular inferior wall. Tricuspid regurgitation is suggested when the dilatation of right atrium and right ventricle are seen with regurgitant RI images through tricuspid valve. We can get regurgitant fraction from time-activity curve. Dynamic images are also useful for assessing quality of right ventricular infarction and tricuspid regurgitation. We conclude that radionuclide first pass method is useful to diagnose right ventricular infarction and to quantify tricuspid regurgitation.