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Sample records for jump types sj

  1. Stick-Jump (SJ) Evaporation of Strongly Pinned Nanoliter Volume Sessile Water Droplets on Quick Drying, Micropatterned Surfaces.

    Science.gov (United States)

    Debuisson, Damien; Merlen, Alain; Senez, Vincent; Arscott, Steve

    2016-03-22

    We present an experimental study of stick-jump (SJ) evaporation of strongly pinned nanoliter volume sessile water droplets drying on micropatterned surfaces. The evaporation is studied on surfaces composed of photolithographically micropatterned negative photoresist (SU-8). The micropatterning of the SU-8 enables circular, smooth, trough-like features to be formed which causes a very strong pinning of the three phase (liquid-vapor-solid) contact line of an evaporating droplet. This is ideal for studying SJ evaporation as it contains sequential constant contact radius (CCR) evaporation phases during droplet evaporation. The evaporation was studied in nonconfined conditions, and forced convection was not used. Micropatterned concentric circles were defined having an initial radius of 1000 μm decreasing by a spacing ranging from 500 to 50 μm. The droplet evaporates, successively pinning and depinning from circle to circle. For each pinning radius, the droplet contact angle and volume are observed to decrease quasi-linearly with time. The experimental average evaporation rates were found to decrease with decreasing pining radii. In contrast, the experimental average evaporation flux is found to increase with decreasing droplet radii. The data also demonstrate the influence of the initial contact angle on evaporation rate and flux. The data indicate that the total evaporation time of a droplet depends on the specific micropattern spacing and that the total evaporation time on micropatterned surfaces is always less than on flat, homogeneous surfaces. Although the surface patterning is observed to have little effect on the average droplet flux-indicating that the underlying evaporation physics is not significantly changed by the patterning-the total evaporation time is considerably modified by patterning, up to a factor or almost 2 compared to evaporation on a flat, homogeneous surface. The closely spaced concentric circle pinning maintains a large droplet radius and

  2. SjAPI, the first functionally characterized Ascaris-type protease inhibitor from animal venoms.

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    Zongyun Chen

    Full Text Available BACKGROUND: Serine protease inhibitors act as modulators of serine proteases, playing important roles in protecting animal toxin peptides from degradation. However, all known serine protease inhibitors discovered thus far from animal venom belong to the Kunitz-type subfamily, and whether there are other novel types of protease inhibitors in animal venom remains unclear. PRINCIPAL FINDINGS: Here, by screening scorpion venom gland cDNA libraries, we identified the first Ascaris-type animal toxin family, which contains four members: Scorpiops jendeki Ascaris-type protease inhibitor (SjAPI, Scorpiops jendeki Ascaris-type protease inhibitor 2 (SjAPI-2, Chaerilus tricostatus Ascaris-type protease inhibitor (CtAPI, and Buthus martensii Ascaris-type protease inhibitor (BmAPI. The detailed characterization of Ascaris-type peptide SjAPI from the venom gland of scorpion Scorpiops jendeki was carried out. The mature peptide of SjAPI contains 64 residues and possesses a classical Ascaris-type cysteine framework reticulated by five disulfide bridges, different from all known protease inhibitors from venomous animals. Enzyme and inhibitor reaction kinetics experiments showed that recombinant SjAPI was a dual function peptide with α-chymotrypsin- and elastase-inhibiting properties. Recombinant SjAPI inhibited α-chymotrypsin with a Ki of 97.1 nM and elastase with a Ki of 3.7 μM, respectively. Bioinformatics analyses and chimera experiments indicated that SjAPI contained the unique short side chain functional residues "AAV" and might be a useful template to produce new serine protease inhibitors. CONCLUSIONS/SIGNIFICANCE: To our knowledge, SjAPI is the first functionally characterized animal toxin peptide with an Ascaris-type fold. The structural and functional diversity of animal toxins with protease-inhibiting properties suggested that bioactive peptides from animal venom glands might be a new source of protease inhibitors, which will accelerate the

  3. [Sjögren syndrome associated with renal tubular acidosis type I].

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    Górriz, L; Molino, R; Arjona, D; Estripeaut, D

    2000-01-01

    Primary Sjögren's Syndrome complicated with a renal tubular acidosis type 1 and hypocalcemic paralysis, as the principal clinical manifestation, is uncommon. Although the initial manifestations of the nephropathy are not well understood, it is believed that the invasion of mononuclear cells and the high level of circulating antibodies, play an important role in the pathogenesis of the disease. We present a patient with hypocalcemic paralysis as an initial manifestation of a latent Sjögren's disease. The glandular biopsy was normal, suggesting a mayor participation of an immunological humoral factor in the renal lesion.

  4. Could the deep squat jump predict weightlifting performance?

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    Vizcaya, Francisco J; Viana, Oscar; del Olmo, Miguel Fernandez; Acero, Rafael Martin

    2009-05-01

    This research was carried out with the aim of describing the deep squat jump (DSJ) and comparing it with the squat (SJ) and countermovement (CMJ) jumps, to introduce it as a strength testing tool in the monitoring and control of training in strength and power sports. Forty-eight male subjects (21 weightlifters, 12 triathletes, and 15 physical education students) performed 3 trials of DSJ, SJ, and CMJ with a 1-minute rest among them. For the weightlifters, snatch and clean and jerk results during the Spanish Championship 2004 and the 35th EU Championships 2007 were collected to study the relationship among vertical jumps and weightlifters' performance. A 1-way analysis of variance (ANOVA) showed significant differences between groups in the vertical jumps, with the highest jumps for the weightlifters and the lowest for the triathletes. An ANOVA for repeated measures (type of jump) showed better results for DSJ and CMJ than SJ in all groups. A linear regression analysis was performed to determine the association between weightlifting and vertical jump performances. Correlations among the weightlifting performance and the vertical jumps were also calculated and determined using Pearson r. Results have shown that both CMJ and DSJ are strongly correlated with weightlifting ability. Therefore, both measures can be useful for coaches as a strength testing tool in the monitoring and control of training in weightlifting.

  5. Kinetic parameters as determinants of vertical jump performance. DOI: 10.5007/1980-0037.2012v14n1p41

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    Saray Giovana dos Santos

    2012-01-01

    Full Text Available The aim of this study was to identify force and velocity parameters related to vertical jump performance in counter movement jump (CMJ and squat jump (SJ, and to compare these parameters between sprint runners and volleyball players. Twenty-four male athletes (12 regional/national-level sprint runners and 12 national-level volleyball players participated in this study. The athletes performed CMJ and SJ on a force platform. The following variables were analyzed: jump performance (jump height and power, peak velocity (PV, absolute and relative maximum force (Fmax, rate of force development (RFD, and time to reach maximum force (TFmax. In CMJ, jump height was correlated with PV (r=0.97 and normalized Fmax (r=0.47, whereas jump power was significantly correlated with all variables, except for Fmax (r=0.12. In SJ, PV and normalized Fmax were significantly correlated with jump height (r=0.95 and r=0.51, respectively and power (r=0.80 and r=0.87, respectively. In addition, TFmax was inversely correlated with power (r=-0.49. Runners presented higher performance variables (height and power, normalized Fmax and PV than volleyball players in both CMJ and SJ. In conclusion, velocity and maximum force were the main determinants of height and power in the two types of vertical jump. However, explosive force (RFD and TFmax was also important for power production in vertical jumps. Finally, runners presented a better vertical jump performance than volleyball players.

  6. Immediate effects of different types of stretching exercises on badminton jump smash.

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    Jang, Hwi S; Kim, Daeho; Park, Jihong

    2017-04-13

    Since different types of stretching exercises may alter athletic performance, we compared the effects of three types of stretching exercises on badminton jump smash. Sixteen male collegiate badminton players performed one of three different stretching exercises in a counterbalanced order on different days. Static stretching had seven typical stretches, while dynamic stretching involved nine dynamic movements, and resistance dynamic stretching was performed with weighted vests and dumbbells. Before and after each stretching exercise, subjects performed 20 trials of jump smashes. Dependent measurements were the jump heights during jump smashes, velocities of jump-smashed shuttlecocks, and drop points of jump-smashed shuttlecocks. To test the effects of each stretching exercise, we performed mixed model ANOVAs and calculated between-time effect sizes (ES). Each stretching exercise improved the jump heights during jump smashes (type main effect: F2,75= 1.19, p=0.31; static stretching: 22.1%, pstretching: 30.1%, pstretching: 17.7%, p=0.03, ES: 0.98) and velocities of jump-smashed shuttlecocks (type main effect: F2,75= 2.18, p=0.12; static stretching: 5.7%, p=0.61, ES: 0.39; dynamic stretching: 3.4%, p=0.94, ES: 0.28; resistance dynamic stretching: 6%, p=0.50, ES: 0.66). However, there were no differences among the stretching exercises for any measurement. The drop point of jump-smashed shuttlecocks did not change (interaction: F2,75= 0.88, p=0.42). All stretching exercises improved badminton jump smash performance, but we could not determine the best protocol. Since badminton requires high-speed movement and explosive force, we suggest performing dynamic stretching or resistance dynamic stretching.

  7. Effect of Static and Dynamic Stretching on the Diurnal Variations of Jump Performance in Soccer Players

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    Chtourou, Hamdi; Aloui, Asma; Hammouda, Omar; Chaouachi, Anis; Chamari, Karim; Souissi, Nizar

    2013-01-01

    Purpose The present study addressed the lack of data on the effect of different types of stretching on diurnal variations in vertical jump height - i.e., squat-jump (SJ) and countermovement-jump (CMJ). We hypothesized that dynamic stretching could affect the diurnal variations of jump height by producing a greater increase in short-term maximal performance in the morning than the evening through increasing core temperature at this time-of-day. Methods Twenty male soccer players (age, 18.6±1.3 yrs; height, 174.6±3.8 cm; body-mass, 71.1±8.6 kg; mean ± SD) completed the SJ and CMJ tests either after static stretching, dynamic stretching or no-stretching protocols at two times of day, 07:00 h and 17:00 h, with a minimum of 48 hours between testing sessions. One minute after warming-up for 5 minutes by light jogging and performing one of the three stretching protocols (i.e., static stretching, dynamic stretching or no-stretching) for 8 minutes, each subject completed the SJ and CMJ tests. Jumping heights were recorded and analyzed using a two-way analysis of variance with repeated measures (3 [stretching]×2 [time-of-day]). Results The SJ and CMJ heights were significantly higher at 17:00 than 07:00 h (pstretching protocol. These daily variations disappeared (i.e., the diurnal gain decreased from 4.2±2.81% (pstretching due to greater increases in SJ and CMJ heights in the morning than the evening (8.4±6.36% vs. 4.4±2.64%, pstretching on the diurnal variations of SJ and CMJ heights was observed. Conclusion Dynamic stretching affects the typical diurnal variations of SJ and CMJ and helps to counteract the lower morning values in vertical jump height. PMID:23940589

  8. Early environmental conditions shape personality types in a jumping spider

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    Jannis eLiedtke

    2015-12-01

    Full Text Available Individuals of many species across the animal kingdom are found to be less plastic than expected, even in behavioral traits. The existence of consistent behavioral differences between individuals, termed personality differences, is puzzling, since plastic behavior is considered ideal to enable animals to adaptively respond to changes in environmental conditions. In order to elucidate which mechanisms are important for the evolution of personality differences, it is crucial to understand which aspects of the environment are important for the development of personality differences. Here, we tested whether physical or social aspects of the environment during development influence individual differentiation (mean level of behavior using the jumping spider Marpissa muscosa. Furthermore, we assessed whether those behaviors were repeatable, i.e. whether personalities existed. We applied a split-brood design and raised spider siblings in three different environments: a deprived environment with no enrichment, a socially and a physically enriched environment. We focused on exploratory behavior and repeatedly assessed individual behavior in a novel environment and a novel object test. Results show that the environment during development influenced spiders’ exploratory tendencies: spiders raised in enriched environments tended to be more exploratory. Most investigated behaviors were repeatable (i.e. personalities existed across all individuals tested, whereas only few behaviors were also repeatable across individuals that had experienced the same environmental condition. Taken together, our results indicate that external stimuli can influence the development of one aspect of personality, the inter-individual variation (mean level of behavior, in a jumping spider. We also found family by environment interactions on behavioral traits potentially suggesting genetic variation in developmental plasticity.

  9. PRE-ACTIVITY MODULATION OF LOWER EXTREMITY MUSCLES WITHIN DIFFERENT TYPES AND HEIGHTS OF DEEP JUMP

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    Vladimir Mrdakovic

    2008-06-01

    Full Text Available The purpose of this study was to determine modulation of pre- activity related to different types and heights of deep jump. Sixteen male soccer players without experience in deep jumps training (the national competition; 15.0 ± 0.5yrs; weight 61.9 ± 6.1kg; height 1.77 ± 0.07m, who participated in the study, performed three types of deep jump (bounce landing, counter landing, and bounce drop jump from three different heights (40cm, 60cm, and 80cm. Surface EMG device (1000Hz was used to estimate muscle activity (maximal amplitude of EMG - AmaxEMG; integral EMG signal - iEMG of five muscles (mm.gastrocnemii, m.soleus, m.tibialis anterior, m.vastus lateralis within 150ms before touchdown. All the muscles, except m. gastrocnemius medialis, showed systematic increase in pre-activity when platform height was raised. For most of the lower extremity muscles, the most significant differences were between values of pre-activity obtained for 40 cm and 80 cm platforms. While the amount of muscle pre-activity in deep jumps from the heights above and beneath the optimal one did not differ significantly from that generated in deep jumps from the optimal drop height of 60 cm, the patterns of muscle pre-activity obtained for the heights above the optimal one did differ from those obtained for the optimal drop height. That suggests that deep jumps from the heights above the optimal one do not seem to be an adequate exercise for adjusting muscle activity for the impact. Muscle pre-activity in bounce drop jumps differed significantly from that in counter landing and bounce landing respectively, which should indicate that a higher amount of pre-activity generated during bounce drop jumps was used for performing take-offs. As this study included the subjects who were not familiar with deep jumps training, the prospective studies should reveal the results of athletes with previous experience

  10. Effect of static and dynamic stretching on the diurnal variations of jump performance in soccer players.

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    Hamdi Chtourou

    Full Text Available PURPOSE: The present study addressed the lack of data on the effect of different types of stretching on diurnal variations in vertical jump height - i.e., squat-jump (SJ and countermovement-jump (CMJ. We hypothesized that dynamic stretching could affect the diurnal variations of jump height by producing a greater increase in short-term maximal performance in the morning than the evening through increasing core temperature at this time-of-day. METHODS: Twenty male soccer players (age, 18.6±1.3 yrs; height, 174.6±3.8 cm; body-mass, 71.1±8.6 kg; mean ± SD completed the SJ and CMJ tests either after static stretching, dynamic stretching or no-stretching protocols at two times of day, 07:00 h and 17:00 h, with a minimum of 48 hours between testing sessions. One minute after warming-up for 5 minutes by light jogging and performing one of the three stretching protocols (i.e., static stretching, dynamic stretching or no-stretching for 8 minutes, each subject completed the SJ and CMJ tests. Jumping heights were recorded and analyzed using a two-way analysis of variance with repeated measures (3 [stretching]×2 [time-of-day]. RESULTS: The SJ and CMJ heights were significantly higher at 17:00 than 07:00 h (p<0.01 after the no-stretching protocol. These daily variations disappeared (i.e., the diurnal gain decreased from 4.2±2.81% (p<0.01 to 1.81±4.39% (not-significant for SJ and from 3.99±3.43% (p<0.01 to 1.51±3.83% (not-significant for CMJ after dynamic stretching due to greater increases in SJ and CMJ heights in the morning than the evening (8.4±6.36% vs. 4.4±2.64%, p<0.05 for SJ and 10.61±5.49% vs. 6.03±3.14%, p<0.05 for CMJ. However, no significant effect of static stretching on the diurnal variations of SJ and CMJ heights was observed. CONCLUSION: Dynamic stretching affects the typical diurnal variations of SJ and CMJ and helps to counteract the lower morning values in vertical jump height.

  11. Binary jumps in continuum. II. Non-equilibrium process and a Vlasov-type scaling limit

    CERN Document Server

    Finkelshtein, Dmitri; Kutoviy, Oleksandr; Lytvynov, Eugene

    2011-01-01

    Let $\\Gamma$ denote the space of all locally finite subsets (configurations) in $\\mathbb R^d$. A stochastic dynamics of binary jumps in continuum is a Markov process on $\\Gamma$ in which pairs of particles simultaneously hop over $\\mathbb R^d$. We discuss a non-equilibrium dynamics of binary jumps. We prove the existence of an evolution of correlation functions on a finite time interval. We also show that a Vlasov-type mesoscopic scaling for such a dynamics leads to a generalized Boltzmann non-linear equation for the particle density.

  12. Impact of time-inhomogeneous jumps and leverage type effects on returns and realised variances

    DEFF Research Database (Denmark)

    Veraart, Almut

    This paper studies the effect of time-inhomogeneous jumps and leverage type effects on realised variance calculations when the logarithmic asset price is given by a Lévy-driven stochastic volatility model. In such a model, the realised variance is an inconsistent estimator of the integrated...

  13. Jumping Dynamics

    DEFF Research Database (Denmark)

    Sannino, Francesco

    2013-01-01

    We propose an alternative paradigm to the conjectured Miransky scaling potentially underlying the physics describing the transition from the conformally broken to the conformally restored phase when tuning certain parameters such as the number of flavors in gauge theories. According to the new...... paradigm the physical scale and henceforth also the massive spectrum of the theory jump at the lower boundary of the conformal window. In particular we propose that a theory can suddenly jump from a Quantum Chromodynamics type spectrum, at the lower boundary of the conformal window, to a conformal one...... without particle interpretation. The jumping scenario, therefore, does not support a near-conformal dynamics of walking type. We will also discuss the impact of jumping dynamics on the construction of models of dynamical electroweak symmetry breaking....

  14. Effect of different knee starting angles on intersegmental coordination and performance in vertical jumps.

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    Gheller, Rodrigo G; Dal Pupo, Juliano; Ache-Dias, Jonathan; Detanico, Daniele; Padulo, Johnny; dos Santos, Saray G

    2015-08-01

    This study aimed to analyze the effect of different knee starting angles on jump performance, kinetic parameters, and intersegmental coupling coordination during a squat jump (SJ) and a countermovement jump (CMJ). Twenty male volleyball and basketball players volunteered to participate in this study. The CMJ was performed with knee flexion at the end of the countermovement phase smaller than 90° (CMJ(90)), and in a preferred position (CMJ(PREF)), while the SJ was performed from a knee angle of 70° (SJ(70)), 90° (SJ(90)), 110° (SJ(110)), and in a preferred position (SJ(PREF)). The best jump performance was observed in jumps that started from a higher squat depth (CMJ(power was observed in the SJ(110) and CMJ(>90). Analysis of continuous relative phase showed that thigh-trunk coupling was more in-phase in the jumps (CMJ and SJ) performed with a higher squat depth, while the leg-thigh coupling was more in-phase in the CMJ(>90) and SJ(PREF). Jumping from a position with knees more flexed seems to be the best strategy to achieve the best performance. Intersegmental coordination and jump performance (CMJ and SJ) were affected by different knee starting angles.

  15. Innovative Columnar Type of Grid Array SJ BIST HALT Method Project

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    National Aeronautics and Space Administration — Ridgetop will develop a superior method for testing and qualifying columnar type of grid arrays such as field programmable gate arrays (FPGAs) packaged in column...

  16. Risk, Jumps, and Diversification

    DEFF Research Database (Denmark)

    Bollerslev, Tim; Law, Tzuo Hann; Tauchen, George

    We test for price discontinuities, or jumps, in a panel of high-frequency intraday returns for forty large-cap stocks and an equiweighted index from these same stocks. Jumps are naturally classified into two types: common and idiosyncratic. Common jumps affect all stocks, albeit to varying degree...

  17. Oral delivery of the Sj23LHD-GST antigen by Salmonella typhimurium type III secretion system protects against Schistosoma japonicum infection in mice.

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    Guo Chen

    2011-09-01

    Full Text Available BACKGROUND: Schistosomiasis japonica is a zoonotic parasitic disease and oral vaccine delivery system would be benefit for prevention of this disease. Although attenuated salmonella has been used as an antigen expression vector for oral vaccine development, the membrane-bound vacuoles in which bacteria reside hinders the presentation of expressed heterologous antigens to the major histocompatibility complex (MHC molecules. The present work used an attenuated Salmonella typhimurium strain VNP20009 to secretory expression of Sj23LHDGST bivalent antigen from Schistosoma japonicum and tested the protective efficacy against S. japonicum infection in orally immunized mice. METHODOLOGY/PRINCIPAL FINDINGS: Promoters (nirB or pagC were used to express the antigen (Sj23LHDGST and the Salmonella type III or α-hemolysin secretion system was employed to secrete it. The immunoblotting analysis and fluorescent microscopy revealed that the antigen was effectively expressed and delivered to the cytosol of macrophages in vitro. Among recombinant vaccine strains, an engineered VNP20009 which expressed the antigen by nirB promoter and secreted it through type III secretion system (nirB-sopE(1-104-Sj23LHD-GST efficiently protected against S. japonicum infection in a mouse model. This strain elicited a predominantly IgG(2a antibody response and a markedly increase in the production of IL-12 and IFN-γ. The flow cytometric analysis demonstrated that this strain caused T cell activation as evidenced by significantly increased expression of CD44 and CD69. CONCLUSION/SIGNIFICANCE: Oral delivery of antigen by nirB-driven Salmonella typhimurium type III secretion system is a novel, safe, inexpensive, efficient and convenient approach for schistosome vaccine development.

  18. EFFECTS OF ELECTROSTIMULATION AND PLYOMETRIC TRAINING PROGRAM COMBINATION ON JUMP HEIGHT IN TEENAGE ATHLETES

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    Emilio J. Martínez-López

    2012-12-01

    Full Text Available The purpose of this study was to examine the effects of eight- week (2 days/week training periods of plyometric exercises (PT and neuromuscular electrostimulation (EMS on jump height in young athletes. Squat jump (SJ, counter movement jump (CMJ and drop jump (DJ were performed to assess the effects of the training protocols 98 athletes (100 & 200m and 100m & 110m hurdles voluntarily took part in this study, 51 males (52% and 47 females (48%, 17.91 ± 1.42 years old, and 5.16 ± 2.56 years of training experience. The participants were randomly assigned to four different groups according to the frequency and the timing of the stimulation. Analysis of covariance was used to analyze the effects of every training program on jump height. Our findings suggest that compared to control (Plyometrics (PT only, the combination of 150Hz EMS + PT simultaneously combined in an 8 week (2days/week training program, we could observe significant jump height improvements in the different types of strength: explosive, explosive-elastic, and explosive-elastic-reactive. The combination of PT after < 85 Hz EMS did not show any jump height significant increase in sprinters. In conclusion, an eight week training program (with just two days per week of EMS combined with plyometric exercises has proven useful for the improvement of every kind of vertical jump ability required for sprint and hurdles disciplines in teenage athletes

  19. Effects of different types of jump impact on trabecular bone mass and microarchitecture in growing rats.

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    Yong-In Ju

    Full Text Available Substantial evidence from animal studies indicates that jumping increases bone mass and strength. However, most studies have focused on the take-off, rather than the landing phase of jumps. Thus, we compared the effects of landing and upward jump impact on trabecular bone mass and microarchitecture. Male Wistar rats aged 10 weeks were randomly assigned to the following groups: sedentary control (CON, 40-cm upward jumps (40UJ; 40-cm drop jumps (40DJ; and 60-cm drop jumps (60DJ (n = 10 each. The upward jump protocol comprised 10 upward jumps/day, 5 days/week for 8 weeks to a height of 40 cm. The drop jump protocol comprised dropping rats from a height of 40 or 60 cm at the same frequency and time period as the 40UJ group. Trabecular bone mass, architecture, and mineralization at the distal femoral metaphysis were evaluated using microcomputed tomography. Ground reaction force (GRF was measured using a force platform. Bone mass was significantly higher in the 40UJ group compared with the DJ groups (+49.1% and +28.3%, respectively, although peak GRF (-57.8% and -122.7%, respectively and unit time force (-21.6% and -36.2%, respectively were significantly lower in the 40UJ group. These results showed that trabecular bone mass in growing rats is increased more effectively by the take-off than by the landing phases of jumps and suggest that mechanical stress accompanied by muscle contraction would be more important than GRF as an osteogenic stimulus. However, the relevance of these findings to human bone physiology is unclear and requires further study.

  20. Impacts of Two Types of Northward Jumps of the East Asian Upper-tropospheric Jet Stream in Midsummer on Rainfall in Eastern China

    Institute of Scientific and Technical Information of China (English)

    LIN Zhongda

    2013-01-01

    The East Asian upper-tropospheric jet stream (EAJS) typically jumps north of 45°N in midsummer.These annual northward jumps are mostly classified into two dominant types:the first type corresponds to the enhanced westerly to the north of the EAJS's axis (type A),while the second type is related to the weakened westerly within the EAJS's axis (type B).In this study,the impacts of these two types of northward jumps on rainfall in eastern China are investigated.Our results show that rainfall significantly increases in northern Northeast China and decreases in the Yellow River-Huaihe River valleys,as well as in North China,during the type A jump.As a result of the type B jump,rainfall is enhanced in North China and suppressed in the Yangtze River valley.The changes in rainfall in eastern China during these two types of northward jumps are mainly caused by the northward shifts of the ascending air flow that is directly related to the EAJS.Concurrent with the type A (B) jump,the EAJS-related ascending branch moves from the Yangtze-Huai River valley to northern Northeast (North) China when the EAJS's axis jumps from 40°N to 55°N (50°N).Meanwhile,the type A jump also strengthens the Northeast Asian low in the lower troposphere,leading to more moisture transport to northern Northeast China.The type B jump,however,induces a northwestward extension of the lower-tropospheric western North Pacific subtropical high and more moisture transport to North China.

  1. Is the effect of a countermovement on jump height due to active state development?

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    Bobbert, Maarten F; Casius, L J Richard

    2005-03-01

    To investigate whether the difference in jump height between countermovement jumps (CMJ) and squat jumps (SJ) could be explained by a difference in active state during propulsion. Simulations were performed with a model of the human musculoskeletal system comprising four body segments and six muscles. The model's only input was STIM, the stimulation of muscles, which could be switched "off" or "on." After switching "on," STIM increased to its maximum at a fixed rate of change (dSTIM/dt). For various values of dSTIM/dt, stimulation switch times were optimized to produce a maximum height CMJ. From this CMJ, the configuration at the lowest height of the center of gravity (CG) was selected and used as static starting configuration for simulation of SJ. Next, STIM-switch times were optimized to find the maximum height SJ. Simulated CMJ and SJ closely resembled jumps of human subjects. Maximum jump height of the model was greater in CMJ than in SJ, with the difference ranging from 0.4 cm at infinitely high dSTIM/dt to about 2.5 cm at the lowest dSTIM/dt investigated. The greater jump height in CMJ was due to a greater work output of the hip extensor muscles. These muscles could produce more force and work over the first 30% of their shortening range in CMJ, due to the fact that they had a higher active state in CMJ than in SJ. The greater jump height in CMJ than in SJ could be explained by the fact that in CMJ active state developed during the preparatory countermovement, whereas in SJ it inevitably developed during the propulsion phase, so that the muscles could produce more force and work during shortening in CMJ.

  2. Jump-type Hunt processes generated by lower bounded semi-Dirichlet forms

    CERN Document Server

    Fukushima, Masatoshi; 10.1214/10-AOP633

    2012-01-01

    Let $E$ be a locally compact separable metric space and $m$ be a positive Radon measure on it. Given a nonnegative function $k$ defined on $E\\times E$ off the diagonal whose anti-symmetric part is assumed to be less singular than the symmetric part, we construct an associated regular lower bounded semi-Dirichlet form $\\eta$ on $L^2(E;m)$ producing a Hunt process $X^0$ on $E$ whose jump behaviours are governed by $k$. For an arbitrary open subset $D\\subset E$, we also construct a Hunt process $X^{D,0}$ on $D$ in an analogous manner. When $D$ is relatively compact, we show that $X^{D,0}$ is censored in the sense that it admits no killing inside $D$ and killed only when the path approaches to the boundary. When $E$ is a $d$-dimensional Euclidean space and $m$ is the Lebesgue measure, a typical example of $X^0$ is the stable-like process that will be also identified with the solution of a martingale problem up to an $\\eta$-polar set of starting points. Approachability to the boundary $\\partial D$ in finite time o...

  3. Relationships among jumping performances and sprint parameters during maximum speed phase in sprinters.

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    Kale, Mehmet; Aşçi, Alper; Bayrak, Coşkun; Açikada, Caner

    2009-11-01

    The purpose of this study was to investigate the relationships among jumping performances and speed parameters during maximum speed phase in sprinters. Twenty-one men sprinters volunteered to participate at the beginning of the preparation training phase. All tests-including 100-m sprint running, squat jump (SJ), countermovement jump (CMJ), drop jump (DJ), 60-second repetitive jump (RJ), standing long jump (SLJ), standing triple jump (STJ), standing quintuple jump (SQJ), and standing 10-stride jump (STENJ)-were done on switching mats. Flight (FT) and contact times (CT) during the vertical jump tests and 10-m split times during 100-m sprint running were measured by a 2-channel precision timing system (PTS) connected to the mats. The trace marking method was used for measuring the stride length (SL) through 60 m in 100-m sprint running. Stride frequency (SF), maximum velocity (Vmax), jump height for all vertical jumps, and lower-body power in DJ and RJ were calculated. Statistical analysis showed that the highest significant correlation was found between Vmax and DJ height (r = 0.69; p sprint running and SJ (r = 0.39; p sprint running than the other vertical and horizontal jump tests at the beginning of the preparation training phase.

  4. Serum IgA against type 3 muscarinic acetylcholine receptor is a novel marker in diagnosis of Sj(o)gren's syndrome

    Institute of Scientific and Technical Information of China (English)

    LI Ying-ni; GUO Jian-ping; HE Jing; LIU Xia; YIN Fang-mi; DING Yan; YAO Hai-hong; KANG Ai-jun; LI Zhan-guo

    2011-01-01

    Background Antibodies against type 3 muscarinic acetylcholine receptor (M3R) are involved in the pathogenesis of Sj(o)gren's syndrome (SS), but the clinical value of them in SS patients has been controversial. The aims of this study were to: (1) establish an improved enzyme-linked immunosorbent assay (ELISA) to detect IgA antibodies against M3R; (2)evaluate the value of IgA antibodies against the second extracellular loop of M3R205-220 (c2M3RP) in diagnosis of SS.Methods To increase the ELISA sensitivity, c2M3RP was coupled to bovine serum albumin (BSA) by the glutaraldehyde method and a 96-well microplate was treated by ultraviolet rays before coated. Concentrations of anti-c2M3RP, anti-SSA, and anti-SSB were measured in the sera of 240 individuals: 91 patients with primary SS and 149 controls (16 secondary SS, 27 systemic lupus erythematosus, 40 rheumatoid arthritis and 66 healthy controls).Diagnostic properties of anti-c2M3RP were determined by receiver-operating characteristic curve analysis.Results The prevalence of serum IgA anti-c2M3RP antibodies in patients with pSS (46%, 42/91) was significantly higher than that in patients with systemic lupus erythematosus (19%, 5/27), in rheumatoid arthritis (15%, 6/40) and in healthy controls (5%, 3/66). However, there was no significant difference between the two SS groups (P=0.727). The diagnostic performance of IgA anti-M3RP antibodies was similar to anti-SSA assay, but had 22% higher sensitivity than anti-SSB. By analyzing of IgA anti-c2M3RP antibodies, combination of anti-SSA and anti-SSB resulted in increased sensitivity, whereas their specificity was not significantly changed.Conclusions The improved anti-c2M3RP ELISA is a novel, sensitive, and specific serological test for the diagnosis of SS. The combined application of anti-c2M3RP, anti-SSA and anti-SSB tests can improve the laboratory diagnosis of SS.The IgA anti-c2M3RP antibodies may serve as a novel diagnostic marker for SS.

  5. Long Jump

    CERN Document Server

    Dorobantu, V

    2012-01-01

    When the laws of Physics are taken seriously, the sports can benefit in getting better results, as was the case of the high jump in Flop style, so that the athlete sprints diagonally towards the bar,then curve and leap backwards over it. The jumper, in this case, has the center of mass under the bar, fact which allows improvement of the performance.

  6. Influence of stretching on warm up in jump and speed

    OpenAIRE

    Gálvez Ruiz, Pablo; Tapia Flores, A; Jurado Lavanant, A

    2013-01-01

    El objetivo del estudio es determinar si la realización de estiramientos pasivos, incluidos como parte del calentamiento, influyen en el rendimiento de la fuerza explosiva, en este caso en varios tests de salto vertical: Squat Jump (SJ), Countermouvement Jump (CMJ) y Reactive Jump (RJ); y también en un test de velocidad de 30 metros (mts.) con salida lanzada de 5 mts. Para ello, 9 jugadores del Málaga Club de Fútbol de categoría juvenil (18,22 ± 0,441 años) realizaron 2 protocolos de...

  7. Pulmonary manifestations of Sjögren's syndrome.

    Science.gov (United States)

    Flament, Thomas; Bigot, Adrien; Chaigne, Benjamin; Henique, Helene; Diot, Elisabeth; Marchand-Adam, Sylvain

    2016-06-01

    In 9-20% of cases, Sjögren's syndrome is associated with various respiratory symptoms. The most typical manifestations are chronic interstitial lung disease (ILD) and tracheobronchial disease. The most common manifestation of ILD is nonspecific interstitial pneumonia in its fibrosing variant. Other types of ILD, such as organising pneumonia, usual interstitial pneumonia and lymphocytic interstitial pneumonitis, are rare. Their radiological presentation is less distinctive, and definitive diagnosis may require the use of transbronchial or surgical lung biopsy. Corticosteroid therapy is the mainstay of ILD treatment in Sjögren's syndrome, but the use of other immunosuppressive drugs needs to be determined. ILD is a significant cause of death in Sjögren's syndrome. Tracheobronchial disease is common in Sjögren's syndrome, characterised by diffuse lymphocytic infiltration of the airway. It is sometimes responsible for a crippling chronic cough. It can also present in the form of bronchial hyperresponsiveness, bronchiectasis, bronchiolitis or recurrent respiratory infections. The management of these manifestations may require treatment for dryness and/or inflammation of the airways. Airway disease has little effect on respiratory function and is rarely the cause of death in Sjögren's syndrome patients. Rare respiratory complications such as amyloidosis, lymphoma or pulmonary hypertension should not be disregarded in Sjögren's syndrome patients.

  8. Pulmonary manifestations of Sjögren's syndrome

    Directory of Open Access Journals (Sweden)

    Thomas Flament

    2016-06-01

    Full Text Available In 9–20% of cases, Sjögren's syndrome is associated with various respiratory symptoms. The most typical manifestations are chronic interstitial lung disease (ILD and tracheobronchial disease. The most common manifestation of ILD is nonspecific interstitial pneumonia in its fibrosing variant. Other types of ILD, such as organising pneumonia, usual interstitial pneumonia and lymphocytic interstitial pneumonitis, are rare. Their radiological presentation is less distinctive, and definitive diagnosis may require the use of transbronchial or surgical lung biopsy. Corticosteroid therapy is the mainstay of ILD treatment in Sjögren's syndrome, but the use of other immunosuppressive drugs needs to be determined. ILD is a significant cause of death in Sjögren's syndrome. Tracheobronchial disease is common in Sjögren's syndrome, characterised by diffuse lymphocytic infiltration of the airway. It is sometimes responsible for a crippling chronic cough. It can also present in the form of bronchial hyperresponsiveness, bronchiectasis, bronchiolitis or recurrent respiratory infections. The management of these manifestations may require treatment for dryness and/or inflammation of the airways. Airway disease has little effect on respiratory function and is rarely the cause of death in Sjögren's syndrome patients. Rare respiratory complications such as amyloidosis, lymphoma or pulmonary hypertension should not be disregarded in Sjögren's syndrome patients.

  9. Comparison of the Capacity of Different Jump and Sprint Field Tests to Detect Neuromuscular Fatigue.

    Science.gov (United States)

    Gathercole, Rob J; Sporer, Ben C; Stellingwerff, Trent; Sleivert, Gord G

    2015-09-01

    Different jump and sprint tests have been used to assess neuromuscular fatigue, but the test with optimal validity remains to be established. The current investigation examined the suitability of vertical jump (countermovement jump [CMJ], squat jump [SJ], drop jump [DJ]) and 20-m sprint (SPRINT) testing for neuromuscular fatigue detection. On 6 separate occasions, 11 male team-sport athletes performed 6 CMJ, SJ, DJ, and 3 SPRINT trials. Repeatability was determined on the first 3 visits, with subsequent 3 visits (0-, 24-, and 72-hour postexercise) following a fatiguing Yo-Yo running protocol. SPRINT performance was most repeatable (mean coefficient of variation ≤2%), whereas DJ testing (4.8%) was significantly less repeatable than CMJ (3.0%) and SJ (3.5%). Each test displayed large decreases at 0-hour (33 of 49 total variables; mean effect size = 1.82), with fewer and smaller decreases at 24-hour postexercise (13 variables; 0.75), and 72-hour postexercise (19 variables; 0.78). SPRINT displayed the largest decreases at 0-hour (3.65) but was subsequently unchanged, whereas SJ performance recovered by 72-hour postexercise. In contrast, CMJ and DJ performance displayed moderate (12 variables; 1.18) and small (6 variables; 0.53) reductions at 72-hour postexercise, respectively. Consequently, the high repeatability and immediate and prolonged fatigue-induced changes indicated CMJ testing as most suitable for neuromuscular fatigue monitoring.

  10. The mass profile of early-type galaxies in overdense environments: the case of the double source plane gravitational lens SL2SJ02176-0513

    CERN Document Server

    TU, H; Limousin, M; Cabanac, R; Marshall, P J; Fort, B; Treu, T; Péllo, R; Jullo, E; Kneib, J -P; Sygnet, J -F

    2009-01-01

    SL2SJ02176-0513 is a remarkable lens for the presence of two multiply-imaged systems at different redshifts lensed by a foreground massive galaxy at $z_{\\rm lens}=0.656$: a bright cusp arc at $z_{\\rm arc}=1.847$ and an additional double-image system at an estimated redshift of $z_{\\rm dbl}\\sim2.9$ based on photometry and lensing geometry. The system is located about 400 kpc away from the center of a massive group of galaxies. Mass estimates for the group are available from X-ray observations and satellite kinematics. Multicolor photometry provides an estimate of the stellar mass of the main lens galaxy. The lensing galaxy is modeled with two components (stars and dark matter), and we include the perturbing effect of the group environment, and all available constraints. We find that classic lensing degeneracies, e.g. between external convergence and mass density slope, are significantly reduced with respect to standard systems and infer tight constraints on the mass density profile: (i) the dark matter content...

  11. Sjögren's Syndrome

    Science.gov (United States)

    ... protective effects of saliva, you may develop more dental decay (cavities) and mouth infections. Sjögren’s syndrome can also affect other parts of ... rid the mouth of the bacteria that cause dental decay (cavities) and mouth infections, so good oral hygiene is extremely important when ...

  12. Body size and countermovement depth confound relationship between muscle power output and jumping performance

    Science.gov (United States)

    Markovic, Srdjan; Dragan, Mirkov; Nedeljkovic, Aleksandar; Jaric, Slobodan

    2013-01-01

    A number of studies based on maximum vertical jumps have presumed that the maximum jump height reveals the maximum power of lower limb muscles, as well as the tested muscle power output predicts the jumping performance. The objective of the study was to test the hypothesis that both the body size and countermovement depth confound the relationship between the muscle power output and performance of maximum vertical jumps. Sixty young and physically active males were tested on the maximum countermovement (CMJ) and squat jumps (SJ). The jumping performance (Hmax), peak (Ppeak) and the average power output (Pavg) during the concentric phase, countermovement depth (only in CMJ) and body mass as an index of body size were assessed. To assess the power-performance relationship, the correlations between Hmax with both Ppeak and Pavg were calculated without and with controlling for the effects of body mass, as well as for the countermovement depth. The results revealed moderate power-performance relationships (range 0.55SJ jumps. When controlled for body mass, the same values were markedly higher (0.61jumps). When controlled for both the body mass and countermovement depth, CMJ revealed r=0.88 and r=0.77 for Ppeak and Pavg, respectively. Both jumps revealed stronger relationships with Ppeak than with Pavg (p<0.05) when controlled for either body mass or both body mass and countermovement depth. We conclude that both body size (in CMJ and SJ) and countermovement depth (in CMJ) confound the relationship between the muscle power output with the performance of maximum vertical jumps. Regarding routine assessments of muscle power from jumping performance and vice versa, the use of CMJ is recommended, while Ppeak, rather than Pavg, should be the variable of choice. PMID:24280557

  13. Price jumps on European stock markets

    Directory of Open Access Journals (Sweden)

    Jan Hanousek

    2014-03-01

    Full Text Available We analyze the dynamics of price jumps and the impact of the European debt crisis using the high-frequency data reported by selected stock exchanges on the European continent during the period January 2008 to June 2012. We employ two methods to identify price jumps: Method 1 minimizes the probability of false jump detection (the Type-II Error-Optimal price jump indicator and Method 2 maximizes the probability of successful jump detection (the Type-I Error-Optimal price jump indicator. We show that individual stock markets exhibited differences in price jump intensity before and during the crisis. We also show that in general the variance of price jump intensity could not be distinguished as different in the pre-crisis period from that during the crisis. Our results indicate that, contrary to common belief, the intensity of price jumps does not uniformly increase during a period of financial distress. However, there do exist differences in price jump dynamics across stock markets and investors have to model emerging and mature markets differently to properly reflect their individual dynamics.

  14. Reliability of squat and countermovement jump tests in children 6 to 8 years of age.

    Science.gov (United States)

    Acero, Rafael Martin; Fernández-del Olmo, Miguel; Sánchez, Jose Andres; Otero, Xose Luis; Aguado, Xavier; Rodríguez, Ferran A

    2011-02-01

    The aim of this study was to determine the reliability of the squat jump test (SJ) and countermovement jump test (CMJ), in fifty-six children (30 girls and 26 boys) with ages ranging from 6 to 8 years. Each subject performed two evaluation sessions (T1, T2) with seven days between tests. The results show that the CMJ test has a high intratrial reproducibility in T1 and T2 measured through intraclass correlation coefficient (ICC ≥ 0.95). The ICC for the SJ test had a high value (0.99) only in T1. The variability for both tests among children under 9 years of age is higher than those reported for adult subjects in other studies. The intersession reliability was questionable with a high methodical error (ME= 9.86-15.1%, for the SJ and CMJ, respectively) and a significant worsening of the results of CMJ in T2 (p < .05).

  15. The role of rate of force development on vertical jump performance.

    Science.gov (United States)

    McLellan, Christopher P; Lovell, Dale I; Gass, Gregory C

    2011-02-01

    The purpose of this study was to examine a) the relationship between rate of force development (RFD) and vertical jump (VJ) performance during a counter movement jump (CMJ), and b) the reliability of RFD recorded during the CMJ and squat jump (SJ) forms of the VJ. Twenty-three physically active men aged 23 ± 3.9 years participated in the study. Subjects completed 3 unloaded CMJ and 3 unloaded SJ in random order on a force plate. The RFD was measured during CMJ and SJ movements with vertical jump displacement (VJD) measured simultaneously during the CMJ only. Subjects incorporated arm swing to their CMJ technique to reach up as high as possible, and VJD was measured. All SJ were executed with both hands on the hips throughout the full range of movement. Peak rate of force development (PRFD), peak force (PF), and time to peak force (TPF) were significantly correlated to VJD during the CMJ (r = 0.68, r = 0.51, and r = -0.48, respectively). The RFD and TPF during the CMJ and SJ were associated with low test-retest reliability (coefficient of variation [CV]: 11.8-7.9%). Peak and average power, PF, and VJD produced high test-retest reliability (CV: 2.8-5.1%) during both the CMJ and SJ movements. Our results indicate that PRFD, a measure of explosive strength, and PF, a measure of maximal strength, are the primary contributors to VJD during the CMJ in physically active men. However, caution must be used when interpreting data using PRFD because of its low retest reliability.

  16. Periodontal disease in primary Sjögren's Syndrome

    DEFF Research Database (Denmark)

    Schjødt, Morten; Christensen, Lisa Bøge; Petersen, P.E.

    2001-01-01

    Sjögren's syndrome, gingivitis, periodontitis, periodontal disease, xerostomia, oral manifestations......Sjögren's syndrome, gingivitis, periodontitis, periodontal disease, xerostomia, oral manifestations...

  17. Jumping in Arithmetic

    NARCIS (Netherlands)

    Visser, Albert

    2014-01-01

    In this paper we study a new relation between sentences: the jump relation. The idea of the jump relation is based on an analysis of Feferman's Theorem that the inconsistency of a theory U is interpretable over U. The jump relation is based on a converse of Feferman's Theorem: if a sentence is inter

  18. Influence of dorsiflexion shoes on neuromuscular fatigue of the plantar flexors after combined tapping-jumping exercises in volleyball players.

    Science.gov (United States)

    Lapole, Thomas; Ahmaidi, Said; Gaillien, Benjamin; Leprêtre, Pierre-Marie

    2013-07-01

    Dorsiflexion shoes could be useful to increase jumping performance. The aim of the present study was to investigate the impact of wearing shoes inducing moderate dorsiflexion (2°) on neuromuscular fatigue induced by volleyball exercises involving multiple stretch-shortening cycles. Squat jump (SJ) and countermovement jump (CMJ) performance, and plantar flexors isometric voluntary and evoked contractile properties were assessed in 10 unfamiliarized trained volleyball players before and after a 10-minute intensive combined tapping-jumping volleyball exercise performed, in blinded randomized conditions, with neutral (0°) or moderate dorsiflexion (2°). No significant difference was observed on SJ performance in neutral and moderate dorsiflexion conditions. However, CMJ height was initially lower with 2° dorsiflexion compared with 0° (p volleyball exercise also induced a significant decrease in maximal voluntary contraction (p volleyball players.

  19. Effect of creatine supplementation on jumping performance in elite volleyball players.

    Science.gov (United States)

    Lamontagne-Lacasse, Martin; Nadon, Raymond; Goulet E, D B

    2011-12-01

    Jump height is a critical aspect of volleyball players' blocking and attacking performance. Although previous studies demonstrated that creatine monohydrate supplementation (CrMS) improves jumping performance, none have yet evaluated its effect among volleyball players with proficient jumping skills. We examined the effect of 4 wk of CrMS on 1 RM spike jump (SJ) and repeated block jump (BJ) performance among 12 elite males of the Sherbrooke University volleyball team. Using a parallel, randomized, double-blind protocol, participants were supplemented with a placebo or creatine solution for 28 d, at a dose of 20 g/d in days 1-4, 10 g/d on days 5-6, and 5 g/d on days 7-28. Pre- and postsupplementation, subjects performed the 1 RM SJ test, followed by the repeated BJ test (10 series of 10 BJs; 3 s interval between jumps; 2 min recovery between series). Due to injuries (N = 2) and outlier data (N = 2), results are reported for eight subjects. Following supplementation, both groups improved SJ and repeated BJ performance. The change in performance during the 1 RM SJ test and over the first two repeated BJ series was unclear between groups. For series 3-6 and 7-10, respectively, CrMS further improved repeated BJ performance by 2.8% (likely beneficial change) and 1.9% (possibly beneficial change), compared with the placebo. Percent repeated BJ decline in performance across the 10 series did not differ between groups pre- and postsupplementation. In conclusion, CrMS likely improved repeated BJ height capability without influencing the magnitude of muscular fatigue in these elite, university-level volleyball players.

  20. Fast unilateral isometric knee extension torque development and bilateral jump height.

    Science.gov (United States)

    de Ruiter, Cornelis J; Van Leeuwen, Daniel; Heijblom, Arjan; Bobbert, Maarten F; de Haan, Arnold

    2006-10-01

    We hypothesized that the initial rate (first 40 ms) of unilateral knee extensor torque development during a maximally fast isometric contraction would depend on the subjects' ability for fast neural activation and that it would predict bilateral jumping performance. Nine males (21.8 +/- 0.9 yr, means +/- SD) performed unilateral fast isometric knee extensions (120 degrees knee angle) without countermovement on a dynamometer and bilateral squat jumps (SJ) and countermovement jumps (CMJ) starting from 90 and 120 degrees knee angles (full extension = 180 degrees ). The dynamometer contractions started either from full relaxation or from an isometric pre-tension (15% maximal isometric torque, Tmax). Torque time integral for the first 40 ms after torque onset (TTI-40, normalized to Tmax) and averaged normalized rectified knee extensor EMG for 40 ms before fast torque onset (EMG-40) were used to quantify initial torque rise and voluntary muscle activation. TTI-40 without pre-tension (range: 0.02-0.19% Tmax per second) was significantly lower than TTI-40 with pre-tension, and both were significantly (r = 0.81 and 0.80) related to EMG-40. During jumping, similar significant positive relations were found between jump height and knee extensor EMG during the first 100 ms of the rise in ground reaction force. There also were significant positive linear relations between dynamometer TTI-40 and jump height (r = 0.75 (SJ 90), 0.84 (SJ 120), 0.76 (CMJ 90), and 0.86 (CMJ 120)) but not between dynamometer Tmax and jump height (-0.16 < r < 0.02). One-legged TTI-40 to a large extent explained the variation in jump height. The ability to produce a high efferent neural drive before muscle contraction seemed to dominate performance in both the simple single-joint isometric task and the complex multijoint dynamic task.

  1. Construction and Expression of Bivalent Membrane-anchored DNA Vaccine Encoding Sj14FABP and Sj26GST Genes

    Institute of Scientific and Technical Information of China (English)

    GUO Ping; DAI Wuxing; LIU Shuojie; YANG Ping; CHENG Jizhong; LIANG Liang; CHEN Zhihao; GAO Hong

    2006-01-01

    In order to construct a eukaryotic co-expression plasmid containing membrane-anchored Sjcl4FABP and Sjc26GST genes and identify their expression in vitro, Sj14 and Sj26 genes were obtained by RT-PCR with total RNA of Schistosoma japonicum adult worms as the template and cloned into eukaryotic expression plasmid pVAC to construct recombinant plasmids pVAC-Sj14 and pVAC-Sj26. Then a 23 amino-acid signal peptide of human interleukin-2 (IL-2) upstream Sj14 or Sj26 gene and a membrane-anchored sequence containing 32 amino-acids of carboxyl-terminal of human placental alkaline phosphatase (PLAP) downstream were amplified by PCR as the template of plasmid pVAC-Sjl4 or pVAC-Sj26 only to get two gene fragments including Sjl4 gene and Sj26 gene. The two modified genes were altogether cloned into a eukaryotic co-expression plasmid pIRES,resulting in another new recombinant plasmid pIRES-Sj26-Sj 14. The expression of Sj14 and Sj26genes was detected by RT-PCR and indirect immunofluorescent assays (IFA) when the plasmid pIRES-Sj26-Sj 14 was transfected into eukaryotic Hela cells. Restriction enzyme analysis, PCR and sequencing results revealed that the recombinant plasmids pVAC-Sj14, pVAC-Sj26 and pIRES-Sj26-Sj14 were successfully constructed and the expression of modified Sj 14 and Sj26 genes could be detected by RT-PCR and IFA. A bivalent membrane-anchored DNA vaccine encoding Sj14 and Sj26 genes was acquired and expressed proteins were proved to be mostly anchored in cellular membranes.

  2. Mesangial nephropathy in Sjögren's syndrome.

    Science.gov (United States)

    Gamrón, S; Barberis, G; Onetti, C M; Strusberg, I; Hliba, E; Martellotto, G; Jara, H G; Sesin, A M

    2000-01-01

    We describe a 36-year-old woman with Primary Sjögren's Syndrome (PSS). Purpura, corneal perforation, metabolic acidosis, decreased glomerular filtration, hypokalemia, hyposthenuria, and polyuria were present. Chronic renal insufficiency and renal tubular acidosis type I were diagnosed. Kidney biopsy revealed mesangial glomerulonephritis, interstitial nephritis, and tubular atrophy. Replacement treatment with saliva, tears, and potassium citrate was started. She was given prednisone and cyclophosphamide. This would be the first description of PSS, mesangial glomerulonephritis, and chronic renal insufficiency.

  3. USEFULNESS AND METABOLIC IMPLICATIONS OF A 60-SECOND REPEATED JUMPS TEST AS A PREDICTOR OF ACROBATIC JUMPING PERFORMANCE IN GYMNASTS

    Directory of Open Access Journals (Sweden)

    Ferran Antoni Rodriguez

    2013-01-01

    Full Text Available Gymnastics floor exercises are composed of a set of four to five successive acrobatic jumps usually called a �series�. The aims of the study were: 1 to relate the acrobatic gymnastics performance of these series with a repeated jumps test of similar duration (R60, 2 to study the relation between R60 and physiological parameters (heart rate and blood lactate, and the performance obtained in different kinds of jumps, 3 to confirm whether R60, executed without a damped jumping technique, can be considered an anaerobic lactic power test. Twenty male and twenty-four female gymnasts performed three repeated jumps tests for 5 s (R5, 10 s (R10 and 60 s (R60 and vertical jumps, such as drop jumps (DJ, squat jumps (SJ and countermovement jumps (CMJ. We assessed heart rate (HR and blood lactate during R10 and R60. The average values of the maximal blood lactate concentration (Lmax after R10 (males = 2.5±0.6 mmol.l-1; females = 2.1±0.8 mmol.l-1 confirm that anaerobic glycolysis is not activated to a high level. In R60, the Lmax (males = 7.5±1.7 mmol.l-1; females = 5.9±2.1 mmol.l-1 that was recorded does not validate R60 as an anaerobic lactic power test. We confirmed the relation between the average power obtained in R60 (R60Wm and the acrobatic performance on the floor. The inclusion in the multiple regression equation of the best power in DJ and the best flight-contact ratio (FC in R5 confirms the influence of other non-metabolic components on the variability in R60 performance, at least in gymnasts.

  4. [Sjögren's Syndrome].

    Science.gov (United States)

    Corominas, Hèctor; Fíguls, Ramon; Riera, Manel

    2008-03-01

    Sjögren's syndrome is a systemic autoimmune disease that is characterized by the presence of keratoconjunctivitis sicca, xerostomy and a large spectrum of signs and symptoms that translate into a very heterogeneous disease. The mild form that affects mucosal tissues is the most frequent, but there are more severe and active patterns, manifested by the presence of extraglandular affection with a worse prognosis. The clinical spectrum includes anything from mucosal alterations, Raynaud's phenomenon, parotid enlargement or arthritis, but can be aggravated by the presence of neurological, lung or renal affection. Initial therapy includes topical treatment with artificial tears, nocturnal cream and drugs that stimulate secretion for important glandular affection, while severe systemic affection merits immunosuppressant therapy. There has been recent evidence that biologic therapy is useful for the treatment of severe and resistant cases.

  5. Steerable Miniature Jumping Robot

    OpenAIRE

    Kovac, Mirko; Schlegel, Manuel; Zufferey, Jean-Christophe; Floreano, Dario

    2010-01-01

    Jumping is used in nature by many small animals to locomote in cluttered environments or in rough terrain. It offers small systems the benefit of overcoming relatively large obstacles at a low energetic cost. In order to be able to perform repetitive jumps in a given direction, it is important to be able to upright after landing, steer and jump again. In this article, we review and evaluate the uprighting and steering principles of existing jumping robots and present a novel spherical robot w...

  6. Novel Robust Exponential Stability of Markovian Jumping Impulsive Delayed Neural Networks of Neutral-Type with Stochastic Perturbation

    Directory of Open Access Journals (Sweden)

    Yang Fang

    2016-01-01

    Full Text Available The robust exponential stability problem for a class of uncertain impulsive stochastic neural networks of neutral-type with Markovian parameters and mixed time-varying delays is investigated. By constructing a proper exponential-type Lyapunov-Krasovskii functional and employing Jensen integral inequality, free-weight matrix method, some novel delay-dependent stability criteria that ensure the robust exponential stability in mean square of the trivial solution of the considered networks are established in the form of linear matrix inequalities (LMIs. The proposed results do not require the derivatives of discrete and distributed time-varying delays to be 0 or smaller than 1. Moreover, the main contribution of the proposed approach compared with related methods lies in the use of three types of impulses. Finally, two numerical examples are worked out to verify the effectiveness and less conservativeness of our theoretical results over existing literature.

  7. Optimal Ski Jump

    Science.gov (United States)

    Rebilas, Krzysztof

    2013-01-01

    Consider a skier who goes down a takeoff ramp, attains a speed "V", and jumps, attempting to land as far as possible down the hill below (Fig. 1). At the moment of takeoff the angle between the skier's velocity and the horizontal is [alpha]. What is the optimal angle [alpha] that makes the jump the longest possible for the fixed magnitude of the…

  8. Jumping Good Fun

    Science.gov (United States)

    Nye, Susan B.

    2010-01-01

    Jumping rope is an activity that can be fun and enjoyable for all students. It requires minimal activity space, can be performed individually or in small groups, and is an inexpensive way to engage students in a lifelong physical activity. Jumping rope is commonly used by coaches and athletes for training purposes to improve aerobic endurance,…

  9. Jumping Good Fun

    Science.gov (United States)

    Nye, Susan B.

    2010-01-01

    Jumping rope is an activity that can be fun and enjoyable for all students. It requires minimal activity space, can be performed individually or in small groups, and is an inexpensive way to engage students in a lifelong physical activity. Jumping rope is commonly used by coaches and athletes for training purposes to improve aerobic endurance,…

  10. Estimation of Jump Tails

    DEFF Research Database (Denmark)

    Bollerslev, Tim; Todorov, Victor

    We propose a new and flexible non-parametric framework for estimating the jump tails of Itô semimartingale processes. The approach is based on a relatively simple-to-implement set of estimating equations associated with the compensator for the jump measure, or its "intensity", that only utilizes ...

  11. Karl Gustaf Torsten Sjögren and the Sjögren-Larsson syndrome

    Directory of Open Access Journals (Sweden)

    Khalid Al Aboud

    2011-09-01

    Full Text Available Karl Gustaf Torsten Sjögren (1896-1974 a Swedish psychiatrist and geneticist, was a pioneer of modern Swedish psychiatry. Sjögren studied medicine at the University of Uppsala. From 1932 to 1935, he was Head Physician and Director of Lillehagen Hospital in Gothenburg, and between 1935- 1945, he was physician-in-chief at the psychiatric department of Sahlgrenska Hospital in Gothenburg. Sjögren was professor of psychiatry at Karolinska Institutet from 1945 to 1961 and was elected to the Royal Swedish Academy of Sciences in 1951. Sjögren was an expert of psychiatry for the World Health Organization. Among his many contributions to medicine, he is credited for describing several medical conditions, which were later named after him, including Graefe- Sjögren syndrome, Marinesco-Sjögren syndrome, and Sjögren-Larsson syndrome (SLS. During his work on juvenile amaurotic idiocy, Sjögren forged a collaboration with Tage K.L. Larsson, a statistics lecturer at the University of Lund. Their study on the combination of oligophrenia, congenital ichthyosis, and spastic disorders in 1957 established the clinical and genetic profile of a new disease entity, later known as Sjogren-Larsson syndrome (SLS.

  12. Biomechanical Analysis of the Jump Shot in Basketball

    Directory of Open Access Journals (Sweden)

    Struzik Artur

    2014-10-01

    Full Text Available Basketball players usually score points during the game using the jump shot. For this reason, the jump shot is considered to be the most important element of technique in basketball and requires a high level of performance. The aim of this study was to compare the biomechanical characteristics of the lower limbs during a jump shot without the ball and a countermovement jump without an arm swing. The differences between variables provide information about the potential that an athlete can utilise during a game when performing a jump shot. The study was conducted among 20 second-league basketball players by means of a Kistler force plate and the BTS SMART system for motion analysis. The variables measured included the take-off time, mean power, peak power, relative mean power, jump height, maximum landing force and calculated impact ratio. Surprisingly, more advantageous variables were found for the jump shot. This finding suggests a very high performance level in the jump shot in the studied group and a maximum utilisation of their motor abilities. Both types of jumps were characterised by high mean and peak power values and average heights. The high forces at landing, which result in considerable impact ratios, may have prompted the studied group to land softly. Use of the countermovement jump without an arm swing is recommended to assess and predict the progression of player’s jumping ability

  13. Primary Sjögren's syndrome as a systemic disease

    DEFF Research Database (Denmark)

    Malladi, Arundathi S; Sack, Kenneth E; Shiboski, Stephen C;

    2012-01-01

    To study the prevalence of extraglandular manifestations in primary Sjögren's syndrome (SS) among participants enrolled in the Sjögren's International Collaborative Clinical Alliance (SICCA) Registry....

  14. Current Concepts: Mouse Models of Sjögren's Syndrome

    Directory of Open Access Journals (Sweden)

    Tegan N. Lavoie

    2011-01-01

    Full Text Available Sjögren's syndrome (SjS is a complex chronic autoimmune disease of unknown etiology which primarily targets the exocrine glands, resulting in eventual loss of secretory function. The disease can present as either primary SjS or secondary SjS, the latter of which occurs concomitantly with another autoimmune disease such as rheumatoid arthritis, systemic lupus erythematosus, scleroderma, or primary biliary cirrhosis. Current advancements in therapeutic prevention and treatment for SjS are impeded by lack of understanding in the pathophysiological and clinical progression of the disease. Development of appropriate mouse models for both primary and secondary SjS is needed in order to advance knowledge of this disease. This paper details important features, advantages, and pitfalls of current animal models of SjS, including spontaneous, transgenic, knockout, immunization, and transplantation chimera mouse models, and emphasizes the need for a better model in representing the human SjS phenotype.

  15. Quantum Walk with Jumps

    CERN Document Server

    Lavička, H; Kiss, T; Lutz, E; Jex, I

    2011-01-01

    We analyze a special class of 1-D quantum walks (QWs) realized using optical multi-ports. We assume non-perfect multi-ports showing errors in the connectivity, i.e. with a small probability the multi- ports can connect not to their nearest neighbor but to another multi-port at a fixed distance - we call this a jump. We study two cases of QW with jumps where multiple displacements can emerge at one timestep. The first case assumes time-correlated jumps (static disorder). In the second case, we choose the positions of jumps randomly in time (dynamic disorder). The probability distributions of position of the QW walker in both instances differ significantly: dynamic disorder leads to a Gaussian-like distribution, while for static disorder we find two distinct behaviors depending on the parity of jump size. In the case of even-sized jumps, the distribution exhibits a three-peak profile around the position of the initial excitation, whereas the probability distribution in the odd case follows a Laplace-like discre...

  16. Jumping on water

    Science.gov (United States)

    Kim, Ho-Young

    2016-11-01

    Water striders can jump on water as high as they can jump on land. Quick jumps allow them to avoid sudden dangers such as predators' attacks, and therefore understanding how they make such a dramatic motion for survival can shed light on the ultimate level of semi-aquatic motility achievable through evolution. However, the mechanism of their vertical jumping from a water surface has eluded hydrodynamic explanations so far. By observing movements of water strider legs and theoretically analyzing their dynamic interactions with deforming liquid-air interface, we have recently found that different species of jumping striders always tune their leg rotation speed with a force just below that required to break the water surface to reach the maximum take-off velocity. Here, we start with discussing the fundamental theories of dynamics of floating and sinking of small objects. The theories then enable us to analyze forces acting on a water strider while it presses down the water surface to fully exploit the capillary force. We further introduce a 68-milligram at-scale robotic insect capable of jumping on water without splash, strikingly similar to the real strider, by utilizing the water surface just as a trampoline.

  17. Karl Gustaf Torsten Sjögren and Sjögren-Larsson syndrome

    OpenAIRE

    2011-01-01

    Karl Gustaf Torsten Sjögren (1896-1974) a Swedish psychiatrist and geneticist, was a pioneer of modern Swedish psychiatry. Sjögren studied medicine at the University of Uppsala. From 1932 to 1935, he was Head Physician and Director of Lillehagen Hospital in Gothenburg, and between 1935- 1945, he was physician-in-chief at the psychiatric department of Sahlgrenska Hospital in Gothenburg. Sjögren was professor of psychiatry at Karolinska Institutet from 1945 to 1961 and was elected to the Royal...

  18. Approximation of Jump Diffusions in Finance and Economics

    OpenAIRE

    Nicola Bruti-Liberati; Eckhard Platen

    2006-01-01

    In finance and economics the key dynamics are often specified via stochastic differential equations (SDEs) of jump-diffusion type. The class of jump-diffusion SDEs that admits explicit solutions is rather limited. Consequently, discrete time approximations are required. In this paper we give a survey of strong and weak numerical schemes for SDEs with jumps. Strong schemes provide pathwise approximations and therefore can be employed in scenario analysis, filtering or hedge simulation. Weak sc...

  19. Effects of a Low-Load Gluteal Warm-Up on Explosive Jump Performance

    Directory of Open Access Journals (Sweden)

    Comyns Thomas

    2015-06-01

    Full Text Available The purpose of this study was to investigate the effects of a low-load gluteal warm-up protocol on countermovement and squat jump performance. Research by Crow et al. (2012 found that a low-load gluteal warm-up could be effective in enhancing peak power output during a countermovement jump. Eleven subjects performed countermovement and squat jumps before and after the gluteal warm-up protocol. Both jumps were examined in separate testing sessions and performed 30 seconds, and 2, 4, 6 & 8 minutes post warm-up. Height jumped and peak ground reaction force were the dependent variables examined in both jumps, with 6 additional variables related to fast force production being examined in the squat jump only. All jumps were performed on a force platform (AMTI OR6-5. Repeated measures analysis of variance found a number of significant differences (p ≤ 0.05 between baseline and post warm-up scores. Height jumped decreased significantly in both jumps at all rest intervals excluding 8 minutes. Improvement was seen in 7 of the 8 recorded SJ variables at the 8 minute interval. Five of these improvements were deemed statistically significant, namely time to peak GRF (43.0%, and time to the maximum rate of force development (65.7% significantly decreased, while starting strength (63.4%, change of force in first 100 ms of contraction (49.1% and speed strength (43.6% significantly increased. The results indicate that a gluteal warm-up can enhance force production in squat jumps performed after 8 minutes recovery. Future research in this area should include additional warm-up intervention groups for comparative reasons.

  20. What Is Sjögren's Syndrome?

    Science.gov (United States)

    ... supposed to fight disease by killing off harmful viruses and bacteria. But with autoimmune diseases, your immune system attacks ... two things: Genes Exposure to something like a virus or bacteria. What Are the Symptoms of Sjögren’s Syndrome? The ...

  1. Transcriptome Analysis of the Interferon-Signature Defining the Autoimmune Process of Sjögren’s Syndrome

    Science.gov (United States)

    Peck, A. B.; Nguyen, C. Q.

    2015-01-01

    Sjögren’s syndrome (SS) of humans and SS-like (SjS-like) diseases in mouse models are characterized by chronic immune attacks against the salivary and lacrimal glands leading to exocrine dysfunction. One characteristic of SS and SjS-like diseases repeatedly observed is a strong upregulated expression of both the type I (α/β) and type II (γ) interferons (IFNs). In addition, recent global transcriptome studies have identified a variety of IFN-stimulated gene (ISG) transcripts differentially expressed in tissues of SS patients and mouse models exhibiting SjS-like disease. Analyses of these transcriptome databases indicate that the sets of differentially expressed genes are highly restricted, suggesting that there is a unique specificity in ISGs activated (or suppressed) during development and onset of disease. As a result, these observations have led to both SS and SjS-like diseases being designated as ‘interferon-signature’ diseases. While SS and SjS-like diseases may be designated as such, very little effort has been made to determine what an interferon-signature might signify relative to autoinflammation and whether it might point directly to an underlying etiopathological mechanism. Here, we review these limited data and provide a model of how the products of these genes interact molecularly and biologically to define critical details of SS pathology. PMID:22703193

  2. Spinning hydraulic jump

    Science.gov (United States)

    Abderrahmane, Hamid; Kasimov, Aslan

    2013-11-01

    We report an experimental observation of a new symmetry breaking of circular hydraulic jump into a self-organized structure that consists of a spinning polygonal jump and logarithmic-spiral waves of fluid elevation downstream. The waves are strikingly similar to spiral density waves in galaxies. The fluid flow exhibits counterparts of salient morphological features of galactic flows, in particular the outflow from the center, jets, circum-nuclear rings, gas inflows toward the galactic center, and vortices. The hydrodynamic instability revealed here may have a counterpart that plays a role in the formation and sustainability of spiral arms in galaxies.

  3. Respuestas agudas al entrenamiento de fuerza con cargas pesadas y al entrenamiento mediante estiramiento sobre el rendimiento en squat jump y countermovement jump. Acute affects of strenght training from heavy loads and static stretching training on squat jump and countermovement jump.

    Directory of Open Access Journals (Sweden)

    Navarro Valdivielso, Fernando José

    2006-07-01

    Full Text Available ResumenEl objetivo de este estudio es examinar los efectos agudos del entrenamiento con cargas pesadas, y del estiramiento estático sobre sujetos no entrenados y determinar si tiene un efecto positivo sobre el rendimiento en SJ y CMJ. 20 sujetos divididos en dos grupos (grupo de fuerza n:10 y grupo de estiramientos n:10. El grupo de fuerza realizó 3 series de 3 repeticiones con la máxima carga que puede soportar en 3RM y 3 min descanso entre serie. En el grupo de estiramientos los sujetos realizaban 3 series de 3 ejercicios de estiramientos correspondientes a flexores de rodilla, extensores de cadera y gemelos manteniendo el estiramiento pasivo durante 15 segundos en cada ejercicio. SJ y CMJ fueron medidos antes y después del ejercicio. La altura de salto se incrementó significativamente en el SJ después de los ejercicios de estiramiento (pAbstractThe purpose of this study were to examine the acute effects of strength training using heavy loads and static stretching for 15 seconds on SJ and CMJ. A population sample of 20 subjects was studied which was divided into two groups (strength training (ST n=10- and static stretching training (SS n=10- ST group performed 3 sets of 3RM load with 3 min rest between all sets. SS group performed 3 stretching exercises, with each exercise held for 15 second repetitions. The stretches included a seated bilateral hamstring stretch; Standing unilateral quadriceps stretch and standing unilateral calf stretch. Vertical jump performance was measured before and after exercise. The height jump in SJ increased significantly after static stretching training (p

  4. EFFECTS OF WHOLE BODY VIBRATION ON STRENGTH AND JUMPING PERFORMANCE IN VOLLEYBALL AND BEACH VOLLEYBALL PLAYERS

    Science.gov (United States)

    Zmijewski, P.; Jimenez-Olmedo, J.M.; Jové-Tossi, M.A.; Martínez-Carbonell, A.; Suárez-Llorca, C.; Andreu-Cabrera, E.

    2014-01-01

    The primary aim of this study was to examine the effects of 6-week strength training with whole body vibration (WBV) on leg strength and jumping performance in volleyball and beach volleyball players. Twenty-three sub-elite male volleyball (VB; n=12) and beach volleyball players (BVB; n=11) aged 21.2±3.0 years were divided into two groups and subjected to 6 weeks of strength training (three one-hour sessions per week): (I) 12 players (6 VB and 6 BVB players) underwent training with WBV (30-40 Hz, 1.7-2.5 mm, 3.0-5.7 g), and (II) 11 players (6 VB and 5 BVB players) underwent traditional strength training. Squat jump (SJ) and countermovement squat jump (CMJ) measurements by the Ergo Tester contact platform and maximum leg press test (1RM) were conducted. Three-factor (2 time x 2 WBV use x 2 discipline) analysis of variance for SJ, CMJ and 1RM revealed a significant time main effect (pvolleyball and beach volleyball players increases leg strength more and leads to greater improvement in jump performance than traditional strength training, but greater improvements can be expected in beach volleyball players than in volleyball players. PMID:25187676

  5. Vertical jump performance of professional male and female volleyball players: effects of playing position and competition level.

    Science.gov (United States)

    Sattler, Tine; Hadžić, Vedran; Dervišević, Edvin; Markovic, Goran

    2015-06-01

    Vertical jump (VJ) performance is an important element for successful volleyball practice. The aims of the study were (a) to explore the overall VJ performance of elite volleyball players of both sexes, (b) to explore the differences in VJ performance among different competition levels and different playing positions, and (c) to evaluate the sex-related differences in the role of the arm swing and 3-step approach with arm swing on the jump height. We assessed the VJ capacity in 253 volleyball players (113 males and 140 females) from Slovenian first and second Volleyball Division. The height of squat jump (SJ), countermovement jump, block jump, and attack jump was tested using an Optojump system. We observed significant differences (p ≤ 0.05) in VJ height between different levels of play that were most pronounced in the SJ. Position-related differences in VJ performance were observed in male players between receivers and setters (p ≤ 0.05), whereas in females, VJ performance across different playing positions seems equal. Finally, we found that male players significantly better use the arm swing during VJ than females (p ≤ 0.05), whereas the use of eccentric part of the jump and approach before the spike to improve VJ performance seem to be equally mastered activity in both sexes. These results could assist coaches in the development of jumping performance in volleyball players. Furthermore, presented normative data for jump heights of elite male and female volleyball players could be useful in selection and profiling of young volleyball players.

  6. Teaching Jump Rope to Children with Visual Impairments

    Science.gov (United States)

    Lieberman, Lauren J.; Schedlin, Haley; Pierce, Tristan

    2009-01-01

    This article presents strategies for jumping rope for children with visual impairments. Giving choices related to the types of rope and the use of mats is important. In addition, using appropriate instructional strategies and modifications will make jumping rope a skill that the children will enjoy and will lead to their involvement in other…

  7. Relationship of Two Vertical Jumping Tests to Sprint and Change of Direction Speed among Male and Female Collegiate Soccer Players

    Directory of Open Access Journals (Sweden)

    Isaiah T. McFarland

    2016-02-01

    Full Text Available In collegiate level soccer acceleration, maximal velocity and agility are essential for successful performance. Power production is believed to provide a foundation for these speed qualities. The purpose of this study was to determine the relationship of change of direction speed, acceleration, and maximal velocity to both the counter movement jump (CMJ and squat jump (SJ in collegiate soccer players. Thirty-six NCAA Division II soccer players (20 males and 16 females were tested for speed over 10 and 30 m, CODS (T-test, pro agility and power (CMJ, SJ. Independent t-tests (p ≤ 0.05 were used to derive gender differences, and Pearson’s correlations (p ≤ 0.05 calculated relationships between the different power and speed tests. Female subjects displayed moderate-to-strong correlations between 30 m, pro agility and T-test with the CMJ (r = −0.502 to −0.751, and SJ (r = −0.502 to −0.681. Moderate correlations between 10 and 30 m with CMJ (r = −0.476 and −0.570 and SJ (r = −0.443 and −0.553, respectively were observed for males. Moderate to strong relationships exist between speed and power attributes in both male and female collegiate soccer players, especially between CMJ and maximal velocity. Improving stretch shortening cycle (SSC utilization may contribute to enhanced sport-specific speed.

  8. Undular Hydraulic Jump

    Directory of Open Access Journals (Sweden)

    Oscar Castro-Orgaz

    2015-04-01

    Full Text Available The transition from subcritical to supercritical flow when the inflow Froude number Fo is close to unity appears in the form of steady state waves called undular hydraulic jump. The characterization of the undular hydraulic jump is complex due to the existence of a non-hydrostatic pressure distribution that invalidates the gradually-varied flow theory, and supercritical shock waves. The objective of this work is to present a mathematical model for the undular hydraulic jump obtained from an approximate integration of the Reynolds equations for turbulent flow assuming that the Reynolds number R is high. Simple analytical solutions are presented to reveal the physics of the theory, and a numerical model is used to integrate the complete equations. The limit of application of the theory is discussed using a wave breaking condition for the inception of a surface roller. The validity of the mathematical predictions is critically assessed using physical data, thereby revealing aspects on which more research is needed

  9. The MARS for squat, countermovement, and standing long jump performance analyses: are measures reproducible?

    Science.gov (United States)

    Hébert-Losier, Kim; Beaven, C Martyn

    2014-07-01

    Jump tests are often used to assess the effect of interventions because their outcomes are reported valid indicators of functional performance. In this study, we examined the reproducibility of performance parameters from 3 common jump tests obtained using the commercially available Kistler Measurement, Analysis and Reporting Software (MARS). On 2 separate days, 32 men performed 3 squat jumps (SJs), 3 countermovement jumps (CMJs), and 3 standing long jumps (LJs) on a Kistler force-plate. On both days, the performance measures from the best jump of each series were extracted using the MARS. Changes in the mean scores, intraclass correlation coefficients (ICCs), and coefficients of variations (CVs) were computed to quantify the between-day reproducibility of each parameter. Moreover, the reproducibility quantifiers specific to the 3 separate jumps were compared using nonparametric tests. Overall, an acceptable between-day reproducibility (mean ± SD, ICC, and CV) of SJ (0.88 ± 0.06 and 7.1 ± 3.8%), CMJ (0.84 ± 0.17 and 5.9 ± 4.1%), and LJ (0.80 ± 0.13 and 8.1 ± 4.1%) measures was found using the MARS, except for parameters directly relating to the rate of force development (i.e., time to maximal force) and change in momentum during countermovement (i.e., negative force impulse) where reproducibility was lower. A greater proportion of the performance measures from the standing LJs had low ICCs and/or high CVs values most likely owing to the complex nature of the LJ test. Practitioners and researchers can use most of the jump test parameters from the MARS with confidence to quantify changes in the functional ability of individuals over time, except for those relating to the rate of force development or change in momentum during countermovement phases of jumps.

  10. Jumping and Landing Techniques in Elite Women’s Volleyball

    Science.gov (United States)

    Tillman, Mark D.; Hass, Chris J.; Brunt, Denis; Bennett, Gregg R.

    2004-01-01

    Volleyball has become one of the most widely played participant sports in the world. Participation requires expertise in many physical skills and performance is often dependent on an individual’s ability to jump and land. The incidence of injury in volleyball is similar to the rates reported for sports that are considered more physical contact sports. Though the most common source of injury in volleyball is the jump landing sequence, little research exists regarding the prevalence of jumping and landing techniques. The purpose of this study was to quantify the number of jumps performed by female volleyball players in competitive matches and to determine the relative frequency of different jump-landing techniques. Videotape recordings of two matches among four volleyball teams were analyzed for this study. Each activity was categorized by jump type (offensive spike or defensive block) and phase (jump or landing). Phase was subcategorized by foot use patterns (right, left, or both). Each of the players averaged nearly 22 jump-landings per game. Foot use patterns occurred in unequal amounts (p < 0.001) with over 50% of defensive landings occurring on one foot. Coaches, physical educators, and recreation providers may utilize the findings of this inquiry to help prevent injuries in volleyball. Key Points The incidence of injury in volleyball is nearly equivalent to injury rates reported for ice hockey and soccer. Most injuries in volleyball occur during the jump landing sequence, but few data exist regarding jump landing techniques for elite female players. Our data indicate that the vast majority of jumps utilize two feet, but approximately half of landings occur with only one foot. Coaches, physical educators, and recreation providers may utilize the findings of this inquiry to prevent possible injuries in athletes, students, or those who participate in volleyball for recreational purposes. PMID:24497818

  11. [Autogenic training in psychophysiological preparation for parachute jumps].

    Science.gov (United States)

    Reshetnikov, M M

    1978-01-01

    The efficiency of specific psychophysiological preparation--autogenic training--to parachute jumps was measured in two groups of cadets (test subjects and controls). Hetero- and autogenic training was carried out according to a scheme specially developed for this type of activity. The study of questionnaires and physiological data demonstrated that the specific psychophysiological preparation by means of autogenic training for a certain type of activity helped to develop active self-control over one's own state and emotions, alleviated tension, arrested adverse neurotic manifestations (sleep disturbances, depression, anxiety), contributed to the feeling of confidence in the successful completion of the jump and promoted positive tuning towards subsequent jumps.

  12. Pain in primary Sjögren's syndrome.

    Science.gov (United States)

    Vitali, Claudio; Del Papa, Nicoletta

    2015-02-01

    Joint and muscle pain are commonly observed in patients with primary Sjögren's syndrome (pSS). Different types of pain can be distinguished, that is, articular pain, neuropathic pain and widespread pain. Articular pain is due to more or less evident synovitis, usually involving peripheral joints such as hand joints, wrists, knees and ankles. Drugs used to treat rheumatoid arthritis, or lupus synovitis, are also employed for articular involvement in pSS. Pure sensory neuropathies and, more often, small fibre neuropathies are responsible for neuropathic pain in pSS. This is usually localised in the legs and arms with a characteristic glove or sock distribution. Widespread pain, often assuming the features of fibromyalgia, has also been reported in patients with pSS. The pathological mechanisms underlying both neuropathic pain and widespread (fibromyalgia) pain in pSS have not been so far completely clarified.

  13. Rare X chromosome abnormalities in systemic lupus erythematosus and Sjögren's syndrome.

    Science.gov (United States)

    Sharma, Rohan; Harris, Valerie M; Cavett, Joshua; Kurien, Biji T; Liu, Ke; Koelsch, Kristi A; Fayaaz, Anum; Chaudhari, Kaustubh S; Radfar, Lida; Lewis, David; Stone, Donald U; Kaufman, C Erick; Li, Shibo; Segal, Barbara; Wallace, Daniel J; Weisman, Michael H; Venuturupalli, Swamy; Kelly, Jennifer A; Pons-Estel, Bernardo; Jonsson, Roland; Lu, Xianglan; Gottenberg, Jacques-Eric; Anaya, Juan-Manuel; Cunninghame-Graham, Deborah S; Huang, Andrew J W; Brennan, Michael T; Hughes, Pamela; Alevizos, Ilias; Miceli-Richard, Corinne; Keystone, Edward C; Bykerk, Vivian P; Hirschfield, Gideon; Xie, Gang; Nordmark, Gunnel; Bucher, Sara Magnusson; Eriksson, Per; Omdal, Roald; Rhodus, Nelson L; Rischmueller, Maureen; Rohrer, Michael; Wahren-Herlenius, Marie; Witte, Torsten; Alarcon-Riquelme, Marta; Mariette, Xavier; Lessard, Christopher J; Harley, John B; Ng, Wan-Fai; Rasmussen, Astrid; Sivils, Kathy L; Scofield, R Hal

    2017-07-10

    Sjögren's syndrome and systemic lupus erythematosus (SLE) are related by clinical and serological manifestations as well as genetic risks. Both diseases are more commonly found in women compared to men at a ratio of about 10 to 1. Common X chromosome aneuploidies, 47,XXY and 47,XXX, are enriched among men and women, respectively, in either disease suggesting a dose effect on the X chromosome. We examined cohorts of Sjögren's syndrome or SLE patients with intensity plots of X chromosome single nucleotide polymorphism (SNP) alleles along with karyotype of selected subjects. Among ∼2500 women with SLE we found three patients with a triple mosaic consisting of 45,X/46,XX/47,XXX. Among ∼2100 women with Sjögren's syndrome, one patient had 45,X/46,XX/47,XXX with a triplication of the distal p arm of the X chromosome in the 47,XXX cells. Neither the triple mosaic nor the partial triplication were found among controls. In another Sjögren's cohort, we found a mother-daughter pair with partial triplication of this same region of the X chromosome. The triple mosaic occurs in approximately 1 in 25,000 to 50,000 live female births, while partial triplications such are even rarer. Very rare X chromosome abnormalities are present among patients with either Sjögren's or SLE, and may inform the location of a gene(s) that mediate an X dose effect as well as critical cell types in which such effect is operative. This article is protected by copyright. All rights reserved. © 2017, American College of Rheumatology.

  14. Ridge jump process in Iceland

    OpenAIRE

    Garcia, Sebastian

    2010-01-01

    Eastward ridge jumps bring the volcanic zones of Iceland back to the centre of the hotspot in response to the absolute westward drift of the Mid-Atlantic Ridge. Mantellic pulses triggers these ridge jumps. One of them is occurring in Southern Iceland, whereas the exact conditions of the last ridge jump in Northern Iceland remain controversial. The diachronous evolution of these two parts of Iceland may be related to the asymmetric plume-ridge interaction when comparing Northern and Southern I...

  15. and the CMJ jump height

    Directory of Open Access Journals (Sweden)

    Struzik Artur

    2016-04-01

    Full Text Available Study aim: The elastic potential energy accumulated in the musculotendinous units during the countermovement phase of a jump adds up to the energy supplied by the contracting muscles used in the take-off phase. Consequently, the total mechanical energy used during the jump may reach higher values. Stiffness represents a quantitative measure of a body’s elastic properties. Therefore, the aim of this study was to establish the relationship between leg stiffness and the countermovement jump height.

  16. Polyautoimmunity in Sjögren Syndrome.

    Science.gov (United States)

    Anaya, Juan-Manuel; Rojas-Villarraga, Adriana; Mantilla, Ruben D; Arcos-Burgos, Mauricio; Sarmiento-Monroy, Juan Camilo

    2016-08-01

    Polyautoimmunity is defined as the presence of more than one well-defined autoimmune disease (AD) in a single patient. Polyautoimmunity is a frequent condition in Sjögren syndrome (SS) and follows a grouping pattern. The most frequent ADs observed in SS are autoimmune thyroid disease, rheumatoid arthritis, and systemic lupus erythematosus. Main factors associated with polyautoimmunity in SS are tobacco smoking and some genetic variants. The study of polyautoimmunity provides important clues for elucidating the common mechanisms of autoimmne diseases (ie, the autoimmune tautology).

  17. Genetics Home Reference: Sjögren-Larsson syndrome

    Science.gov (United States)

    ... Email Facebook Twitter Home Health Conditions Sjögren-Larsson syndrome Sjögren-Larsson syndrome Printable PDF Open All Close All ... FALDH deficiency fatty aldehyde dehydrogenase deficiency ichthyosis oligophrenia syndrome Sjogren-Larsson syndrome SLS Related Information How are genetic ...

  18. Exploring Lightning Jump Characteristics

    Science.gov (United States)

    Chronis, Themis; Carey, Larry D.; Schultz, Christopher J.; Schultz, Elise; Calhoun, Kristin; Goodman, Steven J.

    2014-01-01

    This study is concerned with the characteristics of storms exhibiting an abrupt temporal increase in the total lightning flash rate (i.e., lightning jump, LJ). An automated storm tracking method is used to identify storm "clusters" and total lightning activity from three different lightning detection systems over Oklahoma, northern Alabama and Washington, D.C. On average and for different employed thresholds, the clusters that encompass at least one LJ (LJ1) last longer, relate to higher Maximum Expected Size of Hail, Vertical Integrated Liquid and lightning flash rates (area-normalized) than the clusters that did not exhibit any LJ (LJ0). The respective mean values for LJ1 (LJ0) clusters are 80 min (35 min), 14 mm (8 mm), 25 kg per square meter (18 kg per square meter) and 0.05 flash per min per square kilometer (0.01 flash per min per square kilometer). Furthermore, the LJ1 clusters are also characterized by slower decaying autocorrelation functions, a result that implies a less "random" behavior in the temporal flash rate evolution. In addition, the temporal occurrence of the last LJ provides an estimate of the time remaining to the storm's dissipation. Depending of the LJ strength (i.e., varying thresholds), these values typically range between 20-60 min, with stronger jumps indicating more time until storm decay. This study's results support the hypothesis that the LJ is a proxy for the storm's kinematic and microphysical state rather than a coincidental value.

  19. More Puddle Jumping

    Science.gov (United States)

    Attari, Babak; Weislogel, Mark; Wollman, Andrew; Chen, Yongkang; Snyder, Trevor

    2016-11-01

    Large droplets and puddles jump spontaneously from sufficiently hydrophobic surfaces during routine drop tower tests. The simple low-cost passive mechanism can in turn be used as an experimental device to investigate dynamic droplet phenomena for drops up to 10,000 times larger than their normal terrestrial counterparts. We provide or confirm quick and qualitative design guides for such 'drop shooters' as employed in drop tower tests including relationships to predict droplet ejection durations and velocities as functions of drop volume, surface texture, surface contour, wettability pattern, drop volume, and fluid properties including contact angle. The latter are determined via profile image comparisons with numerical equilibrium interface computations. Water drop volumes of 0.04 to 400 mL at ejection speeds of -0.007 to 0.12 m/s are demonstrated. An example application of the puddle jump method is made to the classic problem of regime mapping for low-gravity phase change heat transfer for large impinging drops. Many other candidate problems might be identified.

  20. Hydraulic jumps in a channel

    DEFF Research Database (Denmark)

    Bonn, D.; Andersen, Anders Peter; Bohr, Tomas

    2009-01-01

    We present a study of hydraulic jumps with flow predominantly in one direction, created either by confining the flow to a narrow channel with parallel walls or by providing an inflow in the form of a narrow sheet. In the channel flow, we find a linear height profile upstream of the jump as expected...

  1. Electrostatic charging of jumping droplets

    Science.gov (United States)

    Miljkovic, Nenad; Preston, Daniel J.; Enright, Ryan; Wang, Evelyn N.

    2013-09-01

    With the broad interest in and development of superhydrophobic surfaces for self-cleaning, condensation heat transfer enhancement and anti-icing applications, more detailed insights on droplet interactions on these surfaces have emerged. Specifically, when two droplets coalesce, they can spontaneously jump away from a superhydrophobic surface due to the release of excess surface energy. Here we show that jumping droplets gain a net positive charge that causes them to repel each other mid-flight. We used electric fields to quantify the charge on the droplets and identified the mechanism for the charge accumulation, which is associated with the formation of the electric double layer at the droplet-surface interface. The observation of droplet charge accumulation provides insight into jumping droplet physics as well as processes involving charged liquid droplets. Furthermore, this work is a starting point for more advanced approaches for enhancing jumping droplet surface performance by using external electric fields to control droplet jumping.

  2. Jump conditions in transonic equilibria

    Energy Technology Data Exchange (ETDEWEB)

    Guazzotto, L.; Betti, R. [Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627 (United States); Jardin, S. C. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540 (United States)

    2013-04-15

    In the present paper, the numerical calculation of transonic equilibria, first introduced with the FLOW code in Guazzotto et al.[Phys. Plasmas 11, 604 (2004)], is critically reviewed. In particular, the necessity and effect of imposing explicit jump conditions at the transonic discontinuity are investigated. It is found that 'standard' (low-{beta}, large aspect ratio) transonic equilibria satisfy the correct jump condition with very good approximation even if the jump condition is not explicitly imposed. On the other hand, it is also found that high-{beta}, low aspect ratio equilibria require the correct jump condition to be explicitly imposed. Various numerical approaches are described to modify FLOW to include the jump condition. It is proved that the new methods converge to the correct solution even in extreme cases of very large {beta}, while they agree with the results obtained with the old implementation of FLOW in lower-{beta} equilibria.

  3. JUMP KINETIC DETERMINANTS OF SPRINT ACCELERATION PERFORMANCE FROM STARTING BLOCKS IN MALE SPRINTERS

    Directory of Open Access Journals (Sweden)

    Peter S. Maulder

    2006-06-01

    Full Text Available The purpose of this research was to identify the jump kinetic determinants of sprint acceleration performance from a block start. Ten male (mean ± SD: age 20 ± 3 years; height 1.82 ± 0.06 m; weight 76.7 ± 7.9 kg; 100 m personal best: 10.87 + 0.36 s {10.37 - 11.42} track sprinters at a national and regional competitive level performed 10 m sprints from a block start. Anthropometric dimensions along with squat jump (SJ, countermovement jump (CMJ, continuous straight legged jump (SLJ, single leg hop for distance, and single leg triple hop for distance measures of power were also tested. Stepwise multiple regression analysis identified CMJ average power (W/kg as a predictor of 10 m sprint performance from a block start (r = 0.79, r2 = 0.63, p<0.01, SEE = 0.04 (s, %SEE = 2.0. Pearson correlation analysis revealed CMJ force and power (r = -0.70 to -0.79; p = 0.011 - 0.035 and SJ power (r = -0.72 to -0.73; p = 0.026 - 0.028 generating capabilities to be strongly related to sprint performance. Further linear regression analysis predicted an increase in CMJ average and peak take-off power of 1 W/kg (3% & 1.5% respectively to both result in a decrease of 0.01 s (0.5% in 10 m sprint performance. Further, an increase in SJ average and peak take-off power of 1 W/kg (3.5% & 1.5% respectively was predicted to result in a 0.01 s (0.5% reduction in 10 m sprint time. The results of this study seem to suggest that the ability to generate power both elastically during a CMJ and concentrically during a SJ to be good indicators of predicting sprint performance over 10 m from a block start

  4. Choice of jumping strategy in two standard jumps, squat and countermovement jump--effect of training background or inherited preference?

    DEFF Research Database (Denmark)

    Ravn, Susanne; Voigt, M; Simonsen, Erik Bruun

    1999-01-01

    Six male subjects, three professional ballet dancers and three elite volleyball players, performed maximal vertical jumps from 1) a static preparatory position (squat jump), 2) starting with a countermovement (countermovement jump) and 3) a specific jump for ballet and for volleyball, respectively....... The jumps were recorded on highspeed film (500 Hz) combined with registration of ground reaction forces, and net joint moments were calculated by inverse dynamics. The purpose was to investigate the choice of strategy in two standard jumps, squat jump and countermovement jump. The volleyball jump...... was performed with a sequential strategy and the ballet jump was performed with a simultaneous strategy. In the two standard jumps, the choice of strategy was individual and not related to training background. This was additionally confirmed in a test of seven ballet dancers and seven volleyball players....

  5. Effects of recovery type after a kickboxing match on blood lactate and performance in anaerobic tests.

    Science.gov (United States)

    Ouergui, Ibrahim; Hammouda, Omar; Chtourou, Hamdi; Gmada, Nabil; Franchini, Emerson

    2014-06-01

    To verify whether active recovery (AR) applied after a kickboxing match resulted in better performance in anaerobic tests when compared to passive recovery (PR). Eighteen kickboxers volunteered to participate on a Kickboxing match preceded and followed by anaerobic tests: squat jump (SJ), the counter movement jump (CMJ) and the upper-body Wingate test. Blood lactate (BL), heart rate (HR) and rate of perceived exertion (RPE) were analyzed before and after rounds. The recovery sessions consisted of 10min at 50% of maximal aerobic speed or PR. BL was measured at 3, 5 and 10 min after the match, while HR, RPE and anaerobic power were assessed after the recovery period. BL, HR and RPE increased significantly (P<0.001) during the match. BL was lower (P<0.001) after AR compared to PR at 5 min and 10 min (e.g. AR: 8.94 ± 0.31 mmol.l(-1), PR: 10.98 ± 0.33 mmol.l(-1)). However, PR resulted in higher (P<0.05) upper-body mean power (4.65 ± 0.5 W.kg(-1)) compared to AR (4.09 ± 0.5 W.kg(-1)), while SJ and CMJ were not affected by the recovery type. The lactate removal was improved with AR when compared with PR, but AR did not improve subsequent performance.

  6. Optimizing the Distribution of Leg Muscles for Vertical Jumping.

    Science.gov (United States)

    Wong, Jeremy D; Bobbert, Maarten F; van Soest, Arthur J; Gribble, Paul L; Kistemaker, Dinant A

    2016-01-01

    A goal of biomechanics and motor control is to understand the design of the human musculoskeletal system. Here we investigated human functional morphology by making predictions about the muscle volume distribution that is optimal for a specific motor task. We examined a well-studied and relatively simple human movement, vertical jumping. We investigated how high a human could jump if muscle volume were optimized for jumping, and determined how the optimal parameters improve performance. We used a four-link inverted pendulum model of human vertical jumping actuated by Hill-type muscles, that well-approximates skilled human performance. We optimized muscle volume by allowing the cross-sectional area and muscle fiber optimum length to be changed for each muscle, while maintaining constant total muscle volume. We observed, perhaps surprisingly, that the reference model, based on human anthropometric data, is relatively good for vertical jumping; it achieves 90% of the jump height predicted by a model with muscles designed specifically for jumping. Alteration of cross-sectional areas-which determine the maximum force deliverable by the muscles-constitutes the majority of improvement to jump height. The optimal distribution results in large vastus, gastrocnemius and hamstrings muscles that deliver more work, while producing a kinematic pattern essentially identical to the reference model. Work output is increased by removing muscle from rectus femoris, which cannot do work on the skeleton given its moment arm at the hip and the joint excursions during push-off. The gluteus composes a disproportionate amount of muscle volume and jump height is improved by moving it to other muscles. This approach represents a way to test hypotheses about optimal human functional morphology. Future studies may extend this approach to address other morphological questions in ethological tasks such as locomotion, and feature other sets of parameters such as properties of the skeletal

  7. Optimizing the Distribution of Leg Muscles for Vertical Jumping.

    Directory of Open Access Journals (Sweden)

    Jeremy D Wong

    Full Text Available A goal of biomechanics and motor control is to understand the design of the human musculoskeletal system. Here we investigated human functional morphology by making predictions about the muscle volume distribution that is optimal for a specific motor task. We examined a well-studied and relatively simple human movement, vertical jumping. We investigated how high a human could jump if muscle volume were optimized for jumping, and determined how the optimal parameters improve performance. We used a four-link inverted pendulum model of human vertical jumping actuated by Hill-type muscles, that well-approximates skilled human performance. We optimized muscle volume by allowing the cross-sectional area and muscle fiber optimum length to be changed for each muscle, while maintaining constant total muscle volume. We observed, perhaps surprisingly, that the reference model, based on human anthropometric data, is relatively good for vertical jumping; it achieves 90% of the jump height predicted by a model with muscles designed specifically for jumping. Alteration of cross-sectional areas-which determine the maximum force deliverable by the muscles-constitutes the majority of improvement to jump height. The optimal distribution results in large vastus, gastrocnemius and hamstrings muscles that deliver more work, while producing a kinematic pattern essentially identical to the reference model. Work output is increased by removing muscle from rectus femoris, which cannot do work on the skeleton given its moment arm at the hip and the joint excursions during push-off. The gluteus composes a disproportionate amount of muscle volume and jump height is improved by moving it to other muscles. This approach represents a way to test hypotheses about optimal human functional morphology. Future studies may extend this approach to address other morphological questions in ethological tasks such as locomotion, and feature other sets of parameters such as properties of

  8. Frequency Jump Detection and Analysis

    Science.gov (United States)

    2008-12-01

    CUMULATIVE SUM JUMP DETECTION The Cumulative Sum ( CUSUM ) is a classic change-point analysis technique that uses the cumulative sum of the...sum and y is the average of the data. The CUSUM slope indicates the value of the data with respect to the overall average. A flat cumulative sum...sudden change in the CUSUM slope indicates a jump in the data. The CUSUM plot for a data set having a single jump will have a V or inverted V shape

  9. Pancreatic function and morphology in Sjögren's syndrome

    DEFF Research Database (Denmark)

    Afzelius, Pia; Fallentin, Eva Marie; Larsen, Steen;

    2010-01-01

    Sjögren's syndrome (SS) is considered to be a universal exocrinopathy most likely based on autoimmune mechanisms. The degree of exocrine involvement in SS with the exception of salivary and lachrymal glands is, however, not yet established....

  10. Realized Jump Risk and Equity Return in China

    OpenAIRE

    Guojin Chen; Xiaoqun Liu; Peilin Hsieh; Xiangqin Zhao

    2014-01-01

    We utilize the realized jump components to explore a new jump (including nonsystematic jump and systematic jump) risk factor model. After estimating daily realized jumps from high-frequency transaction data of the Chinese A-share stocks, we calculate monthly jump size, monthly jump standard deviation, and monthly jump arrival rate and then use those monthly jump factors to explain the return of the following month. Our empirical results show that the jump tail risk can explain the equity retu...

  11. Region Sjællands Økologiprofil

    DEFF Research Database (Denmark)

    Holm, Jesper; Lund Sørensen, Runa Cecilie

    Nærværende rapport bygger på erfaringer foretaget gennem en kortlægning af Region Sjællands økologiske sektor, som blev lavet i forbindelse med Region Sjællands store fødevareprojekt Grønne Regionale Madoplevelser (GRO) under delprojektet Økologisk Oplevelsesinnovation. Formålet med undersøgelsen...

  12. The effects of a maximal power training cycle on the strength, maximum power, vertical jump height and acceleration of high-level 400-meter hurdlers.

    Science.gov (United States)

    Balsalobre-Fernández, Carlos; Tejero-González, Carlos M; Del Campo-Vecino, Juan; Alonso-Curiel, Dionisio

    2013-03-01

    The aim of this study was to determine the effects of a power training cycle on maximum strength, maximum power, vertical jump height and acceleration in seven high-level 400-meter hurdlers subjected to a specific training program twice a week for 10 weeks. Each training session consisted of five sets of eight jump-squats with the load at which each athlete produced his maximum power. The repetition maximum in the half squat position (RM), maximum power in the jump-squat (W), a squat jump (SJ), countermovement jump (CSJ), and a 30-meter sprint from a standing position were measured before and after the training program using an accelerometer, an infra-red platform and photo-cells. The results indicated the following statistically significant improvements: a 7.9% increase in RM (Z=-2.03, p=0.021, δc=0.39), a 2.3% improvement in SJ (Z=-1.69, p=0.045, δc=0.29), a 1.43% decrease in the 30-meter sprint (Z=-1.70, p=0.044, δc=0.12), and, where maximum power was produced, a change in the RM percentage from 56 to 62% (Z=-1.75, p=0.039, δc=0.54). As such, it can be concluded that strength training with a maximum power load is an effective means of increasing strength and acceleration in high-level hurdlers.

  13. Measurement errors when estimating the vertical jump height with flight time using photocell devices: the example of Optojump

    Directory of Open Access Journals (Sweden)

    A Attia

    2016-12-01

    Full Text Available Common methods to estimate vertical jump height (VJH are based on the measurements of flight time (FT or vertical reaction force. This study aimed to assess the measurement errors when estimating the VJH with flight time using photocell devices in comparison with the gold standard jump height measured by a force plate (FP. The second purpose was to determine the intrinsic reliability of the Optojump photoelectric cells in estimating VJH. For this aim, 20 subjects (age: 22.50±1.24 years performed maximal vertical jumps in three modalities in randomized order: the squat jump (SJ, counter-movement jump (CMJ, and CMJ with arm swing (CMJarm. Each trial was simultaneously recorded by the FP and Optojump devices. High intra-class correlation coefficients (ICCs for validity (0.98-0.99 and low limits of agreement (less than 1.4 cm were found; even a systematic difference in jump height was consistently observed between FT and double integration of force methods (-31% to -27%; p 1.2. Intra-session reliability of Optojump was excellent, with ICCs ranging from 0.98 to 0.99, low coefficients of variation (3.98%, and low standard errors of measurement (0.8 cm. It was concluded that there was a high correlation between the two methods to estimate the vertical jump height, but the FT method cannot replace the gold standard, due to the large systematic bias. According to our results, the equations of each of the three jump modalities were presented in order to obtain a better estimation of the jump height.

  14. Rook Jumping Maze Design Considerations

    Science.gov (United States)

    Neller, Todd W.; Fisher, Adrian; Choga, Munyaradzi T.; Lalvani, Samir M.; McCarty, Kyle D.

    We define the Rook Jumping Maze, provide historical perspective, and describe a generation method for such mazes. When applying stochastic local search algorithms to maze design, most creative effort concerns the definition of an objective function that rates maze quality. We define and discuss several maze features to consider in such a function definition. Finally, we share our preferred design choices, make design process observations, and note the applicability of these techniques to variations of the Rook Jumping Maze.

  15. Stomatological approach to Sjögren's syndrome: diagnosis, management and therapeutical timing.

    Science.gov (United States)

    Minozzi, F; Galli, M; Gallottini, L; Minozzi, M; Unfer, V

    2009-01-01

    Sjögren's syndrome is a chronic multisystem autoimmune disease characterized by the exocrine glands inflammation, with subsequent hypofunction. More frequently lachrymal and salivary glands are interested with subsequent xerophthalmia and xerostomia. Sjögren's syndrome can be present in an idiopathic type or in association with other autoimmune diseases as rheumatoid arthritis, systemic lupus erythematosus, schlerodermia, etc. It interests mainly the women (with a ratio F:M=9:1) with an age between 40 and 60 years old. The disease prevalence varies from 0.4% to 4.8%. The glandular lesions determine in the time a volume reduction and a secretum quality alteration. The most frequent oral manifestations are xerostomia, that allows the establishment of caries, gingivitises, periodontal disease and oral candidiasis. The aim of this work was to perform a thorough review of the literature on Sjögren's syndrome, illustrating the most internationally accredited diagnostic criteria, the patient's management and therapeutical approach in the odontostomatological discipline. The Authors conclude that it doesn't exist a resolutive treatment of the disease. The therapy is only palliative, and is turned to the treatment of xerostomia and xerophthalmia, through systemic and aspecific sialogogues drugs. From the odontostomatological point of view, particularly useful results the domiciliary and professional oral hygiene to contrast the xerostomia effect on the oral structures.

  16. The Effect of Depth Jumps and Weight Training on Leg Strength and Vertical Jump.

    Science.gov (United States)

    Clutch, David; And Others

    1983-01-01

    Two experiments examined the results of depth jumping programs to determine: (1) whether certain depth jumping routines, when combined with weight training, are better than others; and (2) the effect of depth jumping on athletes already in training. Results indicated that depth jumping is effective, but no more so than regular jumping routines.…

  17. [Effects of Reactive Jump Training in Handball Players Regarding Jump Height and Power Development in the Triceps Surae Muscle].

    Science.gov (United States)

    Rensing, N; Westermann, A; Möller, D; von Piekartz, H

    2015-12-01

    Studies have shown changes in the technical and physical demands in modern handball. The game has increased considerably in speed, power and dynamics. Jump training has, therefore, become ever more important in the training of the athletes. These developments contribute to the fact that handball is now one of the most injury-prone types of sport, with the lower extremities being most frequently affected. Reactive jump training is not only used in training by now, but also increasingly in injury prevention. The aim of this study was to investigate the effectiveness of reactive jump training with handball players. 21 regional league handball players were randomly divided into an intervention group (n = 12) and a control group (n = 9). The intervention group completed a six-week reactive jump training programme while the control group went through a non-specific training programme. Jump height (squat and counter movement jump), isokinetic and isometric maximum power as well as muscle activity served as measuring parameters. A comparison of the intervention and control groups revealed that the reactive jump training led to significant improvements in jump height. The isometric and isokinetic maximum power measurements and the electromyographic activities of the triceps surae muscle demonstrated an improvement in the values within the intervention group. However, this improvement was not significant compared with the control group. Likewise both jumps correlated with the muscle activity of the soleus muscle as shown by electromyography. A moderate correlation was noticed between the isokinetic maximum power measurement and the electromyographic activity of the soleus and gastrocnemius medialis muscles. Furthermore, the correlations of the isometric and isokinetic maximum power meas-urements resulted in a strong correlation coefficient. This study revealed a significant increase in jump height after reactive jump training. There was no significant difference in

  18. Test-retest reliability of jump execution variables using mechanography: A comparison of jump protocols

    Science.gov (United States)

    Mechanography during the vertical jump test allows for evaluation of force-time variables reflecting jump execution, which may enhance screening for functional deficits that reduce physical performance and determining mechanistic causes underlying performance changes. However, utility of jump mechan...

  19. [Sjögren's syndrome - case report].

    Science.gov (United States)

    Ladino, R Mabel; Gasitulli, O Angelina; Campos, M Ximena

    2015-01-01

    Sjögren's syndrome (SS) is a chronic autoimmune disease that primarily affects the lacrimal and salivary exocrine glands. In children, it is a rare condition. To present the case of an adolescent with non-specific symptoms, but with a clinical suspicion of SS. A male 12-year old patient, with history of arthralgias for 3 years and suspicion of xerophthalmia. Physical examination showed mild conjunctival congestion, dry mouth and hypermobility of the knees. Laboratory work: blood count and ESR were normal, antinuclear antibodies (+) > 60, Ro (+) > 60 U, and rheumatoid factor concentration (+) 160 IU / ml. SS was suspected, and a study was carried out: Schirmer test determined mild dry eye, salivary gland scintigraphy showed parotid and submandibular gland dysfunction, and salivary gland biopsy reported focal lymphocytic acinar and periductal infiltration. SS was confirmed and treated with prednisone 7.5mg/day and hydroxychloroquine 200mg/day, and local treatment, with good response. The diagnostic criteria for SS in adults identified only 39% of pediatric patients, due to the low frequency of sicca symptoms. Still there are no validated diagnostic criteria for children. A good diagnosis will alleviate symptoms, prevent complications and detect associated diseases. Copyright © 2015. Publicado por Elsevier España, S.L.U.

  20. Understanding fetal factors that contribute to preterm birth: Sjögren-Larsson syndrome as a model.

    Science.gov (United States)

    Staps, Pippa; Hogeveen, Marije; Fuijkschot, Joris; van Drongelen, Joris; Willemsen, Michèl A A P

    2017-09-15

    Preterm birth is the world's leading cause of neonatal death. Unfortunately, the pathophysiology of preterm birth remains poorly understood. Sjögren-Larsson syndrome is a rare, neurometabolic disorder caused by a fatty aldehyde dehydrogenase deficiency. A majority of patients with Sjögren-Larsson syndrome is born preterm. Data of all known Dutch patients with Sjögren-Larsson syndrome and all cases reported in literature were analyzed to learn from preterm birth in context of this rare disease. Exact gestational age was known in 33 Dutch patients; 24 (73%) of them were born preterm, with a median gestational age of 36 weeks. The literature search confirmed our findings: 13 (59%) of 22 cases was born preterm. Preterm birth is a hallmark of Sjögren-Larsson syndrome, presumably caused by the abnormal lipid metabolism of the fetus. At least five additional rare genetic disorders (namely Ehlers-Danlos syndrome, ichthyosis prematurity syndrome, congenital analbuminemia, osteogenesis imperfecta type II and restrictive dermopathy) were found in literature that lead to preterm birth of the affected fetus. These disorders are in fact "experiments of nature" and as such they shed new lights on the mechanisms causing preterm birth.

  1. The short-term effect of whole-body vibration training on vertical jump, sprint, and agility performance.

    Science.gov (United States)

    Cochrane, Darryl J; Legg, Stephen J; Hooker, Michael J

    2004-11-01

    Previous studies have suggested that short-term whole-body vibration (WBV) training produces neuromuscular improvement similar to that of power and strength training. However, it is yet to be determined whether short-term WBV exposure produces neurogenic enhancement for power, speed, and agility. The purpose of this study was to investigate the effect short-term WBV training had on vertical jump, sprint, and agility performance in nonelite athletes. Twenty-four sport science students (16 men and 8 women) were randomly assigned to 2 groups: WBV training or control. Each group included 8 men and 4 women. Countermovement jump (CMJ) height, squat jump (SJ) height, sprint speed over 5, 10, and 20 m, and agility (505, up and back) were performed by each participant before and after 9 days of either no training (control) or WBV training. Perceived discomfort of every participant was recorded after daily WBV exposure and nonexposure. There were no significant differences between WBV and control groups for CMJ, SJ, sprints, and agility. Perceived discomfort differed between the first and subsequent days of WBV training (p < 0.05); however, there was no difference between the WBV and control groups. It is concluded that short-term WBV training did not enhance performance in nonelite athletes.

  2. Gravity current jump conditions, revisited

    Science.gov (United States)

    Ungarish, Marius; Hogg, Andrew J.

    2016-11-01

    Consider the flow of a high-Reynolds-number gravity current of density ρc in an ambient fluid of density ρa in a horizontal channel z ∈ [ 0 , H ] , with gravity in - z direction. The motion is often modeled by a two-layer formulation which displays jumps (shocks) in the height of the interface, in particular at the leading front of the dense layer. Various theoretical models have been advanced to predict the dimensionless speed of the jump, Fr = U /√{g' h } ; g' , h are reduced gravity and jump height. We revisit this problem and using the Navier-Stokes equations, integrated over a control volume embedding the jump, derive balances of mass and momentum fluxes. We focus on understanding the closures needed to complete this model and we show the vital need to understand the pressure head losses over the jump, which we show can be related to the vorticity fluxes at the boundaries of the control volume. Our formulation leads to two governing equations for three dimensionless quantities. Closure requires one further assumption, depending on which we demonstrate that previous models for gravity current fronts and internal bores can be recovered. This analysis yield new insights into existing results, and also provides constraints for potential new formulae.

  3. Coalescence-induced nanodroplet jumping

    Science.gov (United States)

    Cha, Hyeongyun; Xu, Chenyu; Sotelo, Jesus; Chun, Jae Min; Yokoyama, Yukihiro; Enright, Ryan; Miljkovic, Nenad

    2016-10-01

    Water vapor condensation on superhydrophobic surfaces has received much attention in recent years due to the ability of such surfaces to shed microscale water droplets via coalescence-induced droplet jumping, resulting in heat transfer, anti-icing, and self-cleaning performance enhancement. Here we report the coalescence-induced removal of water nanodroplets (R ≈500 nm ) from superhydrophobic carbon nanotube (CNT) surfaces. The two-droplet coalescence time is measured for varying droplet Ohnesorge numbers, confirming that coalescence prior to jumping is governed by capillary-inertial dynamics. By varying the conformal hydrophobic coating thickness on the CNT surface, the minimum jumping droplet radius is shown to increase with increasing solid fraction and decreasing apparent advancing contact angle, allowing us to explore both hydrodynamic limitations stemming from viscous dissipation and surface adhesion limitations. We find that, even for the smallest nanostructure length scale (≤100 nm) and lowest surface adhesions, nonideal surface interactions and the evolved droplet morphology play defining roles in limiting the minimum size for jumping on real surfaces. The outcomes of this work demonstrate the ability to passively shed nanometric water droplets, which has the potential to further increase the efficiency of systems that can harness jumping droplets for a wide range of energy and water applications.

  4. Paralisia periódica hipocalêmica na síndrome de Sjögren Hypokalemic periodic paralysis in Sjögren's syndrome

    Directory of Open Access Journals (Sweden)

    Carolina de Souza Müller

    2006-08-01

    Full Text Available Na síndrome de Sjögren, o acometimento subclínico dos túbulos renais pode afetar uma parcela significativa de pacientes. A maioria apresenta acidose tubular renal distal (tipo 1, que pode se constituir na primeira manifestação da doença auto-imune e contribuir para sua maior duração e gravidade. A depleção de potássio, resultante da acidose tubular renal distal, pode ser extremamente grave e colocar em risco a vida do paciente se não diagnosticada e tratada. A paralisia periódica hipocalêmica foi observada em quase 40% dos pacientes com síndrome de Sjögren e acidose tubular renal distal. Descrevemos, a seguir, o caso de uma paciente com diagnóstico de síndrome de Sjögren, estabelecido há quatro anos, que apresentou amortecimento e fraqueza em membros inferiores com dificuldade respiratória. Houve agravamento dos sintomas e necessidade de internamento em Unidade de Terapia Intensiva. À admissão, verificou-se potássio sérico de 2 mEq/L. Com o diagnóstico de paralisia hipocalêmica, procedeu-se ao tratamento imediato com reposição parenteral de KCl 19,1% e oxigênio suplementar (máscara. Não houve necessidade de ventilação mecânica. A paciente recebeu alta com potássio sérico corrigido para 3,4 mEq/L.Subclinical renal tubular dysfunction in Sjögren's syndrome can affect a significant number of patients, the majority presenting with distal renal tubular acidosis (type 1. Such findings may be the first symptom of the auto-immune disease, and can contribute for a prolonged disease duration and severity. Potassium depletion resulting from distal renal tubular acidosis can be extremely severe, and can jeopardise patient's life, if its diagnosis and treatment are delayed. Hypocalemic periodic paralysis was observed in almost 40% of patients who suffer from Sjögren's syndrome and distal renal tubular acidosis. The case that follows describes a patient who was diagnosed with Sjögren's syndrome four years ago. Three

  5. How far can Tarzan jump?

    Science.gov (United States)

    Shima, Hiroyuki

    2012-11-01

    The tree-based rope swing is a popular recreational facility, often installed in outdoor areas. Hanging from a rope, users drop from a high platform and then swing at great speed like ‘Tarzan’, finally jumping ahead to land on the ground. The question naturally arises, how far can Tarzan jump using the swing? In this paper, I present an introductory analysis of the mechanics of the Tarzan swing, a large pendulum-like swing with Tarzan himself attached as weight. This enables determination of how much further forward Tarzan can jump using a given swing apparatus. The discussion is based on elementary mechanics and is, therefore, expected to provide rich opportunities for investigations using analytic and numerical methods.

  6. How far can Tarzan jump?

    CERN Document Server

    Shima, Hiroyuki

    2012-01-01

    The tree-based rope swing is a popular recreation facility, often installed in outdoor areas, giving pleasure to thrill-seekers. In the setting, one drops down from a high platform, hanging from a rope, then swings at a great speed like "Tarzan", and finally jumps ahead to land on the ground. The question now arises: How far can Tarzan jump by the swing? In this article, I present an introductory analysis of the Tarzan swing mechanics, a big pendulum-like swing with Tarzan himself attached as weight. The analysis enables determination of how farther forward Tarzan can jump using a given swing apparatus. The discussion is based on elementary mechanics and, therefore, expected to provide rich opportunities for investigations using analytic and numerical methods.

  7. Performance changes and relationship between vertical jump measures and actual sprint performance in elite sprinters with visual impairment throughout a Parapan American games training season.

    Science.gov (United States)

    Loturco, Irineu; Winckler, Ciro; Kobal, Ronaldo; Cal Abad, Cesar C; Kitamura, Katia; Veríssimo, Amaury W; Pereira, Lucas A; Nakamura, Fábio Y

    2015-01-01

    The aims of this study were to estimate the magnitude of variability and progression in actual competitive and field vertical jump test performances in elite Paralympic sprinters with visual impairment in the year leading up to the 2015 Parapan American Games, and to investigate the relationships between loaded and unloaded vertical jumping test results and actual competitive sprinting performance. Fifteen Brazilian Paralympic sprinters with visual impairment attended seven official competitions (four national, two international and the Parapan American Games 2015) between April 2014 and August 2015, in the 100- and 200-m dash. In addition, they were tested in five different periods using loaded (mean propulsive power [MPP] in jump squat [JS] exercise) and unloaded (squat jump [SJ] height) vertical jumps within the 3 weeks immediately prior to the main competitions. The smallest important effect on performances was calculated as half of the within-athlete race-to-race (or test-to-test) variability and a multiple regression analysis was performed to predict the 100- and 200-m dash performances using the vertical jump test results. Competitive performance was enhanced during the Parapan American Games in comparison to the previous competition averages, overcoming the smallest worthwhile enhancement in both the 100- (0.9%) and 200-m dash (1.43%). In addition, The SJ and JS explained 66% of the performance variance in the competitive results. This study showed that vertical jump tests, in loaded and unloaded conditions, could be good predictors of the athletes' sprinting performance, and that during the Parapan American Games the Brazilian team reached its peak competitive performance.

  8. Performance changes and relationship between vertical jump measures and actual sprint performance in elite sprinters with visual impairment throughout a Parapan American games training season

    Directory of Open Access Journals (Sweden)

    Irineu eLoturco

    2015-11-01

    Full Text Available The aims of this study were to estimate the magnitude of variability and progression in actual competitive and field vertical jump test performances in elite Paralympic sprinters with visual impairment in the year leading up to the 2015 Parapan American Games, and to investigate the relationships between loaded and unloaded vertical jumping test results and actual competitive sprinting performance. Fifteen Brazilian Paralympic sprinters with visual impairment attended seven official competitions (four national, two international and the Parapan American Games 2015 between April 2014 and August 2015, in the 100- and 200-m dash. In addition, they were tested in five different periods using loaded (mean propulsive power [MPP] in jump squat [JS] exercise and unloaded (squat jump [SJ] height vertical jumps within the 3 weeks immediately prior to the main competitions. The smallest important effect on performances was calculated as half of the within-athlete race-to-race (or test-to-test variability and a multiple regression analysis was performed to predict the 100- and 200-m dash performances using the vertical jump test results. Competitive performance was enhanced during the Parapan American Games in comparison to the previous competition averages, overcoming the smallest worthwhile enhancement in both the 100- (0.9% and 200-m dash (1.43%. In addition, The SJ and JS explained 66% of the performance variance in the competitive results. This study showed that vertical jump tests, in loaded and unloaded conditions, could be good predictors of the athletes’ sprinting performance, and that during the Parapan American Games the Brazilian team reached its peak competitive performance.

  9. Síndrome seco - Síndrome de Sjögren

    OpenAIRE

    Cañas Dávila, Carlos Alberto

    2002-01-01

    ¿Qué es el "síndrome seco"?/ ¿Qué es el síndrome Sjögren?/ ¿Qué es un síndrome de Sjögren primario y qué es un síndrome de Sjögren secundario?/ ¿Cuáles son las causas del síndrome de Sjögren?/ ¿Qué otras manifestaciones distintas a los síntomas secos puede ocasionar el síndrome de Sjögren?/ ¿Cómo se diagnostica un síndrome de Sjögren?/ ¿Cuál es el tratamiento del síndrome de Sjögren?/ ¿Qué tan frecuente es el síndrome de Sjögren?

  10. Primary Sjögren's syndrome (pSS): Subjective symptoms and salivary findings

    DEFF Research Database (Denmark)

    Pedersen, A.M.; Reibel, J.; Nauntofte, Birgitte

    1999-01-01

    autoantibodies, Sjögren's syndrome, saliva flow, labial salivary gland biopsy, rating scales biopsy, rating scales......autoantibodies, Sjögren's syndrome, saliva flow, labial salivary gland biopsy, rating scales biopsy, rating scales...

  11. Alzheimer's Deaths Jump 55 Percent: CDC

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_165941.html Alzheimer's Deaths Jump 55 Percent: CDC More patients also ... News) -- As more baby boomers age, deaths from Alzheimer's disease have jumped 55 percent, and in a ...

  12. Inherent enumerability of strong jump-traceability

    CERN Document Server

    Diamondstone, David; Turetsky, Daniel

    2011-01-01

    We show that every strongly jump-traceable set obeys every benign cost function. Moreover, we show that every strongly jump-traceable set is computable from a computably enumerable strongly jump-traceable set. This allows us to generalise properties of c.e.\\ strongly jump-traceable sets to all such sets. For example, the strongly jump-traceable sets induce an ideal in the Turing degrees; the strongly jump-traceable sets are precisely those that are computable from all superlow Martin-L\\"{o}f random sets; the strongly jump-traceable sets are precisely those that are a base for $\\text{Demuth}_{\\text{BLR}}$-randomness; and strong jump-traceability is equivalent to strong superlowness.

  13. Early diagnosis of primary Sjögren's syndrome : EULAR-SS task force clinical recommendations

    NARCIS (Netherlands)

    Brito-Zerón, Pilar; Theander, Elke; Baldini, Chiara; Seror, Raphaèle; Retamozo, Soledad; Quartuccio, Luca; Bootsma, Hendrika; Bowman, Simon J; Dörner, Thomas; Gottenberg, Jacques-Eric; Mariette, Xavier; Bombardieri, Stefano; de Vita, Salvatore; Mandl, Thomas; Ng, Wan-Fai; Kruize, Aike A; Tzioufas, Athanasios; Vitali, Claudio; Buyon, Jill; Izmirly, Peter; Fox, Robert; Ramos-Casals, Manuel; On Behalf Of The Eular Sjögren Syndrome Task Force, [Unknown

    2015-01-01

    Sjögren's syndrome (SjS) is a systemic autoimmune disease that mainly affects the exocrine glands, leading to generalized mucosal dryness. However, primary SjS may initially present with non-sicca (systemic) manifestations. When these features appear before the onset of an overt sicca syndrome, we m

  14. Developing new behavior strategies of robot soccer team SjF TUKE Robotics

    Directory of Open Access Journals (Sweden)

    Mikuláš Hajduk

    2016-09-01

    Full Text Available There are too many types of robotic soccer approaches at present. SjF TUKE Robotics, who won robot soccer world tournament for year 2010 in category MiroSot, is a team with multiagent system approach. They have one main agent (master and five agent players, represented by robots. There is a point of view, in the article, for code programmer how to create new behavior strategies by creating a new code for master. There is a methodology how to prepare and create it following some rules.

  15. Model for polygonal hydraulic jumps

    DEFF Research Database (Denmark)

    Martens, Erik Andreas; Watanabe, Shinya; Bohr, Tomas

    2012-01-01

    ) near the free surface in the jump region. The model consists of mass conservation and radial force balance between hydrostatic pressure and viscous stresses on the roller surface. In addition, we consider the azimuthal force balance, primarily between pressure and viscosity, but also including...

  16. Jumping property of Lyapunov values

    Institute of Scientific and Technical Information of China (English)

    毛锐; 王铎

    1996-01-01

    A sufficient condition for fcth Lyapunov value to be zero for planar polynomial vector fields is given, which extends the result of "jumping property’ of Lyapunov values obtained by Wang Duo to more general cases. A concrete example that the origin cannot be weak focus of order 1, 2, 4, 5, 8 is presented.

  17. A jump forwards with mathematics and physics

    NARCIS (Netherlands)

    A. Heck; P. Uylings

    2011-01-01

    We jump on human body motions such as bouncing on a jumping stick, hopping, and making kangaroo jumps. Students can record the movements with a digital camera and use their video clips to investigate the motions with suitable video analysis and modelling software. We discuss some mathematical models

  18. Strawberry Shortcake and Other Jumping Rope Ideas.

    Science.gov (United States)

    Adams, Polly K.; Taylor, Michaell K.

    Information, guidelines, and activities for jumping rope are given. A short history of jumping rope explains how it evolved from a spring ritual for men to a play activity involving mostly young girls. Physical and cultural reasons are given as to why jumping rope has been more a sport for girls than for boys. Research studies are noted which show…

  19. Strawberry Shortcake and Other Jumping Rope Ideas.

    Science.gov (United States)

    Adams, Polly K.; Taylor, Michaell K.

    Information, guidelines, and activities for jumping rope are given. A short history of jumping rope explains how it evolved from a spring ritual for men to a play activity involving mostly young girls. Physical and cultural reasons are given as to why jumping rope has been more a sport for girls than for boys. Research studies are noted which show…

  20. Mesopause jumps at Antarctic latitudes

    Science.gov (United States)

    Lübken, Franz-Josef; Höffner, Josef; Becker, Erich; Latteck, Ralph; Murphy, Damian

    2016-04-01

    Recent high resolution temperature measurements by resonance lidar at Davis (69°S) occasionally showed a sudden mesopause altitude increase by ˜5 km and an associated mesopause temperature decrease by ˜10 K. We present further observations which are closely related to this 'mesopause jump', namely the increase of mean height of polar mesospheric summer echoes (PMSE) observed by a VHF radar, very strong westward winds in the upper mesosphere measured by an MF radar, and relatively large eastward winds in the stratosphere taken from reanalysis. We compare to similar observations in the Northern Hemisphere, namely at ALOMAR (69°N) where such mesopause jumps have never been observed. We present a detailed explanation of mesopause jumps. They occur only when stratospheric winds are moderately eastward and mesospheric winds are very large (westward). Under these conditions, gravity waves with comparatively large eastward phase Speeds can pass the stratosphere and propagate to the lower thermosphere because their vertical wavelengths in the mesosphere are rather large which implies reduced dynamical stability. When finally breaking in the lower thermosphere, these waves drive an enhanced residual circulation that causes a cold and high-altitude mesopause. The conditions for a mesopause jump occur only in the Southern Hemisphere (SH) and are associated with the late breakdown of the polar vortex. Mesopause jumps are primarily, but not only, observed prior and close to solstice. We also show that during the onset of PMSE in the SH, stratospheric zonal winds are still eastward (up to 30 m/s), and that the onset is not closely related to the Transition of the stratospheric circulation.

  1. SHORT-TERM JUMP ACTIVITY ON BONE METABOLISM IN FEMALE COLLEGE-AGED NON-ATHLETES

    Directory of Open Access Journals (Sweden)

    Kohei Kishimoto

    2012-03-01

    Full Text Available There have been few studies examining the short-term effect of high-impact activities on bone metabolism measured by bone serum marker concentrations. The purpose of this study was to examine the effect of short-term high-impact jump activity on bone turnover in female college-aged non-athletes. Twenty six healthy females were randomly assigned to a control or jump group. The subjects jumped 5 days per week for 2 weeks. The participants completed 10 jumps per session. A general health questionnaire and a bone-specific physical activity assessment instrument (BPAQ were completed. BPAQ scores were calculated based on the past history of exercise. Blood draws were taken in both groups before and after the two-week experimental period. The vertical ground reaction force (VGRF of all jumps and jump height were measured for each subject daily and the osteogenic index (OI was measured. Concentrations of serum osteocalcin (OC, Bone Specific Alkaline Phosphatase (BAP, C-Terminal Telopeptides of Type I Collagen (CTX and plasma Tartrate-Resistant Acid Phosphatase (TRAP5b were assessed pre and post jump protocol to measure bone formation and resoprtion respectively. A significant interaction (time x group was found in TRAP5b, and BAP values (p < 0.05. There was a significant decrease in CTX and BAP values in the jump group (p < 0.05 after the two week jump protocol. No significant interactions or changes were observed in OC values for either the jump or the control group. Two weeks of jump activity consisting of 10 jumps/day for 5 days/week with a weekly osteogenic index of 52.6 significantly decreased markers of bone resorption (TRAP5b and CTX and bone formation (BAP in young female non- athletes.

  2. Application of a tri-axial accelerometer to estimate jump frequency in volleyball.

    Science.gov (United States)

    Jarning, Jon M; Mok, Kam-Ming; Hansen, Bjørge H; Bahr, Roald

    2015-03-01

    Patellar tendinopathy is prevalent among athletes, and most likely associated with a high jumping load. If methods for estimating jump frequency were available, this could potentially assist in understanding and preventing this condition. The objective of this study was to explore the possibility of using peak vertical acceleration (PVA) or peak resultant acceleration (PRA) measured by an accelerometer to estimate jump frequency. Twelve male elite volleyball players (22.5 ± 1.6 yrs) performed a training protocol consisting of seven typical motion patterns, including jumping and non-jumping movements. Accelerometer data from the trial were obtained using a tri-axial accelerometer. In addition, we collected video data from the trial. Jump-float serving and spike jumping could not be distinguished from non-jumping movements using differences in PVA or PRA. Furthermore, there were substantial inter-participant differences in both the PVA and the PRA within and across movement types (p volleyball. A method for acquiring real-time estimates of jump frequency remains to be verified. However, there are several alternative approaches, and further investigations are needed.

  3. The Missing Luminous Blue Variables and the Bistability Jump

    NARCIS (Netherlands)

    N. Smith; J.S. Vink; A. de Koter

    2004-01-01

    We discuss an interesting feature of the distribution of luminous blue variables (LBVs) on the H-R diagram, and we propose a connection with the bistability jump seen in the winds of early-type supergiants. There appears to be a deficiency of quiescent LBVs on the S Doradus instability strip at lumi

  4. EULAR Sjögren's syndrome disease activity index (ESSDAI)

    DEFF Research Database (Denmark)

    Seror, Raphaèle; Bowman, Simon J; Brito-Zeron, Pilar

    2015-01-01

    The EULAR Sjögren's syndrome (SS) disease activity index (ESSDAI) is a systemic disease activity index that was designed to measure disease activity in patients with primary SS. With the growing use of the ESSDAI, some domains appear to be more challenging to rate than others. The ESSDAI is now...

  5. Dental Implants in Patients with Sjögren's Syndrome

    NARCIS (Netherlands)

    Korfage, Anke; Raghoebar, Gerry M; Arends, Suzanne; Meiners, Petra M; Visser, Anita; Kroese, Frans Gm; Bootsma, Hendrika; Vissink, Arjan

    2015-01-01

    BACKGROUND: Limited evidence is available for applying dental implants in Sjögren's syndrome (SS) patients. PURPOSE: This study aims to retrospectively assess clinical outcome of implant therapy in a cohort of well-classified patients with SS. MATERIALS AND METHODS: All SS patients attending the Uni

  6. Sjögren's syndrome associated with systemic lupus erythematosus.

    Science.gov (United States)

    Taşdemir, Mehmet; Hasan, Chiar; Ağbaş, Ayşe; Kasapçopur, Özgür; Canpolat, Nur; Sever, Lale; Çalışkan, Salim

    2016-09-01

    Systemic lupus erythematosus and Sjögren's syndrome are chronic auto- inflammatory disorders which can lead to serious organ damage. Although systemic lupus erythematosus and Sjögren's syndrome were previously considered two forms of the same disease because of presence of clinical coexistence of these two conditions, the view that they are two different conditions with mutual characteristics has become prominent in recent years. In this paper, we reported a 16 year-old girl who was followed up with a diagnosis of Sjögren's syndrome for six years and then was observed to have overlap of systemic lupus erythematosus. In the baseline, she did not have any clinical or serological evidence for systemic lupus erythematosus. After six year, massive proteinuria and serological findings developed and systemic lupus erythematosus nephritis was diagnosed by kidney biopsy. Currently, systemic lupus erythematosus and Sjögren's syndrome cannot be differentiated definetely. We need more valuable diagnostic and classification criteria to differentiate these two important conditions.

  7. Horners syndrom ved hypofyseapopleksi er sjælden

    DEFF Research Database (Denmark)

    Elmgreen, Søren Bruno

    2013-01-01

    Pituitær apopleksi er en sjælden og potentielt livstruende tilstand forårsaget af blødning eller infarcering i hypofysen. Pituitær apopleksi kan være første tegn på hypofysetumorer, og klassiske symptomer er tordenskraldshovedpine, synstab og oftalmoplegi - hertil kommer varierende grader af hypo...

  8. Effects of Explosive Type Strength Training on Selected Physical and Technical Performance Characteristics in Middle Distance Running - a Case Report

    Directory of Open Access Journals (Sweden)

    Maćkała Krzysztof

    2015-03-01

    Full Text Available Introduction. Distance running performance is a simple function of developing high speeds and maintaining this speed as long as possible. Thus a correct running technique becomes an important component of performance. Technique is effective if the competitor can reach a better performance result with the same or lower energy consumption. The purpose of this investigation was to examine a six weeks application explosive type strength training on lower extremities power and maximum speed performance improvement in order to facilitate running technique in sub-elite male middle-distance runner. Material and methods. A sub-elite runner performed twice a week special exercises and running drills. He completed a pre and post-training jumping (SJ, CMJ, standing long jump, standing five jump and speed (20 m from standing and flying start field tests. For kinematical analysis, a video (SIMI Motion System of a 10 m sprint from a 20 m flying start was collected. Results. Improvement occurred in all measurements but strong changes were evident in the 10 m from 20 flying start and in stride frequency from 3.90 to 4.01 Hz, due to decreasing of ground contact time from 160 to 156 ms. No strong evidence in the participant's running technique changes. Conclusion. This proved that six weeks of dynamic type strength program seems to improve neuromuscular characteristics of running speed and explosive power and no changes in running technique.

  9. Síndrome de Sjögren: relato de caso = Sjögren’s syndrome: case report

    Directory of Open Access Journals (Sweden)

    Alencar, Cristiane

    2007-01-01

    Conclusões: A Síndrome de Sjögren compreende anormalidades em diversos setores do organismo, incluindo a saliva, que desempenha importante papel na fisiologia e biologia do ser humano. Portanto, a interdisciplinaridade, com envolvimento do cirurgião dentista, é de extrema importância para o sucesso terapêutico desta doença

  10. Jumps of the eta invariant

    CERN Document Server

    Farber, M S; Farber, Michael S.; Levine, Jerome P.

    1994-01-01

    We study the eta-invariant, defined by Atiyah-Patodi-Singer a real valued invariant of an oriented odd-dimensional Riemannian manifold equipped with a unitary representation of its fundamental group. When the representation varies analytically, the corresponding eta-invariant may have an integral jump, known also as the spectral flow. The main result of the paper establishes a formula for this spectral jump in terms of the signatures of some homological forms, defined naturally by the path of representations. These signatures may also be computed by means of a spectral sequence of Hermitian forms,defined by the deformation data. Our theorem on the spectral jump has a generalization to arbitrary analytic families of self-adjoint elliptic operators. As an application we consider the problem of homotopy invariance of the rho-invariant. We give an intrinsic homotopy theoretic definition of the rho-invariant, up to indeterminacy in the form of a locally constant function on the space of unitary representations. In...

  11. Hydraulic Jump and Energy Dissipation with Sluice Gate

    Directory of Open Access Journals (Sweden)

    Youngkyu Kim

    2015-09-01

    Full Text Available Movable weirs have been developed to address the weaknesses of conventional fixed weirs. However, the structures for riverbed protection downstream of movable weirs are designed using the criteria of fixed weirs in most cases, and these applications cause problems, such as scour and deformation of structures, due to misunderstanding the difference between different types of structures. In this study, a hydraulic experiment was conducted to examine weir type-specific hydraulic phenomena, compare hydraulic jumps and downstream flow characteristics according to different weir types, and analyze hydraulic characteristics, such as changes in water levels, velocities and energy. Additionally, to control the flow generated by a sluice gate, energy dissipators were examined herein for their effectiveness in relation to different installation locations and heights. As a result, it was found that although sluice gates generated hydraulic jumps similar to those of fixed weirs, their downstream supercritical flow increased to eventually elongate the overall hydraulic jumps. In energy dissipator installation, installation heights were found to be sensitive to energy dissipation. The most effective energy dissipator height was 10% of the downstream free surface water depth in this experiment. Based on these findings, it seems desirable to use energy dissipators to reduce energy, as such dissipators were found to be effective in reducing hydraulic jumps and protecting the riverbed under sluice gates.

  12. Peripheral neuropathies in Sjögren's syndrome: a critical update on clinical features and pathogenetic mechanisms.

    Science.gov (United States)

    Pavlakis, P P; Alexopoulos, H; Kosmidis, M L; Mamali, I; Moutsopoulos, H M; Tzioufas, A G; Dalakas, M C

    2012-08-01

    Sjögren's syndrome is a systemic autoimmune disease that, apart from exocrine glands, may affect every organ or system. Involvement of different sections of the peripheral nervous system results in a wide spectrum of neuropathic manifestations. Based on distinct clinical, electrophysiological and histological criteria, the types of neuropathies seen in Sjögren's syndrome include: a) pure sensory which presents with distal symmetric sensory loss due to axonal degeneration of sensory fibers; sensory ataxia due to loss of proprioceptive large fibers (ganglionopathy); or with painful dysethesias (small fiber sensory neuropathy) due to degeneration of cutaneous axons. The latter appears to be the most common neuropathy in Sjögren's syndrome and requires skin biopsy for diagnosis to document loss or reduction of nerve fiber density; b) sensorimotor polyneuropathy affecting sensory and motor axons, often associated with severe systemic or pro-lymhomatous manifestations, such as palpable purpura and cryoglobulinemia, and c) rare types that include autoimmune demyelinating neuropathy, mononeuropathy, mononeuropathy multiplex and autonomic neuropathy. In this review, the frequency, prevalence and diagnostic criteria for each neuropathy subset are discussed and possible pathogenetic mechanisms are outlined.

  13. AirJump: Using Interfaces to Instantly Perform Simultaneous Extractions.

    Science.gov (United States)

    Berry, Scott M; Pezzi, Hannah M; LaVanway, Alex J; Guckenberger, David J; Anderson, Meghan A; Beebe, David J

    2016-06-22

    Analyte isolation is an important process that spans a range of biomedical disciplines, including diagnostics, research, and forensics. While downstream analytical techniques have advanced in terms of both capability and throughput, analyte isolation technology has lagged behind, increasingly becoming the bottleneck in these processes. Thus, there exists a need for simple, fast, and easy to integrate analyte separation protocols to alleviate this bottleneck. Recently, a new class of technologies has emerged that leverages the movement of paramagnetic particle (PMP)-bound analytes through phase barriers to achieve a high efficiency separation in a single or a few steps. Specifically, the passage of a PMP/analyte aggregate through a phase interface (aqueous/air in this case) acts to efficiently "exclude" unbound (contaminant) material from PMP-bound analytes with higher efficiency than traditional washing-based solid-phase extraction (SPE) protocols (i.e., bind, wash several times, elute). Here, we describe for the first time a new type of "exclusion-based" sample preparation, which we term "AirJump". Upon realizing that much of the contaminant carryover stems from interactions with the sample vessel surface (e.g., pipetting residue, wetting), we aim to eliminate the influence of that factor. Thus, AirJump isolates PMP-bound analyte by "jumping" analyte directly out of a free liquid/air interface. Through careful characterization, we have demonstrated the validity of AirJump isolation through comparison to traditional washing-based isolations. Additionally, we have confirmed the suitability of AirJump in three important independent biological isolations, including protein immunoprecipitation, viral RNA isolation, and cell culture gene expression analysis. Taken together, these data sets demonstrate that AirJump performs efficiently, with high analyte yield, high purity, no cross contamination, rapid time-to-isolation, and excellent reproducibility.

  14. Effects of Recovery Type after a Kickboxing Match on Blood Lactate and Performance in Anaerobic Tests

    OpenAIRE

    Ouergui, Ibrahim; Hammouda, Omar; Chtourou, Hamdi; Gmada, Nabil; Franchini, Emerson

    2014-01-01

    Purpose To verify whether active recovery (AR) applied after a kickboxing match resulted in better performance in anaerobic tests when compared to passive recovery (PR). Methods Eighteen kickboxers volunteered to participate on a Kickboxing match preceded and followed by anaerobic tests: squat jump (SJ), the counter movement jump (CMJ) and the upper-body Wingate test. Blood lactate (BL), heart rate (HR) and rate of perceived exertion (RPE) were analyzed before and after rounds. The recovery s...

  15. Water rotational jump driven large amplitude molecular motions of nitrate ions in aqueous potassium nitrate solution

    CERN Document Server

    Banerjee, Puja; Bagchi, Biman

    2016-01-01

    Molecular dynamics simulations of aqueous potassium nitrate solution reveal a highly complex rotational dynamics of nitrate ions where, superimposed on the expected continuous Brownian motion, are large amplitude angular jumps that are coupled to and at least partly driven by similar large amplitude jump motions in water molecules which are associated with change in the hydrogen bonded water molecule. These jumps contribute significantly to rotational and translational motions of these ions. We explore the detailed mechanism of these correlated (or, coupled) jumps and introduce a new time correlation function to decompose the coupled orientational- jump dynamics of solvent and solute in the aqueous electrolytic solution. Time correlation function provides for the unequivocal determination of the time constant involved in orientational dynamics originating from making and breaking of hydrogen bonds. We discover two distinct mechanisms-both are coupled to density fluctuation but are of different types.

  16. Relações entre diferentes parâmetros de força e a performance do squat jump em atletas treinados

    Directory of Open Access Journals (Sweden)

    Mário Cardoso Marques

    2011-12-01

    Full Text Available O squat jump (SJ tem sido extensivamente usado para controlar o treino, contudo, estudos realizados em atletas treinados são escassos. Assim, a principal questão de estudo foi: quais os parâmetros de força que melhor podem explicar a performance do SJ em atletas treinados? Trinta e cinco atletas realizaram 3 SJ com uma barra de 17 kg. A força exercida contra o solo foi medida com uma plataforma sincronizada com um medidor linear de posição. Somente o melhor salto foi analisado. A análise do SJ foi dividida em duas fases: concêntrica 1 que foi definida desde o início do movimento até se alcançar a máxima velocidade positiva; e a concêntrica 2 definida o momento em que acaba a fase concêntrica 1 até se atingir a velocidade de saída. Não foi observada nenhuma relação entre a performance do SJ e o impulso durante a fase concêntrica 1. Todavia, observou-se uma correlação moderada mas significativa (r = .63 entre a altura do SJ e o impulso da fase concêntrica 2. Para além disso, uma associação moderada significativa (r = .56 foi igualmente observada entre o SJ e a força explosiva produzida durante a fase concêntrica 1. O SJ revelou ainda relações significativas com o pico de potência e potência média, mas somente durante a fase concêntrica 1 (r = .57. Em suma, é importante que os valores de força, de potência e de força explosiva sejam mantidos durante a fase inicial do salto, isto é, durante a fase concêntrica 1, promovendo uma maior impulsão vertical.

  17. Δ-matroid and jump system

    Directory of Open Access Journals (Sweden)

    Santosh N. Kabadi

    2005-01-01

    Full Text Available The concept of Δ-matroid is a nontrivial, proper generalization of the concept of matroid and has been further generalized to the concept of jump system. In this paper, we show that jump systems are, in some sense, equivalent to Δ-matroids. Using this equivalence and the Δ-matroid theory, we give simple proofs and extensions of many of the results on jump systems.

  18. Time change, jumping measure and Feller measure

    OpenAIRE

    He, Ping

    2007-01-01

    In this paper, we shall investigate some potential theory for time change of Markov processes. Under weak duality, it is proved that the jumping measure and Feller measure are actually independent of time change, and the jumping measure of a time changed process induced by a PCAF supported on $V$ coincides with the sum of the Feller measure on $V$ and the trace of the original jumping measure on $V$.

  19. The aerodynamics of jumping rope

    Science.gov (United States)

    Aristoff, Jeffrey; Stone, Howard

    2011-03-01

    We present the results of a combined theoretical and experimental investigation of the motion of a rotating string that is held at both ends (i.e. a jump rope). In particular, we determine how the surrounding fluid affects the shape of the string at high Reynolds numbers: the string bends toward the axis of rotation, thereby reducing its total drag. We derive a pair of coupled non-linear differential equations that describe the shape, the numerical solution of which compares well with asymptotic approximations and experiments. Implications for successful skipping will be discussed.

  20. Dynamic jump intensities and risk premiums

    DEFF Research Database (Denmark)

    Christoffersen, Peter; Ornthanalai, Chayawat; Jacobs, Kris

    2012-01-01

    We build a new class of discrete-time models that are relatively easy to estimate using returns and/or options. The distribution of returns is driven by two factors: dynamic volatility and dynamic jump intensity. Each factor has its own risk premium. The models significantly outperform standard...... models without jumps when estimated on S&P500 returns. We find very strong support for time-varying jump intensities. Compared to the risk premium on dynamic volatility, the risk premium on the dynamic jump intensity has a much larger impact on option prices. We confirm these findings using joint...... estimation on returns and large option samples....

  1. Laminar circular hydraulic jumps without separation

    Science.gov (United States)

    Dasgupta, Ratul; Tomar, Gaurav; Govindarajan, Rama

    2009-11-01

    The traditional inviscid criterion for the occurrence of a planar, standing hydraulic jump is to have the Froude number decrease downstream and go through a value of 1 at some location. Here, upstream propagating, small-amplitude, long, non-dispersive gravity waves are trapped, and non-linear steepening is said to result in a near-discontinuous height profile, but it is not clear how. Such a condition on the Froude number is shown in the present axisymmetric Navier-Stokes computations to hold for a circular jump as well. The relevance of non-linear steepening to a circular jump is therefore a question we wish to answer. In circular jumps, moreover, a region of recirculation is usually observed underneath the jump, underlining the importance of viscosity in this process. This led Tani (J. Phys. Soc. Japan, 1949) to hypothesise that boundary-layer separation was the cause of the circular jump. This hypothesis has been debated extensively and the possibility of circular jumps without separation hinted at. In our simulations, we are able to obtain circular hydraulic jumps without any flow separation. This, and the necessity or otherwise of viscosity in jump formation will be discussed.

  2. A Molecular Jump Mechanism of Water Reorientation

    National Research Council Canada - National Science Library

    Damien Laage; James T. Hynes

    2006-01-01

    .... This water reorientation mechanism involves large-amplitude angular jumps, rather than the commonly accepted sequence of small diffusive steps, and therefore calls for reinterpretation of many...

  3. Hammarby Sjöstad in Stockholm a model case?

    DEFF Research Database (Denmark)

    Grønlund, Bo

    2010-01-01

    central government agencies have contributed to put these guidelines in practice. Representatives have also taken part in similar work at CEN in Brussels. In Sweden, the Stockholm Police started to work out guidelines and give advice - with the mixed new urban district Ärvinge near Kista as their primary...... of a process approach. The presentation will discuss the challenges of putting in practice the guidelines of Crime Prevention Through Urban Planning and Building Design in Hammarby Sjöstad, Stockholm....

  4. Kinematics and Kinetics of Squats, Drop Jumps and Imitation Jumps of Ski Jumpers.

    Science.gov (United States)

    Pauli, Carole A; Keller, Melanie; Ammann, Fabian; Hübner, Klaus; Lindorfer, Julia; Taylor, William R; Lorenzetti, Silvio

    2016-03-01

    Squats, drop jumps, and imitation jumps are commonly used training exercises in ski jumping to enhance maximum force, explosive force, and sport-specific skills. The purpose of this study was to evaluate the kinetics and kinematics of training exercises in ski jumping and to find objective parameters in training exercises that most correlate with the competition performance of ski jumpers. To this end, barbell squats, drop jumps, and imitation jumps were measured in a laboratory environment for 10 elite ski jumpers. Force and motion data were captured, and the influence of maximum vertical force, force difference, vertical take-off velocity, knee moments, knee joint power, and a knee valgus/varus index was evaluated and correlated with their season jump performance. The results indicate that, especially for the imitation jumps, a good correlation exists between the vertical take-off velocity and the personal jump performance on the hill (R = 0.718). Importantly, however, the more the athletes tended toward a valgus knee alignment during the measured movements, the worse their performance (R = 0.729 imitation jumps; R = 0.685 squats). Although an evaluation of the athletes' lower limb alignment during competitive jumping on the hill is still required, these preliminary data suggest that performance training should additionally concentrate on improving knee alignment to increase ski jumping performance.

  5. The Effect of Exercise-Induced Muscle Damage After a Bout of Accentuated Eccentric Load Drop Jumps and the Repeated Bout Effect.

    Science.gov (United States)

    Bridgeman, Lee A; Gill, Nicholas D; Dulson, Deborah K; McGuigan, Michael R

    2017-02-01

    Bridgeman, LA, Gill, ND, Dulson, DK, and McGuigan, MR. The effect of exercise induced muscle damage after a bout of accentuated eccentric load drop jumps and the repeated bout effect. J Strength Cond Res 31(2): 386-394, 2017-Although previous studies have investigated exercise-induced muscle damage (EIMD) after a bout of unloaded drop jumps (DJs), none have investigated the effects of accentuated eccentric load (AEL) DJs on EIMD. The purpose of this study was to investigate the effects of 30 and 50 AEL DJs on strength, jump performance, muscle soreness, and blood markers. Eight resistance trained athletes participated in this study. In week 1, baseline countermovement jump (CMJ), squat jump (SJ), concentric and eccentric peak force (PF), creatine kinase, and muscle soreness were assessed. Subjects then completed 30 AEL DJs and baseline measures were retested immediately postintervention, 1, 24, and 48 hours later. Two weeks later, the subjects completed the same protocol with an increase in AEL DJ volume (50). Subjects' SJ height was reduced in week 1 compared with week 3, postintervention, 1, 24, and 48 hours later (ES = -0.34, -0.44, -0.38, and -0.40). Subjects' CMJ height was reduced in week 1 compared with week 3, postintervention, 1, and 24 hours later (ES = -0.37, -0.29, and -0.39). Concentric PF was reduced in week 1 compared with week 3, postintervention and 24 and 48 hours later (ES = -0.02, -0.23, and -0.32). Eccentric PF was reduced in week 1 compared with week 3, postintervention, 24, and 48 hours later (ES = -0.24, -0.16, and -0.50). In this sample, 30 AEL DJs attenuated the effects of EIMD following which 50 AEL DJs completed 2 weeks later.

  6. Comparative Study on the Immunogenicity between Recombinant MS-Sj26GST Vaccine and Recombinant BCG-Sj26GST Vaccine in Schistosoma japonicum

    Institute of Scientific and Technical Information of China (English)

    戴五星; 高红; 黄海浪; 袁野; 胡佳杰; 皇甫永穆

    2003-01-01

    The BALB/c mice were immunized with rMS-Sj26GST and rBCG-Sj26GST vaccine inSchistosoma japonicum by subcutaneous injection. After they were immunized for 8 weeks, the eye-balls were removed to get blood and macrophages of abdominal cavity and spleen cells were harves-ted. The lymphocytic stimulating index (SI) was used to measure the cellular proliferating abilityand NO release was used to measure the phagocytic activity of the macrophages. By using ELISAkit, the levels of interleukin-2 (IL-2) and interferon-γ(IFN-γ) in serum and the splenic lymphocyt-ic cultured supernatant were detected. The results showed that after the mice were immunized with106 CFU of rMS-Sj26GST and rBCG-Sj26GST vaccine separately by subcutaneous injection, prolif-erating ability of splenic lymphocytes in the mice showed no difference (P>0.05), but both weresignificantly increased as compared with that in the control group(P<0.05); The contents of NOin the intraperitoneal macrophages of rMS-Sj26GST vaccine group were significantly lower than inthe control group (P<0. 001) and rBCG-Sj26GST vaccine group (P<0. 01); The levels of serumIL-2 in the rMS-Sj26GST vaccine group were significantly increased as compared with that in thecontrol group (P<0. 001), vector group (P<0.01) and rBCG-Sj26GST vaccine group (P<0.05);The contents of serum IFN-γ in the rMS-Sj26GST vaccine group were significantly increased ascompared with that in the control group (P<0.01) and rBCG-Sj26GST vaccine group (P<0.05).The contents of IFN-γ in the cultured supernatant were significantly lower than those of rBCG-Sj26GST vaccine group (P<0. 001), but were significantly increased as compared with that in thecontrol group (P<0.01). It was indicated that both vaccines could enhance the immune response ofthe mice, but rMS-Sj26GST vaccine had stronger immunogenicity than rBCG-Sj26GST vaccine.

  7. Optimal coordination of maximal-effort horizontal and vertical jump motions – a computer simulation study

    Directory of Open Access Journals (Sweden)

    Komura Taku

    2007-06-01

    Full Text Available Abstract Background The purpose of this study was to investigate the coordination strategy of maximal-effort horizontal jumping in comparison with vertical jumping, using the methodology of computer simulation. Methods A skeletal model that has nine rigid body segments and twenty degrees of freedom was developed. Thirty-two Hill-type lower limb muscles were attached to the model. The excitation-contraction dynamics of the contractile element, the tissues around the joints to limit the joint range of motion, as well as the foot-ground interaction were implemented. Simulations were initiated from an identical standing posture for both motions. Optimal pattern of the activation input signal was searched through numerical optimization. For the horizontal jumping, the goal was to maximize the horizontal distance traveled by the body's center of mass. For the vertical jumping, the goal was to maximize the height reached by the body's center of mass. Results As a result, it was found that the hip joint was utilized more vigorously in the horizontal jumping than in the vertical jumping. The muscles that have a function of joint flexion such as the m. iliopsoas, m. rectus femoris and m. tibialis anterior were activated to a greater level during the countermovement in the horizontal jumping with an effect of moving the body's center of mass in the forward direction. Muscular work was transferred to the mechanical energy of the body's center of mass more effectively in the horizontal jump, which resulted in a greater energy gain of the body's center of mass throughout the motion. Conclusion These differences in the optimal coordination strategy seem to be caused from the requirement that the body's center of mass needs to be located above the feet in a vertical jumping, whereas this requirement is not so strict in a horizontal jumping.

  8. Effects of fatigue of plantarflexors on control and performance in vertical jumping.

    Science.gov (United States)

    Bobbert, Maarten F; van der Krogt, Marjolein M; van Doorn, Hemke; de Ruiter, Cornelis J

    2011-04-01

    We investigated the effects of a mismatch between control and musculoskeletal properties on performance in vertical jumping. Six subjects performed maximum-effort vertical squat jumps before (REF) and after the plantarflexors of the right leg had been fatigued (FAT) while kinematic data, ground reaction forces, and EMG of leg muscles were collected. Inverse dynamics was used to calculate the net work at joints, and EMG was rectified and smoothed to obtain the smoothed rectified EMG (SREMG). The jumps of the subjects were also simulated with a musculoskeletal model comprising seven body segments and 12 Hill-type muscles, and having as only input muscle stimulation. Jump height was approximately 6 cm less in FAT jumps than in REF jumps. In FAT jumps, peak SREMG level was reduced by more than 35% in the right plantarflexors and by approximately 20% in the right hamstrings but not in any other muscles. In FAT jumps, the net joint work was reduced not only at the right ankle (by 70%) but also at the right hip (by 40%). Because the right hip was not spanned by fatigued muscles and the reduction in SREMG of the right hamstrings was relatively small, this indicated that the reduction in performance was partly due to a mismatch between control and musculoskeletal properties. The differences between REF and FAT jumps of the subjects were confirmed and explained by the simulation model. Reoptimization of control for the FAT model caused performance to be partly restored by approximately 2.5 cm. The reduction in performance in FAT jumps was partly due to a mismatch between control and musculoskeletal properties.

  9. [Neuromyelitis optica spectrum disorders as initial presentation of Sjögren's syndrome: A case report].

    Science.gov (United States)

    Alva Díaz, Carlos; Andamayo Villalba, Luis; Mori, Nicanor; Ventura Chilón, Jésica Janet; Romero, Roberto

    2016-02-29

    Neuromyelitis Optica Spectrum Disorder (NMOSD) is a rare systemic autoimmune disease which is sometimes found in association with other autoimmune disorders including Sjogren's syndrome. Neurological manifestations occur in 20% to 25% of diagnosed cases of Sjögren's syndrome; however, less than 5% of patients with Sjögren's syndrome have neurological manifestations as the initial presenting feature of Sjögren's syndrome. We report the case of an elderly female with longitudinal myelitis as a presenting feature who had positive antibody to aquaporin-4 (NMO-IgG) and Sjögren's syndrome.

  10. Constructing the recombinant plasmid-pLXSN-SjYF-of Yolk Ferritin gene of Schistosoma japonicum

    Institute of Scientific and Technical Information of China (English)

    ZhouJunmei; YuXinbing; WuZhongdao; ZhengYinan; LiYan

    1999-01-01

    TO construct the recotabinant plasmid —— pLXSN-SjYF to prepare for expression and DNA vaccine of Schistosoma japonicum gene. Methods :Mnpliffing DNA fragment coding yolk fereltin from a female adult Sehistosoma japonicum DNAs by PCR. The fragment was inseted into pLXSN retrovirus vector by digesting with restrictive enzymes and linking reactions. The positive clone was screened on LB plates contmaining amplcillin asld identified by restrictive enzymes digestion and PCR amplification, Resttlts The specific DNA fragmem SjYF was amplified from the female adult SjDNAs. IaLXSN-SjYF was constructed successfully and the further research will be carried out.

  11. Electroencephalographic recordings during parachute jump sessions.

    Science.gov (United States)

    Gauthier, P; Jouffray, L; Rodi, M; Gottesmann, C

    1980-04-01

    Electroencephalographic (EEG) recordings of experienced parachutists were done by means of telemetry before, during, and after jumps of up to 3500m. During free-fall and after stabilization, alpha rhythm was recorded from several alpha reactive subjects when they closed their eyes. No pathological EEG recordings were obtained during the different phases of the jump.

  12. Jump Detection in the Danish Stock Market

    DEFF Research Database (Denmark)

    Høg, Esben

    2002-01-01

    It is well known in financial economics that stock market return data are often modelled by a diffusion process with some regular drift function. Occasionally, however, sudden changes or jumps occur in the return data. Wavelet scaling methods are used to detect jumps and cusps in stock market...

  13. Rope Jumping: A Preliminary Developmental Study.

    Science.gov (United States)

    Wickstrom, Ralph L.

    The basic movement pattern used in skilled individual rope jumping performance was determined and used as a model against which to evaluate the rope jumping form used by children at various levels of skills development. The techniques of adults and nursery school children were filmed and analyzed. The specific causes of unsuccessful attempts were…

  14. Separation and pattern formation in hydraulic jumps

    DEFF Research Database (Denmark)

    Bohr, Tomas; Ellegaard, C.; Hansen, A. Espe;

    1998-01-01

    We present theory and experiments on the circular hydraulic jump in the stationary regime. The theory can handle the situation in which the fluid flows over an edge far away from the jump. In the experiments the external height is controlled, and a series of transitions in the flow structure appe...

  15. Internal hydraulic jumps with large upstream shear

    Science.gov (United States)

    Ogden, Kelly; Helfrich, Karl

    2015-11-01

    Internal hydraulic jumps in approximately two-layered flows with large upstream shear are investigated using numerical simulations. The simulations allow continuous density and velocity profiles, and a jump is forced to develop by downstream topography, similar to the experiments conducted by Wilkinson and Wood (1971). High shear jumps are found to exhibit significantly more entrainment than low shear jumps. Furthermore, the downstream structure of the flow has an important effect on the jump properties. Jumps with a slow upper (inactive) layer exhibit a velocity minimum downstream of the jump, resulting in a sub-critical downstream state, while flows with the same upstream vertical shear and a larger barotropic velocity remain super-critical downstream of the jump. A two-layer theory is modified to account for the vertical structure of the downstream density and velocity profiles and entrainment is allowed through a modification of the approach of Holland et al. (2002). The resulting theory can be matched reasonably well with the numerical simulations. However, the results are very sensitive to how the downstream vertical profiles of velocity and density are incorporated into the layered model, highlighting the difficulty of the two layer approximation when the shear is large.

  16. Strong jump traceability and Demuth randomness

    CERN Document Server

    Greenberg, Noam

    2011-01-01

    We solve the covering problem for Demuth randomness, showing that a computably enumerable set is computable from a Demuth random set if and only if it is strongly jump-traceable. We show that on the other hand, the class of sets which form a base for Demuth randomness is a proper subclass of the class of strongly jump-traceable sets.

  17. Effects of Strength Training Combined with Specific Plyometric exercises on body composition, vertical jump height and lower limb strength development in elite male handball players: a case study.

    Science.gov (United States)

    Carvalho, Alberto; Mourão, Paulo; Abade, Eduardo

    2014-06-28

    The purpose of the present study was to identify the effects of a strength training program combined with specific plyometric exercises on body composition, vertical jump (VJ) height and strength development of lower limbs in elite male handball players. A 12-week program with combined strength and specific plyometric exercises was carried out for 7 weeks. Twelve elite male handball players (age: 21.6 ± 1.73) competing in the Portuguese Major League participated in the study. Besides the anthropometric measurements, several standardized jump tests were applied to assess VJ performance together with the strength development of the lower limbs in an isokinetic setting. No significant changes were found in body circumferences and diameters. Body fat content and fat mass decreased by 16.4 and 15.7% respectively, while lean body mass increased by 2.1%. Despite small significance, there was in fact an increase in squat jump (SJ), counter movement jump (CMJ) and 40 consecutive jumps after the training period (6.1, 3.8 and 6.8%, respectively). After the applied protocol, peak torque increased in lower limb extension and flexion in the majority of the movements assessed at 90ºs-1. Consequently, it is possible to conclude that combining general strength-training with plyometric exercises can not only increase lower limb strength and improve VJ performance but also reduce body fat content.

  18. Stochastic stability properties of jump linear systems

    Science.gov (United States)

    Feng, Xiangbo; Loparo, Kenneth A.; Ji, Yuandong; Chizeck, Howard J.

    1992-01-01

    Jump linear systems are defined as a family of linear systems with randomly jumping parameters (usually governed by a Markov jump process) and are used to model systems subject to failures or changes in structure. The authors study stochastic stability properties in jump linear systems and the relationship among various moment and sample path stability properties. It is shown that all second moment stability properties are equivalent and are sufficient for almost sure sample path stability, and a testable necessary and sufficient condition for second moment stability is derived. The Lyapunov exponent method for the study of almost sure sample stability is discussed, and a theorem which characterizes the Lyapunov exponents of jump linear systems is presented.

  19. A review on the basketball jump shot.

    Science.gov (United States)

    Okazaki, Victor H A; Rodacki, André L F; Satern, Miriam N

    2015-06-01

    The ability to shoot an effective jump shot in the sport of basketball is critical to a player's success. In an attempt to better understand the aspects related to expert performance, researchers have investigated successful free throws and jump shots of various basketball players and identified movement variables that contribute to their success. The purpose of this study was to complete a systematic review of the scientific literature on the basketball free throw and jump shot for the purpose of revealing the critical components of shooting that coaches, teachers, and players should focus on when teaching, learning, practising, and performing a jump shot. The results of this review are presented in three sections: (a) variables that affect ball trajectory, (b) phases of the jump shot, and

  20. Usefulness of the jump-and-reach test in assessment of vertical jump performance.

    Science.gov (United States)

    Menzel, Hans-Joachim; Chagas, Mauro H; Szmuchrowski, Leszek A; Araujo, Silvia R; Campos, Carlos E; Giannetti, Marcus R

    2010-02-01

    The objective was to estimate the reliability and criterion-related validity of the Jump-and-Reach Test for the assessment of squat, countermovement, and drop jump performance of 32 male Brazilian professional volleyball players. Performance of squat, countermovement, and drop jumps with different dropping heights was assessed on the Jump-and-Reach Test and the measurement of flight time, then compared across different jump trials. The very high reliability coefficients of both assessment methods and the lower correlation coefficients between scores on the assessments indicate a very high consistency of each method but only moderate covariation, which means that they measure partly different items. As a consequence, the Jump-and-Reach Test has good ecological validity in situations when reaching height during the flight phase is critical for performance (e.g., basketball and volleyball) but only limited accuracy for the assessment of vertical impulse production with different jump techniques and conditions.

  1. Jumping from the Brooklyn Bridge.

    Science.gov (United States)

    Kurtz, R J; Pizzi, W F; Richman, H; Tiefenbrun, J

    1987-07-01

    In an attempt to identify factors contributing to survival of free fall and impact, we evaluated the records of four patients who survived a jump from the Brooklyn Bridge into the East River in New York Harbor between 1977 and 1985. All four patients were male and ranged in age from 22 to 67 years. They had free falls of between 41.0 and 48.8 meters. All of the patients were brought to the hospital within 24 minutes of entering the water. Three of the four had emergency surgical treatment and the fourth patient had only minor injuries. All four patients survived the suicide attempts. The length of the hospital stay ranged from two to 26 days.

  2. Physical data collected in the North Atlantic Ocean on the SEWARD JOHNSON cruises SJ9506 and SJ9508 as part of the GB project from 1995-04-24 to 1995-06-15 (NODC Accession 0098780)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Acoustic Doppler Current Profiler Observations Current Vectors, April - June 1995 Ship: R/V Seward Johnson Cruises/Dates: SJ9506/April 26 - May 2, 1995 SJ9508/June 6...

  3. Histopathological changes in exocrine glands of murine transplantation chimeras. II: Sjögren's syndrome-like exocrinopathy in mice without lupus nephritis. A model of primary Sjögren's syndrome

    DEFF Research Database (Denmark)

    Ussing, Anne Phaff; Prause, J.U.; Sørensen, Inger

    1992-01-01

    Autoimmune disease, primary Sjögren's syndrome, transplantation chimeras, experimental model, exocrinopathy, inbred mouse strains......Autoimmune disease, primary Sjögren's syndrome, transplantation chimeras, experimental model, exocrinopathy, inbred mouse strains...

  4. Use of video observation and motor imagery on jumping performance in national rhythmic gymnastics athletes.

    Science.gov (United States)

    Battaglia, Claudia; D'Artibale, Emanuele; Fiorilli, Giovanni; Piazza, Marina; Tsopani, Despina; Giombini, Arrigo; Calcagno, Giuseppe; di Cagno, Alessandra

    2014-12-01

    The aim of this study was to evaluate whether a mental training protocol could improve gymnastic jumping performance. Seventy-two rhythmic gymnasts were randomly divided into an experimental and control group. At baseline, experimental group completed the Movement Imagery Questionnaire Revised (MIQ-R) to assess the gymnast ability to generate movement imagery. A repeated measures design was used to compare two different types of training aimed at improving jumping performance: (a) video observation and PETTLEP mental training associated with physical practice, for the experimental group, and (b) physical practice alone for the control group. Before and after six weeks of training, their jumping performance was measured using the Hopping Test (HT), Drop Jump (DJ), and Counter Movement Jump (CMJ). Results revealed differences between jumping parameters F(1,71)=11.957; p<.01, and between groups F(1,71)=10.620; p<.01. In the experimental group there were significant correlations between imagery ability and the post-training Flight Time of the HT, r(34)=-.295, p<.05 and the DJ, r(34)=-.297, p<.05. The application of the protocol described herein was shown to improve jumping performance, thereby preserving the elite athlete's energy for other tasks. Copyright © 2014 Elsevier B.V. All rights reserved.

  5. Long-Term Behaviors of Stochastic Interest Rate Models with Jumps and Memory

    CERN Document Server

    Bao, Jianhai

    2011-01-01

    In this paper we show the convergence of the long-term return $t^{-\\mu}\\int_0^tX(s)\\d s$ for some $\\mu\\geq1$, where $X$ is the short-term interest rate which follows an extension of Cox-Ingersoll-Ross type model with jumps and memory, and, as an application, we also investigate the corresponding behavior of two-factor Cox-Ingersoll-Ross model with jumps and memory

  6. Towards a neuronal network controller for vertical jumping from different initial squat depths.

    Science.gov (United States)

    Bobbert, Maarten F

    2010-01-01

    In this study, a forward dynamic simulation model of the human musculoskeletal system was used to explore various strategies of generating muscle stimulation patterns for vertical squat jumping. It was shown that a simple mapping from joint angles to muscle stimulation onsets yielded successful control, albeit not optimal control, for jumps from different initial squat depths. Furthermore, it was shown that this mapping could be implemented in a straightforward way in a simple network of Hodgkin-Huxley type neurons.

  7. Primary Sjögren's syndrome with minimal change disease--a case report.

    Science.gov (United States)

    Yang, Mei-Li; Kuo, Mei-Chuan; Ou, Tsan-Teng; Chen, Hung-Chun

    2011-05-01

    Glomerular involvement in patients with primary Sjögren's syndrome (pSS) has rarely been reported. Among them, membranoproliferative glomerulonephritis and membranous nephropathy are the more common types. We report a middle-aged female presenting concurrently with nephrotic syndrome and microscopic hematuria, and her pSS was diagnosed by positive anti-Ro (SSA)/anti-La (SSB) autoantibodies, dry mouth, severely diffuse impaired function of both bilateral parotid and submandibular glands, and a positive Schirmer test. Renal pathology revealed minimal change disease and thin basement membrane nephropathy. The patient's nephrotic syndrome resolved after treatment with corticosteroids. To our knowledge, this is the first report of minimal change disease in a patient with pSS.

  8. Potential Therapy for Rheumatoid Arthritis and Sjögren Syndrome With Human Chorionic Gonadotropin.

    Science.gov (United States)

    Rao, C V

    2016-05-01

    Autoimmune diseases such as rheumatoid arthritis (RA) and Sjögren syndrome (SS) ameliorate during pregnancy, through dampening (immunotolerance) of the maternal immune system which protects the fetus from rejection. A large number of studies have shown that human chorionic gonadotropin (hCG) contributes to this tolerance. Studies on animal models have reaffirmed that hCG treatment mimics the benefits of pregnancy. Based on the scientific evidence, randomized clinical trials comparing hCG with current therapies and/or placebo are recommended for RA, SS, and for other autoimmune diseases such as, type 1 diabetes and ankylosing spondylitis, which also get better during pregnancy and hCG treatment seems to help.

  9. Primary Sjögren’s syndrome with minimal change disease—A case report

    Directory of Open Access Journals (Sweden)

    Mei-Li Yang

    2011-05-01

    Full Text Available Glomerular involvement in patients with primary Sjögren’s syndrome (pSS has rarely been reported. Among them, membranoproliferative glomerulonephritis and membranous nephropathy are the more common types. We report a middle-aged female presenting concurrently with nephrotic syndrome and microscopic hematuria, and her pSS was diagnosed by positive anti-Ro (SSA/anti-La (SSB autoantibodies, dry mouth, severely diffuse impaired function of both bilateral parotid and submandibular glands, and a positive Schirmer test. Renal pathology revealed minimal change disease and thin basement membrane nephropathy. The patient’s nephrotic syndrome resolved after treatment with corticosteroids. To our knowledge, this is the first report of minimal change disease in a patient with pSS.

  10. Atrophic pityriasis versicolor occurring in a patient with Sjögren's syndrome.

    Science.gov (United States)

    Marinello, Elena; Piaserico, Stefano; Alaibac, Mauro

    2017-01-18

    Pityriasis versicolor is one of the most frequent epidermal mycotic infections in the world, but its atrophic variant is rarely described. The aetiology of the atrophy is still unknown, and two main hypotheses have been formulated, one suggesting a correlation with long-term use of topical steroids and the other a delayed type hypersensitivity to epicutaneous antigens derived from components of the fungus. Atrophic pityriasis versicolor is a benign disease, but needs to be distinguished from other more severe skin diseases manifesting with cutaneous atrophy. The diagnosis can be easily confirmed by direct microscopic observation of the scales soaked in 15% potassium hydroxide, which reveals the typical 'spaghetti and meatball' appearance, or by a skin biopsy in doubtful cases. Here, we describe a case of extensive atrophic pityriasis versicolor occurring in a woman affected by Sjögren's syndrome which completely resolved after topical antifungal treatment. 2017 BMJ Publishing Group Ltd.

  11. Acute myeloneuropathy: An uncommon presentation of Sjögren′s syndrome

    Directory of Open Access Journals (Sweden)

    Rajesh Verma

    2013-01-01

    Full Text Available Sjögren′s syndrome is associated with central and peripheral nervous system involvement. The peripheral neuropathy is usually a sensory predominant neuropathy or a cranial neuropathy. Myelopathy is usually of focal, subacute, chronic or relapsing type. Acute myeloneuropathy as the predominant manifestation has not been described in the literature. We describe a middle aged woman who presented with an acute onset motor quadriparesis and bladder dysfunction. She had dryness of eyes and mouth for 8 months. Nerve conduction studies revealed motor axonal neuropathy and magnetic resonance imaging of spinal cord showed T2 hyperintensities involving entire cord. Mild perineural fibrosis, focal foamy changes in endoneurium and lymphocytic infiltration were seen in sural nerve biopsy specimen. Patient improved clinically after intravenous methylprednisolone therapy.

  12. Primary Sjögren's syndrome: oral aspects on pathogenesis, diagnostic criteria, clinical features and approaches for therapy

    DEFF Research Database (Denmark)

    Pedersen, A.M.; Nauntofte, Birgitte

    2001-01-01

    diagnostic criteria, labial salivary gland histopathology, primary Sjögren's syndrome, salivary gland function, therapy, xerostomia......diagnostic criteria, labial salivary gland histopathology, primary Sjögren's syndrome, salivary gland function, therapy, xerostomia...

  13. Síndrome Sjögren - Larsson

    Directory of Open Access Journals (Sweden)

    Leonardo Portela Rabello

    2011-12-01

    Full Text Available Relatam-se os casos de dois irmãos consanguíneos com síndrome de Sjögren- Larsson, enfatizando a importância clínica do exame oftalmológico. BPLS, masculino, 11 anos e MBLS, feminino, 10 anos, irmãos de pais não-consanguíneos, apresentando ictiose congênita, diplegia espástica e retardo mental. Ao exame oftalmológico, apresentavam miopia, fotofobia, baixa acuidade visual. A fundoscopia, presença de cristais branco-amarelados em área foveal e parafoveal em ambos os olhos. Aconselhamento genético foi realizado. O manejo foi de suporte. A Síndrome de Sjögren-Larsson é uma rara doença autossômica recessiva em que há 100% de penetrância. Síndrome de Sjögren-Larsson é classicamente caracterizada por ictiose, espasticidade e deficiência mental. A doença é causada por mutações no gene aldeído desidrogenase. As alterações oculares observadas são geralmente bilaterais, cristais branco-amarelados em área retiniana, que aparecem nos dois primeiros anos de vida e que vão aumentando em número com a idade. As anormalidades oculares não têm relação com a severidade da ictiose ou com as anormalidades neurológicas. Acredita-se que as lesões oftalmológicas sejam um sinal patognomônico da síndrome. É necessário enfatizar a importância do diagnóstico precoce e possibilidades de tratamento dietético.

  14. Outcome measures for primary Sjögren's syndrome.

    Science.gov (United States)

    Seror, Raphaèle; Bootsma, Hendrika; Bowman, Simon J; Dörner, Thomas; Gottenberg, Jacques-Eric; Mariette, Xavier; Ramos-Casals, Manel; Ravaud, Philippe; Theander, Elke; Tzioufas, Athanasios; Vitali, Claudio

    2012-08-01

    Lymphocytic infiltration of different exocrine and non-exocrine epithelia is the pathological hallmark of primary Sjögren's syndrome, whereas involvement of salivary and lachrymal glands with the clinical counterpart of dry eye and dry mouth are the predominant features of the disease, together with fatigue and musculoskeletal pain. In addition, systemic manifestations, like arthritis, skin vasculitis, peripheral neuropathy, glomerulonephritis, may also be present in a consistent number of patients. As result, clinical features in SS can be divided into two facets: the benign subjective but disabling manifestations such as dryness, pain and fatigue, and the systemic manifestations. In the past decades, a core set of domains, which included sicca symptoms, objective measurements of tear and saliva production, fatigue, quality of life, disease activity and damage was indicated as essential for outcome assessment in this disorder. Afterwards, great efforts have been made to develop valid tools for the assessment of different domains. Specific questionnaires such as the Profile of Fatigue and Discomfort (PROFAD) and Sicca Symptoms Inventory (SSI) have been proposed as dedicated tools for the evaluation of patients symptoms, whereas different composite indexes have been suggested for the assessment of disease activity and damage. Some of these preliminary studies served as bases of an international project supported by EULAR, aimed at developing two consensus disease activity indexes: the EULAR Sjögren's Syndrome Patients Reported Index (ESSPRI), and the EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI), a systemic activity index to assess systemic manifestations. A detailed and critical review of all these indexes is provided in this article. Both EULAR indexes showed, in recent studies, to be feasible, valid, and reliable instruments. After their final validation, which is currently in process, they could be used as consensus outcome criteria in therapeutic

  15. Jumping without using legs: the jump of the click-beetles (Elateridae is morphologically constrained.

    Directory of Open Access Journals (Sweden)

    Gal Ribak

    Full Text Available To return to their feet, inverted click-beetles (Elateridae jump without using their legs. When a beetle is resting on its dorsal side, a hinge mechanism is locked to store elastic energy in the body and releases it abruptly to launch the beetle into the air. While the functional morphology of the jumping mechanism is well known, the level of control that the beetle has over this jumping technique and the mechanical constraints governing the jumps are not entirely clear. Here we show that while body rotations in air are highly variable, the jumps are morphologically constrained to a constant "takeoff" angle (79.9°±1.56°, n = 9 beetles that directs 98% of the jumping force vertically against gravity. A physical-mathematical model of the jumping action, combined with measurements from live beetle, imply that the beetle may control the speed at takeoff but not the jumping angle. In addition, the model shows that very subtle changes in the exact point of contact with the ground can explain the vigorous rotations of the body seen while the beetle is airborne. These findings suggest that the evolution of this unique non-legged jumping mechanism resulted in a jumping technique that is capable of launching the body high into the air but it is too constrained and unstable to allow control of body orientation at landing.

  16. Realized Jump Risk and Equity Return in China

    Directory of Open Access Journals (Sweden)

    Guojin Chen

    2014-01-01

    Full Text Available We utilize the realized jump components to explore a new jump (including nonsystematic jump and systematic jump risk factor model. After estimating daily realized jumps from high-frequency transaction data of the Chinese A-share stocks, we calculate monthly jump size, monthly jump standard deviation, and monthly jump arrival rate and then use those monthly jump factors to explain the return of the following month. Our empirical results show that the jump tail risk can explain the equity return. For the large capital-size stocks, large cap stock portfolios, and index, one-month lagged jump risk factor significantly explains the asset return variation. Our results remain the same even when we add the size and value factors in the robustness tests.

  17. JUMPING PARAMETER ANALYSIS OVER A TRIPLE BAR IN YOUNG SPORT HORSES

    Directory of Open Access Journals (Sweden)

    Flavia Bochis

    2013-10-01

    Full Text Available There are a lot of obstacles type used in jumping competitions. Normally, for every kind of fence, there is a different type of approaching and cross over. The most used obstacles are the vertical fence, the oxer fence and the triple bar. For crossing over the vertical, which is a high fence, the horse must jump only in report to the height of the bar. In the large obstacles case (oxer or triple bar, the horse must jump related to the height and the largeness of it indeed. The triple bar is an even greater obstacle than the oxer. It consists of three verticals and has a spread between each of the verticals. That is why the triple bar is the widest obstacle of the three types described. Many riders don't like this horse jump because it can look intimidating, but the fact is that most horses find it to be fairly easy. The investigation was made on a triple bar jumped in two schedules. The purpose was to measure four parameters for every jump: the taking-off distance, the landing distance, and the distance between bar and legs for the front limbs and for the hind limbs looking to some training aspects, and their influence indeed.

  18. Achievements of Space Scientific Experiments Aboard SJ-8 Satellite

    Institute of Scientific and Technical Information of China (English)

    XIE Jingchang; WAN Shixin; ZHANG Pu; LIN Hai; LIU Fang; HU Wenrui

    2008-01-01

    As scientific experiment payloads, microgravity experiments of fluid physics, life science,combustion science, physics and accelerator measurement were conducted on board the Chinese recoverable satellite SJ-8 during 18-day orbital flight. The experimental payloads and an experiment support system constituted the microgravity experiment system of the flight mission. This article has presented the briefs of the scientific achievements of these space experiments, the composition and performance of the Microgravity Experimental System (MES) and the general picture of the overall flight mission, respectively.

  19. Influence of muscle-tendon unit structure on rate of force development during the squat, countermovement, and drop jumps.

    Science.gov (United States)

    Earp, Jacob E; Kraemer, William J; Cormie, Prue; Volek, Jeffery S; Maresh, Carl M; Joseph, Michael; Newton, Robert U

    2011-02-01

    Previous research has highlighted the importance of muscle and tendon structure to stretch shortening cycle performance. However, the relationships between muscle and tendon structure to performance are highly dependent on the speed and intensity of the movement. The purpose of this study was to determine if muscle and tendon structure is associated with the rate of force development (RFD) throughout static squat jump (SJ), countermovement jump (CMJ), and drop jump (DJ; 30-cm height). Twenty-five strength- and power-trained men participated in the study. Using ultrasonography, vastus lateralis (VL) and gastrocnemius (GAS) pennation (PEN) and fascicle length (FL), and Achilles tendon (AT) thickness and length were measured. Subjects then performed SJ, CMJ, and DJ, during which RFD was calculated over time 5 distinct time intervals. During CMJs, early RFD could be predicted between 0 and 10 milliseconds by both GAS-FL (r² = 0.213, β = 0.461) and AT-length (r² = 0.191, β = 20.438). Between 10 and 30 milliseconds GAS-FL was a significant predictor of CMJ-RFD (r² = 0.218, β = 0.476). During DJ, initial RFD (0-10 milliseconds) could be significantly predicted by GAS-FL (r² = 0.185, β = 20.434), VL-PEN (r² = 0.189, β = 0.435), and GAS-PEN (r² = 0.188, β = 0.434). These findings suggest that longer ATs may have increased elasticity, which can decrease initial RFD during CMJ; thus, their use in talent identification is not recommended. The GAS fascicle length had an intensity-dependent relationship with RFD, serving to positively predict RFD during early CMJs and an inverse predictor during early DJs. During DDJs, subjects with greater PEN were better able to redirected initial impact forces. Although both strength and plyometric training have been shown to increase FL, only heavy strength training has been shown to increase PEN. Thus, when a high eccentric load or multiple jumps are required, heavy strength training might be used to elicit muscular adaptations

  20. Det Hellige Rum’. Sjælesorg på hospitaler

    DEFF Research Database (Denmark)

    Boelsbjerg, Hanne Bess

    2013-01-01

    at patienten giver udtryk for et behov for at dele sine eksistentielle og eventuelt religiøse overvejelser. Artiklen undersøger hvordan udøves sjælesorg på hospitaler. Indsigten opnås gennem interview med 15 sjælesørgere med enten kristen eller muslimsk baggrund og en deltagerobservation af en...

  1. Primary Sjögren's syndrome and keratoconjunctivitis sicca: Diagnostic methods, frequency and social disease aspects

    DEFF Research Database (Denmark)

    Bjerrum, Kirsten Birgitte

    ophthalmology, Sjögren's syndrome, keratoconjunctivitis sicca, conjunctiva, dry eye, Schirmer-1 test, Rose Bengal score, break-up time, tear film, Copenhagen criteria......ophthalmology, Sjögren's syndrome, keratoconjunctivitis sicca, conjunctiva, dry eye, Schirmer-1 test, Rose Bengal score, break-up time, tear film, Copenhagen criteria...

  2. Primary Sjögren's syndrome: Salivary gland function and clinical oral findings

    DEFF Research Database (Denmark)

    Pedersen, A.M.; Reibel, J.; Nordgarden, H.;

    1999-01-01

    primary Sjögren's syndrome, saliva, sodium, potassium, statherin, proline-rich proteins, salivary gland biopsy, dental and periodontal status, oral mucosa......primary Sjögren's syndrome, saliva, sodium, potassium, statherin, proline-rich proteins, salivary gland biopsy, dental and periodontal status, oral mucosa...

  3. Is YouTube useful as a source of information for Sjögren's syndrome?

    NARCIS (Netherlands)

    Delli, K; Livas, C; Vissink, A; Spijkervet, Fkl

    2016-01-01

    OBJECTIVES: To quantitatively and qualitatively assess the characteristics of YouTube videos dealing with Sjögren's syndrome. MATERIALS & METHODS: A comprehensive electronic search was performed for 'Sjögren's syndrome' in YouTube. After excluding duplicates, irrelevant videos, and non-English-langu

  4. Detailed Analysis of the Articular Domain in Patients with Primary Sjögren Syndrome

    NARCIS (Netherlands)

    Arends, Suzanne; Meiners, Petra M; Moerman, Rada V; Vissink, Arjan; Spijkervet, Frederik K L; Kroese, Frans G M; Brouwer, Elisabeth; Bootsma, Hendrika

    2017-01-01

    OBJECTIVE: We used the 28-joint Disease Activity Score (DAS28) and the European League Against Rheumatism Sjögren's Syndrome Disease Activity Index (ESSDAI) articular domain to assess the effect of rituximab (RTX) and abatacept (ABA) on articular involvement in primary Sjögren syndrome (pSS). METHOD

  5. Primary Sjögren's syndrome: Salivary gland function and clinical oral findings

    DEFF Research Database (Denmark)

    Pedersen, A.M.; Reibel, J.; Nordgarden, H.

    1999-01-01

    primary Sjögren's syndrome, saliva, sodium, potassium, statherin, proline-rich proteins, salivary gland biopsy, dental and periodontal status, oral mucosa......primary Sjögren's syndrome, saliva, sodium, potassium, statherin, proline-rich proteins, salivary gland biopsy, dental and periodontal status, oral mucosa...

  6. Bubble visualization in a simulated hydraulic jump

    CERN Document Server

    Witt, Adam; Shen, Lian

    2013-01-01

    This is a fluid dynamics video of two- and three-dimensional computational fluid dynamics simulations carried out at St. Anthony Falls Laboratory. A transient hydraulic jump is simulated using OpenFOAM, an open source numerical solver. A Volume of Fluid numerical method is employed with a realizable k-epsilon turbulence model. The goal of this research is to model the void fraction and bubble size in a transient hydraulic jump. This fluid dynamics video depicts the air entrainment characteristics and bubble behavior within a hydraulic jump of Froude number 4.82.

  7. Primary Sjögren′s syndrome without ocular involvement: A rare case report

    Directory of Open Access Journals (Sweden)

    Tushar Phulambrikar

    2014-01-01

    Full Text Available Sjögren′s Syndrome (SS is a chronic systemic autoimmune disorder, characterized by the lymphocytic infiltration of lacrimal and salivary glands, giving rise to dry eyes (keratoconjunctivitis sicca and dry mouth (xerostomia. Primary Sjögren′s Syndrome commonly presents only with sicca manifestations; whereas, secondary Sjögren′s syndrome occurs in connection with other autoimmune rheumatic diseases. Primary Sjögren′s syndrome without ocular manifestation is rarely reported in the literature. Here we report a case of a 45-year-old female, who presented to us with complaints of dryness of mouth and dysphagia, without any ocular and systemic manifestations. On further evaluation she was diagnosed as a case of Primary Sjögren′s syndrome. With this case report, we intend to emphasize the importance of an early diagnosis of this disorder, along with a brief review of various diagnostic criteria.

  8. [Urolithiasis due to renal tubular acidosis associated with Sjögren's syndrome].

    Science.gov (United States)

    Umekawa, T; Esa, A; Uemura, T; Kohri, K; Kurita, T; Ishikawa, Y; Iguchi, M; Kataoka, K

    1990-03-01

    We encountered 4 patients with urolithiasis due to renal tubular acidosis (RTA) associated with Sjögren's syndrome. Laboratory results about RTA in 4 patients with Sjögrenhs syndrome were not significantly different from those in patients who suffered from urolithiasis due to RTA without Sjögren's syndrome. The incidence of urolitiasis in these cases was suspected to be higher than that in RTA patients without Sjögren's syndrome, because all 4 patients in this study had urolithiasis. When we examine patients with bilateral and multiple urolithiasis, particularly in middle-aged women, we should bear in mind that RTA and Sjögren's syndrome may exist in the background.

  9. Posttranslational Protein Modification in the Salivary Glands of Sjögren's Syndrome Patients.

    Science.gov (United States)

    Herrera-Esparza, Rafael; Rodríguez-Rodríguez, Mayra; Pérez-Pérez, María Elena; Badillo-Soto, Martha Adriana; Torres-Del-Muro, Felipe; Bollain-Y-Goytia, Juan José; Pacheco-Tovar, Deyanira; Avalos-Díaz, Esperanza

    2013-01-01

    The present study investigated posttranslational reactions in the salivary glands of patients with Sjögren's syndrome. We analysed the biopsies of primary Sjögren's patients using immunohistochemistry and a tag-purified anticyclic citrullinated protein (CCP) antibody to detect citrullinated peptides, and the presence of peptidylarginine deiminase 2 (PAD2) was assessed simultaneously. The present work demonstrated the weak presence of the PAD2 enzyme in some normal salivary glands, although PAD2 expression was increased considerably in Sjögren's patients. The presence of citrullinated proteins was also detected in the salivary tissues of Sjögren's patients, which strongly supports the in situ posttranslational modification of proteins in this setting. Furthermore, the mutual expression of CCP and PAD2 suggests that this posttranslational modification is enzyme dependent. In conclusion, patients with Sjögren's syndrome expressed the catalytic machinery to produce posttranslational reactions that may result in autoantigen triggering.

  10. A characterization of oil price behavior. Evidence from jump models

    Energy Technology Data Exchange (ETDEWEB)

    Gronwald, Marc [Munich Univ. (Germany). Ifo Institute - Leibniz Institute for Economic Research

    2011-11-15

    This paper is concerned with the statistical behavior of oil prices in two ways. It, firstly, applies a combined jump GARCH in order to characterize the behavior of daily, weekly as well as monthly oil prices. Secondly, it relates its empirical results to implications of Hotelling-type resource extraction models. The empirical analysis shows that oil prices are characterized by GARCH as well as conditional jump behavior and that a considerable portion of the total variance is triggered by sudden extreme price movements. This finding implies that, first, oil price signals are not reliable and, as a consequence, both finding optimal extraction paths and decisions regarding the transmission to alternative technologies are likely to be compromised. Second, this behavior is in stark contrast to the notion of deterministic trends in the price of oil. (orig.)

  11. Analysis and design of Markov jump systems with complex transition probabilities

    CERN Document Server

    Zhang, Lixian; Shi, Peng; Zhu, Yanzheng

    2016-01-01

    The book addresses the control issues such as stability analysis, control synthesis and filter design of Markov jump systems with the above three types of TPs, and thus is mainly divided into three parts. Part I studies the Markov jump systems with partially unknown TPs. Different methodologies with different conservatism for the basic stability and stabilization problems are developed and compared. Then the problems of state estimation, the control of systems with time-varying delays, the case involved with both partially unknown TPs and uncertain TPs in a composite way are also tackled. Part II deals with the Markov jump systems with piecewise homogeneous TPs. Methodologies that can effectively handle control problems in the scenario are developed, including the one coping with the asynchronous switching phenomenon between the currently activated system mode and the controller/filter to be designed. Part III focuses on the Markov jump systems with memory TPs. The concept of σ-mean square stability is propo...

  12. The Crown Bite Jumping Herbst.

    Science.gov (United States)

    Owen, Reuel

    2003-01-01

    The Crown Bite Jumping Herbst Appliance is evaluated and combined with Straight Wire Arch Fixed Orthodontics in treatment of Class II, Division I malocclusions. This article will evaluate a combined orthodontic approach of "straightening teeth" and an orthognathic approach of "moving jaws or making skeletal changes." Orthodontic treatment cannot be accomplished well without establishing a healthy temporomandibular joint. This is defined by Keller as a joint that is "noiseless, painless and has a normal range of motion without deviation and deflection." It is not prudent to separate orthodontic treatment as its own entity without being aware of the changes in the temporomandibular joint before, during and after treatment. In other words, "If you're doing orthodontics you're doing TMJ treatment." One should treat toward a healthy, beautiful face asking, "Will proposed treatment achieve this goal?" Treatment should be able to be carried out in an efficient manner, minimizing treatment time, be comfortable and affordable for the patient, and profitable for the dentist. The finished treatment should meet Andrews' Six Keys of Occlusion, or Loudon's Twelve Commandments. Above all, do no harm to the patient. We think that a specific treatment plan can embrace these tenets. The focus will be to show Class II treatment using a modified Herbst Appliance and fixed straight wire orthodontics.

  13. Volatility jumps and their economic determinants

    DEFF Research Database (Denmark)

    Caporin, Massimiliano; Rossi, Eduardo; Santucci de Magistris, Paolo

    that there is a positive probability of jumps in volatility. A common factor in the volatility jumps is shown to be related to a set of financial covariates (such as variance risk premium, S&P500 volume, credit-default swap, and federal fund rates). The credit-default swap on US banks and variance risk premium have...... predictive power on expected jump moves, thus confirming the common interpretation that sudden and large increases in equity volatility can be anticipated by credit deterioration of the US bank sector as well as changes in the market expectations of future risks. Finally, the model is extended to incorporate...... the credit-default swap and the variance risk premium in the dynamics of the jump size and intensity....

  14. TSP-1 Deficiency Alters Ocular Microbiota: Implications for Sjögren's Syndrome Pathogenesis.

    Science.gov (United States)

    Terzulli, Marielle; Contreras-Ruiz, Laura; Ruiz, Laura Contreras; Kugadas, Abirami; Masli, Sharmila; Gadjeva, Mihaela

    2015-09-01

    The potential role of commensals as triggering factors that promote inflammation in dry eye disease has not been explored. The objective of this study was to evaluate whether ocular microbiota changes with the onset of dry eye disease in thrombospondin-1-deficient (TSP-1(-/-)) mice, a strain that develops Sjögren's syndrome-like disease. Conjunctival swabs were collected from TSP-1(-/-) and C57BL/6 mice and analyzed for bacterial presence. Opsonophagocytosis of the bacterial conjunctival isolates derived from the aged TSP-1(-/-) mice by neutrophils derived from either TSP-1(-/-) or C57BL/6 bone marrow was evaluated. The bactericidal activities of TSP-1-derived peptide were examined. We found that in TSP-1(-/-) mice, the conjunctival colonization with Staphylococcus aureus and coagulase negative staphylococci sp (CNS) species was significantly increased with aging and preceded that of the wild-type C57BL/6 control mice. This correlated with increased neutrophil infiltration into the conjunctiva of the TSP-1(-/-) mice, suggesting that TSP-1 plays a significant role in regulating immunity to commensals. Accordingly, the TSP-1(-/-) PMNs opsonophagocytozed the ocular commensals less efficiently than the TSP-1-sufficient neutrophils. Furthermore, a TSP-1-derived peptide, 4N1K, exhibited significant antimicrobial activity when compared to a control peptide against commensal sp. These studies illustrate that alterations in the commensal frequency occur in the early stages of development of Sjögren's-like pathology and suggest that interventions that limit commensal outgrowth such as the use of TSP-1-derived peptides could be used for treatment during the early stages of the disease to reduce the commensal burden and ensuing inflammation.

  15. Jump Horse Safety: Reconciling Public Debate and Australian Thoroughbred Jump Racing Data, 2012-2014.

    Science.gov (United States)

    Ruse, Karen; Davison, Aidan; Bridle, Kerry

    2015-10-22

    Thoroughbred jump racing sits in the spotlight of contemporary welfare and ethical debates about horse racing. In Australia, jump racing comprises hurdle and steeplechase races and has ceased in all but two states, Victoria and South Australia. This paper documents the size, geography, composition, and dynamics of Australian jump racing for the 2012, 2013, and 2014 seasons with a focus on debate about risks to horses. We found that the majority of Australian jump racing is regional, based in Victoria, and involves a small group of experienced trainers and jockeys. Australian jump horses are on average 6.4 years of age. The jump career of the majority of horses involves participating in three or less hurdle races and over one season. Almost one quarter of Australian jump horses race only once. There were ten horse fatalities in races over the study period, with an overall fatality rate of 5.1 fatalities per 1000 horses starting in a jump race (0.51%). There was significant disparity between the fatality rate for hurdles, 0.75 fatalities per 1000 starts (0.075%) and steeplechases, 14 fatalities per 1000 starts (1.4%). Safety initiatives introduced by regulators in 2010 appear to have significantly decreased risks to horses in hurdles but have had little or no effect in steeplechases. Our discussion considers these Animals 2015, 5 1073 data in light of public controversy, political debate, and industry regulation related to jump horse safety.

  16. Jump Horse Safety: Reconciling Public Debate and Australian Thoroughbred Jump Racing Data, 2012–2014

    Directory of Open Access Journals (Sweden)

    Karen Ruse

    2015-10-01

    Full Text Available Thoroughbred jump racing sits in the spotlight of contemporary welfare and ethical debates about horse racing. In Australia, jump racing comprises hurdle and steeplechase races and has ceased in all but two states, Victoria and South Australia. This paper documents the size, geography, composition, and dynamics of Australian jump racing for the 2012, 2013, and 2014 seasons with a focus on debate about risks to horses. We found that the majority of Australian jump racing is regional, based in Victoria, and involves a small group of experienced trainers and jockeys. Australian jump horses are on average 6.4 years of age. The jump career of the majority of horses involves participating in three or less hurdle races and over one season. Almost one quarter of Australian jump horses race only once. There were ten horse fatalities in races over the study period, with an overall fatality rate of 5.1 fatalities per 1000 horses starting in a jump race (0.51%. There was significant disparity between the fatality rate for hurdles, 0.75 fatalities per 1000 starts (0.075% and steeplechases, 14 fatalities per 1000 starts (1.4%. Safety initiatives introduced by regulators in 2010 appear to have significantly decreased risks to horses in hurdles but have had little or no effect in steeplechases. Our discussion considers these Animals 2015, 5 1073 data in light of public controversy, political debate, and industry regulation related to jump horse safety.

  17. Portfolio Selection with Jumps under Regime Switching

    Directory of Open Access Journals (Sweden)

    Lin Zhao

    2010-01-01

    Full Text Available We investigate a continuous-time version of the mean-variance portfolio selection model with jumps under regime switching. The portfolio selection is proposed and analyzed for a market consisting of one bank account and multiple stocks. The random regime switching is assumed to be independent of the underlying Brownian motion and jump processes. A Markov chain modulated diffusion formulation is employed to model the problem.

  18. Preschool-aged children's jumps: imitation performances.

    Science.gov (United States)

    Labiadh, Lazhar; Ramanantsoa, Marie-Martine; Golomer, Eveline

    2010-04-01

    Imitative behavior underlaid by perception and action links during children's development in complex locomotor skills has been the object of relatively few studies. In order to explore children's motor coordination modes, 130 children divided into five age groups from 3.5 to 7.5 years were instructed to imitate jumping tasks in spontaneous motor situation and in various imitative contexts by an adult providing verbal orders and gestural demonstrations. Their conformity to the model, stability and variability scores were coded from a video analysis when they performed jumps with obstacles. To evaluate their postural-motor control level, the durations of the preparatory phase and jumping flights were also timed. Results showed that all age groups generated the demonstrator's goal but not necessarily the same coordination modes of jumping. In imitation with temporal proximity, the model helped the youngest age groups to adopt his coordination modes and stabilized only the oldest age groups' performances starting from 5.5 years old, without effect on learning imitation. Differences between the youngest and oldest children in the jump duration suggested that the reproduction of a complex motor activity such as jumping with a one foot take-off would require resolution and adjustment of main postural stability.

  19. Mechanical efficiency and force–time curve variation during repetitive jumping in trained and untrained jumpers.

    Science.gov (United States)

    McBride, Jeffrey M; Snyder, James G

    2012-10-01

    Mechanical efficiency (ME), the ratio between work performed and energy expenditure, is a useful criterion in determining the roles of stored elastic energy and chemically deduced energy contributing to concentric performance in stretch-shortening cycle movements. Increased force production during the eccentric phase has been shown to relate to optimal muscle-tendon unit (MTU) length change and thus optimization of usage of stored elastic energy. This phenomenon, as previously reported, is reflected by higher jump heights and ME. The purpose of this investigation was to determine if ME may be different between trained and untrained jumpers and thus be accounted for by variation in force production in the eccentric phase as a reflection of usage of stored elastic energy during various jump types. This investigation involved 9 trained (age 20.7 ± 3.2 years, height 178.6 ± 5.3 cm, body mass 79.0 ± 5.5 kg) and 7 untrained (age 21.43 ± 2.37 years, height 176.17 ± 10.89 cm, body mass 78.8 ± 12.5 kg) male jumpers. Trained subjects were Division I track and field athletes who compete in the horizontal or vertical jumping or running events. Force-time and displacement-time curves were obtained during jumping to determine jump height and to calculate work performed and to observe possible differences in force production in the eccentric phase. Respiratory gases with a metabolic cart were obtained during jumping to calculate energy expenditure. ME was calculated as the ratio between work performed and energy expenditure. The subjects completed four sessions involving 20 repetitions of countermovement jumps (CMJ) and drop jumps from 40 cm (DJ40), 60 cm (DJ60) and 80 cm (DJ80). The trained jumpers jumped significantly higher in the CMJ, DJ40, DJ60 and DJ80 conditions than their untrained counterparts (p ≤ 0.05). ME was significantly higher in the trained in comparison to the untrained jumpers during DJ40. The amount of negative work during all jump types was

  20. Potential Role of Free Fatty Acids in the Pathogenesis of Periodontitis and Primary Sjögren's Syndrome.

    Science.gov (United States)

    Shikama, Yosuke; Kudo, Yasusei; Ishimaru, Naozumi; Funaki, Makoto

    2017-04-14

    Clinical studies have shown that metabolic disorders such as type 2 diabetes and dyslipidemia are associated with increased risk of oral-related diseases, such as periodontitis and Sjögren's syndrome. Although changes in the immune system are critical in both of these metabolic disorders and oral-related diseases, the mechanism underlying the interaction between these diseases remains largely unknown. Obesity and type 2 diabetes are known to be associated with higher concentrations of free fatty acids in blood. Among free fatty acids, saturated fatty acids such as palmitic acid have been demonstrated to induce inflammatory responses mainly via the innate immune systems, and to be involved in the pathogenesis of type 2 diabetes in tissues such as adipose tissue, liver, pancreas, and skeletal muscle. Here, we highlight recent advances in evidence for the potential involvement of palmitic acid in the pathogenesis of periodontitis and Sjögren's syndrome, and discuss the possibility that improvement of the lipid profile could be a new strategy for the treatment of these diseases.

  1. Performance analysis of jump-gliding locomotion for miniature robotics.

    Science.gov (United States)

    Vidyasagar, A; Zufferey, Jean-Christohphe; Floreano, Dario; Kovač, M

    2015-03-26

    Recent work suggests that jumping locomotion in combination with a gliding phase can be used as an effective mobility principle in robotics. Compared to pure jumping without a gliding phase, the potential benefits of hybrid jump-gliding locomotion includes the ability to extend the distance travelled and reduce the potentially damaging impact forces upon landing. This publication evaluates the performance of jump-gliding locomotion and provides models for the analysis of the relevant dynamics of flight. It also defines a jump-gliding envelope that encompasses the range that can be achieved with jump-gliding robots and that can be used to evaluate the performance and improvement potential of jump-gliding robots. We present first a planar dynamic model and then a simplified closed form model, which allow for quantification of the distance travelled and the impact energy on landing. In order to validate the prediction of these models, we validate the model with experiments using a novel jump-gliding robot, named the 'EPFL jump-glider'. It has a mass of 16.5 g and is able to perform jumps from elevated positions, perform steered gliding flight, land safely and traverse on the ground by repetitive jumping. The experiments indicate that the developed jump-gliding model fits very well with the measured flight data using the EPFL jump-glider, confirming the benefits of jump-gliding locomotion to mobile robotics. The jump-glide envelope considerations indicate that the EPFL jump-glider, when traversing from a 2 m height, reaches 74.3% of optimal jump-gliding distance compared to pure jumping without a gliding phase which only reaches 33.4% of the optimal jump-gliding distance. Methods of further improving flight performance based on the models and inspiration from biological systems are presented providing mechanical design pathways to future jump-gliding robot designs.

  2. Jump Horse Safety: Reconciling Public Debate and Australian Thoroughbred Jump Racing Data, 2012–2014

    Science.gov (United States)

    Ruse, Karen; Davison, Aidan; Bridle, Kerry

    2015-01-01

    Simple Summary This paper documents the dynamics of Australian thoroughbred jump racing in the 2012, 2013, and 2014 seasons with the aim of informing debate about risks to horses and the future of this activity. We conclude that the safety of Australian jump racing has improved in recent years but that steeplechases are considerably riskier for horses than hurdle races. Abstract Thoroughbred jump racing sits in the spotlight of contemporary welfare and ethical debates about horse racing. In Australia, jump racing comprises hurdle and steeplechase races and has ceased in all but two states, Victoria and South Australia. This paper documents the size, geography, composition, and dynamics of Australian jump racing for the 2012, 2013, and 2014 seasons with a focus on debate about risks to horses. We found that the majority of Australian jump racing is regional, based in Victoria, and involves a small group of experienced trainers and jockeys. Australian jump horses are on average 6.4 years of age. The jump career of the majority of horses involves participating in three or less hurdle races and over one season. Almost one quarter of Australian jump horses race only once. There were ten horse fatalities in races over the study period, with an overall fatality rate of 5.1 fatalities per 1000 horses starting in a jump race (0.51%). There was significant disparity between the fatality rate for hurdles, 0.75 fatalities per 1000 starts (0.075%) and steeplechases, 14 fatalities per 1000 starts (1.4%). Safety initiatives introduced by regulators in 2010 appear to have significantly decreased risks to horses in hurdles but have had little or no effect in steeplechases. Our discussion considers these data in light of public controversy, political debate, and industry regulation related to jump horse safety. PMID:26506396

  3. Jumping to conclusions in schizophrenia

    Directory of Open Access Journals (Sweden)

    Evans SL

    2015-07-01

    Full Text Available Simon L Evans,1 Bruno B Averbeck,2 Nicholas Furl31School of Psychology, University of Sussex, Brighton, East Sussex, UK; 2Laboratory of Neuropsychology, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA; 3Department of Psychology, Royal Holloway, University of London, Egham, Surrey, UKAbstract: Schizophrenia is a mental disorder associated with a variety of symptoms, including hallucinations, delusions, social withdrawal, and cognitive dysfunction. Impairments on decision-making tasks are routinely reported: evidence points to a particular deficit in learning from and revising behavior following feedback. In addition, patients tend to make hasty decisions when probabilistic judgments are required. This is known as “jumping to conclusions” (JTC and has typically been demonstrated by presenting participants with colored beads drawn from one of two “urns” until they claim to be sure which urn the beads are being drawn from (the proportions of colors vary in each urn. Patients tend to make early decisions on this task, and there is evidence to suggest that a hasty decision-making style might be linked to delusion formation and thus be of clinical relevance. Various accounts have been proposed regarding what underlies this behavior. In this review, we briefly introduce the disorder and the decision-making deficits associated with it. We then explore the evidence for each account of JTC in the context of a wider decision-making deficit and then go on to summarize work exploring JTC in healthy controls using pharmacological manipulations and functional imaging. Finally, we assess whether JTC might have a role in therapy.Keywords: ketamine, decision making, delusions, fMRI, urn task

  4. Early diagnosis of primary Sjögren's syndrome: EULAR-SS task force clinical recommendations.

    Science.gov (United States)

    Brito-Zerón, Pilar; Theander, Elke; Baldini, Chiara; Seror, Raphaèle; Retamozo, Soledad; Quartuccio, Luca; Bootsma, Hendrika; Bowman, Simon J; Dörner, Thomas; Gottenberg, Jacques-Eric; Mariette, Xavier; Bombardieri, Stefano; de Vita, Salvatore; Mandl, Thomas; Ng, Wan-Fai; Kruize, Aike A; Tzioufas, Athanasios; Vitali, Claudio; Buyon, Jill; Izmirly, Peter; Fox, Robert; Ramos-Casals, Manuel

    2016-01-01

    Sjögren's syndrome (SjS) is a systemic autoimmune disease that mainly affects the exocrine glands, leading to generalized mucosal dryness. However, primary SjS may initially present with non-sicca (systemic) manifestations. When these features appear before the onset of an overt sicca syndrome, we may talk of an underlying 'occult' SjS. The European League Against Rheumatism (EULAR) has promoted and supported an international collaborative study group (EULAR-SS Task Force) aimed at developing consensual recommendations to provide a homogeneous approach to the patient with primary SjS presenting with systemic involvement. This review summarizes the key factors that should be taken into account in the diagnostic approach in a patient with suspected SjS according to the main clinical patterns of presentation, and is especially focused on organ-specific systemic disease presentations, including a consensus set of recommendations in order to reach an early diagnosis. Close collaboration with the different specialties involved through a comprehensive multidisciplinary approach is essential in SjS patients presenting with systemic involvements.

  5. COMPARISON OF THREE KINESIO TECHNIQUE APPLICATION ON JUMPING IN COLLEGIATE FEMALE ATHLETES

    Directory of Open Access Journals (Sweden)

    Kailash Sharma

    2015-06-01

    Full Text Available Background: Kinesio Tape (KT is a somewhat new type of taping technique gaining popularity as both treatment and performance enhancement tool. Considering the fact that KT can improve muscle performance, however, limited research has been done on the different technique of strips application of KT on functional performance. Therefore purpose of this study is to compare Comparison of three kinesio technique application on jumping in collegiate female athletes. Methods: 45 healthy collegiate female athletes were recruited based on inclusion and exclusion criteria. The subjects were randomly divided into three equal groups (group I, n=15, Group II, n=15 & group III, n=15. Group I received Y application of kinesio taping, Group II received I application of kinesio taping while, Group III underwent combined Y & I application of kinesio tape on triceps surae. Pre and post measurement of vertical jump (in terms of power average, power peak and horizontal distance were documented. Results: Statistically significant differences were found between the difference power average, difference power peak and difference horizontal jump in group I, II and III (p<0.001. Within group comparison also revealed statistically significant differences in power average, power peak and horizontal jump in all the three groups (p<0.001. Conclusion: Combined technique (Y and I application of kinesio was more effective in improving vertical jump (power average, power peak and horizontal jump as compared to Y and I application alone.

  6. The hydraulic jump in radially spreading flow: A new model and new experimental data

    Science.gov (United States)

    Blackford, B. L.

    1996-02-01

    A new model for the hydraulic jump in radially spreading flow is presented. The equation of motion for a liquid annulus spreading out under the influence of hydrostatic pressure gradient and Frictional drag is developed. The resulting nonlinear differential equation for the liquid depth, h(r), is solved by computer simulation. The jump is assumed to begin when the laminar flow is engulfed by the underlying boundary layer liquid, as suggested recently in the literature. This complicated mixing process is crudely modeled by a drag term which slows the flow and initiates a positive feedback mechanism culminating at a new critical depth, beyond which the depth increases asymptotically to a final value. The model predicts a new relationship between the laminar flow depth just before the jump and the final depth. An experimental apparatus was built to make detailed measurements of the depth h(r), both in the region before the jump and beyond the jump. The theoretical predictions were compared to the experimental data, and gave surprisingly good agreement by suitable adjustment of the two parameters k and C of the model. The parameter k determines the growth rate of the boundary layer thickness, and C determines the drag force. The results suggest that the usual textbook assumption of zero momentum loss across the jump is not appropriate for this type of hydraulic jump. The case of a hydraulic jump in the absence of gravity is considered also and a much different behavior is predicted, which could be tested by experiment in a microgravity environment.

  7. Is energy expenditure taken into account in human sub-maximal jumping?--A simulation study.

    Science.gov (United States)

    Vanrenterghem, Jos; Bobbert, Maarten F; Casius, L J Richard; De Clercq, Dirk

    2008-02-01

    This paper presents a simulation study that was conducted to investigate whether the stereotyped motion pattern observed in human sub-maximal jumping can be interpreted from the perspective of energy expenditure. Human sub-maximal vertical countermovement jumps were compared to jumps simulated with a forward dynamic musculo-skeletal model. This model consisted of four interconnected rigid segments, actuated by six Hill-type muscle actuators. The only independent input of the model was the stimulation of muscles as a function of time. This input was optimized using an objective function, in which targeting a specific sub-maximal height value was combined with minimizing the amount of muscle work produced. The characteristic changes in motion pattern observed in humans jumping to different target heights were reproduced by the model. As the target height was lowered, two major changes occurred in the motion pattern. First, the countermovement amplitude was reduced; this helped to save energy because of reduced dissipation and regeneration of energy in the contractile elements. Second, the contribution of rotation of the heavy proximal segments of the lower limbs to the vertical velocity of the centre of gravity at take-off was less; this helped to save energy because of reduced ineffective rotational energies at take-off. The simulations also revealed that, with the observed movement adaptations, muscle work was reduced through improved relative use of the muscle's elastic properties in sub-maximal jumping. According to the results of the simulations, the stereotyped motion pattern observed in sub-maximal jumping is consistent with the idea that in sub-maximal jumping, subjects are trying to achieve the targeted jump height with minimal energy expenditure.

  8. A biomechanical comparison of the vertical jump, power clean, and jump squat.

    Science.gov (United States)

    MacKenzie, Sasho James; Lavers, Robert J; Wallace, Brendan B

    2014-01-01

    The purpose of this study was to compare the kinetics, kinematics, and muscle activation patterns of the countermovement jump, the power clean, and the jump squat with the expectation of gaining a better understanding of the mechanism of transfer from the power clean to the vertical jump. Ground reaction forces, electromyography, and joint angle data were collected from 20 trained participants while they performed the three movements. Relative to the power clean, the kinematics of the jump squat were more similar to those of the countermovement jump. The order in which the ankle, knee, and hip began extending, as well as the subsequent pattern of extension, was different between the power clean and countermovement jump. The electromyography data demonstrated significant differences in the relative timing of peak activations in all muscles, the maximum activation of the rectus femoris and biceps femoris, and in the activation/deactivation patterns of the vastus medialis and rectus femoris. The greatest rate of force development during the upward phase of these exercises was generated during the power clean (17,254 [Formula: see text]), which was significantly greater than both the countermovement jump (3836 [Formula: see text]) and jump squat (3517 [Formula: see text]) conditions (P < .001, [Formula: see text]).

  9. Higher frequency of brain abnormalities in neuromyelitis optica spectrum disorder patients without primary Sjögren’s syndrome

    Institute of Scientific and Technical Information of China (English)

    Li-na Gu; Min Zhang; Hui Zhu; Jing-yao Liu

    2016-01-01

    Neuromyelitis optica spectrum disorder otfen co-exists with primary Sjögren’s syndrome. We compared the clinical features of 16 neuro-myelitis optica spectrum disorder patients with (n = 6) or without primary Sjögren’s syndrome (n = 10). All patients underwent extensive clinical, laboratory, and MRI evaluations. hTere were no statistical differences in demographics or ifrst neurological involvement at onset between neuromyelitis optica spectrum disorder patients with and without primary Sjögren’s syndrome. The laboratory findings of cerebrospinal lfuid oligoclonal banding, serum C-reactive protein, antinuclear autoantibody, anti-Sjögren’s-syndrome-related antigen A an-tibodies, anti-Sjögren’s-syndrome-related antigen B antibodies, and anti-Sm antibodies were signiifcantly higher in patients with primary Sjö gren’s syndrome than those without. Anti-aquaporin 4 antibodies were detectable in 67% (4/6) of patients with primary Sjögren’s syndrome and in 60% (6/10) of patients without primary Sjögren’s syndrome. More brain abnormalities were observed in patients without primary Sjögren’s syndrome than in those with primary Sjögren’s syndrome. Segments lesions (> 3 centrum) were noted in 50% (5/10) of patients without primary Sjögren’s syndrome and in 67% (4/6) of patients with primary Sjögren’s syndrome. hTese ifndings indicate that the clinical characteristics of neuromyelitis optica spectrum disorder patients with and without primary Sjögren’s syndrome are similar. However, neu-romyelitis optica spectrum disorder patients without primary Sjögren’s syndrome have a high frequency of brain abnormalities.

  10. Higher frequency of brain abnormalities in neuromyelitis optica spectrum disorder patients without primary Sjögren's syndrome.

    Science.gov (United States)

    Gu, Li-Na; Zhang, Min; Zhu, Hui; Liu, Jing-Yao

    2016-10-01

    Neuromyelitis optica spectrum disorder often co-exists with primary Sjögren's syndrome. We compared the clinical features of 16 neuromyelitis optica spectrum disorder patients with (n = 6) or without primary Sjögren's syndrome (n = 10). All patients underwent extensive clinical, laboratory, and MRI evaluations. There were no statistical differences in demographics or first neurological involvement at onset between neuromyelitis optica spectrum disorder patients with and without primary Sjögren's syndrome. The laboratory findings of cerebrospinal fluid oligoclonal banding, serum C-reactive protein, antinuclear autoantibody, anti-Sjögren's-syndrome-related antigen A antibodies, anti-Sjögren's-syndrome-related antigen B antibodies, and anti-Sm antibodies were significantly higher in patients with primary Sjögren's syndrome than those without. Anti-aquaporin 4 antibodies were detectable in 67% (4/6) of patients with primary Sjögren's syndrome and in 60% (6/10) of patients without primary Sjögren's syndrome. More brain abnormalities were observed in patients without primary Sjögren's syndrome than in those with primary Sjögren's syndrome. Segments lesions (> 3 centrum) were noted in 50% (5/10) of patients without primary Sjögren's syndrome and in 67% (4/6) of patients with primary Sjögren's syndrome. These findings indicate that the clinical characteristics of neuromyelitis optica spectrum disorder patients with and without primary Sjögren's syndrome are similar. However, neuromyelitis optica spectrum disorder patients without primary Sjögren's syndrome have a high frequency of brain abnormalities.

  11. The effect of wind on jumping distance in ski jumping--fairness assessed.

    Science.gov (United States)

    Virmavirta, Mikko; Kivekäs, Juha

    2012-09-01

    The special wind compensation system recently adopted by Fédération Internationale de Ski (FIS; International Ski Federation) to consider the effects of changing wind conditions has caused some controversy. Here, the effect of wind on jumping distance in ski jumping was studied by means of computer simulation and compared with the wind compensation factors used by FIS during the World Cup season 2009/2010. The results showed clearly that the effect of increasing head/tail wind on jumping distance is not linear: +17.4 m/-29.1 m, respectively, for a wind speed of 3 m/s. The linear formula used in the trial period of the wind compensation system was found to be appropriate only for a limited range of jumping distances as the gradient of the landing slope slows down the rate of distance change in long jumps.

  12. Acute effects of a warm-up including active, passive, and dynamic stretching on vertical jump performance.

    Science.gov (United States)

    Carvalho, Felipe L P; Carvalho, Mauro C G A; Simão, Roberto; Gomes, Thiago M; Costa, Pablo B; Neto, Ludgero B; Carvalho, Rodrigo L P; Dantas, Estélio H M

    2012-09-01

    The purpose of this study was to examine the acute effects of 3 different stretching methods combined with a warm-up protocol on vertical jump performance. Sixteen young tennis players (14.5 ± 2.8 years; 175 ± 5.6 cm; 64.0 ± 11.1 kg) were randomly assigned to 4 different experimental conditions on 4 successive days. Each session consisted of a general and specific warm-up, with 5 minutes of running followed by 10 jumps, accompanied by one of the subsequent conditions: (a) Control Condition (CC)-5 minutes of passive rest; (b) Passive Stretching Condition (PSC)-5 minutes of passive static stretching; (c) Active Stretching Condition (ASC)-5 minutes of active static stretching; and (d) Dynamic Stretching Condition (DC)-5 minutes of dynamic stretching. After each intervention, the subjects performed 3 squat jumps (SJs) and 3 countermovement jumps (CMJs), which were measured electronically. For the SJ, 1-way repeated measures analysis of variance (CC × PSC × ASC × DC) revealed significant decreases for ASC (28.7 ± 4.7 cm; p = 0.01) and PSC (28.7 ± 4.3 cm; p = 0.02) conditions when compared with CC (29.9 ± 5.0 cm). For CMJs, there were no significant decreases (p > 0.05) when all stretching conditions were compared with the CC. Significant increases in SJ performance were observed when comparing the DC (29.6 ± 4.9 cm; p = 0.02) with PSC (28.7 ± 4.3 cm). Significant increases in CMJ performance were observed when comparing the conditions ASC (34.0 ± 6.0 cm; p = 0.04) and DC (33.7 ± 5.5 cm; p = 0.03) with PSC (32.6 ± 5.5 cm). A dynamic stretching intervention appears to be more suitable for use as part of a warm-up in young athletes.

  13. Design of SJ-10 Space Radiation Detector Prototype

    CERN Document Server

    Liu, Yaqing; Cui, Xingzhu; Peng, Wenxi; Fan, Ruirui; Gao, Xiaohua Liang Ming; Zhang, Yunlong; Zhang, Chengmo; Zhang, Jiayu; Yang, Jiawei; Wang, Jinzhou; Dong, Fei Zhang Yifan; Guo, Dongya; Zhou, Dawei

    2014-01-01

    The space radiation detector is a space apparatus for detecting the outer-space particles and monitoring the radiation environment. Though identifying the particles and acquiring the biological experimental data, we can learn about the space radiation impacts on the human body and defend the space radiation damage. This paper designed a prototype of the space radiation detector for SJ-10 and evaluated the performance by the system simulation. More specifically, the space radiation impacts on the human body were analyzed including the different particles, the radiation flux and the energy channels. Then the detector system based on analysis results were built by the Monte Carlo simulation. Finally, the detection algorithms of incident energy range were proposed to identify the outer-space particles and provide the reliable radiation environment data for biological experimental apparatus.

  14. Bilateral Lacrimal Gland Lymphoma in Sjögren Syndrome

    Science.gov (United States)

    Ozsan, Nazan; Sahin, Fahri

    2016-01-01

    A 31-year-old female with Primary Sjögren Syndrome (pSS) presented with bilateral puffiness around the eye for 3 years. The lacrimal glands were hypertrophic and edematous bilaterally. Schirmer 1 score was 2 and 1 mm and tear-film break-up time was 3 and 4 seconds, in the right and the left eyes, respectively. An incisional biopsy from the left lacrimal gland revealed diffuse and intense CD20, CD5, and bcl-2 positivity with negative cyclin D1 and CD23 which supported lymphoma. Upon haematology consultation extranodal marginal zone lymphoma diagnosis was made. CHOP (cyclophosphamide, doxorubicin, vincristine, and methyl prednisolone) treatment was initiated. In conclusion, pSS is a well known autoimmune disease in which increased rate of lymphoma is present. Early detection with histopathologic confirmation and multidisciplinary approach with ophthalmology, rheumatology, and haematology are mandatory in these patients.

  15. Bilateral Lacrimal Gland Lymphoma in Sjögren Syndrome

    Directory of Open Access Journals (Sweden)

    Melis Palamar

    2016-01-01

    Full Text Available A 31-year-old female with Primary Sjögren Syndrome (pSS presented with bilateral puffiness around the eye for 3 years. The lacrimal glands were hypertrophic and edematous bilaterally. Schirmer 1 score was 2 and 1 mm and tear-film break-up time was 3 and 4 seconds, in the right and the left eyes, respectively. An incisional biopsy from the left lacrimal gland revealed diffuse and intense CD20, CD5, and bcl-2 positivity with negative cyclin D1 and CD23 which supported lymphoma. Upon haematology consultation extranodal marginal zone lymphoma diagnosis was made. CHOP (cyclophosphamide, doxorubicin, vincristine, and methyl prednisolone treatment was initiated. In conclusion, pSS is a well known autoimmune disease in which increased rate of lymphoma is present. Early detection with histopathologic confirmation and multidisciplinary approach with ophthalmology, rheumatology, and haematology are mandatory in these patients.

  16. Vitamin D and Sjögren syndrome.

    Science.gov (United States)

    Garcia-Carrasco, Mario; Jiménez-Herrera, Erick Alejandro; Gálvez-Romero, Jose Luis; de Lara, Luis Vázquez; Mendoza-Pinto, Claudia; Etchegaray-Morales, Ivet; Munguía-Realpozo, Pamela; Ruíz-Argüelles, Alejandro; Jose, Rosas; Vera-Recabarren, Mauricio; Cervera, Ricard

    2017-06-01

    The immunomodulatory effects of vitamin D have been extensively studied in the context of autoimmunity. Multiple studies have demonstrated a high prevalence of vitamin D deficiency in autoimmune diseases. Recently, a possible protective role of vitamin D in autoimmunity has been described; however, this function remains controversial. Few studies have investigated the role of vitamin D in patients with Sjögren syndrome (SS). In this review, we compiled the main features of SS pathogenesis, the vitamin D immunomodulatory effects and the possible interaction between both. Data suggests that vitamin D may play a role in the SS pathogenesis. In addition, vitamin D low levels have been found in SS patients, which are associated with extra-glandular manifestations, such as lymphoma or neuropathy, suggesting a possible benefit effect of vitamin D in SS. Copyright © 2017 Elsevier B.V. All rights reserved.

  17. Enrique Gaitán S.J.

    OpenAIRE

    Espinoza de España, Maria Mercedes

    2014-01-01

    En el año 69, llegó un grupo de jóvenes jesuitas, que acababan de hacer los votos y que yo dirigía. Ellos entraron a estudiar a la Facultad de Filosofía y Letras. Teníamos la revista “Hombre y Expresión” en el Centro de Formación en Humanidades, y como aquí no había una revista, le propusimos su creación al Padre Rodolfo Eduardo de Roux, S.J., entonces Decano, quien dejó la Facultad muy pronto por lo cual no pudo atender nuestra inquietud de contar con un órgano de expresión.

  18. Filtering and control of stochastic jump hybrid systems

    CERN Document Server

    Yao, Xiuming; Zheng, Wei Xing

    2016-01-01

    This book presents recent research work on stochastic jump hybrid systems. Specifically, the considered stochastic jump hybrid systems include Markovian jump Ito stochastic systems, Markovian jump linear-parameter-varying (LPV) systems, Markovian jump singular systems, Markovian jump two-dimensional (2-D) systems, and Markovian jump repeated scalar nonlinear systems. Some sufficient conditions are first established respectively for the stability and performances of those kinds of stochastic jump hybrid systems in terms of solution of linear matrix inequalities (LMIs). Based on the derived analysis conditions, the filtering and control problems are addressed. The book presents up-to-date research developments and novel methodologies on stochastic jump hybrid systems. The contents can be divided into two parts: the first part is focused on robust filter design problem, while the second part is put the emphasis on robust control problem. These methodologies provide a framework for stability and performance analy...

  19. A locust-inspired miniature jumping robot.

    Science.gov (United States)

    Zaitsev, Valentin; Gvirsman, Omer; Ben Hanan, Uri; Weiss, Avi; Ayali, Amir; Kosa, Gabor

    2015-11-25

    Unmanned ground vehicles are mostly wheeled, tracked, or legged. These locomotion mechanisms have a limited ability to traverse rough terrain and obstacles that are higher than the robot's center of mass. In order to improve the mobility of small robots it is necessary to expand the variety of their motion gaits. Jumping is one of nature's solutions to the challenge of mobility in difficult terrain. The desert locust is the model for the presented bio-inspired design of a jumping mechanism for a small mobile robot. The basic mechanism is similar to that of the semilunar process in the hind legs of the locust, and is based on the cocking of a torsional spring by wrapping a tendon-like wire around the shaft of a miniature motor. In this study we present the jumping mechanism design, and the manufacturing and performance analysis of two demonstrator prototypes. The most advanced jumping robot demonstrator is power autonomous, weighs 23 gr, and is capable of jumping to a height of 3.35 m, covering a distance of 1.37 m.

  20. Mechanical jumping power in young athletes.

    Science.gov (United States)

    Viitasalo, J T; Osterback, L; Alen, M; Rahkila, P; Havas, E

    1987-09-01

    Mechanical jumping power was determined for 286 young male athletes representing six sports events and ranging in calendar and skeletal ages from 8.8 to 17.1 and from 7.8 to 18.1 years, respectively. The subjects performed successive maximal vertical jumps on a contact mat for 30 s. The number of jumps and their cumulative flight time after 15 and 30 s were used for calculations of mechanical power. The jumping performances of the young athletes were found to be reproducible from the age of 10-12 years in respect to the angular displacement of the knee and duration of contact. Absolute mechanical power, as well as power related to body weight, increased with calendar and skeletal ages. Of the anthropometric characteristics, the circumference of the thigh and body weight showed the highest correlation with mechanical power; subjects with the greatest thigh circumference and body weight having the lowest mechanical power. The subjects were divided into 'power' (track and field, gymnastics) and 'endurance' (skiing, orienteering) groups. The former reached higher mechanical power values than the latter. Mechanical power for the second 15-s jumping period was on average 4.7% lower than for the first. The events did not differ from each other in respect of the decrease in power.

  1. Determination of jumps for functions based on Malvar-Coifman-Meyer conjugate wavelets

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    In this paper we discuss determination of jumps for non-periodic function based on Malvar-Cofiman-Meyer (MCM) conjugate wavelets. We prove the equality of Lukacs type. Furthermore we establish several criteria on concentration factors for functions that satisfy weak-smoothness condition of Dini type.

  2. Nonlinear regimes on polygonal hydraulic jumps

    Science.gov (United States)

    Rojas, Nicolas

    2016-11-01

    This work extends previous leading and higher order results on the polygonal hydraulic jump in the framework of inertial lubrication theory. The rotation of steady polygonal jumps is observed in the transition from one wavenumber to the next one, induced by a change in height of an external obstacle near the outer edge. In a previous publication, the study of stationary polygons is considered under the assumption that the reference frame rotates with the polygons when the number of corners change, in order to preserve their orientation. In this research work I provide a Hamiltonian approach and the stability analysis of the nonlinear oscillator that describe the polygonal structures at the jump interface, in addition to a perturbation method that enables to explain, for instance, the diversity of patterns found in experiments. GRASP, Institute of Physics, University of Liege, Belgium.

  3. Aerodynamic Jump for Long Rod Penetrators

    Directory of Open Access Journals (Sweden)

    Mark L. Bundy

    2000-04-01

    Full Text Available Aerodynamic jump for a non-spinning kinetic energy penetrator is neither a discontinuous change in the ,direction of motion at the origin of free night, nor is it the converse, i.e. a cumulativer~direc4on over a domain of infinite extent. Rather aerodynamic jump, for such a projectile, is a localised redirection of the centre of gravity motion, caused ~ the force of lift due to yaw over ther4latively short region from entry into free flight until the yaw reaches its first maximum. The primary objective of this paper is to provide answtfrs to the questions like what is aerodynamic jump, what liauses it, !lnd wh~t aspects df the flight trajectory does it refer to, or account for .

  4. Theoretical analysis on force transmissibility and jump phenomena of Duffing spring type vibration isolator%Duffing型隔振的力传递率及跳跃现象的理论分析

    Institute of Scientific and Technical Information of China (English)

    张小龙; 东亚斌

    2012-01-01

    针对隔振器中普遍存在的非线性特性,以立方非线性恢复力作用的单自由度隔振系统为例,用谐波平衡法求解非线性隔振系统固有频率附近的主共振响应,根据Routh-Hurwitz稳定性判定定理,从理论上说明主共振响应的幅频特性曲线族上垂直切线点的轨迹曲线所包围的区域为不稳定区域.推导出了隔振系统跳跃频率和力传递率的计算公式.计算表明隔振系统力传递率出现跳跃、滞后、以及稳定和不稳定现象,且隔振传递力中的高频谐波分量的影响很小.隔振系统的阻尼、非线性恢复力系数和激励幅值对共振区域的力传递率有影响,对频率低于共振频率区域的力传递率没有影响,其中仅阻尼对频率高于共振频率区域的力传递率有影响.还给出了力传递率小于1的起始频率计算公式.%In order to study the common nonlinear characteristics of the vibration isolator, a single degree of freedom system with cubic restoring force was introduced and the harmonic balance method was applied to investigate the primary resonance near the natural frequency of the system. Based on Routh-Hurwitz stability criterion, it was clarified theoretically that the region surrounded by the curve consisting of the vertical tangential points on the cluster of primary resonance amplitude frequency characteristics curves is instable. In addition, the equations for the jump frequency and force transmissibility were derived. The calculated results show that the jump, hysteresis, stable and instable phenomena would take place for the force transmissibility of the isolator system and the effect of high frequency components of the transmitted force is limited. The damping of the system, the coefficient of nonlinear restoring force and the excitation amplitude have influence on the force transmissibility only in the region of resonant frequencies, but no effect in the frequence range lower than the resonance

  5. American College of Rheumatology classification criteria for Sjögren's syndrome

    DEFF Research Database (Denmark)

    Shiboski, S C; Shiboski, C H; Criswell, L A

    2012-01-01

    We propose new classification criteria for Sjögren's syndrome (SS), which are needed considering the emergence of biologic agents as potential treatments and their associated comorbidity. These criteria target individuals with signs/symptoms suggestive of SS....

  6. Neurologic manifestations in primary Sjögren syndrome: a study of 82 patients

    National Research Council Canada - National Science Library

    Delalande, Sophie; de Seze, Jérôme; Fauchais, Anne-Laure; Hachulla, Eric; Stojkovic, Tanya; Ferriby, Didier; Dubucquoi, Sylvain; Pruvo, Jean-Pierre; Vermersch, Patrick; Hatron, Pierre-Yves

    2004-01-01

    Neurologic involvement occurs in approximately 20% of patients with primary Sjögren syndrome (SS). However, the diagnosis of SS with neurologic involvement is sometimes difficult, and central nervous system...

  7. Planarity of 3,4-jump Graphs

    Institute of Scientific and Technical Information of China (English)

    魏二玲; 刘颜佩

    2004-01-01

    For a graph G of size ε≥1 and its edge-induced subgraphs H1 and H2 of size γ(1 < γ < ε), H1 is said to be obtained from H2 by an edge jump if there exist four distinct vertices u, v, ω and x in G such that (u,v)∈E(H2), (ω,x)∈E(G) - E(H2) and H1=H2 - (u, v) + (ω, x). In this article, the γ-jump graphs(r≥3) are discussed. A graph H is said to be an γ-jump graph of G if its vertices correspond to the edge induced graph of size γ in G and two vertices are adjacent if and only if one of the two corresponding subgraphs can be obtained from the other by an edge jump. For k≥2, the k-th iterated γ-jump graph Jrk(G) is defined as Jγ(Jγk-1 (G)), where Jγ1 (G) = Jγ(G). An infinite sequence {Gi} of graphs is planar if every graph Gi is planar. It is shown that there does not exist a graph G for which the sequence {J3k(G)} is planar, where k is any positive integer. Meanwhile, lim gen(J3k(G)) =∞, where gen(G) denotes the genus of a graph G, if the sequence k→∞J3k(G) is defined for every positive integer k. As for the 4-jump graph of a graph G,{J4k(G)} is planar if and only if G = C5. For γ≥5, whether the fix graph of the sequence {Jγk(G))exists is determined.

  8. European option pricing under the Student's t noise with jumps

    Science.gov (United States)

    Wang, Xiao-Tian; Li, Zhe; Zhuang, Le

    2017-03-01

    In this paper we present a new approach to price European options under the Student's t noise with jumps. Through the conditional delta hedging strategy and the minimal mean-square-error hedging, a closed-form solution of the European option value is obtained under the incomplete information case. In particular, we propose a Value-at-Risk-type procedure to estimate the volatility parameter σ such that the pricing error is in accord with the risk preferences of investors. In addition, the numerical results of us show that options are not priced in some cases in an incomplete information market.

  9. Spectral Analysis of Diffusions with Jump Boundary

    CERN Document Server

    Kolb, Martin

    2011-01-01

    In this paper we consider one-dimensional diffusions with constant coefficients in a finite interval with jump boundary and a certain deterministic jump distribution. We use coupling methods in order to identify the spectral gap in the case of a large drift and prove that that there is a threshold drift above which the bottom of the spectrum no longer depends on the drift. As a Corollary to our result we are able to answer two questions concerning elliptic eigenvalue problems with non-local boundary conditions formulated previously by Iddo Ben-Ari and Ross Pinsky.

  10. Aerodynamic Jump for Long Rod Penetrators

    OpenAIRE

    Mark L. Bundy

    2000-01-01

    Aerodynamic jump for a non-spinning kinetic energy penetrator is neither a discontinuous change in the ,direction of motion at the origin of free night, nor is it the converse, i.e. a cumulativer~direc4on over a domain of infinite extent. Rather aerodynamic jump, for such a projectile, is a localised redirection of the centre of gravity motion, caused ~ the force of lift due to yaw over ther4latively short region from entry into free flight until the yaw reaches its first maximum. The primary...

  11. Crohn's Disease Associated with Sweet's Syndrome and Sjögren's Syndrome Treated with Infliximab

    Directory of Open Access Journals (Sweden)

    Erina N. Foster

    2005-01-01

    Full Text Available The association of Crohn's disease (CD and Sweet's syndrome is rare and the presence of Sjögren's syndrome in Crohn's disease is even rarer, with only three reports found in the literature. We describe two cases of Crohn's disease associated with Sweet's syndrome, one of which is the first case of CD and Sweet's concomitantly associated with Sjögren's syndrome. Both cases responded rapidly to Infliximab therapy with complete resolution of the skin lesions.

  12. Sjögren’s syndrome associated with systemic lupus erythematosus

    OpenAIRE

    Taşdemir, Mehmet; Hasan, Chiar; Ağbaş, Ayşe; Kasapçopur, Özgür; Canpolat, Nur; Sever, Lale; Çalışkan, Salim

    2016-01-01

    Systemic lupus erythematosus and Sjögren’s syndrome are chronic auto- inflammatory disorders which can lead to serious organ damage. Although systemic lupus erythematosus and Sjögren’s syndrome were previously considered two forms of the same disease because of presence of clinical coexistence of these two conditions, the view that they are two different conditions with mutual characteristics has become prominent in recent years. In this paper, we reported a 16 year-old girl who was followed ...

  13. Efecto agudo de la técnica Active Isolated Stretching y del reposo sobre la capacidad de salto. [Acute effect of Active Isolated Stretching technique and of rest on the jumping capacity].

    Directory of Open Access Journals (Sweden)

    Jesús López-Bedoya

    2015-07-01

    Full Text Available El objetivo de este estudio fue analizar el efecto agudo de la técnica de estiramiento active isolated stretching (AIS y el efecto del reposo en sedestación sobre la altura de salto registrada mediante el test Squat Jump (SJ y Counter Movement Jump (CMJ. Un total de 22 varones con un rango de edad entre 21 y 24 años (edad 22,9 ± 2,03 años; masa corporal 69,7 ± 5,60 kg; altura 173,6 ± 7,37cm completaron el estudio. Se utilizó un diseño intragrupo pretest-postest con dos situaciones experimentales (estiramiento y reposo en sedestación. A los sujetos del grupo de estiramiento se les evaluó la altura de salto en SJ y CMJ antes e inmediatamente después de aplicar el AIS (15 s después en el cuádriceps femoral y tríceps sural en una única sesión de entrenamiento. Se realizaron 4 series de 12 repeticiones alternando la extremidad inferior izquierda y derecha con el siguiente orden: tríceps sural derecho, tríceps sural izquierdo, cuádriceps femoral derecho y cuádriceps femoral izquierdo. El tiempo de estiramiento total de cada grupo muscular fue de 96 s, con un tiempo total de trabajo de aproximadamente 15 min. A los sujetos del grupo de reposo se les evaluó la altura de salto en SJ y CMJ antes e inmediatamente después de un reposo en sedestación de 15 min. Tras la aplicación de AIS, los resultados mostraron pérdidas agudas de altura de salto de 2,14 cm (-7,13% en SJ y de 2,65 cm (-7,22% en CMJ. Después del reposo, las pérdidas producidas en la altura registrada fueron de 1,90 cm (-6,41% en SJ y de 2,38 cm (-6,46% en CMJ. Por tanto, la utilización de un protocolo de estiramientos utilizando la técnica del AIS o de un periodo de reposo en sedestación influye de forma negativa en la capacidad de salto. Abstract The aim of this study was to analyze the acute effect of stretching technique Active Isolated Stretching (AIS and repose sitting with the lower extremities raised of rest over on the high jump in Squat Jump (SJ and

  14. On the Boundary between Nonlinear Jump Phenomenon and Linear Response of Hypoid Gear Dynamics

    Directory of Open Access Journals (Sweden)

    Jun Wang

    2011-01-01

    Full Text Available A nonlinear time-varying (NLTV dynamic model of a hypoid gear pair system with time-dependent mesh point, line-of-action vector, mesh stiffness, mesh damping, and backlash nonlinearity is formulated to analyze the transitional phase between nonlinear jump phenomenon and linear response. It is found that the classical jump discontinuity will occur if the dynamic mesh force exceeds the mean value of tooth mesh force. On the other hand, the propensity for the gear response to jump disappears when the dynamic mesh force is lower than the mean mesh force. Furthermore, the dynamic analysis is able to distinguish the specific tooth impact types from analyzing the behaviors of the dynamic mesh force. The proposed theory is general and also applicable to high-speed spur, helical and spiral bevel gears even though those types of gears are not the primary focus of this paper.

  15. An embryonic myosin isoform enables stretch activation and cyclical power in Drosophila jump muscle.

    Science.gov (United States)

    Zhao, Cuiping; Swank, Douglas M

    2013-06-18

    The mechanism behind stretch activation (SA), a mechanical property that increases muscle force and oscillatory power generation, is not known. We used Drosophila transgenic techniques and our new muscle preparation, the jump muscle, to determine if myosin heavy chain isoforms influence the magnitude and rate of SA force generation. We found that Drosophila jump muscles show very low SA force and cannot produce positive power under oscillatory conditions at pCa 5.0. However, we transformed the jump muscle to be moderately stretch-activatable by replacing its myosin isoform with an embryonic isoform (EMB). Expressing EMB, jump muscle SA force increased by 163% and it generated net positive power. The rate of SA force development decreased by 58% with EMB expression. Power generation is Pi dependent as >4 mM Pi was required for positive power from EMB. Pi increased EMB SA force, but not wild-type SA force. Our data suggest that when muscle expressing EMB is stretched, EMB is more easily driven backward to a weakly bound state than wild-type jump muscle. This increases the number of myosin heads available to rapidly bind to actin and contribute to SA force generation. We conclude that myosin heavy chain isoforms influence both SA kinetics and SA force, which can determine if a muscle is capable of generating oscillatory power at a fixed calcium concentration. Copyright © 2013 Biophysical Society. Published by Elsevier Inc. All rights reserved.

  16. Scheduling of Automated Guided Vehicle and Flexible Jobshop using Jumping Genes Genetic Algorithm

    Directory of Open Access Journals (Sweden)

    P. Paul Pandian

    2012-01-01

    Full Text Available Problem statement: Now a day’s many researchers try Genetic algorithm based optimization to find near optimal solution for flexible job shop. It is a global search. In Our study in the GA, some changes are made to search locally and globally by adding jumping genes operation. A typical flexible job shop model is considered for this research study. For that layout, five different example problems are formulated for purpose of evaluation. The material flow time for different shop types, processing times of products, waiting times of products, sequences of products are created and given in tabular form. Approach: The one of best evolutionary approach i.e., genetic algorithm with jumping genes operation is applied in this study, to optimize AGV flow time and the performance measures of Flexible Job shop manufacturing system. The non dominated sorting approach is used. Genetic algorithm with jumping genes operator is used to evaluate the method. Results: The AGV flow sequence is found out. Using this flow sequence make span, flow time of products with AGV, completion of the products is minimized. The position of the shop types are calculated for all products. The effectiveness of the proposed method is proved by comparing with Hamed Fazlollahtabar method. Conclusion: It is found that jumping genes genetic algorithm delivered good solutions as like as other evolutionary algorithms. Jumping genes genetic algorithm may applied to Multi objective optimization techniques in future.

  17. Analysis of muscle activity in various performance levels of Ollie jumps in skateboarding: A pilot study

    Directory of Open Access Journals (Sweden)

    Michal Vorlíček

    2015-03-01

    Full Text Available Background: Correct mastering of a basic Ollie jump is essential for development of other jumps in skateboarding. In scientific literature we can find a lack of scientifically proved knowledge that describes the difference in muscular activity on various levels of this jump performance. Objective: The aim of this study was to characterize muscular activity in the basic skateboard Ollie jump and to compare this activity with a more difficult modification of the switchstance Ollie jump (the same jump but changed position of limbs. Methods: Ten men experienced in skateboarding for several years, aged 20.0 ± 4.6 years participated in the study (height 1.79 ± 0.05 m, body mass 71.5 ± 4.1 kg. All subjects performed 3 measured Ollie jumps and after that 3 switchstance Ollie jumps. In case of the last-mentioned front and back lower limbs are switched. The observation of muscular activity was carried out by the Delsys Trigno electromyography system. The jump was divided (after video records into four phases: preparatory, take-off, flight-up and landing. Mean amplitude of muscle activity was measured in following muscles: tibialis anterior, gastrocnemius medialis, rectus femoris, semitendinosus and gluteus medius. Comparison of muscle activity during Ollie and switchstance Ollie was performed by the Wilcoxon test in Statistica. Results: Significantly greater activity (p < .05 was shown by gastrocnemius medialis and rectus femoris on the lower back limb during the preparatory phase of switchstance Ollie and by tibialis anterior and semitendinosus on lower front limb during the landing phase of Ollie. Conclusion: Results of our study suggest that in switchstance Ollie is increased muscle activity during preparation period on the back limb and movement control during landing. The skaters in this type of jump should move his/her centre of gravity from the tail to the centre of the skateboard and also he/she would produce adequate muscle

  18. The Effect of Standard Strength vs. Contrast Strength Training on the Development of Sprint, Agility, Repeated Change of Direction, and Jump in Junior Male Soccer Players.

    Science.gov (United States)

    Hammami, Mehréz; Negra, Yassine; Shephard, Roy J; Chelly, Mohamed Souhaiel

    2017-04-01

    Hammami, M, Negra, Y, Shephard, RJ, and Chelly, MS. The effect of standard strength vs. contrast strength training on the development of sprint, agility, repeated change of direction, and jump in junior male soccer players. J Strength Cond Res 31(4): 901-912, 2017-The aim was to compare the impact of 2 differing strength training (ST) programs on the athletic performance of junior male soccer players at a critical phase during their competitive season. Participants aged 16.0 ± 0.5 years were randomly assigned between control (C, n = 12), standard ST (n = 16), and contrast strength training (CST, n = 16), each performed twice a week. Athletic performance was assessed before and after the intervention using 8 tests: 40-m sprint, 4 × 5-m sprint (S4 × 5), 9-3-6-3-9 m sprint with 180° turns (S180°), 9-3-6-3-9 m sprint with backward and forward running (SBF), repeated shuttle sprint ability (RSSA), repeated change of direction (RCOD), squat jump (SJ), and countermovement jump (CMJ). The control group's (CG) performance tended to improve in some tests and decrease in others, but these changes were not statistically significant. Both training programs enhanced all sprint performances relative to controls (p ≤ 0.05). The strength training group (SG) and the CST group (CSG) increased significantly in S180°, SBF, and S4 × 5 relative to CG, although the S4 × 5 also increased in CSG relative to SG (p ≤ 0.05). No intergroup difference of RSSA performance was observed. The RCOD parameters increased significantly in CSG relative to both SG and CG (p ≤ 0.05). The SJ and CMJ height increased significantly in both experimental groups (p < 0.000). We conclude that during the competitive season, some measures of athletic performance in male soccer players were increased more by 8 weeks of CST than by ST.

  19. 日本血吸虫重组质粒pGEX-Sj14-3-3-Sj32的构建及其在大肠埃希菌BL21(DE3)中的表达%Construction and expression of a recombinant plasmid pGEX-Sj14-3-3-Sj32 of Schistosoma japonicum in Escherichia coli BL21(DE3)

    Institute of Scientific and Technical Information of China (English)

    覃婷; 李文桂; 谭建蓉

    2015-01-01

    目的 构建日本血吸虫重组质粒pGEX-Sj14-3-3-Sj32,探讨重组质粒在大肠埃希菌BL21 (DE3)中的表达.方法 以重庆医科大学附属第一医院传染病寄生虫病研究所保存的质粒pGEX-Sj14-3-3和pET28α-Sj32为模板,通过PCR扩增Sj14-3-3和Sj32抗原编码基因,然后采用基因拼接法(gene SOEing)剪接Sj14-3-3和Sj32基因,得到Sj14-3-3-Sj32融合基因,定向克隆入穿梭载体pGEX-1 λT,构建重组质粒pGEX-Sj14-3-3-Sj32,并采用双酶切法进行验证.将重组质粒转化大肠埃希菌BL21 (DE3),经异丙基硫代-β-D-半乳糖苷(IPTG)诱导表达后,用十二烷基磺酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)和蛋白质免疫印迹(Western blot)法对表达产物进行分析鉴定.结果 基因拼接法得到约1 750 bp的Sj14-3-3-Sj32融合基因;双酶切证实Sj14-3-3-Sj32融合基因成功插入pGEX-1λT载体中;SDS-PAGE分析显示,表达产物为相对分子质量约为73×103的重组蛋白;Western blot显示,重组蛋白可被日本血吸虫感染的兔血清识别.结论 成功构建日本血吸虫重组质粒pGEX-Sj 14-3-3-Sj32,该重组质粒在大肠埃希菌BL21(DE3)中得到了高效融合表达,且表达的融合蛋白具有特异的抗原性.%Objective To construct and express a recombinant plasmid pGEX-Sj 14-3-3-Sj32 of Schistosoma japonicum in Escherichia coli (E.Coli) BL21 (DE3).Methods Sj14-3-3 and Sj32 antigen genes were amplified by PCR from template of plasmids pGEX-Sj14-3-3 and pET28α-Sj32 which were extracted from recombinant bacteria BL21 (pET28α-Sj32) and BL21 (pGEX-Sj14-3-3) stored in Institute of Infectious and Parasitic Disease of the First Affiliated Hospital of Chongqing Medical University.Sj14-3-3-Sj32 fusion gene obtained with gene SOEing was cloned into the vector pGEX-1λT to construct pGEX-Sj14-3-3-Sj32 which was identified by double digestion.The recombinant plasmid pGEX-Sj 14-3-3-Sj32 was transformed into E.Coli BL21 (DE3).The recombinant strains were induced by

  20. Recovery Outline: New Mexico Jumping Mouse (Zapus hudsonius luteus)

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The purpose of this recovery outline is to provide an interim strategy to guide the conservation and recovery of the New Mexico meadow jumping mouse (jumping mouse)...

  1. Understanding the Physics of Bungee Jumping

    Science.gov (United States)

    Heck, Andre; Uylings, Peter; Kedzierska, Ewa

    2010-01-01

    Changing mass phenomena like the motion of a falling chain, the behaviour of a falling elastic bar or spring, and the motion of a bungee jumper surprise many a physicist. In this article we discuss the first phase of bungee jumping, when the bungee jumper falls, but the bungee rope is still slack. In instructional material this phase is often…

  2. Jumping Rope at Day of Play

    Science.gov (United States)

    2005-01-01

    Sarah Dastugue, 11, leaps in the air as Libby Knox, 9, swings a jump rope. The children were participants in Nickelodeon's Worldwide Day of Play celebration at Stennis Space Center (SSC) on Oct. 1. On the day of the event, children all over the world participate in physical activities as part of the celebration.

  3. Understanding the physics of bungee jumping

    NARCIS (Netherlands)

    Heck, A.; Uylings, P.; Kędzierska, E.

    2010-01-01

    Changing mass phenomena like the motion of a falling chain, the behaviour of a falling elastic bar or spring, and the motion of a bungee jumper surprise many a physicist. In this article we discuss the first phase of bungee jumping, when the bungee jumper falls, but the bungee rope is still slack.

  4. Jumping on the Social Media Bandwagon

    Science.gov (United States)

    Blakeslee, Lori

    2012-01-01

    Should a school district jump on the social media bandwagon? Yes! Social media provide a low-cost way to communicate school district priorities, influence decision makers, and tell its story without filters. Equally important, social media are where constituents are spending a lot of their time. With more than 800 million members, Facebook is an…

  5. Jumping on the Social Media Bandwagon

    Science.gov (United States)

    Blakeslee, Lori

    2012-01-01

    Should a school district jump on the social media bandwagon? Yes! Social media provide a low-cost way to communicate school district priorities, influence decision makers, and tell its story without filters. Equally important, social media are where constituents are spending a lot of their time. With more than 800 million members, Facebook is an…

  6. Jumping-droplet electrostatic energy harvesting

    Science.gov (United States)

    Miljkovic, Nenad; Preston, Daniel J.; Enright, Ryan; Wang, Evelyn N.

    2014-07-01

    Micro- and nanoscale wetting phenomena have been an active area of research due to its potential for improving engineered system performance involving phase change. With the recent advancements in micro/nanofabrication techniques, structured surfaces can now be designed to allow condensing coalesced droplets to spontaneously jump off the surface due to the conversion of excess surface energy into kinetic energy. In addition to being removed at micrometric length scales (˜10 μm), jumping water droplets also attain a positive electrostatic charge (˜10-100 fC) from the hydrophobic coating/condensate interaction. In this work, we take advantage of this droplet charging to demonstrate jumping-droplet electrostatic energy harvesting. The charged droplets jump between superhydrophobic copper oxide and hydrophilic copper surfaces to create an electrostatic potential and generate power during formation of atmospheric dew. We demonstrated power densities of ˜15 pW/cm2, which, in the near term, can be improved to ˜1 μW/cm2. This work demonstrates a surface engineered platform that promises to be low cost and scalable for atmospheric energy harvesting and electric power generation.

  7. DISCONTINUOUS FLOW OF TURBID DENSITY CURRENTS Ⅱ. INTERNAL HYDRAULIC JUMP

    Institute of Scientific and Technical Information of China (English)

    Jiahua FAN

    2005-01-01

    Traveling and stationary internal hydraulic jumps in density currents with positive or negative entrainment coefficients were analyzed based on simple assumptions. An expression of internal hydraulic jumps with entrainment coefficients was derived. Experimental data, published in literature, of stationary internal hydraulic jumps in turbid, thermal and saline density currents including measured values of water entrainment were used to compare with theory. Comparison was also made of traveling internal hydraulic jumps between measured data and theory.

  8. Humans adjust control to initial squat depth in vertical squat jumping.

    Science.gov (United States)

    Bobbert, Maarten F; Casius, L J Richard; Sijpkens, Igor W T; Jaspers, Richard T

    2008-11-01

    The purpose of this study was to gain insight into the control strategy that humans use in jumping. Eight male gymnasts performed vertical squat jumps from five initial postures that differed in squat depth (P1-P5) while kinematic data, ground reaction forces, and electromyograms (EMGs) of leg muscles were collected; the latter were rectified and smoothed to obtain SREMGs. P3 was the preferred initial posture; in P1, P2, P4, and P5 height of the mass center was +13, +7, -7 and -14 cm, respectively, relative to that in P3. Furthermore, maximum-height jumps from the initial postures observed in the subjects were simulated with a model comprising four body segments and six Hill-type muscles. The only input was the onset of stimulation of each of the muscles (Stim). The subjects were able to perform well-coordinated squat jumps from all postures. Peak SREMG levels did not vary among P1-P5, but SREMG onset of plantarflexors occurred before that of gluteus maximus in P1 and > 90 ms after that in P5 (P < 0.05). In the simulation study, similar systematic shifts occurred in Stim onsets across the optimal control solutions for jumps from P1-P5. Because the adjustments in SREMG onsets to initial posture observed in the subjects were very similar to the adjustments in optimal Stim onsets of the model, it was concluded that the SREMG adjustments were functional, in the sense that they contributed to achieving the greatest jump height possible from each initial posture. For the model, we were able to develop a mapping from initial posture to Stim onsets that generated successful jumps from P1-P5. It appears that to explain how subjects adjust their control to initial posture there is no need to assume that the brain contains an internal dynamics model of the musculoskeletal system.

  9. Humans make near-optimal adjustments of control to initial body configuration in vertical squat jumping.

    Science.gov (United States)

    Bobbert, Maarten F; Richard Casius, L J; Kistemaker, Dinant A

    2013-05-01

    We investigated adjustments of control to initial posture in squat jumping. Eleven male subjects jumped from three initial postures: preferred initial posture (PP), a posture in which the trunk was rotated 18° more backward (BP) and a posture in which it was rotated 15° more forward (FP) than in PP. Kinematics, ground reaction forces and electromyograms (EMG) were collected. EMG was rectified and smoothed to obtain smoothed rectified EMG (srEMG). Subjects showed adjustments in srEMG histories, most conspicuously a shift in srEMG-onset of rectus femoris (REC): from early in BP to late in FP. Jumps from the subjects' initial postures were simulated with a musculoskeletal model comprising four segments and six Hill-type muscles, which had muscle stimulation (STIM) over time as input. STIM of each muscle changed from initial to maximal at STIM-onset, and STIM-onsets were optimized using jump height as criterion. Optimal simulated jumps from BP, PP and FP were similar to jumps of the subjects. Optimal solutions primarily differed in STIM-onset of REC: from early in BP to late in FP. Because the subjects' adjustments in srEMG-onsets were similar to adjustments of the model's optimal STIM-onsets, it was concluded that the former were near-optimal. With the model we also showed that near-maximum jumps from BP, PP and FP could be achieved when STIM-onset of REC depended on initial hip joint angle and STIM-onsets of the other muscles were posture-independent. A control theory that relies on a mapping from initial posture to STIM-onsets seems a parsimonious alternative to theories relying on internal optimal control models. Copyright © 2013 IBRO. Published by Elsevier Ltd. All rights reserved.

  10. Sjögren's syndrome complicated with Fanconi syndrome and Hashimoto's thyroiditis: Case report and literature review.

    Science.gov (United States)

    Shi, Mingmin; Chen, Lei

    2016-06-01

    We report a unique case of Sjögren's syndrome complicated with Fanconi syndrome and Hashimoto's thyroiditis in a 53-year-old Chinese woman, initially found to have proteinuria, fatigue and multiple old costal fractures. Distal tubular dysfunction is the most common renal damage in Sjögren's syndrome, while Fanconi syndrome (which is caused by proximal tubular dysfunction) and Hypothyroidism are rare complications of Sjögren's syndrome.

  11. Sjögren, Wiedemann ja liivi keele sõnaraamat. Panus 19. sajandi teadusajalukku / Eberhard Winkler

    Index Scriptorium Estoniae

    Winkler, Eberhard, 1955-

    2009-01-01

    Uuritakse, milline võis olla kummagi teadlase osa esimese liivi keele sõnaraamatu koostamisel: Sjögren, Andreas Johan. Gesammelte Schriften. Band II. Theil I., Joh. Andreas Sjögren's Livische Grammatik nebst Sprachproben ; Band II. Theil II., Joh. Andreas Sjögren's livisch-deutsches und deutsch-livisches Wörterbuch / bearbeitet von Ferdinand Joh. Wiedemann. St. Petersburg, 1861

  12. Higher frequency of brain abnormalities in neuromyelitis optica spectrum disorder patients without primary Sjögren's syndrome

    OpenAIRE

    2016-01-01

    Neuromyelitis optica spectrum disorder often co-exists with primary Sjögren′s syndrome. We compared the clinical features of 16 neuromyelitis optica spectrum disorder patients with (n = 6) or without primary Sjögren′s syndrome (n = 10). All patients underwent extensive clinical, laboratory, and MRI evaluations. There were no statistical differences in demographics or first neurological involvement at onset between neuromyelitis optica spectrum disorder patients with and without primary Sjögre...

  13. Sjögren, Wiedemann ja liivi keele sõnaraamat. Panus 19. sajandi teadusajalukku / Eberhard Winkler

    Index Scriptorium Estoniae

    Winkler, Eberhard, 1955-

    2009-01-01

    Uuritakse, milline võis olla kummagi teadlase osa esimese liivi keele sõnaraamatu koostamisel: Sjögren, Andreas Johan. Gesammelte Schriften. Band II. Theil I., Joh. Andreas Sjögren's Livische Grammatik nebst Sprachproben ; Band II. Theil II., Joh. Andreas Sjögren's livisch-deutsches und deutsch-livisches Wörterbuch / bearbeitet von Ferdinand Joh. Wiedemann. St. Petersburg, 1861

  14. Option Valuation with Observable Volatility and Jump Dynamics

    DEFF Research Database (Denmark)

    Christoffersen, Peter; Feunou, Bruno; Jeon, Yoontae

    Under very general conditions, the total quadratic variation of a jump-diffusion process can be decomposed into diffusive volatility and squared jump variation. We use this result to develop a new option valuation model in which the underlying asset price exhibits volatility and jump intensity dy...

  15. Determination of jumps for functions via derivative Gabor series

    Institute of Scientific and Technical Information of China (English)

    ZHOU Ying-ying; SHI Xian-liang

    2009-01-01

    Recently, Shi Xianliang and Hu Lan published the method of concentration factors for determination of jumps of functions via MCM conjugate wavelets. Usually, it is difficult to calculate the Hilbert transform of general window functions. The aim of this paper is to discuss determination of jumps for functions based on derivative Gabor series. The results will simplify the calculation of jump values.

  16. Spontaneous intracranial hemorrhage as an initial manifestation of primary Sjögren’s syndrome: a case report

    OpenAIRE

    2013-01-01

    Background Sjögren’s syndrome can involve the central nervous system; however, spontaneous intracranial hemorrhage has rarely been reported as the initial manifestation. Case presentation We report a 39-year-old woman with primary Sjögren’s syndrome presenting with intracranial hemorrhage. The diagnosis of primary Sjögren’s syndrome was based on the presence of ocular dryness, salivary gland secretory and excretory dysfunction confirmed with dynamic tracer emission CT, and positive anti-Sjögr...

  17. Kidney biopsy findings in primary Sjögren syndrome.

    Science.gov (United States)

    Kidder, Dana; Rutherford, Elaine; Kipgen, David; Fleming, Stewart; Geddes, Colin; Stewart, Graham A

    2015-08-01

    Renal involvement is rare in primary Sjögren syndrome (PSS). In this study, we examined renal biopsy findings in patients with PSS and correlated them with their clinical and renal findings. Twenty-five patients with PSS who underwent renal biopsies from two renal units in Scotland between 1978 and 2013 were identified from renal biopsy database. We examined the renal morphologic, clinical and renal findings at the time of renal biopsy, renal and patient outcomes. The diagnosis of PSS preceded renal biopsy in 18/25 patients. In this group, the median duration of the disease was 5.5 years. Significant proteinuria, combined microscopic haematuria and proteinuria and reduced renal excretory function were found in 76, 56 and 84% of patients, respectively. The 3-year actuarial patient survival was significantly lower in patients with glomerulonephritis as compared with tubulointerstitial nephritis (66 versus 100%, P = 0.02). There was no difference in 3-year actuarial renal survival between these two groups (92 versus 92%, P = 1.0). Renal biopsy is rare in PSS and often reveals diverse pathological findings. Glomerulonephritis, as compared with tubulointerstitial nephritis, is associated with higher early mortality. Further studies are needed to evaluate the utility of renal biopsy and its impact on disease management. © The Author 2015. Published by Oxford University Press on behalf of ERA-EDTA. All rights reserved.

  18. Facilitering i de sjællandske lokale energispareudvalg

    DEFF Research Database (Denmark)

    Christensen, Hanne Broen

    2001-01-01

    Formålet med denne rapport er på baggrund af en kortlægning af de sjællandske lokale energispareudvalg samt en SWOT-analyse, en aktøranalyse og en teoretisk diskussion at belyse, hvordan de lokale energispareudvalg ved hjælp af en facilitator kan støttes i deres arbejde med at opfylde målene, der...... er udstukket i loven om fremme af besparelser i energiforbruget. Udvalgenes arbejde består af en etableringsfase og et videre forløb, hvor trategier og handlingsplaner skal udarbejdes. En facilitator skal forstås som en person, der styrker en gruppe i at lære om deres problemsituation, om deres mål...... er på baggrund af SWOT-analysen identificeret seks problemer hos udvalgene. Det er udvalgets manglende identitet, manglende konkrete projektforslag, uenighed om geografiske områder, at deltagerne ikke kender hinandenn, frygt for skæve magtforhold i udvalgene og manglende visioner. Aktøranalysen har...

  19. Predictors of race-day jockey falls in jumps racing in Australia.

    Science.gov (United States)

    Hitchens, P; Blizzard, L; Jones, G; Day, L; Fell, J

    2011-05-01

    Thoroughbred jumps racing jockeys have a fall rate greater than their flat racing counterparts. Previous studies have focused on factors that contribute to falls by horses but, to date, there has not been a study of risk factors for falls to jockeys in jumps races. Data on race-day falls were extracted from stipendiary stewards reports lodged with Principal Racing Authorities following each race meeting. Denominator data were provided by Racing Information Services Australia on races conducted from August 2002 until July 2009. Univariable and multivariable analyses, estimating incidence rate ratios, were conducted using Poisson regression. In multivariable analysis in hurdle racing, important predictors of falls were higher club level, larger field size, greater prize money, provisionally licensed jockeys and older jockeys. There were significant interactions between jockey licence and prize money; jockey age and previous rides this meeting; race grade and race distance; horse age and field size; and club level and field size. In steeplechase racing, important predictors were type of jump with lowest fall rates in races over Mark III jumps compared to standard fences, provisionally licensed jockeys, jockeys having had previous rides at a meeting, and larger field size. There were significant interactions between the number of previous starts by the horse and field size; race distance and prize money; and race distance and previous rides this meeting. This study has identified factors for falls in jumps racing that could form the basis for targeted strategies to improve occupational health and safety standards. Copyright © 2010 Elsevier Ltd. All rights reserved.

  20. Diagnostic Approaches to Sjögren’s Syndrome: a Literature Review and Own Clinical Experience

    Directory of Open Access Journals (Sweden)

    Pedro de Sousa Gomes

    2012-03-01

    Full Text Available Objectives: The purpose of present paper is to critically address the recent advances on diagnostic procedures of Sjögren’s syndrome, taking into account the attained local and systemic features of the disease. Material and Methods: A comprehensive review of the available literature regarding to the diagnostic approaches to Sjögren’s syndrome was conducted. Eligible studies were identified by searching the electronic literature PubMed, Medline, Embase, and ScienceDirect databases for relevant reports (last search update January 2012 combining the MESH heading term “Sjögren’s syndrome”, with the words "diagnosis, diagnostic procedures, salivary gland function, ocular tests, histopathology, salivary gland imaging, serology". The authors checked the references of the selected articles to identify additional eligible publications and contacted the authors, if necessary. Results: Presented article addresses the established diagnostic criteria for Sjögren’s syndrome and critically evaluates the most commonly used diagnostic procedures, presenting data from author’s own clinical experience. Diagnostic criteria for Sjögren’s syndrome are required both by healthcare professionals and patients, namely in order to provide a rational basis for the assessment of the symptoms, establish an individual disease prognosis, and orientate the therapeutic intervention. Conclusions: Sjögren’s syndrome is quite a common autoimmune disease of which the diagnosis and treatment are not easily established. Due to its systemic involvement, it can exhibit a wide range of clinical manifestations that contribute to confusion and delay in diagnosis. The use of proper diagnostic modalities will help to reduce the time to diagnosis and preserve the health and quality of life of patients with Sjögren’s syndrome.

  1. St. John's Wort protein, p27SJ, regulates the MCP-1 promoter.

    Science.gov (United States)

    Mukerjee, Ruma; Deshmane, Satish L; Darbinian, Nune; Czernik, Marta; Khalili, Kamel; Amini, Shohreh; Sawaya, Bassel E

    2008-09-01

    St. John's Wort is commonly known for its antiviral, antidepressant, and cytotoxic properties, but traditionally St. John's Wort has also been used to treat inflammation. In this study, we sought to characterize the mechanisms used by St. John's Wort to treat inflammation by examining the effect of the recently isolated protein from St. John's Wort, p27SJ on the expression of MCP-1. By employing an adenovirus expression vector, we demonstrate that a low concentration of p27SJ upregulates the MCP-1 promoter through the transcription factor C/EBPbeta. In addition, we found that C/EBPbeta-homologous protein (CHOP) or siRNA-C/EBPbeta significantly reduced the ability of p27SJ to activate MCP-1 gene expression. Results from protein-protein interaction studies illustrate the existence of a physical interaction between p27SJ and C/EBPbeta in microglial cells. The use of chromatin immunoprecipitation assay (ChIP) led to the identification of a new cis-element that is responsive to C/EBPbeta within the MCP-1 promoter. Association of C/EBPbeta with MCP-1 DNA was not affected by the presence of p27SJ. The biological activity of MCP-1 produced by cultures of adenovirus-p27SJ transduced cells was increased relative to controls as measured by the transmigration of human Jurkat cells. Thus, we conclude that at high concentration, p27SJ is a potential agent that may be developed as a modulator of MCP-1 leading to the inhibition of the cytokine-mediated inflammatory responses.

  2. [INFLUENCE OF BODY COMPOSITION ON VERTICAL JUMP PERFORMANCE ACCORDING WITH THE AGE AND THE PLAYING POSITION IN FOOTBALL PLAYERS].

    Science.gov (United States)

    Chena Sinovas, Marcos; Pérez-López, Alberto; Álvarez Valverde, Irene; Bores Cerezal, Antonio; Ramos-Campo, Domingo Jesús; Rubio-Arias, Jacobo Ángel; Valadés Cerrato, David

    2015-07-01

    Introducción: la detección de jóvenes talentos en fútbol tiene un carácter multifactorial. Entre estos factores, la composición corporal y el salto vertical han mostrado su utilidad tanto en la detección de talentos como en el control del rendimiento y la recuperación de lesiones. Por ello, el objetivo de este estudio fue describir el perfil antropométrico y el rendimiento de salto en futbolistas de todas las categorías de formación en base a su demarcación en el terreno de juego. Métodos: participaron en el estudio cuatrocientos treinta y cuatro jóvenes futbolistas españoles de 7 a 25 años de edad (13,4 ± 3,45 años; 156 ± 17 cm; 47,9 ± 15,4 kg), con un mínimo de tres sesiones semanales de 1,5 horas por sesión. Todos ellos fueron clasificados en función de la edad o la categoría (U9, U11, U13, U15, U17 y U25) y la demarcación en el terreno de juego (porteros, defensas, centrocampistas y delanteros). Se evaluó la composición corporal por medio del método antropométrico y se registró la altura del salto del Squat Jump (SJ), del Counter Movement Jump (CMJ) y del Abalakov Jump (CMJA). Resultados: se encontraron diferencias significativas en las variables antropométrica y de salto vertical en base a la demarcación para las categorías U13, U15 y U25. Los porteros de la categoría U13 mostraron una mayor masa magra, tejido apendicular, área muscular del muslo y del brazo que el resto de las demarcaciones (P rendimiento de salto que el resto de demarcaciones para el CMJA, que los centrocampistas y delanteros para el CMJ y que los centrocampistas para el SJ (P < 0,05). Conclusión: la utilización del salto vertical y el perfil antropométrico como factores en la detección de jóvenes talentos en fútbol debería tener en cuenta no solo la edad biológica y el desarrollo muscular de los sujetos, sino también la demarcación en el terreno de juego.

  3. [Lymphomas of the ocular adnexa in Gougerot-Sjögren syndrome. Apropos of 4 cases].

    Science.gov (United States)

    Chazerain, P; Meyer, O; Kaplan, G; Brissaud, P; Delmer, A; Zufferey, P; Kahn, M F

    1995-01-01

    The risk of malignant B cell lymphoma is increased in Sjögren's syndrome (SS). Orbital localization seems infrequent. We report 4 cases of malignant lymphoma (ML) occurring in 4 women aged 47 to 77 years, with primary SS in 3 cases, located to the conjunctiva in 2 cases, the lacrymal gland in 1 case and the eyelid in 1 case. The interval between the diagnosis of SS and orbital ML varied from 6 months to 15 years. All 4 lymphomas were of the B cell type, low histopathologic grade, with monoclonal gammopathy in 1 case. Extraocular lymphoma was initially present in 1 case. ML remained localized in 2 cases with a follow-up of 4 and 6 years. Two patients treated by excisional biopsy alone are in complete remission 3 and 6 years later. The 2 other patients treated with orbital radiotherapy and chemotherapy died rapidly (transformation into a high grade malignancy in 1 case). We conclude that clinical, immunopathologic features, as well as prognosis and treatment of ocular adnexa ML in SS are similar to those of primary ML without SS.

  4. Lift-off dynamics in a simple jumping robot

    CERN Document Server

    Aguilar, Jeffrey; Wiesenfeld, Kurt; Goldman, Daniel I

    2012-01-01

    We study vertical jumping in a simple robot comprising an actuated mass-spring arrangement. The actuator frequency and phase are systematically varied to find optimal performance. Optimal jumps occur above and below (but not at) the robot's resonant frequency $f_0$. Two distinct jumping modes emerge: a simple jump which is optimal above $f_0$ is achievable with a squat maneuver, and a peculiar stutter jump which is optimal below $f_0$ is generated with a counter-movement. A simple dynamical model reveals how optimal lift-off results from non-resonant transient dynamics.

  5. Dynamics of Coalescence-Induced Jumping Water Droplets

    CERN Document Server

    Miljkovic, Nenad; Enright, Ryan; Wang, Evelyn N

    2013-01-01

    This fluid dynamics video shows the different interaction mechanisms of coalescence-induced droplet jumping during condensation on a nanostructured superhydrophobic surface. High speed imaging was used to show jumping behavior on superhydrophobic copper oxide and carbon nanotube surfaces. Videos demonstrating multi-jumping droplets, jumping droplet return to the surface, and droplet-droplet electrostatic repulsions were analyzed. Experiments using external electric fields in conjunction with high speed imaging in a custom built experimental chamber were used to show that all coalescence-induced jumping droplets on superhydrophobic surfaces become positively charged upon leaving the surface, which is detailed in the video.

  6. Efecto agudo de la técnica Active Isolated Stretching y del reposo sobre la capacidad de salto. [Acute effect of Active Isolated Stretching technique and of rest on the jumping capacity].

    OpenAIRE

    Jesús López-Bedoya; Leopoldo Ariza-Vargas; Alejandro Robles-Fuentes; Mercedes Vernetta-Santana

    2015-01-01

    El objetivo de este estudio fue analizar el efecto agudo de la técnica de estiramiento active isolated stretching (AIS) y el efecto del reposo en sedestación sobre la altura de salto registrada mediante el test Squat Jump (SJ) y Counter Movement Jump (CMJ). Un total de 22 varones con un rango de edad entre 21 y 24 años (edad 22,9 ± 2,03 años; masa corporal 69,7 ± 5,60 kg; altura 173,6 ± 7,37cm) completaron el estudio. Se utilizó un diseño intragrupo pretest-postest con dos situaciones experi...

  7. Effect of early training on the jumping technique of horses.

    Science.gov (United States)

    Santamaría, Susana; Bobbert, Maarten F; Back, Willem; Barneveld, Ab; van Weeren, P Rene

    2005-03-01

    To investigate the effects of early training for jumping by comparing the jumping technique of horses that had received early training with that of horses raised conventionally. 40 Dutch Warmblood horses. The horses were analyzed kinematically during free jumping at 6 months of age. Subsequently, they were allocated into a control group that was raised conventionally and an experimental group that received 30 months of early training starting at 6 months of age. At 4 years of age, after a period of rest in pasture and a short period of training with a rider, both groups were analyzed kinematically during free jumping. Subsequently, both groups started a 1-year intensive training for jumping, and at 5 years of age, they were again analyzed kinematically during free jumping. In addition, the horses competed in a puissance competition to test maximal performance. Whereas there were no differences in jumping technique between experimental and control horses at 6 months of age, at 4 years, the experimental horses jumped in a more effective manner than the control horses; they raised their center of gravity less yet cleared more fences successfully than the control horses. However, at 5 years of age, these differences were not detected. Furthermore, the experimental horses did not perform better than the control horses in the puissance competition. Specific training for jumping of horses at an early age is unnecessary because the effects on jumping technique and jumping capacity are not permanent.

  8. Scaled Jump in Gravity-Reduced Virtual Environments.

    Science.gov (United States)

    Kim, MyoungGon; Cho, Sunglk; Tran, Tanh Quang; Kim, Seong-Pil; Kwon, Ohung; Han, JungHyun

    2017-04-01

    The reduced gravity experienced in lunar or Martian surfaces can be simulated on the earth using a cable-driven system, where the cable lifts a person to reduce his or her weight. This paper presents a novel cable-driven system designed for the purpose. It is integrated with a head-mounted display and a motion capture system. Focusing on jump motion within the system, this paper proposes to scale the jump and reports the experiments made for quantifying the extent to which a jump can be scaled without the discrepancy between physical and virtual jumps being noticed by the user. With the tolerable range of scaling computed from these experiments, an application named retargeted jump is developed, where a user can jump up onto virtual objects while physically jumping in the real-world flat floor. The core techniques presented in this paper can be extended to develop extreme-sport simulators such as parasailing and skydiving.

  9. Salivary transforming growth factor alpha in patients with Sjögren's syndrome and reflux laryngitis

    Directory of Open Access Journals (Sweden)

    Marco Antonio dos Anjos Corvo

    2014-12-01

    Full Text Available Introduction: Saliva plays a key role in the homeostasis of the digestive tract, through its inorganic components and its protein growth factors. Sjögren's syndrome patients have a higher prevalence of gastroesophageal reflux disease and laryngopharyngeal reflux. Decreased salivary transforming growth factor alpha levels were observed in dyspeptic patients, but there have been no studies in patients with Sjögren's syndrome and laryngopharyngeal reflux. Objective: To compare the salivary transforming growth factor alpha levels of patients with Sjögren's syndrome and laryngopharyngeal reflux to those of healthy controls. Methods: This is a prospective controlled study. Twelve patients with Sjögren's syndrome and laryngopharyngeal reflux and 11 controls were prospectively evaluated. Spontaneous and stimulated saliva samples were obtained to establish salivary transforming growth factor alpha concentrations. Results: The salivary transforming growth factor alpha levels of patients were significantly higher than those of healthy controls. Five patients with laryngopharyngeal reflux also had erosive esophagitis; their salivary transforming growth factor alpha levels were comparable to controls. Conclusion: Salivary transforming growth factor alpha level was significantly higher in patients with Sjögren's syndrome and laryngopharyngeal reflux when compared to the control group.

  10. Oral mucosal manifestations in primary and secondary Sjögren syndrome and dry mouth syndrome

    Directory of Open Access Journals (Sweden)

    Katarzyna Błochowiak

    2016-02-01

    Full Text Available Introduction : One of the most important symptoms of Sjögren syndrome is xerostomia. The oral cavity deprived of saliva and its natural lubricative, protective and antibacterial properties is prone to a number of unfavourable consequences. Aim : To present the most important lesions on the oral mucosa in primary and secondary Sjögren syndrome and in dry mouth syndrome. Material and methods: The study group comprised 55 patients including 52 women and 3 men aged 20–72 years (average: 28.25 years. Results : Basing on the accepted criteria, primary Sjögren syndrome was diagnosed in 22 (40% patients, secondary Sjögren syndrome in 18 (32.7% patients, and dry mouth syndrome in 15 (27.27% patients. The physical examination and the examination of the mouth were performed and history was elicited from every patient. Conclusions : The most common pathologies appearing on the oral mucosa in primary and secondary Sjögren syndrome are angular cheilitis, cheilitis, increased lip dryness as well as non-specific ulcerations, aphthae and aphthoid conditions.

  11. Oral mucosal manifestations in primary and secondary Sjögren syndrome and dry mouth syndrome

    Science.gov (United States)

    Olewicz-Gawlik, Anna; Polańska, Adriana; Nowak-Gabryel, Michalina; Kocięcki, Jarosław; Witmanowski, Henryk; Sokalski, Jerzy

    2016-01-01

    Introduction One of the most important symptoms of Sjögren syndrome is xerostomia. The oral cavity deprived of saliva and its natural lubricative, protective and antibacterial properties is prone to a number of unfavourable consequences. Aim To present the most important lesions on the oral mucosa in primary and secondary Sjögren syndrome and in dry mouth syndrome. Material and methods The study group comprised 55 patients including 52 women and 3 men aged 20–72 years (average: 28.25 years). Results Basing on the accepted criteria, primary Sjögren syndrome was diagnosed in 22 (40%) patients, secondary Sjögren syndrome in 18 (32.7%) patients, and dry mouth syndrome in 15 (27.27%) patients. The physical examination and the examination of the mouth were performed and history was elicited from every patient. Conclusions The most common pathologies appearing on the oral mucosa in primary and secondary Sjögren syndrome are angular cheilitis, cheilitis, increased lip dryness as well as non-specific ulcerations, aphthae and aphthoid conditions. PMID:26985175

  12. Posttranslational Protein Modification in the Salivary Glands of Sjögren’s Syndrome Patients

    Directory of Open Access Journals (Sweden)

    Rafael Herrera-Esparza

    2013-01-01

    Full Text Available The present study investigated posttranslational reactions in the salivary glands of patients with Sjögren’s syndrome. We analysed the biopsies of primary Sjögren’s patients using immunohistochemistry and a tag-purified anticyclic citrullinated protein (CCP antibody to detect citrullinated peptides, and the presence of peptidylarginine deiminase 2 (PAD2 was assessed simultaneously. The present work demonstrated the weak presence of the PAD2 enzyme in some normal salivary glands, although PAD2 expression was increased considerably in Sjögren’s patients. The presence of citrullinated proteins was also detected in the salivary tissues of Sjögren’s patients, which strongly supports the in situ posttranslational modification of proteins in this setting. Furthermore, the mutual expression of CCP and PAD2 suggests that this posttranslational modification is enzyme dependent. In conclusion, patients with Sjögren’s syndrome expressed the catalytic machinery to produce posttranslational reactions that may result in autoantigen triggering.

  13. Capture of Trojans by Jumping Jupiter

    CERN Document Server

    Nesvorny, David; Morbidelli, Alessandro

    2013-01-01

    Jupiter Trojans are thought to be survivors of a much larger population of planetesimals that existed in the planetary region when planets formed. They can provide important constraints on the mass and properties of the planetesimal disk, and its dispersal during planet migration. Here we tested a possibility that the Trojans were captured during the early dynamical instability among the outer planets (aka the Nice model), when the semimajor axis of Jupiter was changing as a result of scattering encounters with an ice giant. The capture occurs in this model when Jupiter's orbit and its Lagrange points become radially displaced in a scattering event and fall into a region populated by planetesimals (that previously evolved from their natal transplanetary disk to ~5 AU during the instability). Our numerical simulations of the new capture model, hereafter jump capture, satisfactorily reproduce the orbital distribution of the Trojans and their total mass. The jump capture is potentially capable of explaining the ...

  14. Sex Differences in Countermovement Jump Phase Characteristics

    Directory of Open Access Journals (Sweden)

    John J. McMahon

    2017-01-01

    Full Text Available The countermovement jump (CMJ is commonly used to explore sex differences in neuromuscular function, but previous studies have only reported gross CMJ measures or have partly examined CMJ phase characteristics. The purpose of this study was to explore differences in CMJ phase characteristics between male and female athletes by comparing the force-, power-, velocity-, and displacement-time curves throughout the entire CMJ, in addition to gross measures. Fourteen men and fourteen women performed three CMJs on a force platform from which a range of kinetic and kinematic variables were calculated via forward dynamics. Jump height (JH, reactive strength index modified, relative peak concentric power, and eccentric and concentric displacement, velocity, and relative impulse were all greater for men (g = 0.58–1.79. Relative force-time curves were similar between sexes, but relative power-, velocity-, and displacement-time curves were greater for men at 90%–95% (immediately before and after peak power, 47%–54% (start of eccentric phase and 85%–100% (latter half of concentric phase, and 65%–87% (bottom of countermovement and initial concentric phase of normalized jump time, respectively. The CMJ distinguished between sexes, with men demonstrating greater JH through applying a larger concentric impulse and, thus, achieving greater velocity throughout most of the concentric phase, including take-off.

  15. Quantum jumps of a fluxonium qubit

    Science.gov (United States)

    Vool, U.; Pop, I. M.; Sliwa, K.; Abdo, B.; Brecht, T.; Shankar, S.; Hatridge, M.; Schoelkopf, R. J.; Mirrahimi, M.; Glazman, L.; Devoret, M. H.

    2014-03-01

    The fluxonium qubit has recently been shown to have energy relaxation time (T1) of the order of 1 ms, limited by quasiparticle dissipation. With the addition of a Josephson Parametric Converter (JPC) to the experiment, trajectories corresponding to quantum jumps between the ground and 1st excited state can be measured, thus allowing the observation of the qubit decay in real time instead of that of an ensemble average. Our measurement fidelity with the JPC is in excess of 98% for an acquisition time of 5 us and we can thus continuously monitor the quantum jumps of the qubit in equilibrium with its environment in a time much shorter than its average relaxation time. We observe in our sample a jump statistics that varies from being completely Poissonian with a long (500 us) mean time in the ground state to being highly non-Poissonian with short (100 us) mean time in the ground state. The changes between these regimes occur on time scales of seconds, minutes and even hours. We have studied this effect and its relation to quasiparticle dynamics by injecting quasiparticles with a short intense microwave pulse and by seeding quasiparticle-trapping vortices with magnetic field. Work supported by: IARPA, ARO, and NSF.

  16. POTENTIAL FOR NON-CONTACT ACL INJURY BETWEEN STEP-CLOSE-JUMP AND HOP-JUMP TASKS

    Directory of Open Access Journals (Sweden)

    Li-I Wang

    2010-03-01

    Full Text Available This study aimed to compare the kinematics and kinetics during the landing of hop-jump and step-close-jump movements in order to provide further inferring that the potential risk of ACL injuries. Eleven elite male volleyball players were recruited to perform hop-jump and step-close-jump tasks. Lower extremity kinematics and ground reaction forces during landing in stop-jump tasks were recorded. Lower extremity kinetics was calculated by using an inverse dynamic process. Step-close-jump tasks demonstrated smaller peak proximal tibia anterior shear forces during the landing phase. In step-close-jump tasks, increasing hip joint angular velocity during initial foot-ground contact decreased peak posterior ground reaction force during the landing phase, which theoretically could reduce the risk of ACL injury

  17. An Efficient Interpolation Technique for Jump Proposals in Reversible-Jump Markov Chain Monte Carlo Calculations

    CERN Document Server

    Farr, Will M

    2011-01-01

    Selection among alternative theoretical models given an observed data set is an important challenge in many areas of physics and astronomy. Reversible-jump Markov chain Monte Carlo (RJMCMC) is an extremely powerful technique for performing Bayesian model selection, but it suffers from a fundamental difficulty: it requires jumps between model parameter spaces, but cannot retain a memory of the favored locations in more than one parameter space at a time. Thus, a naive jump between parameter spaces is unlikely to be accepted in the MCMC algorithm and convergence is correspondingly slow. Here we demonstrate an interpolation technique that uses samples from single-model MCMCs to propose inter-model jumps from an approximation to the single-model posterior of the target parameter space. The interpolation technique, based on a kD-tree data structure, is adaptive and efficient in arbitrary dimensions. We show that our technique leads to dramatically improved convergence over naive jumps in an RJMCMC, and compare it ...

  18. An efficient interpolation technique for jump proposals in reversible-jump Markov chain Monte Carlo calculations.

    Science.gov (United States)

    Farr, W M; Mandel, I; Stevens, D

    2015-06-01

    Selection among alternative theoretical models given an observed dataset is an important challenge in many areas of physics and astronomy. Reversible-jump Markov chain Monte Carlo (RJMCMC) is an extremely powerful technique for performing Bayesian model selection, but it suffers from a fundamental difficulty and it requires jumps between model parameter spaces, but cannot efficiently explore both parameter spaces at once. Thus, a naive jump between parameter spaces is unlikely to be accepted in the Markov chain Monte Carlo (MCMC) algorithm and convergence is correspondingly slow. Here, we demonstrate an interpolation technique that uses samples from single-model MCMCs to propose intermodel jumps from an approximation to the single-model posterior of the target parameter space. The interpolation technique, based on a kD-tree data structure, is adaptive and efficient in modest dimensionality. We show that our technique leads to improved convergence over naive jumps in an RJMCMC, and compare it to other proposals in the literature to improve the convergence of RJMCMCs. We also demonstrate the use of the same interpolation technique as a way to construct efficient 'global' proposal distributions for single-model MCMCs without prior knowledge of the structure of the posterior distribution, and discuss improvements that permit the method to be used in higher dimensional spaces efficiently.

  19. Primary biliary cirrhosis complicated by transverse myelitis in a patient without Sjögren's syndrome

    Directory of Open Access Journals (Sweden)

    Micheli A

    2005-01-01

    Full Text Available Transverse myelitis is an acute inflammatory process, affecting one or more segments of the spinal cord. Its association with primary biliary cirrhosis has been documented in only four cases - all along with Sjögren's syndrome. Herein, we report for the first time, a patient who developed recurrent acute transverse myelitis in association with primary biliary cirrhosis without any clinical or histological indication of Sjögren's syndrome. A 42-year-old woman with primary biliary cirrhosis developed acute onset quadriparesis and urinary retention. Diagnostic evaluation excluded the presence of Sjögren's syndrome, other autoimmune syndromes, infections and multiple sclerosis. Magnetic resonance imaging of the spinal cord disclosed signal intensity abnormalities from C1 to T2 after gadolinium enhancement. As diagnosis of acute transverse myelitis was prominent, the patient was treated with intravenous methylprednisolone. The patient had a fair outcome despite an early recurrence of the symptoms after treatment withdrawal.

  20. Neuromyelitis optica spectrum disorders as initial presentation of Sjögren's syndrome: A case report

    Directory of Open Access Journals (Sweden)

    Carlos Alva Díaz

    2016-03-01

    Full Text Available El trastorno del espectro de la neuromielitis óptica es una rara enfermedad sistémica autoinmune, que a veces se asocia a otros trastornos autoinmunes incluyendo el síndrome de Sjögren. Las manifestaciones neurológicas ocurren en 20 a 25% de los casos diagnosticados de síndrome de Sjögren. Sin embargo, menos del 5% de los pacientes con este síndrome debutan con sintomatología neurológica. Se presenta el caso de una mujer adulta mayor con anticuerpos positivos para aquaporina-4 (neuromielitis óptica-IgG y síndrome de Sjögren que debuta con mielitis longitudinal extensa.

  1. 75 FR 10245 - S.J. Energy Partners, Inc.; Supplemental Notice That Initial Market-Based Rate Filing Includes...

    Science.gov (United States)

    2010-03-05

    ... From the Federal Register Online via the Government Publishing Office ] DEPARTMENT OF ENERGY Federal Energy Regulatory Commission S.J. Energy Partners, Inc.; Supplemental Notice That Initial Market... supplemental notice in the above-referenced proceeding of S.J. Energy Partners, Inc.'s application for...

  2. Physical activity and physical activity cognitions are potential factors maintaining fatigue in patients with primary Sjögren's syndrome

    NARCIS (Netherlands)

    Van Leeuwen; MD E.J.M. Wouters; Bossema; Bootsma; Geenen; Kruize; Bijlsma

    2012-01-01

    Background Fatigue is a prevalent and debilitating problem in Sjögren's syndrome. It has been suggested that physical activity and cognitions about physical activity can influence fatigue. Objective The aim of this study was to examine fatigue and physical activity levels in patients with Sjögren's

  3. Histoplasmosis diseminada, linfopenia, y síndrome de Sjögren Disseminated histoplasmosis, lymphopenia and Sjögren´s syndrome

    Directory of Open Access Journals (Sweden)

    Horacio F. Rodrigo

    2012-10-01

    Full Text Available El síndrome de Sjögren es una enfermedad autoinmune caracterizada por disminución de las secreciones de las glándulas exocrinas; puede presentar también diversas alteraciones hemáticas, entre ellas linfopenia. Presentamos el caso de un varón de 28 años que consultó por cefalea de un mes de evolución a la que se agregaron en las últimas 48 horas vómitos y fiebre. Presentaba lesiones en piel de tronco y cara; no tenía rigidez de nuca. Se demostró infección por Histoplasma capsulatum var. capsulatum en piel y líquido cefalorraquídeo, linfopenia, anticuerpos anti Ro-SSA positivos, baja concentración del trazador en centellograma de glándulas salivales e infiltración linfocitaria en glándulas salivales, lo que permitió confirmar al diagnóstico de síndrome de Sjögren. El tratamiento con anfotericina liposomal e itraconazol mejoró el cuadro clínico. Comunicamos este caso para referir que una infección oportunista, como la histoplasmosis diseminada, puede ser una forma poco común de presentación del síndrome de Sjögren.Sjögren's syndrome is an autoimmune disease characterized by decreased exocrine gland secretions; patients may also present several hematological abnormalities, like lymphopenia. We describe the case of a 28 year old man who complained of headache a month of duration, with fever and vomiting in the last 48 hours. He also presented skin lesions on trunk and face, without neck stiffness. The diagnosis of duration infection was confirmed by culture from the skin biopsy and spinal fluid specimens; in addition, the presence of lymphopenia, positive anti Ro-SSA antibodies, poor concentration of the tracer in scintigraphy and lymphocytic infiltration in salivary glands confirmed the diagnosis of Sjögren's syndrome. The patient was successfully treated with liposomal amphotericin and itraconazole. We report this case to emphasize that opportunistic infections, such as disseminated histoplasmosis, may be an

  4. The Mechanics and Trajectory Control in Locust Jumping

    Institute of Scientific and Technical Information of China (English)

    Longbao Han; Zhouyi Wang; Aihong Ji; Zhendong Dai

    2013-01-01

    Locusts (Locusta migratoria manilensis) are characterised by their flying ability and abiding jump ability.Research on the jumping mechanics and behavior of locusts plays an important role in elucidating the mechanism of hexapod locomotion.The jump gestures of locusts were observed using high-speed video camera at 250 fps.The reaction forces of the hindlegs were measured using two three-dimensional sensors,in case the two hindlegs attached on separated sensor plates.The jump gestures and reaction forces were used to illustrate the locust jumping mechanism.Results show that the trajectory control is achieved by rapid rolling and yawing movements of the locust body,caused by the forelegs,midlegs and hindlegs in different jumping phases.The final jump trajectory was not determined until hind tarsi left platform.The horizontal co-impulse between two hindlegs might play a key role in jump stability and accuracy.Besides,the angle between two hindlegs affects the control of jump trajectory but has a little effect on the elevation angle of a jump,which is controlled mechanically by the initial position of the hindlegs.This research lays the groundwork for the probable design and development of biomimetic robotics.

  5. Construction and Identification of Recombinant Baculovirus with Schistosoma japonicum Sj16 Gene%日本血吸虫Sj16基因重组杆状病毒的构建和鉴定

    Institute of Scientific and Technical Information of China (English)

    胡少敏; 王海; 阮志燕; 余新炳; 吴忠道

    2005-01-01

    目的利用杆状病毒-昆虫细胞系统构建日本血吸虫 (Schistosoma japonicum, Sj)Sj16基因重组杆状 病毒.方法从日本血吸虫尾蚴提取总 RNA,通过 RT- PCR扩增出 Sj16基因全编码区序列,将其克隆到载体 pET30a(+ )中,通过 PCR将 Sj16基因连同 pET30a(+ )多克隆位点下游的 6× His· Tag一起扩增出来,插入 donor载体 pFastBacHTa中,构建重组杆状病毒 donor载体 pFastBacHTa- Sj16- His,转化大肠杆菌 DH10Bac- GFP进行转座,提取重组 Bacmid,用 Lipofectin法转染昆虫细胞 Sf9使其包装成有感染性的重组杆状病毒.结果构建了含日本血吸虫 Sj16基因的重组 Bacmid- GFP- Sj16- His,转染 Sf9细胞后,获得了有感染力的重组杆状病毒. 结论成功构建了日本血吸虫 Sj16基因重组杆状病毒,为下一步重组 Sj16蛋白表达和 Sj16基因功能研究打下了基础.

  6. Sex differential association of dermatomyositis with Sjögren syndrome

    Science.gov (United States)

    Tseng, Chia-Chun; Chang, Shun-Jen; Tsai, Wen-Chan; Ou, Tsan-Teng; Wu, Cheng-Chin; Sung, Wan-Yu; Hsieh, Ming-Chia; Yen, Jeng-Hsien

    2017-01-01

    BACKGROUND: Although dermatomyositis and Sjögren syndrome share serologic autoantibodies and genetic polymorphisms, population data about the incidence of Sjögren syndrome in patients with dermatomyositis is unavailable. We performed a nationwide cohort study to explore the potential relation between dermatomyositis and Sjögren syndrome and, if an association exists, to elucidate whether it varies by sex. METHODS: We identified all patients with newly diagnosed dermatomyositis from the Registry of Catastrophic Illness Database in Taiwan between Jan. 1, 1998, and Dec. 31, 2011. Each patient was matched to, at most, 5 control patients from the National Health Insurance Research Database by age, sex and entry date. Cox regression was used to calculate the hazard ratio (HR) and 95% confidence interval (CI) of Sjögren syndrome after adjusting for age, sex, rheumatoid arthritis, systemic lupus erythematosus and systemic sclerosis. RESULTS: A total of 1602 patients with dermatomyositis and 7981 control patients were enrolled in the study. There was a positive association of having Sjögren syndrome among patients with dermatomyositis after adjusting for age, sex, rheumatoid arthritis, systemic lupus erythematosus and systemic sclerosis (HR 2.67, 95% CI 2.01–3.54). The association was more pronounced in the male cohort (HR 2.69, 95% CI 1.19–6.09). INTERPRETATION: We found a sex differential association of Sjögren syndrome among patients with dermatomyositis independent of age and concomitant autoimmune disease. Further studies are required to determine the clinical importance of this association for both outcomes and therapeutic options. PMID:28246264

  7. SjTPdb: integrated transcriptome and proteome database and analysis platform for Schistosoma japonicum

    Directory of Open Access Journals (Sweden)

    Wang Zhi-Qin

    2008-06-01

    Full Text Available Abstract Background Schistosoma japonicum is one of the three major blood fluke species, the etiological agents of schistosomiasis which remains a serious public health problem with an estimated 200 million people infected in 76 countries. In recent years, enormous amounts of both transcriptomic and proteomic data of schistosomes have become available, providing information on gene expression profiles for developmental stages and tissues of S. japonicum. Here, we establish a public searchable database, termed SjTPdb, with integrated transcriptomic and proteomic data of S. japonicum, to enable more efficient access and utility of these data and to facilitate the study of schistosome biology, physiology and evolution. Description All the available ESTs, EST clusters, and the proteomic dataset of S. japonicum are deposited in SjTPdb. The core of the database is the 8,420 S. japonicum proteins translated from the EST clusters, which are well annotated for sequence similarity, structural features, functional ontology, genomic variations and expression patterns across developmental stages and tissues including the tegument and eggshell of this flatworm. The data can be queried by simple text search, BLAST search, search based on developmental stage of the life cycle, and an integrated search for more specific information. A PHP-based web interface allows users to browse and query SjTPdb, and moreover to switch to external databases by the following embedded links. Conclusion SjTPdb is the first schistosome database with detailed annotations for schistosome proteins. It is also the first integrated database of both transcriptome and proteome of S. japonicum, providing a comprehensive data resource and research platform to facilitate functional genomics of schistosome. SjTPdb is available from URL: http://function.chgc.sh.cn/sj-proteome/index.htm.

  8. Genetic control of disease in an experimental model for Sjögren's syndrome

    DEFF Research Database (Denmark)

    Andersson, Åsa Inga Maria

    2009-01-01

    Sjögren's syndrome is an autoimmune disease with a complex etiology depending on hereditary and environmental factors. The disease is characterized by lymphocytic infiltration and inflammation in the salivary and lacrimal glands, leading to oral and ocular dryness. To understand the genetic...... susceptibility in Sjögren's syndrome, studies of disease phenotypes have been performed in the non-obese diabetic (NOD) mouse. By the identification of genetic regions controlling development of autoimmune exocrinopathy in the NOD mouse and by reducing one of these regions considerably, Nguyen et al. in a recent...

  9. Bilateral Pleural Effusions as an Initial Presentation in Primary Sjögren's Syndrome

    OpenAIRE

    Go Makimoto; Michiko Asano; Nobukazu Fujimoto; Yasuko Fuchimoto; Katsuichiro Ono; Shinji Ozaki; Koji Taguchi; Takumi Kishimoto

    2012-01-01

    Sjögren’s syndrome (SS) is a systemic autoimmune disease characterized by sicca symptoms. Interstitial pulmonary fibrosis and tracheobronchial sicca are the most common symptoms of pulmonary involvement in primary SjS, and they are rarely accompanied by serositis such as pleuritis or pericarditis. We report a case of SS presenting initially with bilateral pleural effusions. A 63-year old man was admitted to our hospital with a one-month history of cough, dyspnea, and right chest pain. Chest-c...

  10. Diagnóstico e tratamento da síndrome de Sjögren Sjögren's syndrome: diagnosis and treatment

    Directory of Open Access Journals (Sweden)

    Sergio Felberg

    2006-12-01

    Full Text Available A síndrome de Sjögren (SS é doença sistêmica inflamatória crônica, de provável etiologia auto-imune, com distribuição mundial. Seu quadro clínico é responsável por considerável impacto na qualidade de vida de seus portadores. O objetivo deste artigo é descrever seus principais sintomas, os critérios atualmente usados para seu diagnóstico e as modalidades terapêuticas disponíveis até o momento.Sjögren's syndrome is a systemic inflammatory autoimmune disease with worldwide distribution, responsible for considerable impact on the patient's quality of life. The aim of this article is to describe its main symptoms, the currently used different diagnostic criteria and the available treatment for the syndrome.

  11. Promoting balance and jumping skills in children with Down syndrome.

    Science.gov (United States)

    Wang, Wai-Yi; Ju, Yun-Huei

    2002-04-01

    The purpose of this study was to investigate the changes in balance and qualitative and quantitative jumping performances by 20 children with Down syndrome (3 to 6 years) on jumping lessons. 30 typical children ages 3 to 6 years were recruited as a comparison group. Before the jumping lesson, a pretest was given subjects for balance and jumping skill measures based on the Motor Proficiency and Motor Skill Inventory, respectively. Subjects with Down syndrome received 3 sessions on jumping per week for 6 weeks but not the typical children. Then, a posttest was administered to all subjects. Analysis of covariance showed the pre- and posttest differences on scores for floor walk, beam walk, and horizontal and vertical jumping by subjects with Down syndrome were significantly greater than those for the typical children.

  12. Theoretical Modeling of Internal Hydraulic Jump in Density Currents

    CERN Document Server

    Firoozabadi, Bahar; Aryanfar, Asghar; Afshin, Hossein

    2013-01-01

    In this paper, we propose an analytical framework for internal hydraulic jumps. Density jumps or internal hydraulic jumps occur when a supper critical flow of water discharges into a stagnant layer of water with slightly different density. The approach used here is control volume method which is also used to analyze ordinary hydraulic jumps. The important difference here is that entrainment is taken into account. Using conservation equations with the aid of some simplifying assumptions we come to an equation that gives jump downstream height as function of jump upstream characteristics and the entrainment. To determine the magnitude of downstream height we use an experimental equation for calculating the entrainment. Finally we verify our framework by comparing the height that we gain from the derived equation with some experimental data.

  13. A-jump in horizontal inverted semicircular open channels

    Directory of Open Access Journals (Sweden)

    I.M.H. Rashwan

    2013-12-01

    Full Text Available The hydraulic jump is a transitional state from supercritical to subcritical flow. The phenomenon of the hydraulic jump has been widely studied because of its frequent occurrence in nature and because of its uses in many practical applications. In the present study the momentum principle is used to derive an equation expressed the hydraulic jump (A-jump occurred in a short horizontal reach of an inverted semicircular open channel. The derived equation indicates that the initial water depth and the tail water depth (conjugate depths are functions of the critical water depth. Various elements of the hydraulic jump are expressed in dimensionless case. The procedure of dimensionless ratios described in the present paper can be used to determine various elements of A-jump in an inverted semicircular channel when either the discharge and the relative initial depth (or tail water depth is known or the discharge and the relative dissipated energy are known.

  14. A Jump-Diffusion Model with Stochastic Volatility and Durations

    DEFF Research Database (Denmark)

    Wei, Wei; Pelletier, Denis

    Market microstructure theories suggest that the durations between transactions carry information about volatility. This paper puts forward a model featuring stochastic volatility, stochastic conditional duration, and jumps to analyze high frequency returns and durations. Durations affect price...... jumps in two ways: as exogenous sampling intervals, and through the interaction with volatility. We adopt a bivariate Ornstein-Ulenbeck process to model intraday volatility and conditional duration. We develop a MCMC algorithm for the inference on irregularly spaced multivariate processes with jumps....... The algorithm provides smoothed estimates of the latent variables such as spot volatility, conditional duration, jump times, and jump sizes. We apply this model to IBM data and find that volatility and conditional duration are interdependent. We also find that jumps play an important role in return variation...

  15. POISSON TRAFFIC PROCESSES IN PURE JUMP MARKOV PROCESSES AND GENERALIZED NETWORKS

    Institute of Scientific and Technical Information of China (English)

    CAO Chengxuan; XU Guanghui

    2001-01-01

    In this paper, we present the conditions under which the traffic processes in a pure jump Markov process with a general state space are Poisson processes, and give a simple proof of PASTA type theorem in Melamed (1982) and Walrand (1988).Furthermore, we consider a generalized network with phase type negative arrivals and show that the network has a product-form invariant distribution and its traffic processes which represent the customers exiting from the network are Poisson processes.

  16. Clinical, histopathological and immunohistological study of lymphoid disorders in the parotid gland of patients with Sjögren's syndrome

    Directory of Open Access Journals (Sweden)

    Trenkić-Božinović Marija

    2009-01-01

    Full Text Available Bacground/Aim. Sjögren's syndrome is a chronic autoimmune systemic disease characterized by polyglandular tissue destruction, leading to keratoconjunctivitis sicca and xerostomia. These patients have 44-fold increased risk of developing salivary gland lymphoma, of which 80% are marginal zone (MALT type. Having in mind that criteria for distinguishing benign lymphoepithelial lesions from MALT lymphoma are obscure, the aim of this study was to provide practical information that could be integrated into diagnostic practice. Methods. Among 32 parotidectomies, 27 cases were identified as having benign lymphoepithelial disorders and 5 cases low grade MALT lymphoma. Histological sections were stained routinely with hematoxylin and eosin (H&E and special stains. Immunohistochemical study was performed by LSAB2 method, by using primary antibodies for CD20, CD3, Kappa and Lambda light chains and Cytokeratin (Dako Denmark. Results. The 27 patients with Sjögren's sialoadenitis (22 women and 5 men, and 5 patients with MALT lymphoma (only women were included in this analysis. According to the Ann Harbor Classification, all patients with MALT lymphoma had stage IE. Both groups of patients had an indolent clinical course, except permanent, rapid parotid enlargement in the patients with MALT lymphoma. Histologically, the periductal lymphoid infiltrate, gradually extended to the acini, completely replacing them by a sea of polyclonal lymphocytes, immunoblasts, germinal centers and plasma cells (confirmed immunohistochemically, but sparing the ducts and preserving lobular appearance. The histological feature of salivary gland MALT lymphoma included heterogeneous B-cell infiltrate that totally or subtotally had effaced the normal glandular structure. Malign lymphoepithelial lesions, representing infiltration of the ductal and epithelial structures by monoclonal neoplastic Bcells, positive for CD20, were highlighted by antibody to cytokeratin. Conclusion. The

  17. GENETIC PROGRAMMING TO PREDICT SKI-JUMP BUCKET SPILLWAY SCOUR

    Institute of Scientific and Technical Information of China (English)

    AZAMATHULLA H. MD; GHANI A. AB; ZAKARIA N. A; LAI S. H; CHANG C. K; LEOW C. S; ABUHASAN Z

    2008-01-01

    Researchers in the past had noticed that application of Artificial Neural Networks (ANN) in place of conventional statistics on the basis of data mining techniques predicts more accurate results in hydraulic predictions. Mostly these works pertained to applications of ANN. Recently, another tool of soft computing, namely, Genetic Programming (GP) has caught the attention of researchers in civil engineering computing. This article examines the usefulness of the GP based approach to predict the relative scour depth downstream of a common type of ski-jump bucket spillway. Actual field measurements were used to develop the GP model. The GP based estimations were found to be equally and more accurate than the ANN based ones, especially, when the underlying cause-effect relationship became more uncertain to model.

  18. Robust Stabilization for Uncertain Linear Delay Markow Jump System

    Institute of Scientific and Technical Information of China (English)

    钟麦英; 汤兵勇; 黄小原

    2001-01-01

    Markov jump linear systems are defined as a family of linear systems with randomly Markov jumping parameters and are used to model systems subject to failures or changes in structure. The robust stabilization problem of jump linear delay system with umcerratnty was studied. By using of linear matrix inequalities, the existence conditions of robust stabilizing and the state feedback controller designing methods are also presented and proved. Finally, an illustrated example shows the effectiveness of this approach.

  19. Times and Sizes of Jumps in the Mexican Interest Rate

    OpenAIRE

    José Antonio Núñez Mora; Arturo Lorenzo Valdés

    2008-01-01

    This paper examines the role of jumps in a continuous-time short-term interest rate model for Mexico. A filtering algorithm provides estimates of jumps times and sizes in the time series of Mexican cetes for the 1998-2006 period. The empirical results indicate that the inclusion of jumps in the diffusion model represents a better alternative than not to include them.

  20. Multiobjective Optimization Methodology A Jumping Gene Approach

    CERN Document Server

    Tang, KS

    2012-01-01

    Complex design problems are often governed by a number of performance merits. These markers gauge how good the design is going to be, but can conflict with the performance requirements that must be met. The challenge is reconciling these two requirements. This book introduces a newly developed jumping gene algorithm, designed to address the multi-functional objectives problem and supplies a viably adequate solution in speed. The text presents various multi-objective optimization techniques and provides the technical know-how for obtaining trade-off solutions between solution spread and converg

  1. Planar jumping-drop thermal diodes

    Science.gov (United States)

    Boreyko, Jonathan B.; Zhao, Yuejun; Chen, Chuan-Hua

    2011-12-01

    Phase-change thermal diodes rectify heat transport much more effectively than solid-state ones, but are limited by either the gravitational orientation or one-dimensional configuration. Here, we report a planar phase-change diode scalable to large areas with an orientation-independent diodicity of over 100, in which water/vapor is enclosed by parallel superhydrophobic and superhydrophilic plates. The thermal rectification is enabled by spontaneously jumping dropwise condensate which only occurs when the superhydrophobic surface is colder than the superhydrophilic surface.

  2. Understanding the physics of bungee jumping

    OpenAIRE

    Heck, A; Uylings, P.; Kędzierska, E.

    2010-01-01

    Changing mass phenomena like the motion of a falling chain, the behaviour of a falling elastic bar or spring, and the motion of a bungee jumper surprise many a physicist. In this article we discuss the first phase of bungee jumping, when the bungee jumper falls, but the bungee rope is still slack. In instructional material this phase is often considered a free fall, but when the mass of the bungee rope is taken into account, the bungee jumper reaches acceleration greater than g. This result i...

  3. Quantifying show jumping horse rider expertise using IMUs.

    Science.gov (United States)

    Patterson, M; Doyle, J; Cahill, E; Caulfield, B; McCarthy Persson, U

    2010-01-01

    Horse rider ability has long been measured using horse performance, competition results and visual observation. Scientific methods of measuring rider ability on the flat are emerging such as measuring position angles and harmony of the horse-rider system. To date no research has quantified rider ability in show jumping. Kinematic analysis and motion sensors have been used in sports other than show jumping to measure the quality of motor control patterns in humans. The aim of this study was to quantify rider ability in show jumping using body-mounted IMUs. Preliminary results indicate that there are clear differences in experienced and novice riders during show jumping.

  4. Distance perception in the spiny mouse Acomys cahirinus: vertical jumping.

    Science.gov (United States)

    Goldman, M; Skolnick, A J; Hernandez, T P; Tobach, E

    1992-12-01

    Acomys cahirinus, a precocial muroid, that has shown precise jumping in the natural habitat, did not jump from 25 cm in a laboratory situation. To investigate this further, A. cahirinus were observed jumping from platforms at two different heights, onto different sized checkered substrates and from a visual cliff. Adult animals discriminated between platforms that were 6.4 cm and 25.4 cm above the substrate and between small and large checkered patterns on the floor. Most adult animals and neonates jumped down on the shallow side of the visual cliff. Animals developed individual patterns of jumping over a series of trials, with some jumping often, some rarely, and others jumping only from the low platform. Good distance perception was indicated when they did not jump from heights, and by their making appropriate postural adjustment when they did jump from heights and landed without mishap. Different spacing of trials indicated that height was a more effective stimulus for animals which had all four conditions on the same day, while floor pattern was more effective for animals with each of the four conditions on a separate day.

  5. Long memory behavior of returns after intraday financial jumps

    Science.gov (United States)

    Behfar, Stefan Kambiz

    2016-11-01

    In this paper, characterization of intraday financial jumps and time dynamics of returns after jumps is investigated, and will be analytically and empirically shown that intraday jumps are power-law distributed with the exponent 1 finance, it is important to be able to distinguish between jumps and continuous sample path price movements, and this can be achieved by introducing a statistical test via calculating sums of products of returns over small period of time. In the case of having jump, the null hypothesis for normality test is rejected; this is based on the idea that returns are composed of mixture of normally-distributed and power-law distributed data (∼ 1 /r 1 + μ). Probability of rejection of null hypothesis is a function of μ, which is equal to one for 1 high returns after jumps are the effect; we show that returns caused by jump decay as power-law distribution. To test this idea empirically, we average over the time dynamics of all days; therefore the superposed time dynamics after jump represent a power-law, which indicates that there is a long memory with a power-law distribution of return after jump.

  6. Biomechanics research in ski jumping, 1991-2006.

    Science.gov (United States)

    Schwameder, Hermann

    2008-01-01

    In this paper, I review biomechanics research in ski jumping with a specific focus on publications presented between 1991 and 2006 on performance enhancement, limiting factors of the take-off, specific training and conditioning, aerodynamics, and safety. The first section presents a brief description of ski jumping phases (in-run, take-off, early flight, stable flight, and landing) regarding the biomechanical and functional fundamentals. The most important and frequently used biomechanical methods in ski jumping (kinematics, ground reaction force analyses, muscle activation patterns, aerodynamics) are summarized in the second section. The third section focuses on ski jumping articles and research findings published after the establishment of the V-technique in 1991, as the introduction of this technique has had a major influence on performance enhancement, ski jumping regulations, and the construction of hill profiles. The final section proposes topics for future research in the biomechanics of ski jumping, including: take-off and early flight and the relative roles of vertical velocity and forward somersaulting angular momentum; optimal jumping patterns utilizing the capabilities of individual athletes; development of kinematic and kinetic feedback systems for hill jumps; comparisons of simulated and hill jumps; effect of equipment modifications on performance and safety enhancement.

  7. Competitive Lotka-Volterra Population Dynamics with Jumps

    CERN Document Server

    Bao, Jianhai; Yin, Geroge; Yuan, Chenggui

    2011-01-01

    This paper considers competitive Lotka-Volterra population dynamics with jumps. The contributions of this paper are as follows. (a) We show stochastic differential equation (SDE) with jumps associated with the model has a unique global positive solution; (b) We discuss the uniform boundedness of $p$th moment with $p>0$ and reveal the sample Lyapunov exponents; (c) Using a variation-of-constants formula for a class of SDEs with jumps, we provide explicit solution for 1-dimensional competitive Lotka-Volterra population dynamics with jumps, and investigate the sample Lyapunov exponent for each component and the extinction of our $n$-dimensional model.

  8. pH jump induced α-helix folding.

    Directory of Open Access Journals (Sweden)

    Donten M. L.

    2013-03-01

    Full Text Available pH can be used to impact the folding equilibrium of peptides and proteins. This fact is utilized, similarly to temperature jumps, in pH jump experiments employing laser time-resolved spectroscopy to study the function and structural dynamics of these molecules. Here the application of pH jumps in folding experiments was investigated. Experiments with poly-L-glutamic acid alpha-helix formation shown the critical aspects of pH jump experiments and yielded direct information about the folding kinetics monitored with the amide I IR band.

  9. Effect of drop jump technique on the reactive strength index

    Directory of Open Access Journals (Sweden)

    Struzik Artur

    2016-09-01

    Full Text Available The basic drill of plyometric training aimed at improving lower limb power and jump height is a drop jump. This exercise can be performed using different techniques, which substantially affects jump variables. Therefore, the aim of this study was to compare the values of the reactive strength index (RSI for countermovement drop jumps (CDJs and bounce drop jumps (BDJs. The study was carried out in a group of 8 male youth basketball players. The tests were conducted using the AMTI BP600900 force plate to measure ground reaction forces and the Noraxon MyoMotion system to record kinematic data. Each player performed two CDJs and two BDJs from the height of 15, 30, 45 and 60 cm. The RSI was calculated as a ratio of jump height and contact time. Moreover, the RSI was determined for the amortization and take-off phases separately. Significant differences (p < 0.05 between RSI values for CDJs and BDJs were recorded for jumps from 30, 45 and 60 cm. Differences in RSI values for jumps from 15 cm were not significant. Furthermore, CDJ height values were significantly higher (p < 0.05 than the values recorded for BDJs. Times of contact, amortization and take-off during BDJs were significantly shorter (p < 0.05 than the respective values obtained for CDJs. Therefore, the use of the RSI to monitor plyometric training should be based on the drop jump technique that is commonly performed by basketball players.

  10. Development of a Minimally Actuated Jumping-Rolling Robot

    Directory of Open Access Journals (Sweden)

    Thanhtam Ho

    2015-04-01

    Full Text Available This paper presents development of a hybrid mobile robot in order to take advantage of both rolling and jumping locomotion on the ground. According to the unique design of the mechanism, the robot is able to execute both jumping and rolling skilfully by using only one DC motor. Changing the centre of gravity enables rolling of the robot and storage of energy is utilized for jumping. Mechanism design and control logic are validated by computer simulation. Simulation results show that the robot can jump nearly 1.3 times its diameter and roll at the speed of 3.3 times its diameter per second.

  11. Construction of a recombinant plasmid pGEX-Sj26GST of Schistosoma japonicum and expression in Escherichia coli BL21( DE3)

    Institute of Scientific and Technical Information of China (English)

    张丽

    2014-01-01

    Objective To construct and express a recombinant plasmid pGEX-Sj26GST of Schistosoma japonicum(Sj)in Escherichia coli(E.coli)BL21(DE3).Methods Total RNA was extracted from Sj adult worms by RNeasy Mini kit,26 kilodalton glutathione-S-transferases of Schistosoma japonicum(Sj26GST)antigen gene was amplified by real-time PCR(RT-PCR)from the total RNA,then cloned into a prokaryotic expression plasmid pGEX-1λT and transformed into E.coli BL21(DE3)to construct pGEX-Sj26GST;BL21(pGEX-

  12. Exploiting knowledge of jump-up and jump-down frequencies to determine the parameters of a Duffing oscillator

    Science.gov (United States)

    Ramlan, Roszaidi; Brennan, Michael J.; Kovacic, Ivana; Mace, Brian R.; Burrow, Stephen G.

    2016-08-01

    This work concerns the application of certain non-linear phenomena - jump frequencies in a base-excited Duffing oscillator - to the estimation of the parameters of the system. First, approximate analytical expressions are derived for the relationships between the jump-up and jump-down frequencies, the damping ratio and the cubic stiffness coefficient. Then, experimental results, together with the results of numerical simulations, are presented to show how knowledge of these frequencies can be exploited.

  13. Nye udannelsesformater og undervisningsformer i University College Sjælland

    DEFF Research Database (Denmark)

    Christiansen, René B.; Gynther, Karsten

    2011-01-01

    UCSJ har en uddannelsesopgave i forhold til hele Region Sjællands geografiske område. Grundet regionens geografiske store omfang og deraf hørende udkantsproblematikker stiller det UCSJ overfor nogle særlige udfordringer i forhold til udbud af uddannelser og undervisning. Dette papir tager afsæt i...

  14. Sjögren’s syndrome associated with systemic lupus erythematosus

    Science.gov (United States)

    Taşdemir, Mehmet; Hasan, Chiar; Ağbaş, Ayşe; Kasapçopur, Özgür; Canpolat, Nur; Sever, Lale; Çalışkan, Salim

    2016-01-01

    Systemic lupus erythematosus and Sjögren’s syndrome are chronic auto- inflammatory disorders which can lead to serious organ damage. Although systemic lupus erythematosus and Sjögren’s syndrome were previously considered two forms of the same disease because of presence of clinical coexistence of these two conditions, the view that they are two different conditions with mutual characteristics has become prominent in recent years. In this paper, we reported a 16 year-old girl who was followed up with a diagnosis of Sjögren’s syndrome for six years and then was observed to have overlap of systemic lupus erythematosus. In the baseline, she did not have any clinical or serological evidence for systemic lupus erythematosus. After six year, massive proteinuria and serological findings developed and systemic lupus erythematosus nephritis was diagnosed by kidney biopsy. Currently, systemic lupus erythematosus and Sjögren’s syndrome cannot be differentiated definetely. We need more valuable diagnostic and classification criteria to differentiate these two important conditions. PMID:27738403

  15. EULAR Sjögren's syndrome disease activity index (ESSDAI) : a user guide

    NARCIS (Netherlands)

    Seror, Raphaèle; Bowman, Simon J; Brito-Zeron, Pilar; Theander, Elke; Bootsma, Hendrika; Tzioufas, Athanasios; Gottenberg, Jacques-Eric; Ramos-Casals, Manel; Dörner, Thomas; Ravaud, Philippe; Vitali, Claudio; Mariette, Xavier; Asmussen, Karsten; Jacobsen, Soren; Bartoloni, Elena; Gerli, Roberto; Bijlsma, Johannes Wj; Kruize, Aike A; Bombardieri, Stefano; Bookman, Arthur; Kallenberg, Cees; Meiners, Petra; Brun, Johan G; Jonsson, Roland; Caporali, Roberto; Carsons, Steven; De Vita, Salvatore; Del Papa, Nicoletta; Devauchelle, Valerie; Saraux, Alain; Fauchais, Anne-Laure; Sibilia, Jean; Hachulla, Eric; Illei, Gabor; Isenberg, David; Jones, Adrian; Manoussakis, Menelaos; Mandl, Thomas; Jacobsson, Lennart; Demoulins, Frederic; Montecucco, Carlomaurizio; Ng, Wan-Fai; Nishiyama, Sumusu; Omdal, Roald; Parke, Ann; Praprotnik, Sonja; Tomsic, Matjia; Price, Elizabeth; Scofield, Hal; L Sivils, Kathy; Smolen, Josef; Laqué, Roser Solans; Steinfeld, Serge; Sutcliffe, Nurhan; Sumida, Takayuki; Valesini, Guido; Valim, Valeria; Vivino, Frederick B; Vollenweider, Cristina

    2015-01-01

    The EULAR Sjögren's syndrome (SS) disease activity index (ESSDAI) is a systemic disease activity index that was designed to measure disease activity in patients with primary SS. With the growing use of the ESSDAI, some domains appear to be more challenging to rate than others. The ESSDAI is now in u

  16. TSP-1 Deficiency Alters Ocular Microbiota: Implications for Sjögren's Syndrome Pathogenesis

    OpenAIRE

    Terzulli, Marielle; Ruiz, Laura Contreras; Kugadas, Abirami; Masli, Sharmila; Gadjeva, Mihaela

    2015-01-01

    Purpose: The potential role of commensals as triggering factors that promote inflammation in dry eye disease has not been explored. The objective of this study was to evaluate whether ocular microbiota changes with the onset of dry eye disease in thrombospondin-1-deficient (TSP-1−/−) mice, a strain that develops Sjögren's syndrome-like disease.

  17. The burden of Sjögren's syndrome, dryness and fatigue

    NARCIS (Netherlands)

    van Leeuwen, N.

    2014-01-01

    Dryness and fatigue are prevalent and debilitating symptoms in Sjögren’s syndrome. In this thesis, consequences of dryness for patients’ well-being and daily life functioning, and possible targets for treatment were described. In the first part of this thesis, an encompassing overview of the

  18. Mesenteric Inflammatory Venoocclusive Disease in a Patient with Sjögren’s Syndrome

    Directory of Open Access Journals (Sweden)

    Raquel Rios-Fernández

    2014-01-01

    Full Text Available Mesenteric inflammatory venoocclusive disease is an uncommon cause of intestinal ischemia. Certain diseases, such as hypercoagulation disorders, autoimmune diseases, or drugs have been associated with the pathogenesis of mesenteric inflammatory venoocclusive disease. Here, we report a patient with Sjögren’s syndrome who underwent surgery for suspected acute appendicitis with a subsequent pathological diagnosis of mesenteric inflammatory venoocclusive disease.

  19. Jump dynamics due to jump datum of compressible viscous Navier-Stokes flows in a bounded plane domain

    Science.gov (United States)

    Kweon, Jae Ryong

    2016-09-01

    In this paper, when the initial density has a jump across an interior curve in a bounded domain, we show unique existence, piecewise regularity and jump discontinuity dynamics for the density and the velocity vector governed by the Navier-Stokes equations of compressible viscous barotropic flows. A critical difficulty is in controlling the gradient of the pressure across the jump curve. This is resolved by constructing a vector function associated with the pressure jump value on the convecting curve and extending it to the whole domain.

  20. Numerical and Experimental Study of the Dynamics of Imploding Hydraulic Jumps

    Science.gov (United States)

    Gunter, Amy-Lee; Smadi, Othman; Kiyanda, Charles; Kadem, Lyes; Ng, Hoi Dick

    2009-11-01

    The dynamics of imploding hydraulic jumps is investigated in this study. Experimental and numerical studies are performed to identify the critical conditions at which circular shallow water waves can be produced and amplify as they propagate toward the center without wave breaking. These conditions enable water waves to behave analogously to gaseous shock waves through the hydraulic analogy. The stability of the imploding jumps is also analyzed by introducing obstacles in the path of the implosion. Experimentally, a gate-type water table is constructed and the creation of a circular converging hydraulic jump is achieved by retracting the gate which separate two volumes of water by mean of three pneumatic pistons. A CCD camera is used to visualize the dynamics of the implosion. The acquired images are processed on Matlab using an image processing toolbox based algorithm which detects the shape and trajectory of the imploding wave. To compare the characteristics of the imploding jump and the mechanism of wave breaking, numerical simulations using Volume of Fluid (VOF) and Smoothed Particles Hydrodynamics (SPH) methods are performed. The experimental and numerical results are compared with the Chester-Chisnell-Whitham (CCW) approximate solution of the shallow water wave equations.

  1. Connectivity, Information Jumps, and Market Stability: An Agent-Based Approach

    Directory of Open Access Journals (Sweden)

    Khaldoun Khashanah

    2017-01-01

    Full Text Available We propose a metamodel to assess simulated market stability by introducing information connectivity in an agent-based network. The market is occupied by heterogeneous agents with different behaviors, strategies, and information connectivity. A jump-diffusion process simulating events that may occur in the market is introduced. Agents information awareness varies along with agents propensity to respond to the information jump and jump size. A jump reshuffles market positions based on agents risk preferences determined by behavior and strategy. We examine the effect of information awareness on the volatility index of the simulated market in a scale-free market network. The analysis is performed by developing five experiments wherein the first one corresponds to systemic information ignorance state. Three experiments examine the role of hubs, normal agents, and hermits in the network when intermediate combinations of agent types have information awareness. The fifth experiment corresponds to the systemic information awareness with all agents being informed. The results show that the simulated market is driven to instability in a similar manner to patterns observed in a crisis where all agents become homogeneous in information awareness of events. Hubs contribute to increased connectivity and act as amplifiers of good, bad, or inaccurate information or sentiment.

  2. Power output in vertical jumps: Does optimum loading depend on activity profiles?

    Science.gov (United States)

    Pazin, Nemanja; Berjan, Bobana; Nedeljkovic, Aleksandar; Markovic, Goran; Jaric, Slobodan

    2013-01-01

    The previously proposed Maximum Dynamic Output hypothesis (MDO; i.e. the optimum load for maximizing the power output during jumping is one's own body) was tested on individuals of various activity profiles. Forty males (10 strength-trained athletes, 10 speed-trained athletes, 10 physically active non-athletes, and 10 sedentary individuals) performed different vertical jumps on a force plate while a pulley system was used to either reduce or increase the subject's body weight by 10–30%. As expected, an increase in external loading resulted in a significant increase (p < 0.001) in force output and a concomitant decrease of peak jumping velocity in all groups of participants. The main finding, however, was that all groups revealed the maximum peak and mean power output at approximately the subjects’ own body weight although their weight represented prominently different percentage of their maximum dynamic strength. While a significant (p < 0.05), albeit moderate, 'group × load' interaction in one jump was observed for the peak power output, the individual optimum load for maximizing the power output number did not differ among the groups. Although apparently further research on various types of movements is needed, the present results provide, so far, the strongest support of the MDO hypothesis. PMID:22864398

  3. Understanding the physics of bungee jumping

    Science.gov (United States)

    Heck, André; Uylings, Peter; Kędzierska, Ewa

    2010-01-01

    Changing mass phenomena like the motion of a falling chain, the behaviour of a falling elastic bar or spring, and the motion of a bungee jumper surprise many a physicist. In this article we discuss the first phase of bungee jumping, when the bungee jumper falls, but the bungee rope is still slack. In instructional material this phase is often considered a free fall, but when the mass of the bungee rope is taken into account, the bungee jumper reaches acceleration greater than g. This result is contrary to the usual experience with free falling objects and therefore hard to believe for many a person, even an experienced physicist. It is often a starting point for heated discussions about the quality of the experiments and the physics knowledge of the experimentalist, or it may even prompt complaints about the quality of current physics education. But experiments do reveal the truth and students can do them supported by information and communication technology (ICT) tools. We report on a research project done by secondary school students and use their work to discuss how measurements with sensors, video analysis of self-recorded high-speed video clips and computer modelling allow study of the physics of bungee jumping.

  4. Neuromuscular function during drop jumps in young and elderly males.

    Science.gov (United States)

    Piirainen, Jarmo M; Linnamo, Vesa; Sippola, Niina; Avela, Janne

    2012-12-01

    The Hoffman reflex (H-reflex), indicating alpha-motoneuron pool activity, has been shown to be task - and in resting conditions - age dependent. How aging affects H-reflex activity during explosive movements is not clear at present. The purpose of this study was to examine the effects of aging on H-reflexes during drop jumps, and its possible role in drop jump performance. Ten young (26.8 ± 2.7 years) and twenty elderly (64.2 ± 2.7 years) subjects participated in the study. Maximal drop jump performance and soleus H-reflex response (H/M jump) 20 ms after ground contact were measured in a sledge ergometer. Maximal H-reflex, maximal M-wave, Hmax/Mmax-ratio and H-reflex excitability curves were measured during standing rest. Although in young the H-reflex response (Hmax/Mmax) was 6.5% higher during relaxed standing and 19.7% higher during drop jumps (H jump/M jump) than in the elderly group, these differences were not statistically significant. In drop jumps, the elderly subjects had lower jumping height (30.4%, p push-off force (18.0%, p push-off time (31.0% p push-off force (r = 0.833, p push-off time (r = -0.857, p strategies in drop jumps. However, it does not fully explain age related differences in jumping performance, since age related differences in H-reflex activity were non-significant. Copyright © 2012 Elsevier Ltd. All rights reserved.

  5. Traumatic unilateral lumbosacral jumped facet without fracture in a child - presentation of a safe treatment strategy for a rare injury.

    Science.gov (United States)

    Szentirmai, Oszkar; Seinfeld, Joshua; Beauchamp, Kathryn; Patel, Vikas

    2008-11-10

    The vast majority of pediatric lumbosacral spondylolisthesis have developmental etiology. Of the very rare type of pediatric lumbosacral facet dislocations, there are only three reported cases of a pediatric unilateral jumped facet injury. All of these cases are associated with fracture dislocation of L5-S1. Hyperflexion with rotation is thought to provoke this uncommon type of spine injury.The authors report the first pediatric patient reported in literature to date with a traumatic unilateral jumped facet at the lumbosacral joint without fracture. The presentation, surgical treatment, hospital course, outcome and management options with the review of the literature is summarized.

  6. Flow and heat transfer of nanofluids over a rotating porous disk with velocity slip and temperature jump

    Energy Technology Data Exchange (ETDEWEB)

    Yin, Chenguang; Zheng, Liancun [Univ. of Science and Technology Beijing (China). School of Mathematics and Physics; Zhang, Chaoli [Univ. of Science and Technology Beijing (China). School of Mathematics and Physics; Univ. of Science and Technology Beijing (China). School of Mechanical Engineering; Zhang, Xinxin [Univ. of Science and Technology Beijing (China). School of Mechanical Engineering

    2015-09-01

    In this article, we discuss the flow and heat transfer of nanofluids over a rotating porous disk with velocity slip and temperature jump. Three types of nanoparticles - Cu, Al{sub 2}O{sub 3}, and CuO - are considered with water as the base fluid. The nonlinear governing equations are reduced into ordinary differential equations by Von Karman transformations and solved using homotopy analysis method (HAM), which is verified in good agreement with numerical ones. The effects of involved parameters such as porous parameter, velocity slip, temperature jump, as well as the types of nanofluids on velocity and temperature fields are presented graphically and analysed.

  7. Chasing maximal performance: a cautionary tale from the celebrated jumping frogs of Calaveras County.

    Science.gov (United States)

    Astley, H C; Abbott, E M; Azizi, E; Marsh, R L; Roberts, T J

    2013-11-01

    Maximal performance is an essential metric for understanding many aspects of an organism's biology, but it can be difficult to determine because a measured maximum may reflect only a peak level of effort, not a physiological limit. We used a unique opportunity provided by a frog jumping contest to evaluate the validity of existing laboratory estimates of maximum jumping performance in bullfrogs (Rana catesbeiana). We recorded video of 3124 bullfrog jumps over the course of the 4-day contest at the Calaveras County Jumping Frog Jubilee, and determined jump distance from these images and a calibration of the jump arena. Frogs were divided into two groups: 'rental' frogs collected by fair organizers and jumped by the general public, and frogs collected and jumped by experienced, 'professional' teams. A total of 58% of recorded jumps surpassed the maximum jump distance in the literature (1.295 m), and the longest jump was 2.2 m. Compared with rental frogs, professionally jumped frogs jumped farther, and the distribution of jump distances for this group was skewed towards long jumps. Calculated muscular work, historical records and the skewed distribution of jump distances all suggest that the longest jumps represent the true performance limit for this species. Using resampling, we estimated the probability of observing a given jump distance for various sample sizes, showing that large sample sizes are required to detect rare maximal jumps. These results show the importance of sample size, animal motivation and physiological conditions for accurate maximal performance estimates.

  8. Modeling financial contagion using mutually exciting jump processes

    NARCIS (Netherlands)

    Aït-Sahalia, Y.; Cacho-Diaz, J.; Laeven, R.J.A.

    2013-01-01

    We propose a model designed to capture the dynamics of asset returns, with periods of crises that are characterized by contagion. In the model, a jump in one region of the world increases the intensity of jumps both in the same region (self-excitation) as well as in other regions (mutual

  9. Modeling financial contagion using mutually exciting jump processes

    NARCIS (Netherlands)

    Aït-Sahalia, Y.; Cacho-Diaz, J.; Laeven, R.J.A.

    2015-01-01

    We propose a model to capture the dynamics of asset returns, with periods of crises that are characterized by contagion. In the model, a jump in one region of the world increases the intensity of jumps both in the same region (self-excitation) as well as in other regions (cross-excitation),

  10. How Can We Tell if Frogs Jump Further?

    Science.gov (United States)

    Drummond, Gordon B.; Tom, Brian D. M.

    2011-01-01

    How effective is training frogs to jump? This is perhaps the most frequent question in biology that is subjected to statistical analysis: does a treatment make a difference? One can examine whether there is indeed a training effect, by first assuming the opposite. That is, the authors assume that training has no effect on the mean distance jumped.…

  11. Jump Tails, Extreme Dependencies, and the Distribution of Stock Returns

    DEFF Research Database (Denmark)

    Bollerslev, Tim; Todorov, Viktor

    We provide a new framework for estimating the systematic and idiosyncratic jump tail risks in financial asset prices. The theory underlying our estimates are based on in-fill asymptotic arguments for directly identifying the systematic and idiosyncratic jumps, together with conventional long...

  12. The Triple Jump: Assessing Problem Solving in Psychiatry.

    Science.gov (United States)

    O'Gorman, Ethna C.; Trimble, Peter; Smyth, Joe

    1998-01-01

    Describes an attempt to assess a final-year course in psychiatry using the Triple Jump. In this course, students on placement in psychiatric units perfect psychiatry skills that were acquired during the previous year by direct contact with patients. The Triple Jump is used to assess problem-solving skills in management strategy on cases. (PVD)

  13. Feller Property for a Special Hybrid Jump-Diffusion Model

    Directory of Open Access Journals (Sweden)

    Jinying Tong

    2014-01-01

    Full Text Available We consider the stochastic stability for a hybrid jump-diffusion model, where the switching here is a phase semi-Markovian process. We first transform the process into a corresponding jump-diffusion with Markovian switching by the supplementary variable technique. Then we prove the Feller and strong Feller properties of the model under some assumptions.

  14. A time inhomogeneous Cox-Ingersoll-Ross diffusion with jumps

    CERN Document Server

    Hoepfner, Reinhard

    2009-01-01

    We consider a time inhomogeneous Cox-Ingersoll-Ross diffusion with positive jumps. We exploit a branching property to prove existence of a unique strong solution under a restrictive condition on the jump measure. We give Laplace transforms for the transition probabilities, with an interpretation in terms of limits of mixtures over Gamma laws.

  15. How Can We Tell if Frogs Jump Further?

    Science.gov (United States)

    Drummond, Gordon B.; Tom, Brian D. M.

    2011-01-01

    How effective is training frogs to jump? This is perhaps the most frequent question in biology that is subjected to statistical analysis: does a treatment make a difference? One can examine whether there is indeed a training effect, by first assuming the opposite. That is, the authors assume that training has no effect on the mean distance jumped.…

  16. Tuning Superhydrophobic Nanostructures to Enhance Jumping-Droplet Condensation

    Science.gov (United States)

    Mulroe, Megan; Srijanto, Bernadeta; Collier, Patrick; Boreyko, Jonathan

    2016-11-01

    It was recently discovered that condensation growing on a nanostructured superhydrophobic surface can spontaneously jump off the surface when two or more droplets coalesce together. The minimum droplet size for jumping to occur is of order 10 microns, but it is unclear whether this is the true lower limit of jumping droplets or simply a limitation of current superhydrophobic surfaces. Here, we analyze the dynamics of jumping droplets on six different superhydrophobic surfaces where the topography of the nanopillars was systematically varied. The critical diameter for jumping to occur was observed to be highly dependent upon the height and diameter of the nanopillars; surfaces with very tall and slender nanopillars enabled jumping droplets at a smaller critical size of order 1 micron. An energetic model of the incipient growth of condensate shows that the nanostructure topology affects the rate of increase of a growing droplet's apparent contact angle, with jumping being enabled at very large angles. These findings indicate that the true upper limit to the performance of jumping-droplet condensers has not yet been reached and can be further improved using advanced nanofabrication techniques.

  17. Empirical likelihood inference for diffusion processes with jumps

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    In this paper, we consider the empirical likelihood inference for the jump-diffusion model. We construct the confidence intervals based on the empirical likelihood for the infinitesimal moments in the jump-diffusion models. They are better than the confidence intervals which are based on the asymptotic normality of point estimates.

  18. A Safe and Effective Modification of Thomson's Jumping Ring Experiment

    Science.gov (United States)

    Waschke, Felix; Strunz, Andreas; Meyn, Jan-Peter

    2012-01-01

    The electrical circuit of the jumping ring experiment based on discharging a capacitor is optimized. The setup is scoop proof at 46 V and yet the ring jumps more than 9 m high. The setup is suitable for both lectures and student laboratory work in higher education. (Contains 1 table, 8 figures and 3 footnotes.)

  19. Evaluation of Metabolic Stress between Jumping at Different Cadences on the Digi-Jump Machine.

    Science.gov (United States)

    Lyons, Thomas S; Navalta, James W; Callahan, Zachary J

    The American College of Sports Medicine (ACSM) recommends that healthy adults achieve a minimum of thirty minutes of moderate intensity aerobic exercise five days per week. While cycling, walking, and jogging are commonly observed methods of achieving these recommendations, another option may be repetitive jumping. The purpose of this study was to examine the metabolic responses between repetitive jumping at a cadence of 120 jumps per minute (JPMs) vs. 100 JPMs when utilizing the Digi-Jump machine. Twenty-eight subjects completed two jumping trials, one at 120 JPMs and one at 100 JPMs. Subjects jumped until volitional exhaustion, or for a maximum of fifteen minutes. Oxygen uptake (VO2), heart rate (HR), respiratory exchange ratio (RER), and rating of perceived exertion (RPE) were assessed each minute of each exercise trial. RPE was differentiated, in that subjects reported perceived exertion of their total body, their upper-leg, and their lower leg. Results of this study indicated that there was no significant difference between the two trials for VO2, HR, or total body RPE. Differences were reported between trials for peak and average RER, with the 120 JPM trial eliciting a lower RER for both (peak: 1.08 ± .087 vs. 1.17 ± .1 p=.000; average: .99 ± .076 vs. 1.04 ± .098 p=.002), peak upper leg RPE (120: 15.29 ± 3.89 vs. 100: 16.75 ± 2.52 p=.022), and average lower leg RPE (120: 15.04 ± 2.55 vs. 100: 13.94 ± 2.02 p=.019). Also, there was a significant difference in exercise duration between the trials, with subjects able to exercise longer during the 120 JPM trial (12.4 ± 3.42 mins vs. 9.68 ± 4.31 mins p=.000). These data indicate that while the physiological stress may not be different between the two trials as indicated by VO2 and HR, the 120 JPM trial appears less strenuous as evidenced by RER values and by subjects' ability to exercise longer at that cadence.

  20. The hydraulic jump and ripples in liquid helium

    Energy Technology Data Exchange (ETDEWEB)

    Rolley, E. [Laboratoire de Physique Statistique de l' ENS, associe au CNRS et aux Universites Paris 6 et Paris 7, 24 rue Lhomond, 75005 Paris (France)]. E-mail: rolley@lps.ens.fr; Guthmann, C. [Laboratoire de Physique Statistique de l' ENS, associe au CNRS et aux Universites Paris 6 et Paris 7, 24 rue Lhomond, 75005 Paris (France); Pettersen, M.S. [Washington and Jefferson College, 60 S. Lincoln St., Washington, PA 15301 (United States)

    2007-05-01

    We have studied the characteristics of the circular hydraulic jump using liquid helium. Surprisingly, the radius of the jump does not change at the superfluid transition. We think that the flow is still dissipative below the lambda point because the velocity exceeds the critical one. The jump radius R{sub j} is compared with various models. In our parameter range, we find that the jump can be treated as a shock, and that capillary effects are important. Below the superfluid transition, we observed a standing capillary wave between the impact of the jet and the jump. Assuming that the superfluid flow can be described with an effective viscosity, we calculate the wave vector and thus obtain the value of the liquid thickness, which is in reasonable agreement with predictions. However, the spatial variation of the wave amplitude depends much more strongly on temperature than we calculate.

  1. Early Environmental Conditions Shape Personality Types in a Jumping Spider

    OpenAIRE

    Liedtke, Jannis; Redekop, Daniel; Jutta M Schneider; Schuett, Wiebke

    2015-01-01

    Individuals of many species across the animal kingdom are found to be less plastic than expected, even in behavioral traits. The existence of consistent behavioral differences between individuals, termed “personality differences”, is puzzling, since plastic behavior is considered ideal to enable animals to adaptively respond to changes in environmental conditions. In order to elucidate which mechanisms are important for the evolution of personality differences, it is crucial to understand whi...

  2. Research progress on Sj14-3-3 vaccine of Schistosoma japonicum%日本血吸虫Sj14-3-3疫苗研究进展

    Institute of Scientific and Technical Information of China (English)

    谭建蓉; 李文桂

    2014-01-01

    日本血吸虫病是由日本血吸虫引起的一类严重危害人类健康的人兽共患寄生虫病,研制疫苗防治该病是目前的研究热点.Sj14-3-3蛋白是一种有效的疫苗分子,该文就Sj14-3-3蛋白疫苗和核酸疫苗的研究进展进行综述.%Schistosomiasis japonica is a serious health-threatening parasitic zoonosis to human beings,which is caused by Schistosomajaponicum.Developing vaccines for schistosomiasis is a hot spot in the present studies.Sj14-3-3 protein is an effective vaccine.This article reviewed the progress on Sj14-3-3 protein vaccines and DNA vaccines.

  3. Effects of isometric scaling on vertical jumping performance.

    Directory of Open Access Journals (Sweden)

    Maarten F Bobbert

    Full Text Available Jump height, defined as vertical displacement in the airborne phase, depends on vertical takeoff velocity. For centuries, researchers have speculated on how jump height is affected by body size and many have adhered to what has come to be known as Borelli's law, which states that jump height does not depend on body size per se. The underlying assumption is that the amount of work produced per kg body mass during the push-off is independent of size. However, if a big body is isometrically downscaled to a small body, the latter requires higher joint angular velocities to achieve a given takeoff velocity and work production will be more impaired by the force-velocity relationship of muscle. In the present study, the effects of pure isometric scaling on vertical jumping performance were investigated using a biologically realistic model of the human musculoskeletal system. The input of the model, muscle stimulation over time, was optimized using jump height as criterion. It was found that when the human model was miniaturized to the size of a mouse lemur, with a mass of about one-thousandth that of a human, jump height dropped from 40 cm to only 6 cm, mainly because of the force-velocity relationship. In reality, mouse lemurs achieve jump heights of about 33 cm. By implication, the unfavourable effects of the small body size of mouse lemurs on jumping performance must be counteracted by favourable effects of morphological and physiological adaptations. The same holds true for other small jumping animals. The simulations for the first time expose and explain the sheer magnitude of the isolated effects of isometric downscaling on jumping performance, to be counteracted by morphological and physiological adaptations.

  4. Effects of isometric scaling on vertical jumping performance.

    Science.gov (United States)

    Bobbert, Maarten F

    2013-01-01

    Jump height, defined as vertical displacement in the airborne phase, depends on vertical takeoff velocity. For centuries, researchers have speculated on how jump height is affected by body size and many have adhered to what has come to be known as Borelli's law, which states that jump height does not depend on body size per se. The underlying assumption is that the amount of work produced per kg body mass during the push-off is independent of size. However, if a big body is isometrically downscaled to a small body, the latter requires higher joint angular velocities to achieve a given takeoff velocity and work production will be more impaired by the force-velocity relationship of muscle. In the present study, the effects of pure isometric scaling on vertical jumping performance were investigated using a biologically realistic model of the human musculoskeletal system. The input of the model, muscle stimulation over time, was optimized using jump height as criterion. It was found that when the human model was miniaturized to the size of a mouse lemur, with a mass of about one-thousandth that of a human, jump height dropped from 40 cm to only 6 cm, mainly because of the force-velocity relationship. In reality, mouse lemurs achieve jump heights of about 33 cm. By implication, the unfavourable effects of the small body size of mouse lemurs on jumping performance must be counteracted by favourable effects of morphological and physiological adaptations. The same holds true for other small jumping animals. The simulations for the first time expose and explain the sheer magnitude of the isolated effects of isometric downscaling on jumping performance, to be counteracted by morphological and physiological adaptations.

  5. Dynamics and stability of directional jumps in the desert locust

    Science.gov (United States)

    Gvirsman, Omer

    2016-01-01

    Locusts are known for their ability to jump large distances to avoid predation. The jump also serves to launch the adult locust into the air in order to initiate flight. Various aspects of this important behavior have been studied extensively, from muscle physiology and biomechanics, to the energy storage systems involved in powering the jump, and more. Less well understood are the mechanisms participating in control of the jump trajectory. Here we utilise video monitoring and careful analysis of experimental directional jumps by adult desert locusts, together with dynamic computer simulation, in order to understand how the locusts control the direction and elevation of the jump, the residual angular velocities resulting from the jump and the timing of flapping-flight initiation. Our study confirms and expands early findings regarding the instrumental role of the initial body position and orientation. Both real-jump video analysis and simulations based on our expanded dynamical model demonstrate that the initial body coordinates of position (relative to the hind-legs ground-contact points) are dominant in predicting the jumps’ azimuth and elevation angles. We also report a strong linear correlation between the jumps’ pitch-angular-velocity and flight initiation timing, such that head downwards rotations lead to earlier wing opening. In addition to offering important insights into the bio-mechanical principles of locust jumping and flight initiation, the findings from this study will be used in designing future prototypes of a bio-inspired miniature jumping robot that will be employed in animal behaviour studies and environmental monitoring applications. PMID:27703846

  6. Dynamics and stability of directional jumps in the desert locust

    Directory of Open Access Journals (Sweden)

    Omer Gvirsman

    2016-09-01

    Full Text Available Locusts are known for their ability to jump large distances to avoid predation. The jump also serves to launch the adult locust into the air in order to initiate flight. Various aspects of this important behavior have been studied extensively, from muscle physiology and biomechanics, to the energy storage systems involved in powering the jump, and more. Less well understood are the mechanisms participating in control of the jump trajectory. Here we utilise video monitoring and careful analysis of experimental directional jumps by adult desert locusts, together with dynamic computer simulation, in order to understand how the locusts control the direction and elevation of the jump, the residual angular velocities resulting from the jump and the timing of flapping-flight initiation. Our study confirms and expands early findings regarding the instrumental role of the initial body position and orientation. Both real-jump video analysis and simulations based on our expanded dynamical model demonstrate that the initial body coordinates of position (relative to the hind-legs ground-contact points are dominant in predicting the jumps’ azimuth and elevation angles. We also report a strong linear correlation between the jumps’ pitch-angular-velocity and flight initiation timing, such that head downwards rotations lead to earlier wing opening. In addition to offering important insights into the bio-mechanical principles of locust jumping and flight initiation, the findings from this study will be used in designing future prototypes of a bio-inspired miniature jumping robot that will be employed in animal behaviour studies and environmental monitoring applications.

  7. 日本血吸虫(中国大陆株)Sj16基因的原核表达%PROKARYOTIC EXPRESSION OF Sj16 GENE OF SCHISTOSOMA JAPONICUM CHINESE STRAIN

    Institute of Scientific and Technical Information of China (English)

    卞国武; 余新炳; 吴忠道; 徐劲; 周俊梅; 单志新; 马长玲; 邵筱

    2001-01-01

    目的进一步研究日本血吸虫(中国大陆株)Sj16的免疫调节功能,丰富有关血吸虫免疫逃避知识.方法根据曼氏血吸虫Sm16基因已知序列设计合成一对引物,用PCR技术从日本血吸虫(中国大陆株)成虫cDNA文库中扩增Sj16基因;将Sj16基因定向克隆入pGEX-4T-1,转化感受态BL21/DE3菌;用酶切、PCR扩增鉴定筛选得到的重组阳性克隆.IPTG诱导pGEX-4T-1-Sj16转化的BL21/DE3菌,用SDS-PAGE和Wester-blot分析表达产物.结果从日本血吸虫(中国大陆株)成虫cDNA文库中获取Sj16基因,重组质粒中含有Sj16基因,成功构建日本血吸虫(中国大陆株)Sj16基因原核表达重组质粒pGEX-4T-1-Sj16,pGEX-4T-1-Sj16转化的BL21/DE3菌经IPTG诱导可表达与GST融合的蛋白(约40 kDa),抗GST抗体能特异性识别该蛋白.结论成功原核表达了Sj16蛋白,为深入研究Sj16的免疫调节功能,丰富有关血吸虫免疫逃避知识打下了基础.

  8. Jumping Jupiter can explain Mercury's orbit

    CERN Document Server

    Roig, Fernando; DeSouza, Sandro Ricardo

    2016-01-01

    The orbit of Mercury has large values of eccentricity and inclination that cannot be easily explained if this planet formed on a circular and coplanar orbit. Here, we study the evolution of Mercury's orbit during the instability related to the migration of the giant planets in the framework of the jumping Jupiter model. We found that some instability models are able to produce the correct values of Mercury's eccentricity and inclination, provided that relativistic effects are included in the precession of Mercury's perihelion. The orbital excitation is driven by the fast change of the normal oscillation modes of the system corresponding to the perihelion precession of Jupiter (for the eccentricity), and the nodal regression of Uranus (for the inclination).

  9. The Voter Model and Jump Diffusion

    CERN Document Server

    Majmudar, Jimit; Baumgaertner, Bert O; Tyson, Rebecca C

    2015-01-01

    Opinions, and subsequently opinion dynamics, depend not just on interactions among individuals, but also on external influences such as the mass media. The dependence on local interactions, however, has received considerably more attention. In this paper, we use the classical voter model as a basis, and extend it to include external influences. We show that this new model can be understood using the theory of jump diffusion processes. We derive results pertaining to fixation probability and expected consensus time of the process, and find that the contribution of an external influence significantly dwarfs the contribution of the node-to-node interactions in terms of driving the social network to eventual consensus. This result suggests the potential importance of ``macro-level'' phenomena such as the media influence as compared to the ``micro-level'' local interactions, in modelling opinion dynamics.

  10. CAPTURE OF TROJANS BY JUMPING JUPITER

    Energy Technology Data Exchange (ETDEWEB)

    Nesvorny, David [Department of Space Studies, Southwest Research Institute, 1050 Walnut St., Suite 300, Boulder, CO 80302 (United States); Vokrouhlicky, David [Institute of Astronomy, Charles University, V Holesovickach 2, 180 00 Prague 8 (Czech Republic); Morbidelli, Alessandro [Departement Cassiopee, University of Nice, CNRS, Observatoire de la Cote d' Azur, Nice, F-06304 (France)

    2013-05-01

    Jupiter Trojans are thought to be survivors of a much larger population of planetesimals that existed in the planetary region when planets formed. They can provide important constraints on the mass and properties of the planetesimal disk, and its dispersal during planet migration. Here, we tested a possibility that the Trojans were captured during the early dynamical instability among the outer planets (aka the Nice model), when the semimajor axis of Jupiter was changing as a result of scattering encounters with an ice giant. The capture occurs in this model when Jupiter's orbit and its Lagrange points become radially displaced in a scattering event and fall into a region populated by planetesimals (that previously evolved from their natal transplanetary disk to {approx}5 AU during the instability). Our numerical simulations of the new capture model, hereafter jump capture, satisfactorily reproduce the orbital distribution of the Trojans and their total mass. The jump capture is potentially capable of explaining the observed asymmetry in the number of leading and trailing Trojans. We find that the capture probability is (6-8) Multiplication-Sign 10{sup -7} for each particle in the original transplanetary disk, implying that the disk contained (3-4) Multiplication-Sign 10{sup 7} planetesimals with absolute magnitude H < 9 (corresponding to diameter D = 80 km for a 7% albedo). The disk mass inferred from this work, M{sub disk} {approx} 14-28 M{sub Earth}, is consistent with the mass deduced from recent dynamical simulations of the planetary instability.

  11. Extinction and persistence of a stochastic nonlinear SIS epidemic model with jumps

    Science.gov (United States)

    Ge, Qing; Ji, Guilin; Xu, Jiabo; Fan, Xiaolin

    2016-11-01

    In this paper, Brownian motion and L e ´ vy jumps are introduced to a SIS type epidemic model with nonlinear incidence rate. The dynamical behavior of the considered model is investigated. In order to reveal the extinction and permanence of the disease, two threshold values R˜0 ,R¯0 are showed. We find that if R˜0 1, the disease may be persistent. Finally, the numerical simulations are presented to illustrate our mathematical results.

  12. Contribution of non-extensor muscles of the leg to maximal-effort countermovement jumping

    OpenAIRE

    Yoshioka Shinsuke; Komura Taku; Nagano Akinori; Fukashiro Senshi

    2005-01-01

    Abstract Background The purpose of this study was to determine the effects of non-extensor muscles of the leg (i.e., muscles whose primary function is not leg extension) on the kinematics and kinetics of human maximal-effort countermovement jumping. Although it is difficult to address this type of question through experimental procedures, the methodology of computer simulation can be a powerful tool. Methods A skeletal model that has nine rigid body segments and twenty degrees of freedom was ...

  13. Optimal search in interacting populations:Gaussian jumps vs Levy flights

    OpenAIRE

    Martínez-García, Ricardo; Calabrese, Justin; López, Cristóbal

    2014-01-01

    We investigated the relationships between search efficiency, movement strategy, and nonlocal communication in the biological context of animal foraging. We considered situations where the members of a population of foragers perform either Gaussian jumps or Lévy flights, and show that the search time is minimized when communication among individuals occurs at intermediate ranges, independently of the type of movement. Additionally, while Brownian strategies are more strongly influenced by the ...

  14. Effects of Gender, Load, and Backpack on Easy Standing and Vertical Jump Performance. Volume 2

    Science.gov (United States)

    1982-03-01

    OOVT ACCESSION NO. 3. RECIPIENT’S CATALOO NUMBER «. TITLE (md Subtitl.) VOLUME II, EFFECTS OF GENDER, LOAD, AND BACKPACK ON EASY STANDING AND...worn or carried and the type of backpack used on parameters of the easy standing and vertical jumping performance of men ajnd women. Fourteen men and...3 - combat gear (Load 2 plus PASGT helmet, PASGT armor vest, simulated M16 rifle); Load A - combat gear and 20-lb backpack oo,; JAM 7» 1473

  15. Comparison of telomere length and association with progenitor cell markers in lacrimal gland between Sjögren syndrome and non-Sjögren syndrome dry eye patients.

    Science.gov (United States)

    Kawashima, Motoko; Kawakita, Tetsuya; Maida, Yoshiko; Kamoi, Mizuka; Ogawa, Yoko; Shimmura, Shigeto; Masutomi, Kenkichi; Tsubota, Kazuo

    2011-01-01

    Indicators of aging such as disruption of telomeric function due to shortening may be more frequent in dysfunctional lacrimal gland. The aims of this study were to 1) determine the viability of quantitative fluorescence in situ hybridization of telomeres (telo-FISH) for the assessment of telomere length in lacrimal gland in Sjögren and non- Sjögren syndrome patients; and 2) investigate the relationship between progenitor cell markers and telomere length in both groups. Quantitative fluorescence in situ hybridization with a peptide nucleic acid probe complementary to the telomere repeat sequence was performed on frozen sections from human lacrimal gland tissues. The mean fluorescence intensity of telomere spots was automatically quantified by image analysis as relative telomere length in lacrimal gland epithelial cells. Immunostaining for p63, nucleostemin, ATP-binding cassette, sub-family G, member 2 (ABCG2), and nestin was also performed. Telomere intensity in the Sjögren syndrome group (6,785.0±455) was significantly lower than that in the non-Sjögren syndrome group (7,494.7±477; p=0.02). Among the samples from the non-Sjögren syndrome group, immunostaining revealed that p63 was expressed in 1-3 acinar cells in each acinar unit and continuously in the basal layer of duct cells. In contrast, in the Sjögren syndrome group, p63 and nucleostemin showed a lower level of expression. ABCG2 was expressed in acinar cells in both sjogren and non-Sjogren syndrome. The results of this study indicate that 1) telo-FISH is a viable method of assessing telomere length in lacrimal gland, and 2) telomere length in Sjögren syndrome is shorter and associated with lower levels of expression of p63 and nucleostemin than in non-Sjögren syndrome.

  16. Bronquiectasias associadas à síndrome de Sjögren Bronchiectasis associated to Sjögren syndrome: case report

    Directory of Open Access Journals (Sweden)

    SIMONE APARECIDA CÂMARA TECCHIO

    2000-08-01

    Full Text Available Diversas formas de comprometimento pulmonar têm sido descritas na síndrome de Sjögren, incluindo raros casos em que bronquiectasias foram o achado predominante. Relata-se o caso de uma paciente com história de infecções respiratórias de repetição e dispnéia progressiva de longa evolução, cuja tomografia computadorizada de alta resolução evidenciava inúmeras bronquiectasias. A revisão de uma biópsia pulmonar realizada no início dos sintomas mostrava alterações bronquiolares de natureza inflamatória e fibrótica. Apesar da presença de sintomas de síndrome seca há anos, o diagnóstico de SS foi feito apenas tardiamente. São discutidos os possíveis mecanismos patogenéticos que possam ter levado ao desenvolvimento das bronquiectasias e a necessidade de um apurado senso clínico para o diagnóstico precoce de tais condições.Different kinds of pulmonary impairment have been described in Sjögren syndrome, including rare cases of bronchiectasis. The authors report a female patient with a history of episodes of respiratory infections and progressive breathlessness whose high resolution computerized tomography revealed bronchiectasis. A former open lung biopsy showed bronchiolar inflammatory and fibrotic changes. The diagnosis of Sjögren syndrome was made only late in the evolution, although sicca syndrome symptoms had been present for years. The authors discuss the potential pathogenic mechanisms involved in the development of the bronchiectasis and the need for a high degree of clinical medical skill for the early diagnosis of such conditions.

  17. Hydraulic jumps within pyroclastic density currents and their sedimentary record

    Science.gov (United States)

    Douillet, G.; Mueller, S.; Kueppers, U.; Dingwell, D. B.

    2013-12-01

    This contribution presents a complete and comprehensive formulation of the hydraulic jump phenomenon and reviews sedimentary structures that may be associated with them. Beginning from the general fluid phenomenon, we then focus on examples from pyroclastic density currents in order to infer dynamic parameters on the parent flows. A hydraulic jump is a fluid dynamics phenomenon that corresponds to the sudden increase of the thickness of a flow accompanied by a decrease of its velocity and/or density. A hydraulic jump is the expression of the transition of the flow from two different flow regimes: supercritical to subcritical. This entrains a change in the energy balance between kinetic energy and gravity potential energy. Recently, the terms of 'pneumatic jumps' have been used for similar phenomenon driven within a gas phase, and granular jumps for dense granular flows. It is thought that such strong changes in the flow conditions may leave characteristic structures in the sedimentary record. Indeed, the main variables influencing the sedimentation rate are the flow velocity, particle concentration and turbulence level, all of them strongly affected by a hydraulic jump. Structures deposited by hydraulic/pneumatic jumps have been called cyclic steps and chute and pool structures. Chute and pools represent the record of a single supercritical to subcritical transition, whereas cyclic steps are produced by stable trains of hydraulic jumps and subsequent re-accelerations. Pyroclastic density currents (PDCs) are gas and pyroclasts flows. As such, they can be subjected to granular and pneumatic jumps and their deposit have often been interpreted as containing records of jumps. Steep sided truncations covered by lensoidal layers have been interpreted as the record of internal jumps within density stratified flows. Fines-depleted breccias at breaks in slope are thought to result from the enhanced turbulence at a jump of the entire flow. Sudden increases in thickness of

  18. Characterization of VAMP2 in Schistosoma japonicum and the Evaluation of Protective Efficacy Induced by Recombinant SjVAMP2 in Mice.

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    Qian Han

    Full Text Available The outer-tegument membrane covering the schistosome is believed to maintain via the fusion of membranous vesicles. Fusion of biological membranes is a fundamental process in all eukaryotic cells driven by formation of trans-SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor complexes through pairing of vesicle associated v-SNAREs (VAMP with complementary t-SNAREs on target membranes. The purpose of this study was to characterize Schistosoma japonicum vesicle-associated membrane protein 2 (SjVAMP2 and to investigate its potential as a candidate vaccine against schistosomiasis.The sequence of SjVAMP2 was analyzed, cloned, expressed and characterized. SjVAMP2 is a member of the synaptobrevin superfamily harboring the v-SNARE coiled-coil homology domain. RT-PCR analysis revealed that significantly higher SjVAMP2 levels were observed in 14-, 28- and 42-day-old worms, and SjVAMP2 expression was much higher in 42-day-old female worms than in those male worms. Additionally, the expression of SjVAMP2 was associated with membrane recovery in PZQ-treated worms. Immunostaining assay showed that SjVAMP2 was mainly distributed in the sub-tegument of the worms. Western blotting revealed that rSjVAMP2 showed strong immunogenicity. Purified rSjVAMP2 emulsified with ISA206 adjuvant induced 41.5% and 27.3% reductions in worm burden, and 36.8% and 23.3% reductions in hepatic eggs in two independent trials. Besides, significantly higher rSjVAMP2-specific IgG, IgG1, IgG2a levels were detected in rSjVAMP2-vaccinated mice.Our study indicated that SjVAMP2 is a potential vaccine candidate against S. japonicum and provided the basis for further investigations into the biological function of SjVAMP2.

  19. Role of the IL-12/IL-35 balance in Sjögren's syndrome.

    Science.gov (United States)

    Fogel, Olivier; Rivière, Elodie; Seror, Raphaèle; Nocturne, Gaetane; Boudaoud, Saida; Ly, Bineta; Gottenberg, Jacques-Eric; Le Guern, Véronique; Dubost, Jean-Jacques; Nititham, Joanne; Taylor, Kimberly E; Chanson, Philippe; Dieudé, Philippe; Criswell, Lindsey A; Jagla, Bernd; Thai, Alice; Mingueneau, Michael; Mariette, Xavier; Miceli-Richard, Corinne

    2017-09-12

    An interferon (IFN) signature is involved in the pathogenesis of primary Sjögren's syndrome (pSS), but whether the signature is type 1 or 2 remains controversial. Mouse models and genetic studies suggested the involvement of T helper 1 and type 2 IFN pathways. Likewise, polymorphisms of interleukin 12A gene (IL-12A), which encodes for IL-12p35, have been associated with pSS. IL-12p35 subunit is shared by 2 heterodimers, IL-12 and IL-35. To confirm the genetic association of IL-12A polymorphism and pSS and elucidate the involvement of the IL-12/IL-35 balance in pSS by functional studies. The genetic study involved 673 patients with pSS from 2 French pSS cohorts and 585 healthy French controls. Functional studies were performed on sorted monocytes, stimulated or not. IL-12A mRNA and IL-12 and IL-35 protein levels were assessed by qRT-PCR and by ELISA and a multiplex kit for IL-35 and IL-12, respectively. We confirmed the association of the IL-12A rs485497 polymorphism and pSS and found an increased serum protein level of IL-12p70 in pSS patients carrying the risk allele (p=0.016). Serum level of IL-12p70 was greater in patients than controls (p=0.0001), especially patients with more active disease (p=0.05); conversely IL-35 level was decreased in patients (p=0.0001) especially in patients with a more active disease (p=0.05). In blood cellular subsets, both IL-12p35 and EBI-3 mRNAs were detected only in B cells with a trend toward a lower level among pSS patients. Our findings emphasize the involvement of the IL-12/IL-35 balance in the pathogenesis of pSS. Serum IL-35 level was associated with low disease activity, in contrast to serum IL-12p70 level, which was rather associated with a more active disease. Copyright © 2017. Published by Elsevier Inc.

  20. A COMPARISON OF PAIRS FIGURE SKATERS IN REPEATED JUMPS

    Directory of Open Access Journals (Sweden)

    William A. Sands

    2012-03-01

    Full Text Available Trends in pairs figure skating have shown that increasingly difficult jumps have become an essential aspect of high-level performance, especially in the latter part of a competitive program. We compared a repeated jump power index in a 60 s repeated jump test to determine the relationship of repeated jump test to competitive rank and to measure 2D hip, knee, and ankle angles and angular velocities at 0, 20, 40, and 60 s. Eighteen National Team Pairs Figure Skaters performed a 60 s repeated jump test on a large switch-mat with timing of flight and ground durations and digital video recording. Each 60-s period was divided into 6, 10-s intervals, with power indexes (W/kg calculated for each 10-s interval. Power index by 10-s interval repeated measures ANOVAs (RMANOVA showed that males exceeded females at all intervals, and the highest power index interval was during 10 to 20 s for both sexes. RMANOVAs of angles and angular velocities showed main effects for time only. Power index and jumping techniques among figure skaters showed rapid and steady declines over the test duration. Power index can predict approximately 50% of competitive rank variance, and sex differences in jumping technique were rare

  1. Effects of Foam Rolling on Vertical Jump Performance

    Directory of Open Access Journals (Sweden)

    Andrew Jones

    2015-07-01

    Full Text Available Background: Foam rolling is a popular activity utilized by strength and conditioning coaches as it is believed to increase muscle length and break up fibrous adhesions located in connective tissue. However, there is little research investigating the effects of foam rolling on athletic performance. Objective: The purpose of this study was to investigate the effects of lower body foam rolling on vertical jump performance. Methods: Twenty males (age 24.05 ± 2.02 years; height 177.43 ± 6.31 cm; mass 81.41 ± 8.76 kg volunteered to participate. Subjects completed three days of testing, separated by at least twenty-four hours. Day one consisted of baseline vertical jumps on a force plate, followed by familiarization with foam rolling and control protocols. Subjects returned on days two and three and performed 30-second bouts of lower body foam rolling or mimicked foam rolling movements on a skateboard followed by vertical jumps on a force plate. The highest jump from each day was used for statistical analyses. Results: Repeated measures ANOVAs revealed no significant differences in Jump height, impulse, relative ground reaction force, or take-off velocity between conditions. Conclusion: 30-second bouts of lower body foam rolling do not improve vertical jump performance. Keywords: Dynamic Warm-Up, Foam Rolling, Vertical Jump

  2. Condensed droplet jumping: Capillary to inertial energy transfer

    Science.gov (United States)

    Enright, Ryan; Miljkovic, Nenad; Morris, Michael; Wang, Evelyn

    2013-03-01

    When condensed droplets coalesce on a superhydrophobic nanostructured surface, the resulting droplet can jump from the surface due to the release of excess surface energy. This behavior has been shown to follow a simple inertial-capillary scaling. However, questions remain regarding the nature of the energy conversion process linking the excess surface energy of the system before coalescence and the kinetic energy of the jumping droplet. Furthermore, the primary energy dissipation mechanisms limiting this jumping behavior remain relatively unexplored. In this work, we present new experimental data from a two-camera setup capturing the trajectory of jumping droplets on nanostructured surfaces with a characteristic surface roughness length scale on the order of 10 nm. Coupled with a model developed to capture the main details of the bridging flow during coalescence, our findings suggest that: 1. the excess surface energy available for jumping is a fraction of that suggested by simple scaling due to incomplete energy transfer, 2. internal viscous dissipation is not a limiting factor on the jumping process at droplet sizes on the order of 10 μm and 3. jumping performance is strongly affected by forces associated with the external flow and fields around the droplet. This work suggests bounds on the heat transfer performance of superhydrophobic condensation surfaces.

  3. Aerial jumping in the Trinidadian guppy (Poecilia reticulata).

    Science.gov (United States)

    Soares, Daphne; Bierman, Hilary S

    2013-01-01

    Many fishes are able to jump out of the water and launch themselves into the air. Such behavior has been connected with prey capture, migration and predator avoidance. We found that jumping behavior of the guppy Poecilia reticulata is not associated with any of the above. The fish jump spontaneously, without being triggered by overt sensory cues, is not migratory and does not attempt to capture aerial food items. Here, we use high speed video imaging to analyze the kinematics of the jumping behavior P. reticulata. Fish jump from a still position by slowly backing up while using its pectoral fins, followed by strong body trusts which lead to launching into the air several body lengths. The liftoff phase of the jump is fast and fish will continue with whole body thrusts and tail beats, even when out of the water. This behavior occurs when fish are in a group or in isolation. Geography has had substantial effects on guppy evolution, with waterfalls reducing gene flow and constraining dispersal. We suggest that jumping has evolved in guppies as a behavioral phenotype for dispersal.

  4. Aerial jumping in the Trinidadian guppy (Poecilia reticulata.

    Directory of Open Access Journals (Sweden)

    Daphne Soares

    Full Text Available Many fishes are able to jump out of the water and launch themselves into the air. Such behavior has been connected with prey capture, migration and predator avoidance. We found that jumping behavior of the guppy Poecilia reticulata is not associated with any of the above. The fish jump spontaneously, without being triggered by overt sensory cues, is not migratory and does not attempt to capture aerial food items. Here, we use high speed video imaging to analyze the kinematics of the jumping behavior P. reticulata. Fish jump from a still position by slowly backing up while using its pectoral fins, followed by strong body trusts which lead to launching into the air several body lengths. The liftoff phase of the jump is fast and fish will continue with whole body thrusts and tail beats, even when out of the water. This behavior occurs when fish are in a group or in isolation. Geography has had substantial effects on guppy evolution, with waterfalls reducing gene flow and constraining dispersal. We suggest that jumping has evolved in guppies as a behavioral phenotype for dispersal.

  5. Robust detection scheme on noise and phase jump for phase maps of objects with height discontinuities--theory and experiment.

    Science.gov (United States)

    Weng, Jing-Feng; Lo, Yu-Lung

    2011-02-14

    This paper proposes a robust noise and phase jump detection scheme for noisy phase maps containing height discontinuities. The detection scheme has two primary functions, namely to detect the positions of noise and to locate the positions of the phase jumps. Generally speaking, the removal of noise from a wrapped phase map causes a smearing of the phase jumps and therefore leads to a loss of definition in the unwrapped phase map. However, in the proposed scheme, the boundaries of the phase jump regions are preserved during the noise detection process. The validity of the proposed approach is demonstrated using the simulated and experimental wrapped phase maps of a 3D object containing height discontinuities, respectively. It is shown that the noise and phase jump detection scheme enables the precise and efficient detection of three different types of noise, namely speckle noise, residual noise, and noise at the lateral surfaces of the height discontinuities. Therefore, the proposed scheme represents an ideal solution for the pre-processing of noisy wrapped phase maps prior to their treatment using a filtering algorithm and phase unwrapping algorithm.

  6. Rectal mucosal prolapse syndrome as an unusual gastrointestinal manifestation of Sjögren's syndrome: a case report

    Directory of Open Access Journals (Sweden)

    Koga Hideki

    2009-10-01

    Full Text Available Abstract Introduction Rectal mucosal prolapse syndrome, histologically characterized by fibromuscular obliteration in the lamina propria, hyperplastic glands and thickened muscularis mucosa, causes rectal bleeding. Sjögren's syndrome is an autoimmune exocrinopathy that chiefly destroys the salivary and lacrimal glands by lympho-plasmacytic infiltration. Although various gastrointestinal manifestations have been reported in patients with Sjögren's syndrome, there have not been to our knowledge any case reports to date of rectal mucosal prolapse syndrome in association with Sjögren's syndrome. Case presentation A 68-year-old Japanese woman with Sjögren's syndrome and long-term constipation consulted our hospital because of rectal bleeding. Because of dysphagia and xerostomia, she had consistently refused recommendations to take oral medicines including cathartics. Therefore, she frequently strained excessively during defecation. Colonoscopy and radiological examinations disclosed eroded flat protrusions of the rectum. Microscopic examination demonstrated inflamed mucosa with elongated tortuous glands and fibromuscular obliteration. Based on these findings, a diagnosis of rectal mucosal prolapse syndrome was made. Prohibition of straining during defecation and sulfasalazine suppository use were effective. Conclusion This case highlights the importance of defecation control in patients with Sjögren's syndrome. In the case presented, rectal mucosal prolapse syndrome following long-term excessive straining during defecation caused rectal bleeding. Clinicians should consider rectal mucosal prolapse syndrome as a gastrointestinal manifestation of Sjögren's syndrome.

  7. Health-Related Physical Fitness in Healthy Untrained Men: Effects on VO2max, Jump Performance and Flexibility of Soccer and Moderate-Intensity Continuous Running.

    Directory of Open Access Journals (Sweden)

    Zoran Milanović

    Full Text Available The purpose of this study was to determine the effects of recreational soccer (SOC compared to moderate-intensity continuous running (RUN on all health-related physical fitness components in healthy untrained men. Sixty-nine participants were recruited and randomly assigned to one of three groups, of which sixty-four completed the study: a soccer training group (SOC; n = 20, 34±4 (means±SD years, 78.1±8.3 kg, 179±4 cm; a running group (RUN; n = 21, 32±4 years, 78.0±5.5 kg, 179±7 cm; or a passive control group (CON; n = 23, 30±3 years, 76.6±12.0 kg, 178±8 cm. The training intervention lasted 12 weeks and consisted of three 60-min sessions per week. All participants were tested for each of the following physical fitness components: maximal aerobic power, minute ventilation, maximal heart rate, squat jump (SJ, countermovement jump with arm swing (CMJ, sit-and-reach flexibility, and body composition. Over the 12 weeks, VO2max relative to body weight increased more (p<0.05 in SOC (24.2%, ES = 1.20 and RUN (21.5%, ES = 1.17 than in CON (-5.0%, ES = -0.24, partly due to large changes in body mass (-5.9, -5.7 and +2.6 kg, p<0.05 for SOC, RUN and CON, respectively. Over the 12 weeks, SJ and CMJ performance increased more (p<0.05 in SOC (14.8 and 12.1%, ES = 1.08 and 0.81 than in RUN (3.3 and 3.0%, ES = 0.23 and 0.19 and CON (0.3 and 0.2%, while flexibility also increased more (p<0.05 in SOC (94%, ES = 0.97 than in RUN and CON (0-2%. In conclusion, untrained men displayed marked improvements in maximal aerobic power after 12 weeks of soccer training and moderate-intensity running, partly due to large decreases in body mass. Additionally soccer training induced pronounced positive effects on jump performance and flexibility, making soccer an effective broad-spectrum fitness training intervention.

  8. Bilateral Pleural Effusions as an Initial Presentation in Primary Sjögren's Syndrome

    Science.gov (United States)

    Makimoto, Go; Asano, Michiko; Fujimoto, Nobukazu; Fuchimoto, Yasuko; Ono, Katsuichiro; Ozaki, Shinji; Taguchi, Koji; Kishimoto, Takumi

    2012-01-01

    Sjögren's syndrome (SS) is a systemic autoimmune disease characterized by sicca symptoms. Interstitial pulmonary fibrosis and tracheobronchial sicca are the most common symptoms of pulmonary involvement in primary SjS, and they are rarely accompanied by serositis such as pleuritis or pericarditis. We report a case of SS presenting initially with bilateral pleural effusions. A 63-year old man was admitted to our hospital with a one-month history of cough, dyspnea, and right chest pain. Chest-computed tomography revealed bilateral pleural effusions. Serum anti-SS-A antibody titer was 1 : 256. Ophthalmological examination revealed a positive Schirmer test. Lip biopsy showed atrophy and plasmacytic infiltration of the salivary gland. Corticosteroid treatment was initiated. Pleural effusions were almost completely resolved by day 30. The patient has not experienced any recurrence. PMID:23198246

  9. The Sjögren’s syndrome – an interdisciplinary problem viewed by a dentist

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    Agata Barczyk

    2014-11-01

    Full Text Available Sjögren’s syndrome is common and chronic disease. So far there is no effective therapy. In 90% of cases, it affects women, usually in the peri-menopausal period. Many systems and organs may be involved in the course of the disease, thus it is interesting for many medical specialists. There are primary and secondary Sjögren’s syndromes, both characterized mainly by xerostomia and keratoconjunctivitis. The paper reviews basic symptoms in the oral cavity involving the oral mucosa, lips, tongue, gingiva, teeth and periodontium. Treatment and prevention in a dental clinic are also described. Lifestyle and pharmacotherapy to avoid symptom aggravation are additionally considered.

  10. Bilateral Pleural Effusions as an Initial Presentation in Primary Sjögren’s Syndrome

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    Go Makimoto

    2012-01-01

    Full Text Available Sjögren’s syndrome (SS is a systemic autoimmune disease characterized by sicca symptoms. Interstitial pulmonary fibrosis and tracheobronchial sicca are the most common symptoms of pulmonary involvement in primary SjS, and they are rarely accompanied by serositis such as pleuritis or pericarditis. We report a case of SS presenting initially with bilateral pleural effusions. A 63-year old man was admitted to our hospital with a one-month history of cough, dyspnea, and right chest pain. Chest-computed tomography revealed bilateral pleural effusions. Serum anti-SS-A antibody titer was 1 : 256. Ophthalmological examination revealed a positive Schirmer test. Lip biopsy showed atrophy and plasmacytic infiltration of the salivary gland. Corticosteroid treatment was initiated. Pleural effusions were almost completely resolved by day 30. The patient has not experienced any recurrence.

  11. Undiagnosed Sjögren’s Syndrome Presenting as Mesenteric Panniculitis

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    Rebecca L. Burns

    2016-01-01

    Full Text Available Mesenteric panniculitis is a rare inflammatory and fibrotic process that affects the small intestine mesentery. It may occur following abdominal surgery or in association with a variety of conditions, including malignancy, infection, and certain autoimmune and inflammatory conditions. Herein, an unusual case of mesenteric panniculitis in a patient with primary Sjögren’s syndrome will be presented. The patient presented with abdominal pain, weight loss, sicca symptoms, fatigue, and arthralgia. An abdominal CT revealed mesenteric fat stranding and prominent lymph nodes of the small intestine mesentery. She was found on laboratory workup to have positive antinuclear and anti-SSa antibodies. Minor salivary gland lip biopsy revealed focal lymphocytic sialadenitis. The patient’s symptoms and CT findings improved with corticosteroids. This case suggests that Sjögren’s syndrome should be considered as an underlying disease process in the evaluation of patients with mesenteric panniculitis.

  12. CTG trinucleotide repeat "big jumps": large expansions, small mice.

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    Mário Gomes-Pereira

    2007-04-01

    Full Text Available Trinucleotide repeat expansions are the genetic cause of numerous human diseases, including fragile X mental retardation, Huntington disease, and myotonic dystrophy type 1. Disease severity and age of onset are critically linked to expansion size. Previous mouse models of repeat instability have not recreated large intergenerational expansions ("big jumps", observed when the repeat is transmitted from one generation to the next, and have never attained the very large tract lengths possible in humans. Here, we describe dramatic intergenerational CTG*CAG repeat expansions of several hundred repeats in a transgenic mouse model of myotonic dystrophy type 1, resulting in increasingly severe phenotypic and molecular abnormalities. Homozygous mice carrying over 700 trinucleotide repeats on both alleles display severely reduced body size and splicing abnormalities, notably in the central nervous system. Our findings demonstrate that large intergenerational trinucleotide repeat expansions can be recreated in mice, and endorse the use of transgenic mouse models to refine our understanding of triplet repeat expansion and the resulting pathogenesis.

  13. Jumping numbers and ordered tree structures on the dual graph

    CERN Document Server

    Hyry, Eero

    2010-01-01

    Let R be a two-dimensional regular local ring having an algebraically closed residue field and let a be a complete ideal of finite colength in R. In this article we investigate the jumping numbers of a by means of the dual graph of the minimal log resolution of the pair (X,a). Our main result is a combinatorial criterium for a positive rational number to be a jumping number. In particular, we associate to each jumping number certain ordered tree structures on the dual graph.

  14. Nonstandard analysis and jump conditions for converging shock waves

    Science.gov (United States)

    Baty, Roy S.; Farassat, F.; Tucker, Don H.

    2008-06-01

    Nonstandard analysis is an area of modern mathematics that studies abstract number systems containing both infinitesimal and infinite numbers. This article applies nonstandard analysis to derive jump conditions for one-dimensional, converging shock waves in a compressible, inviscid, perfect gas. It is assumed that the shock thickness occurs on an infinitesimal interval and the jump functions in the thermodynamic and fluid dynamic parameters occur smoothly across this interval. Predistributions of the Heaviside function and the Dirac delta measure are introduced to model the flow parameters across a shock wave. The equations of motion expressed in nonconservative form are then applied to derive unambiguous relationships between the jump functions for the flow parameters.

  15. Stochastic mutualism model with Lévy jumps

    Science.gov (United States)

    Liu, Qun; Jiang, Daqing; Shi, Ningzhong; Hayat, Tasawar; Alsaedi, Ahmed

    2017-02-01

    In this paper, we consider a stochastic mutualism model with Lévy jumps. First of all, we show that the positive solution of the system is stochastically ultimate bounded. Then under a simple assumption, we establish sufficient and necessary conditions for the stochastic permanence and extinction of the system. The results show an important property of the Lévy jumps: they are unfavorable for the permanence of the species. Moreover, when there are no Lévy jumps, we show that there is a unique ergodic stationary distribution of the corresponding system under certain conditions. Some numerical simulations are introduced to validate the theoretical results.

  16. RESEARCH ON JUMPING SEQUENCE PLANNING ISSUES OF HOPPING ROBOTS

    Institute of Scientific and Technical Information of China (English)

    LIUZhuang-zhi; ZHUJian-ying

    2004-01-01

    The wheeled or crawled robots often suffer from big obstacles or ditches, so a hopping robot needs to fit the tough landform in the field environments. In order to jump over obstacles rapidly, a jumping sequence must be generated based on the landform information from sensors or user input. The planning method for planar mobile robots is compared with that of hopping robots. Several factors can change the planning result. Adjusting these coefficients, a heuristic searching algorithm for the jumping sequence is developed on a simplified landform. Calculational result indicates that the algorithm can achieve safety and efficient control sequences for a desired goal.

  17. Jump-Down Performance Alterations after Space Flight

    Science.gov (United States)

    Reschke, M. F.; Kofman, I. S.; Cerisano, J. M.; Fisher, E. A.; Peters, B. T.; Miller, C. A.; Harm, D. L.; Bloomberg, J. J.

    2011-01-01

    INTRODUCTION: Successful jump performance requires functional coordination of visual, vestibular, and somatosensory systems, which are affected by prolonged exposure to microgravity. Astronauts returning from space flight exhibit impaired ability to coordinate effective landing strategies when jumping from a platform to the ground. This study compares jump strategies used by astronauts before and after flight, changes to those strategies within a test session, and recoveries in jump-down performance parameters across several postflight test sessions. These data were obtained as part of an ongoing interdisciplinary study (Functional Task Test, FTT) designed to evaluate both astronaut postflight functional performance and related physiological changes. METHODS: Seven astronauts from short-duration (Shuttle) and three from long-duration (International Space Station) flights performed 3 two-footed jumps from a platform 30 cm high onto a force plate that measured the ground reaction forces and center-of-pressure displacement from the landings. Neuromuscular activation data were collected from the medial gastrocnemius and anterior tibialis of both legs using surface electromyography electrodes. Two load cells in the platform measured the load exerted by each foot during the takeoff phase of the jump. Data were collected in 2 preflight sessions, on landing day (Shuttle only), and 1, 6, and 30 days after flight. RESULTS: Postural settling time was significantly increased on the first postflight test session and many of the astronauts tested were unable to maintain balance on their first jump landing but recovered by the third jump, showing a learning progression in which performance improvements could be attributed to adjustments in takeoff or landing strategy. Jump strategy changes were evident in reduced air time (time between takeoff and landing) and also in increased asymmetry in foot latencies on takeoff. CONCLUSIONS: The test results revealed significant decrements

  18. Detection of weak frequency jumps for GNSS onboard clocks.

    Science.gov (United States)

    Huang, Xinming; Gong, Hang; Ou, Gang

    2014-05-01

    In this paper, a weak frequency jump detection method is developed for onboard clocks in global navigation satellite systems (GNSS). A Kalman filter is employed to facilitate the onboard real-time processing of atomic clock measurements, whose N-step prediction residuals are used to construct the weak frequency jump detector. Numerical simulations show that the method can successfully detect weak frequency jumps. The detection method proposed in this paper is helpful for autonomous integrity monitoring of GNSS satellite clocks, and can also be applied to other frequency anomalies with an appropriately modified detector.

  19. Jump diffusion models and the evolution of financial prices

    Science.gov (United States)

    Figueiredo, Annibal; de Castro, Marcio T.; da Silva, Sergio; Gleria, Iram

    2011-08-01

    We analyze a stochastic model to describe the evolution of financial prices. We consider the stochastic term as a sum of the Wiener noise and a jump process. We point to the effects of the jumps on the return time evolution, a central concern of the econophysics literature. The presence of jumps suggests that the process can be described by an infinitely divisible characteristic function belonging to the De Finetti class. We then extend the De Finetti functions to a generalized nonlinear model and show the model to be capable of explaining return behavior.

  20. Asymptotic Distribution of the Jump Change-Point Estimator

    Institute of Scientific and Technical Information of China (English)

    Changchun TAN; Huifang NIU; Baiqi MIAO

    2012-01-01

    The asymptotic distribution of the change-point estimator in a jump changepoint model is considered.For the jump change-point model Xi =a + θI{[nTo] < i ≤n} + εi,where εi (i =1,…,n) are independent identically distributed random variables with Eεi=0 and Var(εi) < oo,with the help of the slip window method,the asymptotic distribution of the jump change-point estimator (T) is studied under the condition of the local alternative hypothesis.

  1. Quantum jumps induced by matter-wave fluctuations

    CERN Document Server

    Torres, J M; Zippilli, S; Morigi, G

    2010-01-01

    We theoretically study the occurrence of quantum jumps in the resonance fluorescence of a trapped atom. Here, the atom is laser cooled in a configuration of level such that the occurrence of a quantum jump is associated to a change of the vibrational center-of-mass motion by one phonon. The statistics of the occurrence of the dark fluorescence period is studied as a function of the physical parameters and the corresponding features in the spectrum of resonance fluorescence are identified. We discuss the information which can be extracted on the atomic motion from the observation of a quantum jump in the considered setup.

  2. Rate Theory for Correlated Processes: Double Jumps in Adatom Diffusion

    DEFF Research Database (Denmark)

    Jacobsen, J.; Jacobsen, Karsten Wedel; Sethna, J.

    1997-01-01

    We study the rate of activated motion over multiple barriers, in particular the correlated double jump of an adatom diffusing on a missing-row reconstructed platinum (110) surface. We develop a transition path theory, showing that the activation energy is given by the minimum-energy trajectory...... which succeeds in the double jump. We explicitly calculate this trajectory within an effective-medium molecular dynamics simulation. A cusp in the acceptance region leads to a root T prefactor for the activated rate of double jumps. Theory and numerical results agree....

  3. 具有部分n+浮空埋层的高压SJ-LDMO S器件新结构%A new high-voltage SJ-LDMOS with partial n+-floating layer

    Institute of Scientific and Technical Information of China (English)

    朱辉; 李琦; 黄远豪

    2014-01-01

    In order to suppress the substrate-assisted depleted (SAD)effect and obtain high breakdown voltage in the super j unction device,a new high-voltage SJ-LDMOS with partial n+-floating layer is introduced.The electric field is more uni-formity distribution in the partial n+-floating SJ-LDMOS than those in the conventional SJ-LDMOS,which causes n+-float-ing equipotential buried layer to redistribute the bulk electric field.The proposed SJ-LDMOS transistor with partial n+-floating layer is analyzed and compared with the conventional SJ-LDMOS by 3D numerical simulations.The results indicate that the proposed structure can significantly improve breakdown voltage from 138 V up to 302 V and reduce on-resistance from 16.8 mΩ·cm2 down to 5.8 mΩ·cm2 .A relative ideal low on-resistance high-voltage power device is obtained.%为了抑制衬底辅助耗尽(SAD)效应并提高超结器件击穿电压,提出一种具有部分 n+浮空层 SJ-LDMOS 新结构。n+浮空等位埋层能够调制器件横向电场,使得 partial n+-floating SJ-LDMOS比传统 SJ-LDMOS 具有更加均匀的电场分布。通过三维仿真软件对新器件结构分析,与传统 SJ-LDMOS进行比较。仿真结果表明,具有部分 n+浮空层 SJ-LDMOS结构的器件能将器件的击穿电压从138 V提高到302 V,且比导通电阻也从33.6 mΩ·cm2降低到11.6 mΩ·cm2,获得一个较为理想的低导通电阻高压功率器件。

  4. Frontal fibrosing alopecia in association with Sjögren's syndrome: more than a simple coincidence*

    Science.gov (United States)

    Furlan, Karina Colossi; Kakizaki, Priscila; Chartuni, Juliana Cabral Nunes; Valente, Neusa Yuriko Sakai

    2016-01-01

    Frontal fibrosing alopecia is a distinctive form of scarring alopecia considered to be a clinical variant of lichen planopilaris. It predominantly occurs in postmenopausal women and has a slowly progressive course. It was first described by Kossard in 1994. Since then the number of reported cases has increased significantly. Coexistence of frontal fibrosing alopecia and autoimmune disorders - such as discoid erythematosus lupus and Sjögren's syndrome - may suggest a common pathogenic background among the diseases.

  5. Serologic features of primary Sjögren’s syndrome: clinical and prognostic correlation

    Science.gov (United States)

    García-Carrasco, Mario; Mendoza-Pinto, Claudia; Jiménez-Hernández, César; Jiménez-Hernández, Mario; Nava-Zavala, Arnulfo; Riebeling, Carlos

    2013-01-01

    Sjögren’s syndrome (SS) is a chronic inflammatory systemic autoimmune disease. The disease spectrum extends from sicca syndrome to systemic involvement and extraglandular manifestations, and SS may be associated with malignancies, especially non-Hodgkin’s lymphoma. Patients with SS present a broad spectrum of serologic features. Certain serological findings are highly correlated with specific clinical features, and can be used as prognostic markers. PMID:23525186

  6. Multiple Mesenteric Panniculitis as a Complication of Sjögren's Syndrome Leading to Ileus.

    Science.gov (United States)

    Kakimoto, Kazuki; Inoue, Takuya; Toshina, Ken; Yorifuji, Naoki; Iguchi, Munetaka; Fujiwara, Kaori; Kojima, Yuichi; Okada, Toshihiko; Nouda, Sadaharu; Kawakami, Ken; Abe, Yosuke; Takeuchi, Toshihisa; Egashira, Yutaro; Higuchi, Kazuhide

    2016-01-01

    Mesenteric panniculitis (MP) is a benign fibroinflammatory process characterized by the presence of fat necrosis, chronic inflammation and fibrosis in the mesentery. Although various causal factors, such as malignancy, chronic inflammatory conditions and autoimmune processes, have been identified, the precise etiology remains unknown. We herein report a rare case of MP accompanying Sjögren's syndrome in which a mass lesion and intestinal stenosis were observed simultaneously. This condition led to ileus, which was effectively treated using prednisolone.

  7. Lymphoplasmacytoid lymphoma elaborating lambda chain paraprotein with amyloid deposition in Sjögren's syndrome.

    OpenAIRE

    Savage, A. W.; Shareef, D. S.; Maher, E. J.; Bennett, M. H.; Thomas, D J

    1989-01-01

    A woman presented with painful enlargement of her parotid and submandibular glands. She was shown to have the previously unreported combination of idiopathic thrombocytopenic purpura, Sjögren's syndrome, Hashimoto's disease, and myasthenia gravis. Parotid gland biopsy and bone marrow examination showed the presence of a rare lymphoplasmacytoid lymphoma. There was amyloid deposition in the parotid glands, gums and on muscle biopsy. Immunohistochemical staining of the parotid lymphoma and amylo...

  8. Aeromechanics of the Spider Cricket Jump: How to Jump 60+ Times Your Body Length and Still Land on Your Feet

    Science.gov (United States)

    Palmer, Emily; Deshler, Nicolas; Gorman, David; Neves, Catarina; Mittal, Rajat

    2015-11-01

    Flapping, gliding, running, crawling and swimming have all been studied extensively in the past and have served as a source of inspiration for engineering designs. In the current project, we explore a mode of locomotion that straddles ground and air: jumping. The subject of our study is among the most proficient of long-jumpers in Nature: the spider cricket of the family Rhaphidophoridae, which can jump more than 60 times its body length. Despite jumping this immense distance, these crickets usually land on their feet, indicating an ability to control their posture during ``flight.'' We employ high-speed videogrammetry, to examine the jumps and to track the crickets' posture and appendage orientation throughout their jumps. Simple aerodynamic models are developed to predict the aerodynamic forces and moment on the crickets during `flight`. The analysis shows that these wingless insects employ carefully controlled and coordinated positioning of the limbs during flight so as to increase jump distance and to stabilize body posture during flight. The principles distilled from this study could serve as an inspiration for small jumping robots that can traverse complex terrains.

  9. Áhættuhegðun barna og unglinga á Internetinu : sjálfskaðandi- og sjálfsvígshegðun

    OpenAIRE

    Þóra Bryndís Másdóttir 1990

    2016-01-01

    Internetið leikur stórt hlutverk í lífi ungmenna og hefur notkun þeirra og aðgengi breyst töluvert síðastliðin ár. Auðvelt er að komast þar í kynni við efni um sjálfskaðandi- og sjálfsvígshegðun en það hefur ýmis áhrif á þau, bæði jákvæð og neikvæð. Ákveðið áhyggjuefni þykir að hver sem er, á hvaða aldri sem er geti auðveldlega nálgast efni af þessu tagi og benda fyrri rannsóknir til þess að ákveðnir þættir hafi áhrif á það hvort að þau komist í kynni við slíkt efni á Internetinu. Því var mar...

  10. Study on An Absolute Non-Collision Hash and Jumping Table IP Classification Algorithms

    Institute of Scientific and Technical Information of China (English)

    SHANG Feng-jun; PAN Ying-jun

    2004-01-01

    In order to classify packet, we propose a novel IP classification based the non-collision hash and jumping table Trie-tree (NHJTTT) algorithm, which is based on non-collision hash Trie-tree and Lakshman and Stiliadis proposing a 2-dimensional classification algorithm (LS algorithm).The core of algorithm consists of two parts: structure the non-collision hash function, which is constructed mainly based on destination /source port and protocol type field so that the hash function can avoid space explosion problem; introduce jumping table Trie-tree based LS algorithm in order to reduce time complexity.The test results show that the classification rate of NHJTTT algorithm is up to 1 million packets per second and the maximum memory consumed is 9 MB for 10 000 rules.

  11. Discontinuous Lyapunov approach to state estimation and filtering of jumped systems with sampled-data.

    Science.gov (United States)

    Liu, Xiaoyang; Yu, Wenwu; Cao, Jinde; Chen, Shun

    2015-08-01

    This paper is concerned with the sampled-data state estimation and H(∞) filtering for a class of Markovian jump systems with the discontinuous Lyapunov approach. The system measurements are sampled and then transmitted to the estimator and filter in order to estimate the state of the jumped system under consideration. The corresponding error dynamics is represented by a system with two types of delays: one is from the system itself, and the other from the sampling period. As the delay due to sampling is discontinuous, a corresponding discontinuous Lyapunov functional is constructed, and sufficient conditions are established so as to guarantee both the asymptotic mean-square stability and the H(∞) performance for the filtering error systems. The explicit expressions of the desired estimator and filter are further provided. Finally, two simulation examples are given to illustrate the design procedures and performances of the proposed method.

  12. Multilevel preconditioners for discontinuous, Galerkin approximations of elliptic problems, with jump coefficients

    KAUST Repository

    Ayuso Dios, Blanca

    2013-10-30

    We introduce and analyze two-level and multilevel preconditioners for a family of Interior Penalty (IP) discontinuous Galerkin (DG) discretizations of second order elliptic problems with large jumps in the diffusion coefficient. Our approach to IPDG-type methods is based on a splitting of the DG space into two components that are orthogonal in the energy inner product naturally induced by the methods. As a result, the methods and their analysis depend in a crucial way on the diffusion coefficient of the problem. The analysis of the proposed preconditioners is presented for both symmetric and non-symmetric IP schemes; dealing simultaneously with the jump in the diffusion coefficient and the non-nested character of the relevant discrete spaces presents additional difficulties in the analysis, which precludes a simple extension of existing results. However, we are able to establish robustness (with respect to the diffusion coefficient) and near-optimality (up to a logarithmic term depending on the mesh size) for both two-level and BPX-type preconditioners, by using a more refined Conjugate Gradient theory. Useful by-products of the analysis are the supporting results on the construction and analysis of simple, efficient and robust two-level and multilevel preconditioners for non-conforming Crouzeix-Raviart discretizations of elliptic problems with jump coefficients. Following the analysis, we present a sequence of detailed numerical results which verify the theory and illustrate the performance of the methods. © 2013 American Mathematical Society.

  13. [Coexistence of sarcoidosis and primary Sjögren syndrome: a clinical analysis and literature review].

    Science.gov (United States)

    Song, X Y; Huang, H; Liu, Y Z; Zhao, Y Y; Li, S; Xu, Z J

    2017-05-01

    Four patients with coexistence of sarcoidosis and primary Sjögren syndrome (pSS) were retrospectively analyzed.All patients were female, who were referred to our department mainly because of respiratory symptoms.Positive antinuclear antibody(ANA) was detected in 2 patients and anti-Sjögrens syndrome A (SSA) antibody positive in 1 patient.All patients presented specific histologic patterns of both sarcoidosis and pSS.Publications related to coexistence of these two diseases were reviewed.Forty-one patients were finally included in the analysis, among whom 37 confirmed patients were from literature search.There were 37 women and 4 men.The main clinical features presentation were xerophthalmia in 40, xerostomia in 38, hilaradenopathies in 28, interstitial lung disease in 15, respiratory symptoms in 13.The main immunologic data were positive ANA in 23, SSA antibody in 19, anti-Sjögrens syndrome B antibody in 10 and rheumatoid factor in 12.All patients presented specific histologic patterns of both diseases.Patients with both sarcoidosis and pSS of ten represent multisystemic involvement and positive immunologic parameters, as well as the dual expression of specific histologic characteristics.

  14. GBA2 Mutations Cause a Marinesco-Sjögren-Like Syndrome: Genetic and Biochemical Studies

    Science.gov (United States)

    Haugarvoll, Kristoffer; Johansson, Stefan; Rodriguez, Carlos E.; Boman, Helge; Haukanes, Bjørn Ivar; Bruland, Ove; Roque, Francisco; Jonassen, Inge; Blomqvist, Maria; Telstad, Wenche; Månsson, Jan-Eric

    2017-01-01

    Background With the advent new sequencing technologies, we now have the tools to understand the phenotypic diversity and the common occurrence of phenocopies. We used these techniques to investigate two Norwegian families with an autosomal recessive cerebellar ataxia with cataracts and mental retardation. Methods and Results Single nucleotide polymorphism (SNP) chip analysis followed by Exome sequencing identified a 2 bp homozygous deletion in GBA2 in both families, c.1528_1529del [p.Met510Valfs*17]. Furthermore, we report the biochemical characterization of GBA2 in these patients. Our studies show that a reduced activity of GBA2 is sufficient to elevate the levels of glucosylceramide to similar levels as seen in Gaucher disease. Furthermore, leucocytes seem to be the proper enzyme source for in vitro analysis of GBA2 activity. Conclusions We report GBA2 mutations causing a Marinesco-Sjögren-like syndrome in two Norwegian families. One of the families was originally diagnosed with Marinesco-Sjögren syndrome based on an autosomal recessive cerebellar ataxia with cataracts and mental retardation. Our findings highlight the phenotypic variability associated with GBA2 mutations, and suggest that patients with Marinesco-Sjögren-like syndromes should be tested for mutations in this gene. PMID:28052128

  15. [A case of Sjögren's syndrome associated with EDTA-dependent pseudothrombocytopenia].

    Science.gov (United States)

    Hosokawa, T; Hinoda, Y; Imai, K

    1997-04-01

    A 69-year-old woman was admitted to Department of Orthopedic Surgery in our hospital because of lumbago on April 4, 1995. Since laboratory data showed thrombocytopenia (platelet count 2.1 x 10(4)/mm3) on admission, she was transferred to Department of Internal Medicine for further examination on April 11. She noticed abnormal taste and showed remarkable sicca symptoms. Schirmer test, gum test and electrogustometry were positive, and parotid sialogram findings and histology of minor salivary glands of the lip were compatible with those of typical Sjögren's syndrome. Thus, she was diagnosed as Sjögren's syndrome. Although the antibodies to SS-A/SS-B were negative in her serum, anti-nuclear and anti-centromere antibodies were strongly positive (x1280). Serum IgM level was increased. The decreased platelet count was observed when EDTA was used as anticoagulant. The binding activity of the anti-platelet antibody activated by EDTA was dependent on temperature. Its immunoglobulin class was shown to be IgM by enzyme-labelled antibody method. We here report a case of Sjögren's syndrome associated with EDTA-dependent pseudothrombocytopenia.

  16. Botulinum Toxin for the Management of Sjögren Syndrome-Associated Recurrent Parotitis.

    Science.gov (United States)

    O'Neil, Luke M; Palme, Carsten E; Riffat, Faruque; Mahant, Neil

    2016-12-01

    Recurrent parotitis is a rare manifestation of Sjögren syndrome. The management of recurrent parotitis is challenging because conservative methods may be of limited efficacy and invasive approaches carry the risk of complications. Botulinum toxin has been shown to reduce salivary flow, and consequently, the results of its use in the management of recurrent parotitis have been encouraging. A 65-year-old female patient with recurrent parotitis due to Sjögren syndrome was referred to us, complaining of weekly bouts of inflammation. She required a course of antibiotics monthly to control bacterial superinfections. We treated her with onabotulinumtoxinA injections into both parotid glands at regular intervals. After her second injection cycle, she denied further inflammatory bouts, has not required antibiotics in more than 36 months, and denied any side effects. Botulinum toxin may be a safe and effective method of treating Sjögren syndrome-associated recurrent parotitis. Copyright © 2016 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.

  17. Histoplasmosis diseminada, linfopenia, y síndrome de Sjögren

    Directory of Open Access Journals (Sweden)

    Horacio F. Rodrigo

    2012-10-01

    Full Text Available El síndrome de Sjögren es una enfermedad autoinmune caracterizada por disminución de las secreciones de las glándulas exocrinas; puede presentar también diversas alteraciones hemáticas, entre ellas linfopenia. Presentamos el caso de un varón de 28 años que consultó por cefalea de un mes de evolución a la que se agregaron en las últimas 48 horas vómitos y fiebre. Presentaba lesiones en piel de tronco y cara; no tenía rigidez de nuca. Se demostró infección por Histoplasma capsulatum var. capsulatum en piel y líquido cefalorraquídeo, linfopenia, anticuerpos anti Ro-SSA positivos, baja concentración del trazador en centellograma de glándulas salivales e infiltración linfocitaria en glándulas salivales, lo que permitió confirmar al diagnóstico de síndrome de Sjögren. El tratamiento con anfotericina liposomal e itraconazol mejoró el cuadro clínico. Comunicamos este caso para referir que una infección oportunista, como la histoplasmosis diseminada, puede ser una forma poco común de presentación del síndrome de Sjögren.

  18. Primary Biliary Cirrhosis and Primary Sjögren's Syndrome: Insights for the Stomatologist

    Directory of Open Access Journals (Sweden)

    Liliane Lins

    2014-08-01

    Full Text Available Primary biliary cirrhosis (PBC is a chronic progressive autoimmune disease characterized by portal inflammation and immune-mediated destruction of the intrahepatic bile ducts. Primary Sjögren's syndrome is an autoimmune disease characterized by lymphocytic infiltration of exocrine glands, mainly the lachrymal and salivary glands, in the absence of other definitively diagnosed rheumatologic disease. We report a diagnosed case of primary Sjögren's syndrome associated with PBC. A 59-year-old Caucasian woman went to oral evaluation reporting dry mouth, difficulty in eating associated with burning mouth syndrome, dysgeusia and dysphagia. Intraoral examination revealed extensive cervical caries, gingivitis, gingival retraction, angular cheilitis and atrophic tongue. Hyposalivation was detected by salivary flow and Schirmer's test was positive. Antinuclear and antimitochondrial antibodies were both positive. Anti-Ro/SSA and anti-La/SSB antibodies were negative. A minor salivary gland biopsy of the lower lip was performed. Histopathologic analysis revealed lymphocytic infiltrate with destruction of salivary gland architecture in some areas and replacement of glandular tissues by mononuclear cells. Optimal management of PBC associated with Sjögren's syndrome requires a multidisciplinary approach as the key to optimal patient care. Dental practitioners should be able to recognize the clinical features of this associated condition. Appropriate dental care may prevent tooth decay, periodontal disease and oral infections as well as improve the patient's quality of life.

  19. Rapidly Developed Multiple Face and Neck Skin Cancers in a Patient with Sjögren’s Syndrome: A Case Report

    Science.gov (United States)

    Teh, Lean San; Lai, Ji-Ching; Lian, Je Chuan

    2017-01-01

    Patient: Male, 76 Final Diagnosis: Skin cancer Symptoms: Skin Medication: — Clinical Procedure: — Specialty: Surgery Objective: Unknown ethiology Background: Sjögren’s syndrome is a chronic, systemic disorder of an autoimmune nature, and its primary etiopathogenetic events are not known. Previous studies have found elevated incidence of malignancies in patients with primary Sjögren’s syndrome. However, there are few reports regarding the association of Sjögren’s syndrome with skin cancers, especially with multiple skin cancers developed within a short time. Case Report: We reported an unusual case of a patient with primary Sjögren’s syndrome who suffered from rapidly developed facial and neck skin cancers within two years. Conclusions: Sjögren’s syndrome associated with skin cancer is rare. Our case report suggests that Sjögren’s syndrome patients require continuous follow-up with conventional cancer examination, including skin biopsy for suspected skin lesions. PMID:28373638

  20. Changes in Indirect Markers of Muscle Damage and Tendons After Daily Drop Jumping Exercise with Rapid Load Increase

    Directory of Open Access Journals (Sweden)

    Vidas Paleckis, Mantas Mickevičius, Audrius Snieckus, Vytautas Streckis, Mati Pääsuke, Saulius Rutkauskas, Rasa Steponavičiūtė, Albertas Skurvydas, Sigitas Kamandulis

    2015-12-01

    Full Text Available The aim of this study was to assess changes in indirect markers of muscle damage and type I collagen degradation, as well as, patellar and Achilles tendon morphological differences during nine daily drop-jumps sessions with constant load alternated with rapid increases in load to test the hypothesis that frequent drop-jump training results in negative muscular and tendon adaptation. Young men (n = 9 performed daily drop jump workouts with progression every 3 days in terms of number of jumps, platform height and squat amplitude. Voluntary and electrically evoked knee extensor torque, muscle soreness, blood plasma creatine kinase (CK activity and carboxyterminal cross-linked telopeptide (ICTP, patellar and Achilles tendon thickness and cross-sectional area (CSA were assessed at different time points during the training period and again on days 1, 3, 10 and 17 after the training. The findings were as follows: (1 steady decline in maximal muscle strength with major recovery within 24 hours after the first six daily training sessions; (2 larger decline in electrically induced muscle torque and prolonged recovery during last three training sessions; (3 increase in patellar and Achilles tendons CSA without change in thickness towards the end of training period; (4 increase in jump height but not in muscle strength after whole training period. Our findings suggest that frequent drop-jump sessions with constant load alternated with rapid increases in load do not induce severe muscle damage or major changes in tendons, nonetheless, this type of loading is not advisable for muscle strength improvement.

  1. Effects of in-season short-term aerobic and high-intensity interval training program on repeated sprint ability and jump performance in handball players.

    Science.gov (United States)

    Hermassi, Souhail; Ingebrigtsen, Jørgen; Schwesig, René; Fieseler, Georg; Delank, Karl S; Chamari, Karim; Shephard, Roy J; Chelly, Mohamed S

    2016-11-16

    This study examined the effects of a 7-week in-season aerobic and high-intensity interval-training program on performance tests linked to successful handball play (e.g., repeated sprint and jumping ability). Thirty participants (age 17.0 ± 1.2 years, body mass 81.1 ± 3.4 kg, height 1.82± 0.07 m) performed a Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1), a squat (SJ) and a countermovement jump test (CMJ), as well as a repeated sprint ability test (RSA). From this, maximal aerobic speed (MAS, reached at the end of the Yo-Yo IR1), jumping ability, best time in a single sprint trial (RSAbest), total time (RSATT) and the performance decrement (RSAdec) during all sprints were calculated. Later, subjects were randomly assigned to a control group (CG; n=15) performing their normal training schedule (5 weekly sessions of ~90 min of handball training) or an experimental group (EG; n=15). The EG performed two 30 min sessions per week of high-intensity aerobic exercises at 100-130% of MAS in addition to their normal training schedule. Demonstrated a significant improvement in MAS (d=4.1), RSAbest (d=1.9), RSATT (d=1.5) and RSAdec (d=2.3) after the training period. Also, significant interaction effects (time x group) were found for all parameters as the EG significantly improved performances in all tests after training. The greatest interaction effects were observed in MAS (2=0.811) and CMJ (2=0.759). No relevant changes in test performances were found in the CG (mean d=-0.02). These results indicate that individually speed controlled aerobic and interval training is effective for improving specific handball performance.

  2. Recombinant Sj16 from Schistosoma japonicum contains a functional N-terminal nuclear localization signal necessary for nuclear translocation in dendritic cells and interleukin-10 production.

    Science.gov (United States)

    Sun, Xi; Yang, Fan; Shen, Jia; Liu, Zhen; Liang, Jinyi; Zheng, Huanqin; Fung, Mingchiu; Wu, Zhongdao

    2016-12-01

    Sj16 is a Schistosoma japonicum-derived protein (16 kDa in molecular weight) that has been identified as an immune modulation molecule, but the mechanisms of modulation of immune responses are not known. In this report, we aimed to investigate the host immune regulation mechanism by recombinant Sj16 (rSj16) and thus illuminate the molecular mechanism of immune evasion by S. japonicum. The effect of rSj16 and rSj16 mutants on the biology of dendritic cells (DCs) was assessed by examining DC maturation, cytokine production, and expression of surface markers by flow cytometry and enzyme-linked immunosorbent assay. We found that rSj16 significantly stimulated interleukin (IL)-10 production and inhibited LPS-induced bone marrow-derived dendrite cell (BMDC) maturation in a dose-dependent manner. By using antibody neutralization experiments and IL-10-deficient (knockout) mice, we confirmed that the inhibitory effect of rSj16 on LPS-induced BMDCs is due to its induction of IL-10 production. To understand how rSj16 induces the production of IL-10, we analyzed the protein sequence and revealed two potential nuclear localization signals (NLS) in Sj16. The N-terminal NLS (NLS1) is both necessary and sufficient for translocation of rSj16 to the nucleus of BMDCs and is important for subsequent induction of IL-10 production and the inhibition of BMDC maturation by rSj16. The results of our study concluded that the ability of rSj16 to inhibit DC functions is IL-10 dependent which is operated by IL-10R signal pathway. This study also confirmed that NLS is an important domain associated with increased production of IL-10. Our findings will extend the current understanding on host-schistosome relationship and provide insight about bottleneck of parasitic control.

  3. Comparison Of Two Systems Designed To Measure Vertical Jump Height. [Comparación de dos sistemas diseñados para medir altura de salto vertical].

    Directory of Open Access Journals (Sweden)

    Alejandro Santos-Lozano

    2014-04-01

    Full Text Available The vertical jump height is commonly employed to assess indirectly the lower body strength and power. Traditional methods to assess the vertical jump height are been replaced by new emerging technologies as optical mat platform. The aim of the present study was checked the agreement between one traditional contact mat (Globus Ergo Tester and an optical mat (Optojump System, and to investigate the interchangeability of this 2 commercial systems estimating vertical jump in different types of jump (Squat Jump, Counter Movement Jump and Abalakov. Significantly differences between methods in each jump condition were reported, high Inter-class Correlation Coefficients values (ranged between 0.972 to 0.990 were found between methods in each jump condition and the coefficient of variation values were ranged from 6.18 to 7.32. T-test revealed significantly differences between the limits of agreement at 95% in all jumps between methods jump heights. The results of this study show that the Optojump, as optical mat, reported lower values than the Globus Ergo Tester, a contact mat. There are evidences that Optojump and Globus Ergo Tester are not interchangeably. Resumen La altura de salto vertical es empleada para evaluar la potencia y fuerza del tren inferior. Los métodos tradicionales para evaluar el salto vertical están siendo sustituidos por nuevas tecnologías emergentes como las plataformas ópticas. El objetivo del presente estudio fue comprobar el grado de concordancia entre una plataforma de contacto (Globus Ergo Tester y una óptica (Optojump System, e investigar si pueden ser utilizadas de manera intercambiable estimando distintos tipos de salto vertical (Squat Jump, Counter Movement Jump y Abalakov. Los resultados mostraron diferencias significativas entre los métodos estimando altura de salto vertical, un elevado valor de Coeficiente de Correlación (entre 0.972-0.990 y un Coeficiente de Variación comprendido entre 6.18 y 7.32. Las pruebas T

  4. Testability Synthesis for Jumping Carry Adders

    Directory of Open Access Journals (Sweden)

    Chien-In Henry Chen

    2002-01-01

    Full Text Available Synthesis for testability ensures that the synthesized circuit is testable by exploring the fundamental relationship between don't care and redundancy. With the exploration of the relationship, redundancy removal can be applied to improve the testability, reduce the area and improve the speed of a synthesized circuit. The test generation problems have been adequately solved, therefore an innovative testability synthesis strategy is necessary for achieving the maximum fault coverage and area reduction for maximum speed. This paper presents a testability synthesis methodology applicable to a top–down design method based on the identification and removal of redundant faults. Emphasis has been placed on the testability synthesis of a high-speed binary jumping carry adder. A synthesized 32-bit testable adder implemented by a 1.2 μm CMOS technology performs addition in 4.09 ns. Comparing with the original synthesized circuit, redundancy removal yields a 100% testable design with a 15% improvement in speed and a 25% reduction in area.

  5. Vortex jump behavior in coupled nanomagnetic heterostructures

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, S.; Phatak, C., E-mail: cd@anl.gov [Materials Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439 (United States); Petford-Long, A. K. [Materials Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439 (United States); Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208 (United States); Heinonen, O. [Materials Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439 (United States); Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Rd, Evanston, Illinois 60208-3112 (United States)

    2014-11-24

    The spin configuration and magnetic behavior in patterned nanostructures can be controlled by manipulating the interplay between the competing energy terms. This in turn requires fundamental knowledge of the magnetic interactions at the local nanometer scale. Here, we report on the spin structure and magnetization behavior of patterned discs containing exchange coupled ferromagnetic layers with additional exchange bias to an antiferromagnetic layer. The magnetization reversal was explored by direct local visualization of the domain behavior using in-situ Lorentz transmission electron microscopy, from which quantitative magnetic induction maps were reconstructed. The roles of the main competing energy terms were elucidated and the reversal mechanism was identified as a coupled phenomenon of incoherent rotation in the exchange-biased layer and localized vortex nucleation and discontinuous propagation in the free layer, including an anomalous jump in the trajectory. The observations were supported by micromagnetic simulations and modeled phase shift simulations. The work presented here provides fundamental insights into opportunities for macroscopic control of the energy landscape of magnetic heterostructures for functional applications.

  6. Ethics in radiology: wait lists queue jumping.

    Science.gov (United States)

    Cunningham, Natalie; Reid, Lynette; MacSwain, Sarah; Clarke, James R

    2013-08-01

    Education in ethics is a requirement for all Royal College residency training programs as laid out in the General Standards of Accreditation for residency programs in Canada. The ethical challenges that face radiologists in clinical practice are often different from those that face other physicians, because the nature of the physician-patient interaction is unlike that of many other specialties. Ethics education for radiologists and radiology residents will benefit from the development of teaching materials and resources that focus on the issues that are specific to the specialty. This article is intended to serve as an educational resource for radiology training programs to facilitate teaching ethics to residents and also as a continuing medical education resource for practicing radiologists. In an environment of limited health care resources, radiologists are frequently asked to expedite imaging studies for patients and, in some respects, act as gatekeepers for specialty care. The issues of wait lists, queue jumping, and balancing the needs of individuals and society are explored from the perspective of a radiologist.

  7. A jumping shape memory alloy under heat.

    Science.gov (United States)

    Yang, Shuiyuan; Omori, Toshihiro; Wang, Cuiping; Liu, Yong; Nagasako, Makoto; Ruan, Jingjing; Kainuma, Ryosuke; Ishida, Kiyohito; Liu, Xingjun

    2016-02-16

    Shape memory alloys are typical temperature-sensitive metallic functional materials due to superelasticity and shape recovery characteristics. The conventional shape memory effect involves the formation and deformation of thermally induced martensite and its reverse transformation. The shape recovery process usually takes place over a temperature range, showing relatively low temperature-sensitivity. Here we report novel Cu-Al-Fe-Mn shape memory alloys. Their stress-strain and shape recovery behaviors are clearly different from the conventional shape memory alloys. In this study, although the Cu-12.2Al-4.3Fe-6.6Mn and Cu-12.9Al-3.8Fe-5.6Mn alloys possess predominantly L2(1) parent before deformation, the 2H martensite stress-induced from L2(1) parent could be retained after unloading. Furthermore, their shape recovery response is extremely temperature-sensitive, in which a giant residual strain of about 9% recovers instantly and completely during heating. At the same time, the phenomenon of the jumping of the sample occurs. It is originated from the instantaneous completion of the reverse transformation of the stabilized 2H martensite. This novel Cu-Al-Fe-Mn shape memory alloys have great potentials as new temperature-sensitive functional materials.

  8. Triple jump examinations for dental student assessment.

    Science.gov (United States)

    Navazesh, Mahvash; Rich, Sandra K; Chopiuk, Nasrin Bahari; Keim, Robert G

    2013-10-01

    The triple jump examination (TJE) attempts to assess a higher level of learning with demand for analysis, critical thinking, and resolution of problems presented by written scenarios based on patient care situations. The purpose of this study was to examine the internal consistency, scale reliability, and interrater reliability of the TJE used at the Ostrow School of Dentistry, University of Southern California. On the sample of 2,227 examinations administered by seventy-seven raters across a three-year time period, the Cronbach's coefficient alpha for internal consistency of the overall TJE was found to be good (a=0.869). The internal consistency of the three subscales was found to be acceptable (a=0.731), good (a=0.820), and good (a=0.820). Average and single measures intraclass correlation coefficients (ICC) for scale reliability were significant at p<0.001, indicating strong interrater reliability. There were no statistically significant differences (p≤0.05) in the mean scores assigned on the TJE between rater groups defined by rater experience level with the TJE. A very high level of agreement among rater pairs was also observed. Across the entire three-year study period, with over 19,152 ratings, the seventy-seven raters were in general agreement 99.5 percent of the time and in exact agreement 77.2 percent of the time.

  9. SOLUTION TO BSDE WITH NONHOMOGENEOUS JUMPS UNDER LOCALLY LIPSCHITZIAN CONDITION

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    In this paper, we investigate the existence and uniqueness of the solution to a quasilinear backward stochastic differential equation with Poisson jumps. By introducing a series of approximate equations, we can show that BSDE has a unique adapted solution.

  10. Spontaneous Jumping of Coalescing Drops on a Superhydrophobic Surface

    Science.gov (United States)

    Boreyko, Jonathan; Chen, Chuan-Hua

    2009-11-01

    When micrometric drops coalesce in-plane on a superhydrophobic surface, a surprising out-of-plane jumping motion was observed. Such jumping motion triggered by drop coalescence was reproduced on a Leidenfrost surface. High-speed imaging revealed that this jumping motion results from the elastic interaction of the bridged drops with the superhydrophobic/Leidenfrost surface. Experiments on both the superhydrophobic and Leidenfrost surfaces compare favorably to a simple scaling model relating the kinetic energy of the merged drop to the surface energy released upon coalescence. The spontaneous jumping motion on water repellent surfaces enables the autonomous removal of water condensate independently of gravity; this process is highly desirable for sustained dropwise condensation.

  11. Spontaneous Jumping of Coalescing Drops on a Superhydrophobic Surface

    CERN Document Server

    Boreyko, Jonathan

    2009-01-01

    When micrometric drops coalesce in-plane on a superhydrophobic surface, a surprising out-of-plane jumping motion was observed. Such jumping motion triggered by drop coalescence was reproduced on a Leidenfrost surface. High-speed imaging revealed that this jumping motion results from the elastic interaction of the bridged drops with the superhydrophobic/Leidenfrost surface. Experiments on both the superhydrophobic and Leidenfrost surfaces compare favorably to a simple scaling model relating the kinetic energy of the merged drop to the surface energy released upon coalescence. The spontaneous jumping motion on water repellent surfaces enables the autonomous removal of water condensate independently of gravity; this process is highly desirable for sustained dropwise condensation.

  12. Jump Testing and the Speed of Market Adjustment

    DEFF Research Database (Denmark)

    Rasmussen, Torben B.

    Asymptotic properties of jump tests rely on the property that any jump occurs within a single time interval no matter what the observation frequency is. Market microstructure effects in relation to news-induced revaluation of the underlying variable is likely to make this an unrealistic assumption...... for high-frequency transaction data. To capture these microstructure effects, this paper suggests a model in which market prices adjust gradually to jumps in the underlying effcient price. A case study illustrates the empirical relevance of the model, and the performance of different jump tests...... is investigated here and in a simulation study. Evidence indicates that tests based on the largest of scaled price increments perform better than tests comparing measures of variability. Resolving the matter by testing at lower frequencies turns out to be less straightforward....

  13. Stick-jump mode in surface droplet dissolution

    CERN Document Server

    Dietrich, Erik; Zhang, Xuehua; Zandvliet, Harold J W; Lohse, Detlef

    2016-01-01

    The analogy between evaporating surface droplets in air to dissolving long-chain alcohol droplets in water is worked out. We show that next to the three known modi for surface droplet evaporation or dissolution (constant contact angle mode, constant contact radius mode, and stick-slide mode), a fourth mode exists for small droplets on supposedly smooth substrates, namely the stick-jump mode: intermittent contact line pinning causes the droplet to switch between sticking and jumping during the dissolution. We present experimental data and compare them to theory to predict the dissolution time in this stick-jump mode. We also explain why these jumps were easily observed for microscale droplets but not for larger droplets.

  14. METRIC TESTS CHARACTERISTIC FOR ESTIMATING JUMPING FOR VOLLEYBALL PLAYERS

    Directory of Open Access Journals (Sweden)

    Toplica Stojanović

    2008-08-01

    Full Text Available With goal to establish metric tests characteristics for estimating jumping for volleyball players, it was organized a pilot research on pattern of 23 volleyball players from cadet team and 23 students from high-school. For needs of this research four tests are valid for estimation, jump in block with left and right leg and jump in spike with left and right leg. Each test has been taken three times, so that we could with test-re test method determine their reliability, and with factor analysis their validity. Data were processed by multivariate analysis (item analysis, factor analysis from statistical package „Statistica 6.0 for windows“. On the results of research and discussion we can say that the tests had high coefficient of reliability, as well as factor validity, and these tests can be used to estimate jumping for volleyball players.

  15. Bird Flu Strain May Have Jumped from Cat to Human

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_162717.html Bird Flu Strain May Have Jumped From Cat to ... would be the first known transmission of this bird flu strain from cat to human, officials said. ...

  16. Spontaneous azimuthal breakout and instability at the circular hydraulic jump

    CERN Document Server

    Ray, Arnab K; Basu, Abhik; Bhattacharjee, Jayanta K

    2015-01-01

    We consider a shallow, two-dimensional flow of a liquid in which the radial and the azimuthal dynamics are coupled to each other. The steady and radial background flow of this system creates an axially symmetric circular hydraulic jump. On this background we apply time-dependent perturbations of the matter flow rate and the azimuthal flow velocity, with the latter strongly localized at the hydraulic jump. The perturbed variables depend spatially on both the radial and azimuthal coordinates. Linearization of the perturbations gives a coupled system of wave equations. The characteristic equations extracted from these wave equations show that under a marginally stable condition a spontaneous breaking of axial symmetry occurs at the position of the hydraulic jump. Departure from the marginal stability shows further that a linear instability develops in the azimuthal direction, resulting in an azimuthal transport of liquid at the hydraulic jump. The time for the growth of azimuthal instability is scaled by viscosi...

  17. The fluid dynamics of swimming by jumping in copepods

    DEFF Research Database (Denmark)

    Jiang, Houshuo; Kiørboe, Thomas

    2011-01-01

    Copepods swim either continuously by vibrating their feeding appendages or erratically by repeatedly beating their swimming legs resulting in a series of small jumps. The two swimming modes generate different hydrodynamic disturbances and therefore expose the swimmers differently to rheotactic...... limited and temporally ephemeral owing to jump-impulsiveness and viscous decay. In contrast, continuous steady swimming generates two well-extended long-lasting momentum jets both in front of and behind the swimmer, as suggested by the well-known steady stresslet model. Based on the observed jump-swimming...... kinematics of a small copepod Oithona davisae, we further showed that jump-swimming produces a hydrodynamic disturbance with much smaller spatial extension and shorter temporal duration than that produced by a same-size copepod cruising steadily at the same average translating velocity. Hence, small copepods...

  18. The fluid dynamics of swimming by jumping in copepods

    DEFF Research Database (Denmark)

    Jiang, Houshuo; Kiørboe, Thomas

    2011-01-01

    Copepods swim either continuously by vibrating their feeding appendages or erratically by repeatedly beating their swimming legs resulting in a series of small jumps. The two swimming modes generate different hydrodynamic disturbances and therefore expose the swimmers differently to rheotactic...... limited and temporally ephemeral owing to jump-impulsiveness and viscous decay. In contrast, continuous steady swimming generates two well-extended long-lasting momentum jets both in front of and behind the swimmer, as suggested by the well-known steady stresslet model. Based on the observed jump-swimming...... kinematics of a small copepod Oithona davisae, we further showed that jump-swimming produces a hydrodynamic disturbance with much smaller spatial extension and shorter temporal duration than that produced by a same-size copepod cruising steadily at the same average translating velocity. Hence, small copepods...

  19. Jump diffusion models and the evolution of financial prices

    Energy Technology Data Exchange (ETDEWEB)

    Figueiredo, Annibal; Castro, Marcio T. de [Institute of Physics, University of Brasilia (Brazil); Silva, Sergio da [Department of Economics, Federal University of Santa Catarina (Brazil); Gleria, Iram, E-mail: iram@pq.cnpq.br [Institute of Physics, Federal University of Alagoas (Brazil)

    2011-08-08

    We analyze a stochastic model to describe the evolution of financial prices. We consider the stochastic term as a sum of the Wiener noise and a jump process. We point to the effects of the jumps on the return time evolution, a central concern of the econophysics literature. The presence of jumps suggests that the process can be described by an infinitely divisible characteristic function belonging to the De Finetti class. We then extend the De Finetti functions to a generalized nonlinear model and show the model to be capable of explaining return behavior. -- Highlights: → We analyze a stochastic model to describe the evolution of financial prices. → The stochastic term is considered as a sum of the Wiener noise and a jump process. → The process can be described by an infinitely divisible characteristic function belonging to the De Finetti class. → We extend the De Finetti functions to a generalized nonlinear model.

  20. Detection of Dew-Point by substantial Raman Band Frequency Jumps (A new Method)

    DEFF Research Database (Denmark)

    Hansen, Susanne Brunsgaard; Berg, Rolf W.; Stenby, Erling Halfdan

    Detection of Dew-Point by substantial Raman Band Frequency Jumps (A new Method). See poster at http://www.kemi.dtu.dk/~ajo/rolf/jumps.pdf......Detection of Dew-Point by substantial Raman Band Frequency Jumps (A new Method). See poster at http://www.kemi.dtu.dk/~ajo/rolf/jumps.pdf...

  1. Physical aging and structural recovery in a colloidal glass subjected to volume-fraction jump conditions

    Science.gov (United States)

    Peng, Xiaoguang; McKenna, Gregory B.

    2016-04-01

    Three important kinetic phenomena have been cataloged by Kovacs in the investigation of molecular glasses during structural recovery or physical aging. These are responses to temperature-jump histories referred to as intrinsic isotherms, asymmetry of approach, and memory effect. Here we use a thermosensitive polystyrene-poly (N -isopropylacrylamide)-poly (acrylic acid) core-shell particle-based dispersion as a colloidal model and by working at a constant number concentration of particles we use temperature changes to create volume-fraction changes. This imposes conditions similar to those defined by Kovacs on the colloidal system. We use creep experiments to probe the physical aging and structural recovery behavior of colloidal glasses in the Kovacs-type histories and compare the results with those seen in molecular glasses. We find that there are similarities in aging dynamics between molecular glasses and colloidal glasses, but differences also persist. For the intrinsic isotherms, the times teq needed for relaxing or evolving into the equilibrium (or stationary) state are relatively insensitive to the volume fraction and the values of teq are longer than the α -relaxation time τα at the same volume fraction. On the other hand, both of these times grow at least exponentially with decreasing temperature in molecular glasses. For the asymmetry of approach, similar nonlinear behavior is observed for both colloidal and molecular glasses. However, the equilibration time teq is the same for both volume-fraction up-jump and down-jump experiments, different from the finding in molecular glasses that it takes longer for the structure to evolve into equilibrium for the temperature up-jump condition than for the temperature down-jump condition. For the two-step volume-fraction jumps, a memory response is observed that is different from observations of structural recovery in two-step temperature histories in molecular glasses. The concentration dependence of the dynamics

  2. Effects of a Whole-Body Electrostimulation Program on Strength, Sprinting, Jumping, and Kicking Capacity in Elite Soccer Players

    Directory of Open Access Journals (Sweden)

    Andre Filipovic, Marijke Grau, Heinz Kleinöder, Philipp Zimmer, Wildor Hollmann, Wilhelm Bloch

    2016-12-01

    Full Text Available The aim of the present study was to investigate the effect of a 14-week dynamic Whole-Body Electrostimulation (WB-EMS training program on muscular strength, soccer relevant sprint, jump and kicking velocity performance in elite soccer players during competitive season. Twenty-two field-players were assigned to 2 groups: WB-EMS group (EG, n = 12, jump-training group (TG, n = 10. The training programs were conducted twice a week concurrent to 6-7 soccer training sessions during the 2nd half of the season. Participants were tested before (baseline, during (wk-7 and after (wk-14. Blood serum samples for analyzing IGF-1 and CK were taken before each testing, 15-30min post and 24h post the training program. Our findings of the present study were that a 14-week in-season WB-EMS program significant increased one-leg maximal strength (1RM at the leg press machine (1.99 vs. 1.66 kg/kg, p = 0.001, and improved linear sprinting (5m: 1.01 vs. 1.04s, p=0.039, sprinting with direction changes (3.07 vs. 3.25s, p = 0.024, and vertical jumping performance (SJ: 38.8 vs. 35.9cm p = 0.021 as well as kicking velocity (1step: 93.8 vs. 83.9 km·h-1, p < 0.001. The TG showed no changes in strength and performance. The EG revealed significantly increased CK levels 24h post training and yielded significantly higher CK levels compared to the TG. IGF-1 serum levels neither changed in the EG nor in the TG. The results give first hints that two sessions of a dynamic WB-EMS training in addition to 6-7 soccer sessions per week can be effective for significantly enhancing soccer relevant performance capacities in professional players during competitive season.

  3. Fundamental Studies of Jumping-Drop Thermal Diodes

    Science.gov (United States)

    2016-02-29

    Reverse mode with liquid trapped by the colder superhydrophilic surface. ............... 2 Figure 2. Fabrication of the jumping-drop thermal diode...mode, Figure 1b), liquid water is trapped by it and no phase-change heat transfer takes place; heat mainly escapes through ineffective conduction...self- propelled jumping drops returning the working fluid from the colder superhydrophobic surface; (b) Reverse mode with liquid trapped by the colder

  4. ANALYSIS OF INCOMPLETE STOCK MARKET WITH JUMP-DIFFUSION UNCERTAINTY

    Institute of Scientific and Technical Information of China (English)

    Xiuli Chao; Indrajit Bardhan

    2002-01-01

    This paper studies incomplete stock market that includes discontinuous priceprocesses. The discontinuity is modeled by very general point processes admitting onlystochastic intensities. Prices are driven by jump-diffusion uncertainty and have randombut predictable jumps. The space of risk-neutral measures that are associated with themarket is identified and related to fictitious completions. The construction of replicatingportfolios is discussed, and convex duality methods are used to prove existence of optimalconsumption and investment policies for a problem of utility maximization.

  5. Nonlinear H∞ filtering for interconnected Markovian jump systems

    Institute of Scientific and Technical Information of China (English)

    Zhang Xiaomei; Zheng Yufan

    2006-01-01

    The problem of nonlinear H∞ filtering for interconnected Markovian jump systems is discussed. The aim of this note is the design of a nonlinear Markovian jump filter such that the resulting error system is exponentially meansquare stable and ensures a prescribed H∞ performance. A sufficient condition for the solvability of this problem is given in terms of linear matrix inequalities(LMIs). A simulation example is presented to demonstrate the effectiveness of the proposed design approach.

  6. Psycho-physiological response in an automatic parachute jump

    OpenAIRE

    Clemente Suárez, Vicente Javier; Robles Pérez, José Juan; Fernández Lucas, Jesús

    2016-01-01

    Parachute jump is an extreme activity that elicits an intense stress response that affects jumpers' body systems being able to put them at risk. The present research analysed modifications in blood oxygen saturation (BOS), heart rate (HR), cortisol, glucose, lactate, creatine kinase (CK), muscles strength, cortical arousal, autonomic modulation, pistol magazine reload time (PMRT) and state anxiety before and after an automatic open parachute jump in 38 male Spanish soldiers (25.6 ± 5.9 years)...

  7. Gravity-free hydraulic jumps and metal femtocups

    OpenAIRE

    Govindarajan, Rama; Mathur, Manikandan; DasGupta, Ratul; Selvi, N. R.; John, Neena Susan; Kulkarni, G. U.

    2006-01-01

    Hydraulic jumps created by gravity are seen every day in the kitchen sink. We show that at small scales a circular hydraulic jump can be created in the absence of gravity, by surface tension. The theory is motivated by our experimental finding of a height discontinuity in spreading submicron molten metal droplets created by pulsed-laser ablation. By careful control of initial conditions, we show that this leads to solid femtolitre cups of gold, silver, copper, niobium and tin.

  8. Smoothed Particle Hydrodynamic of Hydraulic Jumps in Spillways

    OpenAIRE

    Jonsson, Patrick

    2015-01-01

    This thesis focus on the complex natural phenomena of hydraulic jumps using the numerical method Smoothed Particle Hydrodynamics (SPH). A hydraulic jump is highly turbulent and associated with turbulent energy dissipation, air entrainment, surface waves and spray and strong dissipative processes. It can be found not only in natural streams and in engineered open channels, but also in your kitchen sink at home. The dissipative features are utilized in hydropower spillways and stilling basins t...

  9. Gravity-free hydraulic jumps and metal femtoliter cups.

    Science.gov (United States)

    Mathur, Manikandan; DasGupta, Ratul; Selvi, N R; John, Neena Susan; Kulkarni, G U; Govindarajan, Rama

    2007-04-20

    Hydraulic jumps created by gravity are seen everyday in the kitchen sink. We show that at small scales a circular hydraulic jump can be created in the absence of gravity by surface tension. The theory is motivated by our experimental finding of a height discontinuity in spreading submicron molten metal droplets created by pulsed-laser ablation. By careful control of initial conditions, this leads to solid femtoliter cups of gold, silver, copper, niobium, and tin.

  10. On the Spectral Gap of Brownian Motion with Jump Boundary

    CERN Document Server

    Kolb, Martin

    2011-01-01

    In this paper we consider the Brownian motion with jump boundary and present a new proof of a recent result of Li, Leung and Rakesh concerning the exact convergence rate in the one-dimensional case. Our methods are different and mainly probabilistic relying on coupling methods adapted to the special situation under investigation. Moreover, we answer a question raised by Ben-Ari and Pinsky concerning the dependence of the spectral gap on the jump distribution in a multi-dimensional setting.

  11. Forecasting Exchange Rate Volatility in the Presence of Jumps

    DEFF Research Database (Denmark)

    Busch, Thomas; Christensen, Bent Jesper; Nielsen, Morten Ørregaard

    of exchange rate futures options, allowingcalculation of option implied volatility. We find that implied volatility is an informationallyefficient but biased forecast of future realized exchange rate volatility. Furthermore,we show that log-normality is an even better distributional approximation...... for impliedvolatility than for realized volatility in this market. Finally, we show that the jump componentof future realized exchange rate volatility is to some extent predictable, and thatoption implied volatility is the dominant forecast of the future jump component....

  12. A drop jumps to weightlessness: a lecture demo

    Science.gov (United States)

    Mayer, V. V.; Varaksina, E. I.; Saranin, V. A.

    2017-04-01

    The paper discusses the lecture demonstration of the phenomenon in which a drop lying on a solid unwettable substrate jumps when making the transition to weightlessness. An elementary theory of the phenomenon is given. A jump speed estimate is obtained for small and large drops. The natural vibrational frequency of a flying drop is determined. A full-scale model of Einstein’s elevator is described. Experimental and theoretical results are found to agree satisfactorily.

  13. Importance sampling for jump processes and applications to finance

    OpenAIRE

    Badouraly Kassim, Laetitia; Lelong, Jérôme; Loumrhari, Imane

    2013-01-01

    International audience; Adaptive importance sampling techniques are widely known for the Gaussian setting of Brownian driven diffusions. In this work, we want to extend them to jump processes. Our approach relies on a change of the jump intensity combined with the standard exponential tilting for the Brownian motion. The free parameters of our framework are optimized using sample average approximation techniques. We illustrate the efficiency of our method on the valuation of financial derivat...

  14. Temperature Jump Pyrolysis Studies of RP 2 Fuel

    Science.gov (United States)

    2017-01-09

    Briefing Charts 3. DATES COVERED (From - To) 15 December 2016 – 11 January 2017 4. TITLE AND SUBTITLE Temperature Jump Pyrolysis Studies of RP-2 Fuel...Rev. 8- 98) Prescribed by ANSI Std. 239.18 1 TEMPERATURE JUMP PYROLYSIS STUDIES OF RP-2 FUEL Owen Pryor1, Steven D. Chambreau2, Ghanshyam L...Mixture Distribution A: Approved for public release; distribution unlimited. PA Clearance 17026 4 RP-2 Pyrolysis /Combustion Chemistries? • Recent

  15. Dynamic Jump Intensities and Risk Premiums in Crude Oil Futures and Options Markets

    DEFF Research Database (Denmark)

    Christoffersen, Peter; Jacobs, Kris; Li, Bingxin

    2016-01-01

    and dynamic jump intensities in these markets. Allowing for jumps is crucial for modeling crude oil futures and futures options, and we find evidence in favor of time-varying jump intensities. During crisis periods, jumps occur more frequently. The properties of the jump processes implied by the option data......Options on crude oil futures are the most actively traded commodity options. We develop a class of computationally efficient discrete-time jump models that allow for closed-form option valuation, and we use crude oil futures and options data to investigate the economic importance of jumps...

  16. Electric-Field-Enhanced Jumping-Droplet Condensation

    Science.gov (United States)

    Miljkovic, Nenad; Preston, Daniel; Enright, Ryan; Limia, Alexander; Wang, Evelyn

    2013-11-01

    When condensed droplets coalesce on a superhydrophobic surface, the resulting droplet can jump due to the conversion of surface energy into kinetic energy. This frequent out-of-plane droplet jumping has the potential to enhance condensation heat and mass transfer. In this work, we demonstrated that these jumping droplets accumulate positive charge that can be used to further increase condensation heat transfer via electric fields. We studied droplet jumping dynamics on silanized nanostructured copper oxide surfaces. By characterizing the droplet trajectories under various applied external electric fields (0 - 50 V/cm), we show that condensation on superhydrophobic surfaces results in a buildup of negative surface charge (OH-) due to dissociated water ion adsorption on the superhydrophobic coating. Consequently, the opposite charge (H3O +) accumulates on the coalesced jumping droplet. Using this knowledge, we demonstrate electric-field-enhanced jumping droplet condensation whereby an external electric field opposes the droplet vapor flow entrainment towards the condensing surface to increase the droplet removal rate and overall surface heat transfer by 100% when compared to state-of-the-art dropwise condensing surfaces. This work not only shows significant condensation heat transfer enhancement through the passive charging of condensed droplets, but promises a low cost approach to increase efficiency for applications such as atmospheric water harvesting and dehumidification.

  17. Kinematic structure at the early flight position in ski jumping.

    Science.gov (United States)

    Vodičar, Janez; Coh, Milan; Jošt, Bojan

    2012-12-01

    The purpose of our research was to establish the variability of correlation between the length of the jumps and selected multi-item kinematic variables (n=9) in the early flight phase technique of ski jumping. This study was conducted on a sample of elite Slovenian ski jumpers (N=29) who participated in the experiment on a jumping hill in Hinterzarten, Germany (HS95m) on the 20(th) of August, 2008. The highest and most significant correlations (p=0.01) with the length of the ski jump were found in the multi-item variable height of flying, which was also expressed with the highest level of stability of the explained total variance (TV) on the first factor (TV=69.13%). The most important characteristic of the aerodynamic aspect of early flight was the variable angle between the body chord and the horizontal axis with significantly high correlations (pski and left leg (TV=50.13%), had an explained common variance on the first factor greater than 50% of total variance. The results indicated that some kinematic parameters of ski jumping early flight technique were more important for success considering the length of the jump.

  18. Kinetic asymmetries between forward and drop jump landing tasks

    Directory of Open Access Journals (Sweden)

    Morgana Alves de Britto

    2015-11-01

    Full Text Available Landing asymmetry is a risk factor for knee anterior cruciate ligament injury. The aim of this study was to identify kinetic asymmetries in healthy recreational athletes performing different jump-landing techniques. Twelve recreational athletes engaged in regular training underwent kinetic evaluation using two 3D force plates and were analyzed for: (a three-dimensional peak forces, (b time to peak vertical force, and (c initial phase asymmetries. All data were collected during performance of unilateral and bilateral trials of forward and drop jump tasks. Forward jump-landing tasks elicited greater kinetic asymmetry than drop-landing tasks. Regardless of jump-landing technique, the preferred leg experienced higher forces than the non-preferred leg. The initial landing phase showed more kinetic asymmetries than the later phase when peak vertical forces occur. It was concluded that when screening athletes for kinetic asymmetries that may predispose them to injury, forward jump-landing tasks and the early landing phase might show more kinetic asymmetries than drop jump-landing tasks and the late landing phase, respectively.

  19. The $k$-Tuple Jumping Champions among Consecutive Primes

    CERN Document Server

    Xiaosheng, Wu

    2011-01-01

    For any real $x$ and any integer $k\\ge1$, we say that a set $\\mathcal{D}_{k}$ of $k$ distinct integers is a $k$-tuple jumping champion if it is the most common differences that occurs among $k+1$ consecutive primes less than or equal to $x$. For $k=1$, it's known as the jumping champion introduced by J. H. Conway. In 1999 A. Odlyzko, M. Rubinstein, and M. Wolf announced the Jumping Champion Conjecture that the jumping champions greater than 1 are 4 and the primorials 2, 6, 30, 210, 2310,.... They also made a weaker and possibly more accessible conjecture that any fixed prime $p$ divides all sufficiently large jumping champions. These two conjectures were proved by Goldston and Ledoan under the assumption of appropriate forms of the Hardy-Littlewood conjecture recently. In the present paper we consider the situation for any $k\\ge2$ and prove that any fixed prime $p$ divides every element of all sufficiently large $k$-tuple jumping champions under the assumption that the Hardy-Littlewood prime $k+1$-tuple conje...

  20. Can jumping capacity of adult show jumping horses be predicted on the basis of submaximal free jumps at foal age? A longitudinal study.

    Science.gov (United States)

    Bobbert, Maarten F; Santamaría, Susana; van Weeren, P René; Back, Wim; Barneveld, Albert

    2005-09-01

    The purpose of this study was to quantify performance characteristics of good jumping horses, and to determine whether these were already detectable at foal age. Kinematic data were collected of horses performing free jumps over a 0.60 m high fence at six months of age and of these same horses jumping with a rider over a 1.15 m high fence at five years of age. At five years of age the horses were divided into three groups on the basis of a puissance competition: a group of seven best jumpers that made no errors and in the end cleared a 1.50 m high fence, a group of nine worst jumpers that were unable to clear a 1.40 m high fence, and an intermediate group of 13 horses. Longitudinal kinematic data was available for all seven best jumpers and for six of the nine worst jumpers. Average values of variables for the best jumpers were compared with those of the worst jumpers for the jumps over 1.15 m. In the group of best jumpers, the forelimbs were shorter at forelimb clearance due to increased elbow flexion, and the hind limbs were further retroflexed at hind limb clearance. The same superior technique in clearing fences with the limbs was also found in this group at six months of age. Nevertheless, for individual horses it turned out to be too far-fetched to predict adult jumping capacity on the basis of kinematic variables collected during submaximal jumps at foal age.

  1. Different training schedules influence platelet aggregation in show jumping horses.

    Science.gov (United States)

    Giannetto, C; Arfuso, F; Fazio, F; Giudice, E; Pietro, S Di; Bruschetta, D; Piccione, G

    2017-03-28

    Depending on the intensity, duration and type of physical exercise, equine metabolism has to adapt to nervous, cardiovascular, endocrine and respiratory system requirements. In horses, exercise and training are known to have considerable effects on the mechanisms of hemostatic system involving platelet activity. The aim of the present study was to evaluate the effect of different training schedules on platelet aggregation in 15 Italian Saddle jumping horses. Animals were divided into three equal groups: Group A was subjected to a high intensity-training program; group B to a light training program, group C included sedentary horses. From each animal, blood samples were collected by jugular venipuncture at rest on the 1st, 3rd and 5th days, and afterwards, once a week, for a total of 5 weeks data recording, in order to assess the maximum degree of platelet aggregation and the initial velocity of aggregation (slope) platelet aggregation. Two-way analysis of variance (ANOVA) showed a significant effect of the different training schedules on studied parameters. The results revealed a different degree of platelet aggregation and a different initial velocity of platelet aggregation that changes during the different training schedules in horses that could represent a different protective endothelial mechanism. These findings could have an important role for a clearer knowledge of the physiological reference values of platelet aggregation and for a better interpretation of these variations during the training.

  2. Structural-Parameter-Based Jumping-Height-and-Distance Adjustment and Obstacle Sensing of a Bio-Inspired Jumping Robot

    Directory of Open Access Journals (Sweden)

    Jun Zhang

    2015-06-01

    Full Text Available Jumping-height-and-distance (JHD active adjustment capability is important for jumping robots to overcome different sizes of obstacle. This paper proposes a new structural parameter-based JHD active adjustment approach for our previous jumping robot. First, the JHD adjustments, modifying the lengths of different legs of the robot, are modelled and simulated. Then, three mechanisms for leg-length adjustment are proposed and compared, and the screw-and-nut mechanism is selected. And for adjusting of different structural parameters using this mechanism, the one with the best JHD adjusting performance and the lowest mechanical complexity is adopted. Thirdly, an obstacle-distance-and-height (ODH detection method using only one infrared sensor is designed. Finally, the performances of the proposed methods are tested. Experimental results show that the jumping-height-and distance adjustable ranges are 0.11 m and 0.96 m, respectively, which validates the effectiveness of the proposed JHD adjustment method.

  3. A Multivariate Stochastic Hybrid Model with Switching Coefficients and Jumps: Solution and Distribution

    Directory of Open Access Journals (Sweden)

    D. P. Siu

    2011-01-01

    Full Text Available In this work, a class of multidimensional stochastic hybrid dynamic models is studied. The system under investigation is a first-order linear nonhomogeneous system of Itô-Doob type stochastic differential equations with switching coefficients. The switching of the system is governed by a discrete dynamic which is monitored by a non-homogeneous Poisson process. Closed-form solutions of the systems are obtained. Furthermore, the major part of the work is devoted to finding closed-form probability density functions of the solution processes of linear homogeneous and Ornstein-Uhlenbeck type systems with jumps.

  4. A New Class of Backward Stochastic Partial Differential Equations with Jumps and Applications

    CERN Document Server

    Dai, Wanyang

    2011-01-01

    We formulate a new class of stochastic partial differential equations (SPDEs), named high-order vector backward SPDEs (B-SPDEs) with jumps, which allow the high-order integral-partial differential operators into both drift and diffusion coefficients. Under certain type of Lipschitz and linear growth conditions, we develop a method to prove the existence and uniqueness of adapted solution to these B-SPDEs with jumps. Comparing with the existing discussions on conventional backward stochastic (ordinary) differential equations (BSDEs), we need to handle the differentiability of adapted triplet solution to the B-SPDEs with jumps, which is a subtle part in justifying our main results due to the inconsistency of differential orders on two sides of the B-SPDEs and the partial differential operator appeared in the diffusion coefficient. In addition, we also address the issue about the B-SPDEs under certain Markovian random environment and employ a B-SPDE with strongly nonlinear partial differential operator in the dr...

  5. Effects of loading on maximum vertical jumps: Selective effects of weight and inertia.

    Science.gov (United States)

    Leontijevic, Bojan; Pazin, Nemanja; Bozic, Predrag R; Kukolj, Milos; Ugarkovic, Dusan; Jaric, Slobodan

    2012-04-01

    A novel loading method was applied to explore selective effects of externally added weight (W), weight and inertia (W+I), and inertia (I) on maximum counter-movement jumps (CMJ) performed with arm swing. Externally applied extended rubber bands and/or loaded vest added W, W+I, and I corresponding to 10-40% of subjects' body mass. As expected, an increase in magnitude of all types of load was associated with an increase in ground reaction forces (GRF), as well as with a decrease in both the jumping performance and power output. However, of more importance could be that discernible differences among the effects of W, W+I, and I were recorded despite a relatively narrow loading range. In particular, an increase in W was associated with the minimal changes in movement kinematic pattern and smallest reduction of jumping performance, while also allowing for the highest power output. Conversely, W+I was associated with the highest ground reaction forces. Finally, the lowest maxima of GRF and power were associated with I. Although further research is apparently needed, the obtained finding could be of potential importance not only for understanding fundamental properties of the neuromuscular system, but also for optimization of loading in standard athletic training and rehabilitation procedures.

  6. A comparison of pairs figure skaters in repeated jumps.

    Science.gov (United States)

    Sands, William A; Kimmel, Wendy L; McNeal, Jeni R; Murray, Steven Ross; Stone, Michael H

    2012-01-01

    Trends in pairs figure skating have shown that increasingly difficult jumps have become an essential aspect of high-level performance, especially in the latter part of a competitive program. We compared a repeated jump power index in a 60 s repeated jump test to determine the relationship of repeated jump test to competitive rank and to measure 2D hip, knee, and ankle angles and angular velocities at 0, 20, 40, and 60 s. Eighteen National Team Pairs Figure Skaters performed a 60 s repeated jump test on a large switch-mat with timing of flight and ground durations and digital video recording. Each 60-s period was divided into 6, 10-s intervals, with power indexes (W/kg) calculated for each 10-s interval. Power index by 10-s interval repeated measures ANOVAs (RMANOVA) showed that males exceeded females at all intervals, and the highest power index interval was during 10 to 20 s for both sexes. RMANOVAs of angles and angular velocities showed main effects for time only. Power index and jumping techniques among figure skaters showed rapid and steady declines over the test duration. Power index can predict approximately 50% of competitive rank variance, and sex differences in jumping technique were rare. Key pointsThe repeated jumps test can account for about 50% of the variance in pairs ranks.Changes in technique are largely due to fatigue, but the athletes were able to maintain a maximum flexion knee angle very close to the desired 90 degrees. Changes in angular velocity and jump heights occurred as expected, again probably due to fatigue.As expected from metabolic information, the athletes' power indexes peak around 20s and decline thereafter. Coaches should be aware of this time as a boundary beyond which fatigue becomes more manifest, and use careful choreographic choices to provide rest periods that are disguised as less demanding skating elements to afford recovery.The repeated jumps test may be a helpful off-ice test of power-endurance for figure skaters.

  7. Regenerating Gene Protein as a Novel Autoantigen in the Pathogenesis of Sjögren’s Syndrome

    Directory of Open Access Journals (Sweden)

    Takashi Fujimoto

    2015-12-01

    Full Text Available Sjögren’s syndrome, an autoimmune disease characterized by exocrine gland dysfunction leading to dry mouth and dry eye diseases, is typified by lymphoplasmacytic infiltrations and a progressive destruction of the salivary and lacrimal glands. Despite an ever-increasing focus on identifying the underlying etiology of Sjögren’s syndrome, the factors that initiate this autoimmune disease and the mechanisms that cause the subsequent exocrine gland dysfunction remain a mystery. The original explanatory concept for the pathogenesis of Sjögren’s syndrome proposed a specific, self-perpetuating, immune-mediated loss of acinar and ductal cells as the principal cause of salivary gland dysfunction. We highlight the possible involvement of regenerating gene (Reg in the regeneration and destruction of salivary gland acinar and ductal cells in Sjögren’s syndrome. The Reg gene was originally isolated as a gene specifically overexpressed in regenerating pancreatic islets and constitutes a growth factor family (Reg family. We describe how salivary gland dysfunction is initiated and maintained and how it can be regenerated or progressed, mediated by the Reg gene, Reg protein, and anti-REG autoantibodies in Sjögren’s syndrome.

  8. Effect of Instructions on Selected Jump Squat Variables.

    Science.gov (United States)

    Talpey, Scott W; Young, Warren B; Beseler, Bradley

    2016-09-01

    Talpey, SW, Young, WB, and Beseler, B. Effect of instructions on selected jump squat variables. J Strength Cond Res 30(9): 2508-2513, 2016-The purpose of this study was to compare 2 instructions on the performance of selected variables in a jump squat (JS) exercise. The second purpose was to determine the relationships between JS variables and sprint performance. Eighteen male subjects with resistance training experience performed 2 sets of 4 JS with no extra load with the instructions to concentrate on (a) jumping for maximum height and (b) extending the legs as fast as possible to maximize explosive force. Sprint performance was assessed at 0- to 10-m and 10- to 20-m distances. From the JS jump height, peak power, relative peak power, peak force, peak velocity, and countermovement distance were measured from a force platform and position transducer system. The JS variables under the 2 instructions were compared with paired t-tests, and the relationships between these variables and sprint performance were determined with Pearson's correlations. The jump height instruction produced greater mean jump height and peak velocity (p 0.05). Jump height was the variable that correlated most strongly with 10-m time and 10- to 20-m time under both instructions. The height instruction produced a stronger correlation with 10-m time (r = -0.455), but the fast leg extension JS produced a greater correlation with 10-20 time (r = -0.545). The results indicate that instructions have a meaningful influence on JS variables and therefore need to be taken into consideration when assessing or training athletes.

  9. Scaling and jumping: gravity loses grip on small jumpers.

    Science.gov (United States)

    Scholz, Melanie N; Bobbert, Maarten F; Knoek van Soest, A J

    2006-06-21

    There are several ways to quantify jumping performance, a common definition being the height gained by the body's centre of mass (CM) in the airborne phase. Under this definition, jump height is determined by take-off velocity. According to the existing literature on jumping and scaling, take-off velocity, and hence jumping performance is independent of size because the energy that differently sized geometrically scaled jumpers can generate with their muscles is proportional to their mass. In this article it is shown, based on a simple energy balance, that it is incorrect to presume that jump height does not depend on size. Contrary to common belief, size as such has does have an effect on take-off velocity, putting small jumpers at a mechanical advantage, as is shown analytically. To quantify the effect of size on take-off velocity, a generic jumper model was scaled geometrically and evaluated numerically. While a 70-kg jumper took off at 2.65 m/s and raised its CM by 0.36 m after take-off, a perfectly geometrically similar jumper of 0.7 g reached a take-off velocity of 3.46 m/s and raised its CM by 0.61 m. The reason for the better performance of small jumpers is their higher efficacy in transforming the energy generated by the actuators into energy due to vertical velocity of the CM. Considering the ecological and evolutionary relevance of different definitions of jump height, size-dependent efficacy might explain why habitual jumping is especially prominent among small animals such as insects.

  10. Isokinetic knee extension and vertical jumping: are they related?

    Science.gov (United States)

    Iossifidou, Anna; Baltzopoulos, Vasilios; Giakas, Giannis

    2005-10-01

    The aim of this study was to examine joint power generation during a concentric knee extension isokinetic test and a squat vertical jump. The isokinetic test joint power was calculated using four different methods. Five participants performed concentric knee extensions at 0.52, 1.57, 3.14 and 5.23 rad x s(-1) on a Lido isokinetic dynamometer. The squat vertical jump was performed on a Kistler force plate. Kinematic data from both tests were collected and analysed using an ELITE optoelectronic system. An inverse dynamics model was applied to measure knee joint moment in the vertical jump. Knee angular position data from the kinematic analysis in the isokinetic test were used to derive the actual knee angular velocity and acceleration, which, in turn, was used to correct the dynamometer moment for inertial effects. Power was measured as the product of angular velocity and moment at the knee joint in both tests. Significant differences (P knee joint power in the two tests (squat vertical jump: 2255 +/- 434 W; isokinetic knee extension: 771 +/- 81 W). Correlation analysis revealed that there is no relationship between the peak knee joint power during the vertical jump and the slow velocity isokinetic tests. Higher isokinetic velocity tests show better relationships with the vertical jump but only if the correct method for joint power calculation is used in the isokinetic test. These findings suggest that there are important differences in muscle activation and knee joint power development that must be taken into consideration when isokinetic tests are used to predict jumping performance.

  11. Oral findings in patients with primary Sjögren's syndrome and oral lichen planus - a preliminary study on the effects of bovine colostrum-containing oral hygiene products

    DEFF Research Database (Denmark)

    Pedersen, A.M.; Torpet, L.A.; Reibel, J.

    2002-01-01

    Primary Sjögren's syndrome, oral lichen planus, bovine colostrum, saliva, xerostomia, oral mucosa......Primary Sjögren's syndrome, oral lichen planus, bovine colostrum, saliva, xerostomia, oral mucosa...

  12. Cytokine concentrations in stimulated whole saliva among patients with primary Sjögren's syndrome, secondary Sjögren's syndrome, and patients with primary Sjögren's syndrome receiving varying doses of interferon for symptomatic treatment of the condition: a preliminary study.

    Science.gov (United States)

    Streckfus, C; Bigler, L; Navazesh, M; Al-Hashimi, I

    2001-06-01

    Sjögren's syndrome is an autoimmune disorder which causes diminished salivary flow due to autoimmune sialoadenitis. This decrease in saliva flow is the result of inflammation and atrophy of the salivary glands. Most treatment regimens are palliative in nature, but treatment with interferon (IFN) holds promise for Sjögren's syndrome sufferers. Several studies have investigated cytokine concentrations in the salivary glandular tissues from Sjögren's syndrome patients; however, there is little information concerning cytokine expression in saliva. This is especially true with respect to treatment modalities and their effects on local cytokines. A clinical study was conducted to determine salivary interleukin (IL)-6, IFN, and IL-2, concentrations among subjects diagnosed with primary and secondary Sjögren's syndrome and a healthy control group. The primary Sjögren's syndrome showed significantly higher salivary IL-2 and salivary IL-6 than the control and secondary Sjögren's groups. There were no between group differences for salivary IFN concentrations. In addition, the study assessed salivary IL-6, IFN, and IL-2 concentrations among 18 Sjögren's syndrome patients before and after administration of IFN via the oral mucosal route. The results of the study showed that the mean values for the pre- and post-treatment groups for stimulated whole saliva flow rates were 3.15 and 3.74 ml/5 min, respectively. The post-treatment group exhibited a 16.8% increase in stimulated whole saliva flow rates. The salivary IL-6 concentration was 53.3% lower for the post-treatment group (17.79) as compared to the baseline value (33.35). The values for salivary IFN and salivary total protein were virtually unchanged from their baseline values. Salivary IL-2 values, however, were 50% lower in the post-treatment group (3.07) when compared to their respective baseline values (6.10). The results of this study suggest that healthy individuals exhibit lower salivary IL-2 and IL-6 as compared

  13. NBA与CBA比赛跳跃步法的对比分析%Comparison of Jumping Footwork in NBA and CBA Matches

    Institute of Scientific and Technical Information of China (English)

    姚远; 阮棉芳; 任峰

    2012-01-01

    通过录像分析了NBA与CBA各8场比赛,对比CBA与NBA比赛中各个位置队员使用各种跳跃步法的差异。将跳跃步法按原地起跳、一步助跑起跳、两步以上单脚起跳、两步以上双脚起跳、后撤步起跳、连续起跳、横向移动急停起跳等7种方式进行了归类和统计。结果发现CBA队员比NBA队员更多地采用了原地起跳,而在一步助跑起跳与两步以上助跑双脚起跳的使用频率上比NBA低。相差最大的是横向移动急停起跳,NBA的控球后卫、得分后卫、小前锋使用该步法的频率分别是CBA相同队员的1.6倍、2.1倍、3.9倍。提示:CBA队员应该增加运动中起跳的次数,尤其要加强对横向移动急停起跳的训练与应用。同时要加强对横向移动急停起跳的生物力学研究,为提高训练效果、预防损伤、研发符合篮球运动特点的篮球鞋提供理论依据。%Through video analysis,the author analyzed 8 matches each in NBA and CBA so as to compare the difference of the different jumping footwork of of the different position players in CBA and NBA matches.The jumping footwork is classified into 7 types,i.e.,standing jump,one-step jump,over two steps one-foot jump,over two steps two-feet jump,backward step jump,continuous jump and lateral movement abrupt stop jump.The result shows that compared to NBA players,more CBA players use standing jump and the frequency of using one-step jump and over two steps two-feet jump is lower.Great different can be found in lateral movement abrupt stop jump.The frequency of using this footwork by NBA's point guard,shooting guard and small forward is 1.6 times,2.1 times and 3.9 times separately than the CBA players.This suggests that CBA players should increase jumping times in movement and strengthen the training and application of lateral movement abrupt stop jumping.At the same time,more attention should be paid to the biomechanical study of lateral movement abrupt stop jump

  14. Partial Nucleate Pool Boiling at Low Heat Flux: Preliminary Ground Test for SOBER-SJ10

    Science.gov (United States)

    Wu, Ke; Li, Zhen-Dong; Zhao, Jian-Fu; Li, Hui-Xiong; Li, Kai

    2016-05-01

    Focusing on partial nucleate pool boiling at low heat flux, SOBER-SJ10, one of 27 experiments of the program SJ-10, has been proposed to study local convection and heat transfer around an isolated growing vapor bubble during nucleate pool boiling on a well characterized flat surface in microgravity. An integrated micro heater has been developed. By using a local pulse overheating method in the experimental mode of single bubble boiling, a bubble nucleus can be excited with accurate spatial and temporal positioning on the top-side of a quartz glass substrate with a thickness of 2 mm and an effective heating area of 4.5 mm in diameter, and then grows under an approximate constant heat input provided by the main heater on the back-side of the substrate. Ten thin film micro-RTDs are used for local temperature measurements on the heating surface underneath the growing bubble. Normal pool boiling experiments can also be carried out with step-by-step increase of heating voltage. A series of ground test of the flight module of SOBER-SJ10 have been conducted. Good agreement of the measured data of single phase natural convection with the common-used empirical correlation warrants reasonable confidence in the data. It is found that the values of the incipience superheat of pool boiling at different subcooling are consistent with each others, verifying that the influence of subcooling on boiling incipience can be neglected. Pool boiling curves are also obtained, which shows great influence of subcooling on heat transfer of partial nucleate pool boiling, particularly in lower heat flux.

  15. The validity and reliability of an iPhone app for measuring vertical jump performance.

    Science.gov (United States)

    Balsalobre-Fernández, Carlos; Glaister, Mark; Lockey, Richard Anthony

    2015-01-01

    The purpose of this investigation was to analyse the concurrent validity and reliability of an iPhone app (called: My Jump) for measuring vertical jump performance. Twenty recreationally active healthy men (age: 22.1 ± 3.6 years) completed five maximal countermovement jumps, which were evaluated using a force platform (time in the air method) and a specially designed iPhone app. My jump was developed to calculate the jump height from flight time using the high-speed video recording facility on the iPhone 5 s. Jump heights of the 100 jumps measured, for both devices, were compared using the intraclass correlation coefficient, Pearson product moment correlation coefficient (r), Cronbach's alpha (α), coefficient of variation and Bland-Altman plots. There was almost perfect agreement between the force platform and My Jump for the countermovement jump height (intraclass correlation coefficient = 0.997, P iPhone 5 s app.

  16. The acute effect of vibration applications on jumping performance

    Directory of Open Access Journals (Sweden)

    Suat Yıldız

    2012-12-01

    Full Text Available Recently, vibration has become very popular as a method of exercise and training and drawn attention of researchers. The aim of this study was to analyses the acute affect of vibration applications as a method of exercise and training on jumping performance.In this study experimental group consists of 25 subjects who are studying at Physical Education and Sports Department of Sakarya University (age 22.2±1.7 years, height 179.2±4.8 cm. body weight 71.5±9.0 kg. This study included a vibration at density of 35 Hz (3x30 sec. frequency that result from aerobic exercise that has low density and b just methods of aerobic exercise (without any vibration that has low density. Subjects have taken the tests of countermovement and squat jumping after 2 minutes of each application. All applications and tests have been done in nonconsecutive days in a random scheme. In statistical analysis Wilcoxon has been applied in nonparametric scheme.For counter movement jumping; height of jumping, the difference between before and after the application of vibration related to the point of peak power and average power has been found significiant (respectively, p0.05; p>0.05; p>0.05.As a result, it is concluded that vibration that is applied at the range of 35 Hz frequency could increase the performance of acute countermovement jumping.

  17. Mechanical parameters and flight phase characteristics in aquatic plyometric jumping.

    Science.gov (United States)

    Louder, Talin J; Searle, Cade J; Bressel, Eadric

    2016-09-01

    Plyometric jumping is a commonly prescribed method of training focused on the development of reactive strength and high-velocity concentric power. Literature suggests that aquatic plyometric training may be a low-impact, effective supplement to land-based training. The purpose of the present study was to quantify acute, biomechanical characteristics of the take-off and flight phase for plyometric movements performed in the water. Kinetic force platform data from 12 young, male adults were collected for counter-movement jumps performed on land and in water at two different immersion depths. The specificity of jumps between environmental conditions was assessed using kinetic measures, temporal characteristics, and an assessment of the statistical relationship between take-off velocity and time in the air. Greater peak mechanical power was observed for jumps performed in the water, and was influenced by immersion depth. Additionally, the data suggest that, in the water, the statistical relationship between take-off velocity and time in air is quadratic. Results highlight the potential application of aquatic plyometric training as a cross-training tool for improving mechanical power and suggest that water immersion depth and fluid drag play key roles in the specificity of the take-off phase for jumping movements performed in the water.

  18. Jump point detection for real estate investment success

    Science.gov (United States)

    Hui, Eddie C. M.; Yu, Carisa K. W.; Ip, Wai-Cheung

    2010-03-01

    In the literature, studies on real estate market were mainly concentrating on the relation between property price and some key factors. The trend of the real estate market is a major concern. It is believed that changes in trend are signified by some jump points in the property price series. Identifying such jump points reveals important findings that enable policy-makers to look forward. However, not all jump points are observable from the plot of the series. This paper looks into the trend and introduces a new approach to the framework for real estate investment success. The main purpose of this paper is to detect jump points in the time series of some housing price indices and stock price index in Hong Kong by applying the wavelet analysis. The detected jump points reflect to some significant political issues and economic collapse. Moreover, the relations among properties of different classes and between stocks and properties are examined. It can be shown from the empirical result that a lead-lag effect happened between the prices of large-size property and those of small/medium-size property. However, there is no apparent relation or consistent lead in terms of change point measure between property price and stock price. This may be due to the fact that globalization effect has more impact on the stock price than the property price.

  19. Unilateral jump behavior in young professional female ballet dancers.

    Science.gov (United States)

    Golomer, E; Féry, Y A

    2001-09-01

    In the field of dance, lateral body actions should be differently influenced by training. Classes should develop symmetrical jump behavior by the alternate working of the two body sides. In contrast, asymmetrical training effect linked to hemispheric laterality should be also expected. Indeed, for aesthetic reasons, the preferred led has to give the jump direction while the other leg has to carry out the impulsion during take-off. In addition, and for functional reasons, the preferred leg also has to ensure a soft landing and to avoid imbalance upon landing. To address the question, we studied ten professional right-footed female ballet dancers in a unilateral experimental task: the maximal vertical jump (MVJ). The MVJ height was compared for each leg in ten trials. In addition, the side of the leg usually involved in a choreographic bilateral task was determined. All these right-footed dancers selected their left leg as the impulsion leg for the choreographic jump so as to reserve the right leg for the expression of the artistic gesture linked to emotional laterality. However, ANOVA did not show differences between the right and left legs in MVJ. In these young ballerinas, jump actions of the two body sides seem to develop symmetrically by class training effects.

  20. Volatility Forecasting: Downside Risk, Jumps and Leverage Effect

    Directory of Open Access Journals (Sweden)

    Francesco Audrino

    2016-02-01

    Full Text Available We provide empirical evidence of volatility forecasting in relation to asymmetries present in the dynamics of both return and volatility processes. Using recently-developed methodologies to detect jumps from high frequency price data, we estimate the size of positive and negative jumps and propose a methodology to estimate the size of jumps in the quadratic variation. The leverage effect is separated into continuous and discontinuous effects, and past volatility is separated into “good” and “bad”, as well as into continuous and discontinuous risks. Using a long history of the S & P500 price index, we find that the continuous leverage effect lasts about one week, while the discontinuous leverage effect disappears after one day. “Good” and “bad” continuous risks both characterize the volatility persistence, while “bad” jump risk is much more informative than “good” jump risk in forecasting future volatility. The volatility forecasting model proposed is able to capture many empirical stylized facts while still remaining parsimonious in terms of the number of parameters to be estimated.

  1. CONNECTION OF FUNCTIONAL ABILITIES WITH JUMPING AND THROWING ATHLETIC DISCIPLINES

    Directory of Open Access Journals (Sweden)

    Igor Stanojević

    2014-06-01

    Full Text Available The aim of this study was to determine the connection between functional abilities with results of jumping and throwing athletic disciplines with athletes. The sample was taken from a population of elementary school students from Prokuplje region, 13 and 14 old, included in regular physical education classes. The sample consisted of 200 male athletes involved in the training process in sports clubs at least three times a week in addition to physical education classes. For assessment of functional abilities six functional tests were used: resting heart rate, Cooper test, heart rate in the first minute after Cooper test, heart rate in the second minute after Cooper test, systolic arterial blood pressure, diastolic arterial blood pressure. For assessment of jumping and throwing athletic disciplines four tests were used: long jump, high jump, shot put and javelin. Data analysis was performed with canonical correlation and regression analysis. The results showed a statistically significant correlation between functional abilities with all of tests in jumping and throwing athletic disciplines.

  2. Biological Jumping Mechanism Analysis and Modeling for Frog Robot

    Institute of Scientific and Technical Information of China (English)

    Meng Wang; Xi-zhe Zang; Ji-zhuang Fan; Jie Zhao

    2008-01-01

    This paper presents a mechanical model of jumping robot based on the biological mechanism analysis of frog. By biological observation and kinematic analysis the frog jump is divided into take-off phase, aerial phase and landing phase. We find the similar trajectories of hindlimb joints during jump, the important effect of foot during take-off and the role of forelimb in supporting the body. Based on the observation, the frog jump is simplified and a mechanical model is put forward. The robot leg is represented by a 4-bar spring/linkage mechanism model, which has three Degrees of Freedom (DOF) at hip joint and one DOF (passive) at tarsometatarsal joint on the foot. The shoulder and elbow joints each has one DOF for the balancing function of arm.The ground reaction force of the model is analyzed and compared with that of frog during take-off. The results show that the model has the same advantages of low likelihood of premature lift-off and high efficiency as the frog. Analysis results and the model can be employed to develop and control a robot capable of mimicking the jumping behavior of flog.

  3. Självkänsla hos daghemsbarn : En kvalitativ undersökning om hur barnträdgårdslärare bekräftar och stärker barnets självkänsla på daghem

    OpenAIRE

    Fant, Sofia

    2017-01-01

    Syftet med detta examensarbete är att ta reda på hur en barnträdgårdslärare kan stärka och bekräfta barnets självkänsla på daghem. Vilken syn och uppfattning finns det om självkänslan på daghem och hur kan man stödja barnen på bästa sätt när det gäller självkänslan? I detta examensarbete har jag genom litteratur tagit fram vad självkänsla är, men även olika definitioner kring självkänslan och hur miljön runt om kan påverka självkänslan hos barnet. I intervjuerna som blev gjorda framkom ...

  4. Kulturelle Fyrtårne i Region Sjælland

    DEFF Research Database (Denmark)

    Sørensen, Flemming; Kjølbæk, Anita Schou; Bærenholdt, Jørgen Ole

    2010-01-01

    Rapporten analyserer Region Sjællands kulturelle attraktioners betydning socialt og økonomisk. Analysen er foretaget på baggrund af 1) en definitionsmæssig afklaring af begreberne 'kulturelle attraktioner' og 'kulturelle fyrtårne' og en teoretisk diskussion af kulturelle attraktioners betydning; ...... områder sættes i spil. Disse potentialer påvirker dog ligeledes de enkelte kommuner da værdien i at deltage i disse fyrtårne manifesterer sig lokalt i form af identitetsskabelse, livskvalitet, netværk, jobs, og omsætning, og afledt deraf bosætning og turisme....

  5. Cerebral Venous Thrombosis Revealing Primary Sjögren Syndrome: Report of 2 Cases

    Directory of Open Access Journals (Sweden)

    A. Mercurio

    2013-01-01

    Full Text Available Sjögren syndrome (SS is an autoimmune disease of the exocrine glands, characterized by focal lymphocytic infiltration and destruction of these glands. Neurologic complications are quite common, mainly involving the peripheral nervous system (PNS. The most common central nervous system (CNS manifestations are myelopathy and microcirculation vasculitis. However, specific diagnostic criteria for CNS SS are still lacking. We report two cases of primary SS in which the revealing symptom was cerebral venous thrombosis (CVT in the absence of genetic or acquired thrombophilias.

  6. Complete atrioventricular block in adult Sjögren's syndrome with anti-Ro autoantibody.

    Science.gov (United States)

    Sung, Myung Jun; Park, Sung-Hoon; Kim, Seong-Kyu; Lee, Young-Soo; Park, Chul-Yeon; Choe, Jung-Yoon

    2011-06-01

    Anti-Ro autoantibody is associated with Sjögren's syndrome (SS), systemic lupus erythematosus (SLE), and neonatal lupus syndrome (i.e., congenital complete heart block in newborns). Generally, the adult atrioventricular (AV) node is believed to be relatively resistant to the scarring effects of anti-Ro/anti-La autoantibodies. However, there have been some reports of adult complete AV block in SS and SLE patients. Here, we report a case of complete heart block in primary SS with anti-Ro autoantibodies, with no other risk factor for the development of heart block, and review their etiological association.

  7. Fatal Tuberculous Myositis in an Immunocompromised Adult With Primary Sjögren's Syndrome

    Directory of Open Access Journals (Sweden)

    Chi-Chang Huang

    2010-09-01

    Full Text Available Tuberculous myositis, which mimics rheumatic symptoms, is an extremely rare disease. Clinical ambiguity easily leads to misdiagnosis and delayed initial treatment. We present the case of a 55-year-old man who had primary Sjögren's syndrome and active cutaneous vasculitis treated with steroid and immunosuppressive drugs. He presented with a swollen, painful, hot left thigh. Although anti-tuberculosis medications were administered soon after a positive acid-fast stain of incisional muscular tissue, he died of rapidly progressive tuberculous myositis and multiorgan failure following 18 days of hospitalization. This case is presented to increase the awareness of this rare entity in clinical practice.

  8. Sjögren-Larsson syndrome: importance of early diagnosis and aggressive physiotherapy.

    Science.gov (United States)

    Kathuria, Sushruta; Arora, Shikha; Ramesh, V

    2012-09-15

    Sjögren-Larsson syndrome (SLS) is a congenital ichthyotic disorder with spasticity. We describe a case of a 5-year-old boy with SLS diagnosed clinically based on congenital ichythosis, quadriplegia, and mental retardation. The child responded well to emollients and antihistamines. His quadriplegia was managed by aggressive physiotherapy and mental retardation by stimulation techniques. After a 3-year follow up, significant improvement was seen in his motor and mental disability. This case highlights the importance of clinical diagnosis and early intervention for such a disabling disorder.

  9. Characterization and genomic analysis of chromate resistant and reducing Bacillus cereus strain SJ1

    Directory of Open Access Journals (Sweden)

    He Minyan

    2010-08-01

    Full Text Available Abstract Background Chromium is a toxic heavy metal, which primarily exists in two inorganic forms, Cr(VI and Cr(III. Chromate [Cr(VI] is carcinogenic, mutational, and teratogenic due to its strong oxidizing nature. Biotransformation of Cr(VI to less-toxic Cr(III by chromate-resistant and reducing bacteria has offered an ecological and economical option for chromate detoxification and bioremediation. However, knowledge of the genetic determinants for chromate resistance and reduction has been limited so far. Our main aim was to investigate chromate resistance and reduction by Bacillus cereus SJ1, and to further study the underlying mechanisms at the molecular level using the obtained genome sequence. Results Bacillus cereus SJ1 isolated from chromium-contaminated wastewater of a metal electroplating factory displayed high Cr(VI resistance with a minimal inhibitory concentration (MIC of 30 mM when induced with Cr(VI. A complete bacterial reduction of 1 mM Cr(VI was achieved within 57 h. By genome sequence analysis, a putative chromate transport operon, chrIA1, and two additional chrA genes encoding putative chromate transporters that likely confer chromate resistance were identified. Furthermore, we also found an azoreductase gene azoR and four nitroreductase genes nitR possibly involved in chromate reduction. Using reverse transcription PCR (RT-PCR technology, it was shown that expression of adjacent genes chrA1 and chrI was induced in response to Cr(VI but expression of the other two chromate transporter genes chrA2 and chrA3 was constitutive. In contrast, chromate reduction was constitutive in both phenotypic and gene expression analyses. The presence of a resolvase gene upstream of chrIA1, an arsenic resistance operon and a gene encoding Tn7-like transposition proteins ABBCCCD downstream of chrIA1 in B. cereus SJ1 implied the possibility of recent horizontal gene transfer. Conclusion Our results indicate that expression of the chromate

  10. Is Hammarby Sjöstad a model case? Crime prevention through environmental design in Stockholm, Sweden

    DEFF Research Database (Denmark)

    Grønlund, Bo

    2012-01-01

    of residents of Hammarby Sjöstad are compared with other areas in Stockholm. This chapter concludes that CPTED guidelines are met to a large degree: crime rates are relatively lower and perceived safety is higher in Hammarby Sjöstad than Stockholm’s average. Finally, the role of CPTED versus other factors when......Crime Prevention Through Environmental Design (CPTED) claims to reduce crime and fear of crime through urban design and planning. If it does, it ought to be part of the sustainable planning and design of cities. This chapter gives an overview of the development of CPTED principles and then uses...... the European Committee for Standardization (CEN) guidelines to assess the case study of Hammarby Sjöstad – a residential area in Stockholm, the capital of Sweden. Urban planning and urban design principles are assessed from a CPTED point of view. Crime statistics as well as data on perceived safety...

  11. Severe autoimmune hemolytic anemia associated with IgM warm auto-antibodies in primary Sjögren's syndrome.

    Science.gov (United States)

    Shinoda, Koichiro; Taki, Hirofumi; Hounoki, Hiroyuki; Ogawa, Reina; Sugiyama, Eiji; Tobe, Kazuyuki

    2010-02-01

    Primary Sjögren's syndrome is an autoimmune disorder involving mainly salivary and lachrymal glands. However, many extraglandular symptoms have also been reported. Although leucocytopenia and lymphocytopenia are frequently observed in hematological disorders, autoimmune hemolytic anemia is rarely reported. We experienced a case of primary Sjögren's syndrome developing severe autoimmune hemolytic anemia. The patient's red blood cells showed spontaneous agglutination in saline at room temperature, and immunoglobulin M (IgM) was detected on the surface of red blood cells by flow cytometry, indicating that autoimmune hemolytic anemia was caused by warm reactive IgM antibodies. Immediate corticosteroid therapy resulted in a dramatic recovery. We report a first case of severe autoimmune hemolytic anemia caused by warm reactive IgM antibodies in primary Sjögren's syndrome.

  12. Jacobsens ukendte samling af stensager fra den græske oldtid. Obsidian, økser, matricer, ansigtssten og andre sjældne oldsager

    DEFF Research Database (Denmark)

    Sørensen, Lasse

    2012-01-01

    Jacobsens ukendte samling af stensager fra den græske oldtid. Obsidian, økser, matricer, ansigtssten og andre sjældne oldsager......Jacobsens ukendte samling af stensager fra den græske oldtid. Obsidian, økser, matricer, ansigtssten og andre sjældne oldsager...

  13. Crying Without Tears : Dimensions of Crying and Relations With Ocular Dryness and Mental Well-Being in Patients With Sjögren's Syndrome

    NARCIS (Netherlands)

    van Leeuwen, N; Bossema, E R; Vermeer, R R; Kruize, A A; Bootsma, H; Vingerhoets, A J J M; Bijlsma, J W J; Geenen, R

    2016-01-01

    This study examined dimensions of crying and its relations with ocular dryness and mental well-being in patients with Sjögren's syndrome, a systemic autoimmune disease with dryness as primary symptom. Three-hundred patients with Sjögren's syndrome completed questionnaires on crying, dryness, and

  14. Construction of eukaryotic expression vector encoding ATP synthase lipid-binding protein-like protein gene of Sj and its expression in HeLa cells

    Institute of Scientific and Technical Information of China (English)

    Ouyang Danming; Hu Yongxuan; Li Mulan; Zeng Xiaojun; He Zhixiong; Yuan Caijia

    2008-01-01

    Objective: To clone and construct the recombinant plasmid containing ATP synthase lipid-binding protein-like protein gene of Schistosoma japonicum,(SjAslp) and transfer it into mammalian cells to express the objective protein. Methods: By polymerase chain reaction (PCR) technique, SjAslp was amplified from the constructed recombinant plasmid pBCSK+/SjAslp, and inserted into cloning vector pUCm-T. Then, SjAslp was subcloned into an eukaryotic expression vector pcDNA3.1(+). After identifying it by PCR, restrictive enzymes digestion and DNA sequencing, the recombinant plasmid was transfected into HeLa cells using electroporation, and the expression of the recombinant protein was analyzed by immunocytochemical assay. Resnlts: The specific gene fragment of 558 bp was successfully amplified. The DNA vaccine of SjAslp was successfully constructed. Immunocytochemical assay showed that SjAslp was expressed in the cytoplasm of HeLa cells. Conclusion: SjAslp gene can be expressed in eukaryotic system, which lays the foundation for development of the SjAslp DNA vaccine against schitosomiasis.

  15. Associations between salivary gland histopathologic diagnoses and phenotypic features of Sjögren's syndrome among 1,726 registry participants

    DEFF Research Database (Denmark)

    Daniels, Troy E; Cox, Darren; Shiboski, Caroline H

    2011-01-01

    To examine associations between labial salivary gland (LSG) histopathology and other phenotypic features of Sjögren's syndrome (SS).......To examine associations between labial salivary gland (LSG) histopathology and other phenotypic features of Sjögren's syndrome (SS)....

  16. Vertical jumping tests in volleyball: reliability, validity, and playing-position specifics.

    Science.gov (United States)

    Sattler, Tine; Sekulic, Damir; Hadzic, Vedran; Uljevic, Ognjen; Dervisevic, Edvin

    2012-06-01

    Vertical jumping is known to be important in volleyball, and jumping performance tests are frequently studied for their reliability and validity. However, most studies concerning jumping in volleyball have dealt with standard rather than sport-specific jumping procedures and tests. The aims of this study, therefore, were (a) to determine the reliability and factorial validity of 2 volleyball-specific jumping tests, the block jump (BJ) test and the attack jump (AJ) test, relative to 2 frequently used and systematically validated jumping tests, the countermovement jump test and the squat jump test and (b) to establish volleyball position-specific differences in the jumping tests and simple anthropometric indices (body height [BH], body weight, and body mass index [BMI]). The BJ was performed from a defensive volleyball position, with the hands positioned in front of the chest. During an AJ, the players used a 2- to 3-step approach and performed a drop jump with an arm swing followed by a quick vertical jump. A total of 95 high-level volleyball players (all men) participated in this study. The reliability of the jumping tests ranged from 0.97 to 0.99 for Cronbach's alpha coefficients, from 0.93 to 0.97 for interitem correlation coefficients and from 2.1 to 2.8 for coefficients of variation. The highest reliability was found for the specific jumping tests. The factor analysis extracted one significant component, and all of the tests were highly intercorrelated. The analysis of variance with post hoc analysis showed significant differences between 5 playing positions in some of the jumping tests. In general, receivers had a greater jumping capacity, followed by libero players. The differences in jumping capacities should be emphasized vis-a-vis differences in the anthropometric measures of players, where middle hitters had higher BH and body weight, followed by opposite hitters and receivers, with no differences in the BMI between positions.

  17. Two bi-stability jumps in theoretical wind models for massive stars and the implications for luminous blue variable supernovae

    Science.gov (United States)

    Petrov, Blagovest; Vink, Jorick S.; Gräfener, Götz

    2016-05-01

    Luminous blue variables (LBVs) have been suggested to be the direct progenitors of supernova Types IIb and IIn, with enhanced mass loss prior to explosion. However, the mechanism of this mass loss is not yet known. Here, we investigate the qualitative behaviour of theoretical stellar wind mass loss as a function of Teff across two bi-stability jumps in blue supergiant regime and also in proximity to the Eddington limit, relevant for LBVs. To investigate the physical ingredients that play a role in the radiative acceleration we calculate blue supergiant wind models with the CMFGEN non-local thermodynamic equilibrium model atmosphere code over an effective temperature range between 30 000 and 8800 K. Although our aim is not to provide new mass-loss rates for BA supergiants, we study and confirm the existence of two bi-stability jumps in mass-loss rates predicted by Vink et al. However, they are found to occur at somewhat lower Teff (20 000 and 9000 K, respectively) than found previously, which would imply that stars may evolve towards lower Teff before strong mass loss is induced by the bi-stability jumps. When the combined effects of the second bi-stability jump and the proximity to Eddington limit are accounted for, we find a dramatic increase in the mass-loss rate by up to a factor of 30. Further investigation of both bi-stability jumps is expected to lead to a better understanding of discrepancies between empirical modelling and theoretical mass-loss rates reported in the literature, and to provide key inputs for the evolution of both normal AB supergiants and LBVs, as well as their subsequent supernova Type II explosions.

  18. Contribution of non-extensor muscles of the leg to maximal-effort countermovement jumping

    Directory of Open Access Journals (Sweden)

    Yoshioka Shinsuke

    2005-09-01

    Full Text Available Abstract Background The purpose of this study was to determine the effects of non-extensor muscles of the leg (i.e., muscles whose primary function is not leg extension on the kinematics and kinetics of human maximal-effort countermovement jumping. Although it is difficult to address this type of question through experimental procedures, the methodology of computer simulation can be a powerful tool. Methods A skeletal model that has nine rigid body segments and twenty degrees of freedom was developed. Two sets of muscle models were attached to this skeletal model: all (most of major muscles in the leg ("All Muscles" model and major extensor muscles in the leg (i.e., muscles whose primary function is leg extension; "Extensors Only" model. Neural activation input signal was represented by a series of step functions with a step duration of 0.05 s. Simulations were started from an identical upright standing posture. The optimal pattern of the activation input signal was searched through extensive random-search numerical optimization with a goal of maximizing the height reached by the mass centre of the body after jumping up. Results The simulated kinematics was almost two-dimensional, suggesting the validity of two-dimensional analyses when evaluating net mechanical outputs around the joints using inverse dynamics. A greater jumping height was obtained for the "All Muscles" model (0.386 m than for the "Extensors Only" model (0.301 m. For the "All Muscles" model, flexor muscles developed force in the beginning of the countermovement. For the "All Muscles" model, the sum of the work outputs from non-extensor muscles was 47.0 J, which was 13% of the total amount (359.9 J. The quantitative distribution of the work outputs from individual muscles was markedly different between these two models. Conclusion It was suggested that the contribution of non-extensor muscles in maximal-effort countermovement jumping is substantial. The use of a computer

  19. Effects of kettlebell training on postural coordination and jump performance

    DEFF Research Database (Denmark)

    Jay, Kenneth; Jakobsen, Markus Due; Sundstrup, Emil

    2013-01-01

    ABSTRACT: The aim of this study was to investigate the effectiveness of a worksite intervention using kettlebell training to improve postural reactions to perturbation and jump performance.This single-blind randomized controlled trial involved 40 adults (n=40) from occupations with a high....... The outcome measures were postural reactions to sudden perturbation and maximal countermovement jump height.Compared to the control group, the training group significant decreased stopping time following perturbation (-109ms, 95% CI [-196:-21]). Jump height increased significantly in the training group (1.5cm......, 95% CI [0.5:2.5]), but this was non-significantly different from control.Kettlebell training improves postural reactions to sudden perturbation. Future studies should investigate whether kettlebell training can reduce the risk of low-back injury in occupations with manual material handling or patient...

  20. Physiological arousal and perception of bodily state during parachute jumping.

    Science.gov (United States)

    Schedlowski, M; Tewes, U

    1992-01-01

    Heart rate and respiration rate were recorded with a portable data recording system before and during a parachute jump in 36 male sport parachutists with differing degrees of experience. The recordings were analyzed at 12 psychologically relevant points in time along with the subjective ratings of physical arousal. Novice parachutists showed a higher degree of self-rated arousal during jumps. However, the two groups displayed nearly parallel curves for heart and respiration rates, differing significantly from each other only in the level of their respective heart rates. Furthermore, experienced jumpers seem to be better informed about their state of physiological arousal during the jump than are novice jumpers. These results do not confirm the proposed anxiety inhibition process, postulated by Epstein (1967).

  1. Condensation and jumping relay of droplets on lotus leaf

    Science.gov (United States)

    Lv, Cunjing; Hao, Pengfei; Yao, Zhaohui; Song, Yu; Zhang, Xiwen; He, Feng

    2013-07-01

    Dynamic behavior of micro water droplet condensed on a lotus leaf with two-tier roughness is studied. Under laboratory environment, the contact angle of the micro droplet on single micro papilla increases smoothly from 80° to 160° during the growth of condensed water. The best-known "self-cleaning" phenomenon will be lost. A striking observation is the out-of-plane jumping relay of condensed droplets triggered by falling droplets, as well as its sustained speed obtained in continuous jumping relays. The underlying mechanism can be used to enhance the automatic removal of dropwise condensation without the help from any external force. The surface tension energy dissipation is the main reason controlling the critical size of jumping droplet and its onset velocity of rebounding.

  2. Dynamical Jumps in a Shape Memory Alloy Oscillator

    Directory of Open Access Journals (Sweden)

    H. S. Oliveira

    2014-01-01

    Full Text Available The dynamical response of systems with shape memory alloy (SMA elements presents a rich behavior due to their intrinsic nonlinear characteristic. SMA’s nonlinear response is associated with both adaptive dissipation related to hysteretic behavior and huge changes in properties caused by phase transformations. These characteristics are attracting much technological interest in several scientific and engineering fields, varying from medical to aerospace applications. An important characteristic associated with dynamical response of SMA system is the jump phenomenon. Dynamical jumps result in abrupt changes in system behavior and its analysis is essential for a proper design of SMA systems. This paper discusses the nonlinear dynamics of a one degree of freedom SMA oscillator presenting pseudoelastic behavior and dynamical jumps. Numerical simulations show different aspects of this kind of behavior, illustrating its importance for a proper understanding of nonlinear dynamics of SMA systems.

  3. Aerodynamic Jump: A Short Range View for Long Rod Projectiles

    Directory of Open Access Journals (Sweden)

    Mark Bundy

    2001-01-01

    Full Text Available It is shown that aerodynamic jump for a nonspinning kinetic energy penetrator is not – as conventional definitions may infer – a discontinuous change in the direction of motion at the origin of free flight, nor is it the converse, a cumulative redirection over a domain of infinite extent. Rather, with the aid of an alternative kinematical definition, it is shown that aerodynamic jump for such a projectile is a localized redirection of the center-of-gravity motion, caused by the force of lift due to yaw over the relatively short region from entry into free flight until the yaw reaches its first maximum. A rigorous proof of this statement is provided, but the primary objective of this paper is to provide answers to the questions: what is aerodynamic jump, what does it mean, and what aspects of the flight trajectory does it refer to, or account for.

  4. Multiple Tune Jumps to Overcome Horizontal Depolarizing Resonances

    Science.gov (United States)

    Huang, H.; Ahrens, L. A.; Bai, M.; Brown, K. A.; Dutheil, Y.; Gardner, C.; Glenn, J. W.; Lin, F.; Mackay, W. W.; Meot, F.; Poblaguev, A.; Ranjbar, V.; Roser, T.; Schoefer, V.; Tepikian, S.; Tsoupas, N.; Yip, K.; Zelenski, A.; Zeno, K.

    2016-02-01

    Imperfection and vertical intrinsic depolarizing resonances have been overcome by the two partial Siberian snakes in the Alternative Gradient Synchrotron(AGS). The relatively weak but numerous horizontal resonances are the main source of polarization loss in the AGS. A pair of horizontal tune jump quads have been used to overcome these weak resonances. The locations of the two quads have to be chosen such that the disturbance to the beam optics is minimum. The emittance growth has to be mitigated for this method to work. In addition, this technique needs very accurate jump timing. Using two partial Siberian snakes, with vertical tune inside the spin tune gap and 80% polarization at AGS injection, polarized proton beam had reached 1.5 × 1011 proton per bunch with 65% polarization. With the tune jump timing optimized and emittance preserved, more than 70% polarization with 2 × 1011 protons per bunch has been achieved.

  5. Condensation and jumping relay of droplets on lotus leaf

    CERN Document Server

    Lv, Cunjing; Yao, Zhaohui; Song, Yu; Zhang, Xiwen; He, Feng

    2013-01-01

    Dynamic behavior of micro water droplet condensed on a lotus leaf with two-tier roughness is studied. Under laboratory environment, the contact angle of the micro droplet on single micro papilla increases smoothly from 80 deg to 160 deg during the growth of condensed water. The best-known "self-clean" phenomenon, will be lost. A striking observation is the out-of-plane jumping relay of condensed droplets triggered by falling droplets, as well as its sustained speed obtained in continuous jumping relays, enhance the automatic removal of dropwise condensation without the help from any external force. The surface tension energy dissipation is the main reason controlling the critical size of jumping droplet and its onset velocity of rebounding.

  6. Vertical Jump Biomechanics Altered With Virtual Overhead Goal.

    Science.gov (United States)

    Ford, Kevin R; Nguyen, Anh-Dung; Hegedus, Eric J; Taylor, Jeffrey B

    2017-04-01

    Virtual environments with real-time feedback can simulate extrinsic goals that mimic real life conditions. The purpose was to compare jump performance and biomechanics with a physical overhead goal (POG) and with a virtual overhead goal (VOG). Fourteen female subjects participated (age: 18.8 ± 1.1 years, height: 163.2 ± 8.1 cm, weight 63.0 ± 7.9 kg). Sagittal plane trunk, hip, and knee biomechanics were calculated during the landing and take-off phases of drop vertical jump with different goal conditions. Repeated-measures ANOVAs determined differences between goal conditions. Vertical jump height displacement was not different during VOG compared with POG. Greater hip extensor moment (P biomechanical testing, screening, and training conditions.

  7. Role of Muscle Morphology in Jumping, Sprinting, and Throwing Performance in Participants With Different Power Training Duration Experience.

    Science.gov (United States)

    Methenitis, Spyridon K; Zaras, Nikolaos D; Spengos, Konstantinos M; Stasinaki, Angeliki-Nikoletta E; Karampatsos, Giorgos P; Georgiadis, Giorgos V; Terzis, Gerasimos D

    2016-03-01

    The aim of the study was to examine the correlation between muscle morphology and jumping, sprinting, and throwing performance in participants with different power training duration experience. Thirty-six power-trained young men were assigned to 3 groups according to the length of their power training: less experienced (muscle cross-sectional area (CSA) with anthropometry. The vastus lateralis architecture and fiber type composition were evaluated with ultrasonography and muscle biopsies, respectively. When all subjects were considered as 1 group (n = 36), jumping performance was correlated with LBM, fascicle length, and type II fiber CSA; sprinting performance was correlated with estimated thigh muscle CSA alone; and shot throwing was correlated with LBM and type I, IIA fiber CSA. In the least experienced group, the LBM of the lower extremities was the most significant contributor for power performance, whereas in the moderately experienced group, the LBM, architectural properties, and type II fiber percentage CSA were the most significant contributors. For the experienced group, fascicle length and type II fiber percentage CSA were the most significant factors for power performance. These data suggest that jumping performance is linked with muscle morphology, regardless of strength or power training. The vastus lateralis muscle morphology could only partially explain throwing performance, whereas it cannot predict sprinting performance. Power performance in experienced participants rely more on the quality of the muscle tissue rather than the quantity.

  8. The acute effect of vibration applications on jumping performance

    Directory of Open Access Journals (Sweden)

    Şener Soylu

    2012-12-01

    Full Text Available Recently, vibration has become very popular as a method of exercise and training and drawn attention of researchers. The aim of this study was to analyses the acute affect of vibration applications as a method of exercise and training on jumping performance. In this study experimental group consists of 25 subjects who are studying at Physical Education and Sports Department of Sakarya University (age 22.2±1.7 years, height 179.2±4.8 cm. body weight 71.5±9.0 kg. This study included a vibration at density of 35 Hz (3x30 sec. frequency  that result from  aerobic exercise that has low density and b just  methods of aerobic exercise (without any vibration that has  low density. Subjects have taken the tests of countermovement and squat jumping after 2 minutes of each application. All applications and tests have been done in nonconsecutive days in a random scheme. In statistical analysis Wilcoxon has been applied in nonparametric scheme. For counter movement jumping; height of jumping,  the difference between before and after  the application of vibration related to the point of peak power and average power has been found significiant (respectively, p<0.05; p<0.05; p<0.01. In addition to this, no statistical difference was found for squat vertical jumping before and after the application of vibration related to the point of peak power and average power (respectively, p>0.05; p>0.05; p>0.05. As a result, it is concluded that vibration that is applied at the range of 35 Hz frequency could increase the performance of acute countermovement jumping

  9. Coalescence-induced jumping of droplet: Inertia and viscosity effects

    Science.gov (United States)

    Farokhirad, Samaneh; Morris, Jeffrey F.; Lee, Taehun

    2015-10-01

    The problem of coalescence-induced self-propelled jumping of droplet is studied using three-dimensional numerical simulation. The focus is on the effect of inertia and in particular the effect of air density on the behavior of the merged droplet during jumping. A lattice Boltzmann method is used for two identical, static micro-droplets coalescing on a homogeneous substrate with contact angle ranging from 0∘ to 180∘. The results reveal that the effect of air density is significant on detachment of the merged droplet from the substrate at the later stage of the jumping process; the larger the air density, the larger the jumping height of the droplet. Analysis of streamlines and vorticity contours is performed for density ratios ranging from 60 to 800. These show a generation of vortical structures inside and around the droplet. The intensity of these structures gets weaker after droplet departure as the air inertia is decreased. The results are also presented in terms of phase diagrams of the merged droplet jumping for different Ohnesorge numbers (Oh) and surface wettabilities for both small and large density ratios. The critical value of contact angle where the merged droplet jumps away from the substrate is independent of density ratio and has a value around 150∘. However, the critical value of Oh depends on both density ratio and wettability of the surface for contact angles greater than 150∘. In this range of contact angle, the diagrams show two distinct dynamical regimes for different density ratios, namely, inertial and viscous regimes.

  10. Harnack Inequalities and Applications for Ornstein-Uhlenbeck Semigroups with Jump

    CERN Document Server

    Ouyang, Shun-Xiang; Wang, Feng-Yu

    2009-01-01

    The Harnack inequality established in [13] for generalized Mehler semigroup is improved and generalized. As applications, the log-Harnack inequality, the strong Feller property, the hyper-bounded property, and some heat kernel inequalities are presented for a class of O-U type semigroups with jump. These inequalities and semigroup properties are indeed equivalent, and thus sharp, for the Gaussian case. As an application of the log-Harnack inequality, the HWI inequality is established for the Gaussian case. Perturbations with linear growth are also investigated.

  11. Horizon effects for surface waves in wave channels and circular jumps

    CERN Document Server

    Jannes, Gil; Chaline, Jennifer; Maïssa, Philippe; Mathis, Christian; Rousseaux, Germain

    2011-01-01

    Surface waves in classical fluids experience a rich array of black/white hole horizon effects. The dispersion relation depends on the characteristics of the fluid (in our case, water and silicon oil) as well as on the fluid depth and the wavelength regime. In some cases, it can be tuned to obtain a relativistic regime plus high-frequency dispersive effects. We discuss two types of ongoing analogue white-hole experiments: deep water waves propagating against a counter-current in a wave channel and shallow waves on a circular hydraulic jump.

  12. Effects of loading on maximum vertical jumps: selective effects of weight and inertia

    OpenAIRE

    Leontijevic, Bojan; Pazin, Nemanja; Bozic, Predrag R.; Kukolj, Milos; Ugarkovic, Dusan; Jaric, Slobodan

    2011-01-01

    A novel loading method was applied to explore selective effects of externally added weight (W), weight and inertia (W+I), and inertia (I) on maximum counter-movement jumps (CMJ) performed with arm swing. Externally applied extended rubber bands and/or loaded vest added W, W+I, and I corresponding to 10–40% of subjects' body mass. As expected, an increase in magnitude of all types of load was associated with an increase in ground reaction forces (GRF), as well as with a decrease in both the ju...

  13. Jumping for Fun? Negotiating Mobility and the Geopolitics of Foursquare

    Directory of Open Access Journals (Sweden)

    Germaine R. Halegoua

    2016-08-01

    Full Text Available Rather than assume that there is some universal “right way” to engage social media platforms, we interrogate how the location-based social media practice known as “jumping” played out on the popular service Foursquare. We use this case to investigate how a “global” or universal system is constructed with an imagined user in mind, one who enjoys a particular type of mobility and experience of place. Through the analysis of official Foursquare policies and mission statements, discussions among developers, interviews with and conversations among Foursquare users, online traces left by jumpers, and correspondence between designers and users on discussion forums, we identify how certain practices and participants are discursively constructed as normative, while other practices and groups are marginalized. Through the study of “jumping,” and its association with Indonesian players in particular, we highlight tensions between the assumptions and industrial strategies of Foursquare designers and the emergent practices and norms of early adopters and avid participants. We argue that the practices of “Indonesian” Foursquare jumpers and the discourses surrounding their use of Foursquare illustrate that practices understood as transgressive or resistive might best be read as strategies for engaging with a platform as groups contend with marginalizing social, economic, and/or political conditions. The case study examined in this article highlights the practices of participants who attempt to integrate themselves into the design of a social media system and the “workarounds,” tensions, negotiations, and logics that manifest in that process.

  14. Sponsored parachute jumps--can they cause prolonged pain?

    OpenAIRE

    Straiton, N; Sterland, J

    1986-01-01

    A survey of parachute injuries sustained in 1984 at a local parachute club was made using hospital notes and a questionnaire. The overall injury rate was 0.2%. The injury rate in first time jumpers was 1.1%. The injuries often resulted in a prolonged hospital stay, time off work and residual pain and disability. Injury rates may be reduced by more prolonged and intensive training preceding the first jumps. Those people not interested in parachuting as a regular sport and who jump once only in...

  15. Sponsored parachute jumps--can they cause prolonged pain?

    Science.gov (United States)

    Straiton, N; Sterland, J

    1986-06-01

    A survey of parachute injuries sustained in 1984 at a local parachute club was made using hospital notes and a questionnaire. The overall injury rate was 0.2%. The injury rate in first time jumpers was 1.1%. The injuries often resulted in a prolonged hospital stay, time off work and residual pain and disability. Injury rates may be reduced by more prolonged and intensive training preceding the first jumps. Those people not interested in parachuting as a regular sport and who jump once only in order to raise money for charity are at risk of serious injury and perhaps should consider less dangerous alternatives.

  16. ASCAN Helms simulates parachute jump during VAFB training exercises

    Science.gov (United States)

    1990-01-01

    1990 Group 13 Astronaut Candidate (ASCAN) Susan J. Helms simulates a parachute jump during ground egress and parasail training exercises at Vance Air Force Base (VAFB), Enid, Oklahoma. With her arms folded against her chest, Helms jumps from a brick platform onto the ground. In line behind her are Charles J. Precourt followed by Leroy Chiao. The training is designed to prepare the ASCANs for proper survival measures to take in the event of an emergency aboard the T-38 jet trainer aircraft they will frequently use once they become full-fledged astronauts. ASCANs completed the VAFB training courses from 07-29-90 through 07-31-90.

  17. Hydrodynamics and energetics of jumping copepod nauplii and copepodids

    DEFF Research Database (Denmark)

    Wadhwa, Navish; Andersen, Anders Peter; Kiørboe, Thomas

    2014-01-01

    , we measured the swimming kinematics and fluid flow around jumping Acartia tonsa at different stages of its life cycle, using particle image velocimetry and particle tracking velocimetry. We found that the flow structures around nauplii and copepodids are topologically different, with one and two...... vortex rings, respectively. Our measurements suggest that copepodids cover a larger distance compared to their body size in each jump and are also hydrodynamically quieter, as the flow disturbance they create attenuates faster with distance. Also, copepodids are energetically more efficient than nauplii...

  18. Aerodynamic Jump: A Short Range View for Long Rod Projectiles

    OpenAIRE

    Mark Bundy

    2001-01-01

    It is shown that aerodynamic jump for a nonspinning kinetic energy penetrator is not – as conventional definitions may infer – a discontinuous change in the direction of motion at the origin of free flight, nor is it the converse, a cumulative redirection over a domain of infinite extent. Rather, with the aid of an alternative kinematical definition, it is shown that aerodynamic jump for such a projectile is a localized redirection of the center-of-gravity motion, caused by the force of lift ...

  19. Jumps into democracy: The transition in the Polity Index

    DEFF Research Database (Denmark)

    Paldam, Martin; Gundlach, Erich

    The Democratic Transition is the process of regime change from authoritarian at the traditional level of development to democratic at the modern level. This process is analyzed on 7,565 pairs of income and political regime data. Regimes are normally in local status quo equilibrium, so they have s......-run changes are due to triggering events that cause regime jumps. Triggering events are almost random, while most jumps are in the direction of the tension. This mechanism integrates the short and the long run to give the transition....

  20. Tunneling of the blocked wave in a circular hydraulic jump

    Science.gov (United States)

    Bhattacharjee, Jayanta K.

    2017-02-01

    The formation of a circular hydraulic jump in a thin liquid layer involves the creation of a horizon where the incoming wave (surface ripples) is blocked by the fast flowing fluid. That there is a jump at the horizon is due to the viscosity of the fluid which is not relevant for the horizon formation. By using a tunneling formalism developed for the study of the Hawking radiation from black holes, we explicitly show that there will be an exponentially small tunneling of the blocked wave across the horizons as anticipated in studies of "analog gravity".