WorldWideScience

Sample records for two-point touch technique

  1. Modification of the Two-Point Touch Cane Technique: A Pilot Study.

    Science.gov (United States)

    Jacobson, William H.; Ehresman, Paul

    1983-01-01

    Four blind adults were observed to determine the extent of the natural movement of their centers of gravity in relation to arc height during the two-point touch technique for long cane travel. The Ss learned and practiced a modified technique using their center of gravity as much as possible. (Author)

  2. The Application of Two-Point Touch Cane Technique to Theories of Motor Control and Learning Implications for Orientation and Mobility Training.

    Science.gov (United States)

    Croce, Ronald V.; Jacobson, William H.

    1986-01-01

    Basic behavioral processes involved in motor control based on theories of motor control and learning are outlined using the teaching of two-point touch cane technique as an application of the theories. The authors assert the importance of repetition, practice, and sufficient learning time. (Author/CL)

  3. A Seamless Approach to Transitioning Cane Skills from the Diagonal to the Two-Point Touch Technique

    Science.gov (United States)

    Penrod, William M.

    2012-01-01

    The profession of orientation and mobility (O&M) is replete with literature describing specific cane techniques, strategies for teaching O&M to specific populations and age groups, rationales, and appropriate settings. These strategies and techniques are also addressed in many university preparation programs. In this article, the author discusses…

  4. A Seamless Approach to Transitioning Cane Skills from the Diagonal to the Two-Point Touch Technique

    Science.gov (United States)

    Penrod, William M.

    2012-01-01

    The profession of orientation and mobility (O&M) is replete with literature describing specific cane techniques, strategies for teaching O&M to specific populations and age groups, rationales, and appropriate settings. These strategies and techniques are also addressed in many university preparation programs. In this article, the author discusses…

  5. Total Ossiculoplasty: Advantages of Two-Point Stabilization Technique

    Directory of Open Access Journals (Sweden)

    Leonard Berenholz

    2012-01-01

    Full Text Available Objective. Evaluate a porous polyethylene prosthesis with two-point stabilization in total ossiculoplasty. This approach utilizes a lateral as well as a medial graft to stabilize a total ossicular prosthesis (TOP. Study Design. Retrospective cohort review of total ossiculoplasty. Methods. All patients who underwent total ossiculoplasty during the years 2004–2007 were included in the study group. Only five patients (10% had primary surgery whereas 45 (90% underwent revision surgery. Cartilage grafts covering the prosthesis (Sheehy, Xomed laterally were used in all patients with areolar tissue being used for medial stabilization at the stapes footplate. Follow-up examination and audiometrics were performed a mean of 8.1 months following surgery. Results. The percentage of patients closing their ABG to within 10 dB was 44% with 66% closing their ABG to within 20 dB. The mean four-frequency hearing gain was 15.7 dB. The mean postoperative ABG was 15.7 dB. Conclusion. Audiometric results following total ossiculoplasty surgery using two-point stabilization exceeded results from the otologic literature. Proper two-point fixation with areolar tissue and stabilization utilizing cartilage were the keys to achieving a relatively high percentage of success in chronic ear disease in this sample.

  6. Extension of normal values on sensory function for facial areas using clinical tests on touch and two-point discrimination.

    Science.gov (United States)

    Vriens, J P M; van der Glas, H W

    2009-11-01

    The threshold value of a sensory test provides a numerical measure of the sensory function. In order to decide whether a threshold value from an affected site indicates 'abnormal' sensory function, it can be compared with normal values from a healthy control population. The aim of this study was to extend current information on normal values for static light touch and static two-point discrimination for facial sites. Using simple hand-held devices, 95% upper limits of confidence intervals of threshold values were determined for facial sites other than those studied previously and for a large sample of 100 healthy subjects. The MacKinnon-Dellon Disk-Criminator and the Aesthesiometer were used to measure novel normal values of two-point discrimination. As threshold values for two-point discrimination from the Aesthesiometer were similar to those obtained using the Disk-Criminator, the use of the Aesthesiometer might not be indicated. Apart from the Pressure Specified Sensory Device (a device with pressure control), Semmes-Weinstein nylon monofilaments and the Disk-Criminator are useful devices for studying sensory function, in particular under clinical test conditions in which easy and fast application are advantageous.

  7. Double swab technique for collecting touched evidence.

    Science.gov (United States)

    Pang, B C M; Cheung, B K K

    2007-07-01

    Touched evidence is often submitted to forensic laboratories for DNA analysis. Classical stain recovery technique, involving one wet cotton swab, is commonly used for recovering the touched evidence. Double swab technique, using a wet cotton swab followed by a dry cotton swab, was compared with the classical technique for recovering the touched evidence. The wet cotton swabs and the dry cotton swabs were individually extracted. DNA extracts were quantified and amplified at 15 polymorphic loci. DNA recovered in some of the second dry swabs contained sufficient amount of DNA to yield a DNA profile. This study shows that the double swab technique improves the quality of the resulting DNA profiles. The double swab technique for recovering touched evidence at crime scenes is recommended.

  8. New two-point scleral-fixation technique for foldable intraocular lenses with four hollow haptics.

    Science.gov (United States)

    Liu, He-Ting; Jiang, Zheng-Xuan; Tao, Li-Ming

    2016-01-01

    The study was to report a new two-point scleral-fixation technique for foldable intraocular lenses with four haptics. Lenses were slid into the anterior chamber from a 2.8 mm corneal incision and fixed under two sclera flaps at two opposite points. The postoperative best-corrected visual acuities (BCVAs) of all patients were significantly better than their preoperative BCVA. The results demonstrate that two-point, scleral fixations of foldable, intraocular lenses might be practicable and effective.

  9. An improved iterative technique for solving nonlinear doubly singular two-point boundary value problems

    Science.gov (United States)

    Roul, Pradip

    2016-06-01

    This paper presents a new iterative technique for solving nonlinear singular two-point boundary value problems with Neumann and Robin boundary conditions. The method is based on the homotopy perturbation method and the integral equation formalism in which a recursive scheme is established for the components of the approximate series solution. This method does not involve solution of a sequence of nonlinear algebraic or transcendental equations for the unknown coefficients as in some other iterative techniques developed for singular boundary value problems. The convergence result for the proposed method is established in the paper. The method is illustrated by four numerical examples, two of which have physical significance: The first problem is an application of the reaction-diffusion process in a porous spherical catalyst and the second problem arises in the study of steady-state oxygen-diffusion in a spherical cell with Michaelis-Menten uptake kinetics.

  10. On the solution of two-point linear differential eigenvalue problems. [numerical technique with application to Orr-Sommerfeld equation

    Science.gov (United States)

    Antar, B. N.

    1976-01-01

    A numerical technique is presented for locating the eigenvalues of two point linear differential eigenvalue problems. The technique is designed to search for complex eigenvalues belonging to complex operators. With this method, any domain of the complex eigenvalue plane could be scanned and the eigenvalues within it, if any, located. For an application of the method, the eigenvalues of the Orr-Sommerfeld equation of the plane Poiseuille flow are determined within a specified portion of the c-plane. The eigenvalues for alpha = 1 and R = 10,000 are tabulated and compared for accuracy with existing solutions.

  11. A Touch Sensing Technique Using the Effects of Extremely Low Frequency Fields on the Human Body.

    Science.gov (United States)

    Elfekey, Hatem; Bastawrous, Hany Ayad; Okamoto, Shogo

    2016-12-02

    Touch sensing is a fundamental approach in human-to-machine interfaces, and is currently under widespread use. Many current applications use active touch sensing technologies. Passive touch sensing technologies are, however, more adequate to implement low power or energy harvesting touch sensing interfaces. This paper presents a passive touch sensing technique based on the fact that the human body is affected by the surrounding extremely low frequency (ELF) electromagnetic fields, such as those of AC power lines. These external ELF fields induce electric potentials on the human body-because human tissues exhibit some conductivity at these frequencies-resulting in what is called AC hum. We therefore propose a passive touch sensing system that detects this hum noise when a human touch occurs, thus distinguishing between touch and non-touch events. The effectiveness of the proposed technique is validated by designing and implementing a flexible touch sensing keyboard.

  12. A Touch Sensing Technique Using the Effects of Extremely Low Frequency Fields on the Human Body

    Directory of Open Access Journals (Sweden)

    Hatem Elfekey

    2016-12-01

    Full Text Available Touch sensing is a fundamental approach in human-to-machine interfaces, and is currently under widespread use. Many current applications use active touch sensing technologies. Passive touch sensing technologies are, however, more adequate to implement low power or energy harvesting touch sensing interfaces. This paper presents a passive touch sensing technique based on the fact that the human body is affected by the surrounding extremely low frequency (ELF electromagnetic fields, such as those of AC power lines. These external ELF fields induce electric potentials on the human body—because human tissues exhibit some conductivity at these frequencies—resulting in what is called AC hum. We therefore propose a passive touch sensing system that detects this hum noise when a human touch occurs, thus distinguishing between touch and non-touch events. The effectiveness of the proposed technique is validated by designing and implementing a flexible touch sensing keyboard.

  13. Effectiveness of the Touch Math Technique in Teaching Basic Addition to Children with Autism

    Science.gov (United States)

    Yikmis, Ahmet

    2016-01-01

    This study aims to reveal whether the touch math technique is effective in teaching basic addition to children with autism. The dependent variable of this study is the children's skills to solve addition problems correctly, whereas teaching with the touch math technique is the independent variable. Among the single-subject research models, a…

  14. Design and Evaluation of 3D Positioning Techniques for Multi-touch Displays

    OpenAIRE

    Martinet, Anthony; Casiez, Gery; Grisoni, Laurent

    2009-01-01

    Multi-touch displays represent a promising technology for the display and manipulation of 3D data. To fully exploit their capabilities, appropriate interaction techniques must be designed. In this paper, we explore the design of free 3D positioning techniques for multi-touch displays to exploit the additional degrees of freedom provided by this technology. We present a first interaction technique to extend the standard four viewports technique found in commercial CAD applications and a second...

  15. Reducing intimal hyperplasia in vein grafts harvested by a no-touch harvesting technique

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Objective To investigate the effect of no-touch harvesting technique in reducing vein graft intimal hyperplasia. Methods This longitudinal trial compared graft angiostenosis of two groups undergoing jugular vein to carotid artery interposition grafting in rabbit model. Conventional group:12 rabbits had their veins stripped,distended,and stored in heparinized saline solution. No-touch group:12 rabbits had veins removed with surrounding tissues,but were not distended,and stored in heparinized blood. The graft...

  16. Comparing Four Touch-Based Interaction Techniques for an Image-Based Audience Response System

    NARCIS (Netherlands)

    Jorritsma, Wiard; Prins, Jonatan T.; van Ooijen, Peter M. A.

    2015-01-01

    This study aimed to determine the most appropriate touch-based interaction technique for I2Vote, an image-based audience response system for radiology education in which users need to accurately mark a target on a medical image. Four plausible techniques were identified: land-on, take-off, zoom-poin

  17. Evaluation of "no touch" extubation technique on airway-related complications during emergence from general anesthesia

    Directory of Open Access Journals (Sweden)

    Saad A Sheta

    2011-01-01

    Full Text Available Background and Objectives: Awake "no touch" extubation requires performing extubations only when the patient spontaneously wakes up without any kind of stimulation during emergence from general anesthesia. The aim of this study was to evaluate absolutely awake extubation "no touch" technique in adult patients, scheduled for elective nasal and paranasal sinus surgeries under general anesthesia as regard to emergence airway complications. Methods: A total of 60 adult patients were randomly allocated into one of two equal groups according to the method of extubation: Group I: Standard fully awake, Group II: Absolutely "no touch" awake extubation (absolutely no stimulation "no touch" was allowed until patients were able to open their eyes. The incidence of laryngospasm and its grade according to a four-point scale was reported. Occurrence of airway events (excessive secretions, breath-holding, coughing, hoarseness, biting, as well as the number and severity of any desaturation episodes, oozing from the wound, and postoperative sore throat were also recorded. The heart rate (HR, systolic (SBP and diastolic (DBP blood pressure measured at the end of surgery served as baseline values, and subsequent measurements were taken within 30 minutes after the end of surgery. Results: There was absolutely no case of laryngeal spasm or episode of desaturation among patients who were extubated with the "no touch" technique. On the other hand, there were 3 cases of laryngeal spasm in standard fully awake group. Severity of coughing, excessive secretions and breath holding, hoarseness, biting, and occurrence of non-purposeful movements of the limbs were significantly less in the absolutely "no touch" awake technique. The changes in HR, SBP, and DBP during emergence extubation were significantly less in "no touch" technique group. However, oozing from the wound was significantly higher with standard fully awake extubation. However, there were no significant

  18. Reducing intimal hyperplasia in vein grafts harvested by a no-touch harvesting technique

    Institute of Scientific and Technical Information of China (English)

    Hai-chen Wang; Wu-jun Xue; Miao-miao Liu

    2009-01-01

    Objective To investigate the effect of no-tonch harvesting technique in reducing vein graft intimal hyperplasin. A4othods This longitudinal trial compared graft ungiestenosis of two groups undergoing jugular vein to carotid artery interposition grafting in rabbit model. Conventional group: 12 rabbits had their veins stripped, distended, and stored in heparinized saline solution. No-touch group: 12 rabbits had veins removed with surrounding tissues, but were not distended, and stored in heparinized blood. The grafts were removed 4 weeks following grafting, and morphometry and immunohistochemistry assessment were performed. Results The intimal thickness, degree of anginstennsis and proliferation index of vascular smooth muscle cells of no-touch group were significantly reduced (P< 0.01) compared with those of the conventional group. The proliferating cell nuclear antigen pnsitive-staining cells were significantly increased (P<0.01) in the conventional group compared with whose in the no-touch group. Conclusion Harvesting the vein graft with no-touch harvesting technique could significantly reduce intimul hyperpinsin of the vein graft.

  19. Modification of the No-Touch Technique during Renal Artery Stenting

    Directory of Open Access Journals (Sweden)

    John A. Stathopoulos

    2013-01-01

    Full Text Available Renal artery stenting has been established as the primary form of renal artery stenosis revascularization procedure. The no-touch technique is proposed in order to avoid renal artery injury and atheroembolism during renal artery stenting. We describe a modification of the no-touch technique by using an over-the-wire (OTW balloon or a Quickcross catheter with a coronary wire inside, instead of the rigid  J wire. The reported technique, while it prevents direct contact of the guiding catheter with the aortic wall, at the same time it allows for a closer contact with the renal arterial ostium and a more favorable guiding catheter orientation, compared to what is achieved with the use of the more rigid  J wire, thus improving visualization, reducing the amount of contrast required, and potentially decreasing complications.

  20. Vision-Based Finger Detection, Tracking, and Event Identification Techniques for Multi-Touch Sensing and Display Systems

    Directory of Open Access Journals (Sweden)

    Yang-Lang Chang

    2011-07-01

    Full Text Available This study presents efficient vision-based finger detection, tracking, and event identification techniques and a low-cost hardware framework for multi-touch sensing and display applications. The proposed approach uses a fast bright-blob segmentation process based on automatic multilevel histogram thresholding to extract the pixels of touch blobs obtained from scattered infrared lights captured by a video camera. The advantage of this automatic multilevel thresholding approach is its robustness and adaptability when dealing with various ambient lighting conditions and spurious infrared noises. To extract the connected components of these touch blobs, a connected-component analysis procedure is applied to the bright pixels acquired by the previous stage. After extracting the touch blobs from each of the captured image frames, a blob tracking and event recognition process analyzes the spatial and temporal information of these touch blobs from consecutive frames to determine the possible touch events and actions performed by users. This process also refines the detection results and corrects for errors and occlusions caused by noise and errors during the blob extraction process. The proposed blob tracking and touch event recognition process includes two phases. First, the phase of blob tracking associates the motion correspondence of blobs in succeeding frames by analyzing their spatial and temporal features. The touch event recognition process can identify meaningful touch events based on the motion information of touch blobs, such as finger moving, rotating, pressing, hovering, and clicking actions. Experimental results demonstrate that the proposed vision-based finger detection, tracking, and event identification system is feasible and effective for multi-touch sensing applications in various operational environments and conditions.

  1. Early Results Show Reduced Infection Rate Using No-touch Technique for Expander/ADM Breast Reconstruction

    OpenAIRE

    Henry B. Wilson, MD, FACS

    2015-01-01

    Summary: Infection is a common complication of immediate breast reconstruction that often leads to device removal, a result emotionally devastating to the patient and frustrating for her surgeon. “No-touch” techniques have been used in other surgical disciplines and plastic surgery, but they have not been reported for breast reconstruction with tissue expanders or implants and acellular dermis. We report a novel technique of tissue expander and acellular dermis placement using no-touch princi...

  2. Measurement of elasticity of normal placenta using the Virtual Touch quantification technique

    Energy Technology Data Exchange (ETDEWEB)

    Wu, Size; Nan, Ruixia; Cui, Xiao Jing; Liang, Xian; Zhao, Yanan [Dept. of Ultrasound, Affiliated Hospital of Hainan Medical College, Haikou (China); Li, Yueping [Dept. of Obstetrics and Gynecology, Affiliated Hospital of Hainan Medical College, Haikou (China)

    2016-07-15

    The aim of this study was to measure the elasticity of normal placentas using the Virtual Touch quantification (VTQ) technique. This study was approved by the Institutional Ethics Committee. Fifty randomly selected, healthy pregnant women in their second trimester and 50 randomly selected, healthy pregnant women in their third trimester with a single fetus were included, and their placentas underwent VTQ through shear wave velocity (SWV) measurements. The measurements were performed at different locations to sample different areas of the placenta. Measurements were performed 3-4 times in each location, the mean shear wave velocities were calculated without the highest and lowest values of measurements in each region, and the results were compared. The SWV of the placenta was 0.983±0.260 m/sec, and the minimal and maximal speed was 0.63 m/sec and 1.84 m/sec, respectively. There was no significant difference between the second and third trimester of VTQ of the placenta in terms of SWV (0.978±0.255 m/sec vs. 0.987±0.266 m/sec, P=0.711). The maternal age between second and third trimester was 27.9±4.3 years and 29.2±4.4 years, respectively; there was no significant difference between them (P=0.159). The results of this study show that the SWV of normal placenta tissue is 0.983±0.260 m/sec, it has little variation between the second and third trimesters, and the VTQ technique may potentially play an additional role in placenta evaluation.

  3. Early Results Show Reduced Infection Rate Using No-touch Technique for Expander/ADM Breast Reconstruction

    Directory of Open Access Journals (Sweden)

    Henry B. Wilson, MD, FACS

    2015-03-01

    Full Text Available Summary: Infection is a common complication of immediate breast reconstruction that often leads to device removal, a result emotionally devastating to the patient and frustrating for her surgeon. “No-touch” techniques have been used in other surgical disciplines and plastic surgery, but they have not been reported for breast reconstruction with tissue expanders or implants and acellular dermis. We report a novel technique of tissue expander and acellular dermis placement using no-touch principles with a self-retaining retractor system that holds promise to decrease infectious complications of breast reconstruction.

  4. Two-Point Fuzzy Ostrowski Type Inequalities

    Directory of Open Access Journals (Sweden)

    Muhammad Amer Latif

    2013-08-01

    Full Text Available Two-point fuzzy Ostrowski type inequalities are proved for fuzzy Hölder and fuzzy differentiable functions. The two-point fuzzy Ostrowski type inequality for M-lipshitzian mappings is also obtained. It is proved that only the two-point fuzzy Ostrowski type inequality for M-lipshitzian mappings is sharp and as a consequence generalize the two-point fuzzy Ostrowski type inequalities obtained for fuzzy differentiable functions.

  5. Touch Affordances

    Science.gov (United States)

    Slegers, Karin; de Roeck, Dries; Arnall, Timo

    The workshop “Touch Affordances” addresses a concept relevant to human computer interactions based on touch. The main topic is the challenge of applying the notion of affordances to domains related to touch interactions (e.g. (multi)touch screens, RFID & NFC, ubiquitous interfaces). The goals of this workshop are to launch a community of researchers, designers, etc. interested in this topic, to create a common understanding of the field of touch affordances and to generate ideas for new research areas for intuitive touch interactions. The workshop will be highly interactive and will have a creative, generative character.

  6. Validation of an endothelial roll preparation for Descemet Membrane Endothelial Keratoplasty by a cornea bank using "no touch" dissection technique.

    Science.gov (United States)

    Marty, Anne-Sophie; Burillon, Carole; Desanlis, Adeline; Damour, Odile; Kocaba, Viridiana; Auxenfans, Céline

    2016-06-01

    Descemet Membrane Endothelial Keratoplasty (DMEK) selectively replaces the damaged posterior part of the cornea. However, the DMEK technique relies on a manually-performed dissection that is time-consuming, requires training and presents a potential risk of endothelial graft damages leading to surgery postponement when performed by surgeons in the operative room. To validate precut corneal tissue preparation for DMEK provided by a cornea bank in order to supply a quality and security precut endothelial tissue. The protocol was a technology transfer from the Netherlands Institute for Innovative Ocular Surgery (NIIOS) to Lyon Cornea Bank, after formation in NIIOS to the DMEK "no touch" dissection technique. The technique has been validated in selected conditions (materials, microscope) and after a learning curve, cornea bank technicians prepared endothelial tissue for DMEK. Endothelial cells densities (ECD) were evaluated before and after preparation, after storage and transport to the surgery room. Microbiological and histological controls have been done. Twenty corneas were manually dissected; 18 without tears. Nineteen endothelial grafts formed a double roll. The ECD loss after cutting was 3.3 % (n = 19). After transportation 7 days later, we found an ECD loss of 25 % (n = 12). Three days after cutting and transportation, we found 2.1 % of ECD loss (n = 7). Histology found an endothelial cells monolayer lying on Descemet membrane. The mean thickness was 12 ± 2.2 µm (n = 4). No microbial contamination was found (n = 19). Endothelial roll stability has been validated at 3 days in our cornea bank. Cornea bank technicians trained can deliver to surgeons an ECD controlled, safety and ready to use endothelial tissue, for DMEK by "no touch" technique, allowing time saving, quality and security for surgeons.

  7. Virtual Touch

    DEFF Research Database (Denmark)

    Stenslie, Ståle

    The central focus of this thesis is the use and experience of touch in artistic, multimodal and computer-based environments. The haptic experience of touch is an area that has only received limited research-based interest. Touch is too often seen as the effect, and not the cause of our everyday...... Erotogod. The third chapter investigates the foundations of touch through a physiological and psychological approach. Chapter four presents an alternative haptic history of Virtual Realities through the presentation and discussion of several technological and artistic works that are computer......-based. In chapter five touch is approached from a theoretical point of view. It develops a theory of touch based on phenomenology and shows how this approach advances an embodied thinking. Chapter six presents practice-based experiments of touch through the Erotogod installation. The last and seventh part...

  8. Dream Touch

    Directory of Open Access Journals (Sweden)

    Gillian Beer

    2014-10-01

    Full Text Available During the nineteenth century people were relatively uninhibited in recounting their dreams and dream material is prominent in many literary texts of the period. Touch is often described as being relatively rare in dreams because of the need to be alert to an actual touch. However, touch is explored in dreams in works by, for example, Emily Brontë, Charles Dickens, Christina Rossetti, Edwin Abbott, and Thomas Hardy. A frequent Victorian explanation for dream experiences was indigestion and this raises questions about the degree to which experiences of inner touch are particularly disquieting. The article analyses a number of diverse texts in which touch disturbs the threshold between sleep and waking. It examines Victorian arguments connecting evolutionary theory and tactile experience.

  9. Two Point Pade Approximants and Duality

    CERN Document Server

    Banks, Tom

    2013-01-01

    We propose the use of two point Pade approximants to find expressions valid uniformly in coupling constant for theories with both weak and strong coupling expansions. In particular, one can use these approximants in models with a strong/weak duality, when the symmetries do not determine exact expressions for some quantity.

  10. Computational complexity for the two-point block method

    Science.gov (United States)

    See, Phang Pei; Majid, Zanariah Abdul

    2014-12-01

    In this paper, we discussed and compared the computational complexity for two-point block method and one-point method of Adams type. The computational complexity for both methods is determined based on the number of arithmetic operations performed and expressed in O(n). These two methods will be used to solve two-point second order boundary value problem directly and implemented using variable step size strategy adapted with the multiple shooting technique via three-step iterative method. Two numerical examples will be tested. The results show that the computational complexity of these methods is reliable to estimate the cost of these methods in term of the execution time. We conclude that the two-point block method has better computational performance compare to the one-point method as the total number of steps is larger.

  11. Two-point optical coherency matrix tomography.

    Science.gov (United States)

    Abouraddy, Ayman F; Kagalwala, Kumel H; Saleh, Bahaa E A

    2014-04-15

    The two-point coherence of an electromagnetic field is represented completely by a 4×4 coherency matrix G that encodes the joint polarization-spatial-field correlations. Here, we describe a systematic sequence of cascaded spatial and polarization projective measurements that are sufficient to tomographically reconstruct G--a task that, to the best of our knowledge, has not yet been realized. Our approach benefits from the correspondence between this reconstruction problem in classical optics and that of quantum state tomography for two-photon states in quantum optics. Identifying G uniquely determines all the measurable correlation characteristics of the field and, thus, lifts ambiguities that arise from reliance on traditional scalar descriptors, especially when the field's degrees of freedom are correlated or classically entangled.

  12. Optical touch screen based on waveguide sensing

    Science.gov (United States)

    Pedersen, Henrik C.; Jakobsen, Michael L.; Hanson, Steen G.; Mosgaard, Morten; Iversen, Theis; Korsgaard, Jorgen

    2011-08-01

    We disclose a simple, optical touch screen technique based on a planar injection molded polymer waveguide, a single laser, and a small linear detector array. The solution significantly reduces the complexity and cost as compared to existing optical touch technologies. Force detection of a touching finger is also demonstrated.

  13. Digging up Von Békésy: Funneling of Touches around the Body

    Directory of Open Access Journals (Sweden)

    Lisa M Pritchett

    2011-10-01

    Full Text Available We investigated a technique that can be used to place tactile stimuli on a continuum between two points using two tactors placed several centimeters apart. As von Békésy first described in 1959, when two pieces of skin several centimeters apart are simultaneously stimulated, a single touch is perceived at an intermediate location. When the relative intensity of the vibration of the two tactors is slowly adjusted from 1:0 to 0:1 a sensation is created of a touch moving across the skin. This has come to be known as the funneling illusion. We have characterized the funneling illusion on a variety of body parts including the hand, arm, wrist, head, torso, and legs. We show that the illusion is robust to a variety of vibration parameters, and demonstrate how it may be used for within modality touch discrimination and adjustment procedures.

  14. Automatic measurement of touch and release angles of the fetlock joint for lameness detection in dairy cattle using vision techniques.

    Science.gov (United States)

    Pluk, A; Bahr, C; Poursaberi, A; Maertens, W; van Nuffel, A; Berckmans, D

    2012-04-01

    This paper describes a synchronized measurement system combining image and pressure data to automatically record the angle of the metacarpus and metatarsus bones of the cow with respect to a vertical line, which is useful for lameness detection in dairy cattle. A camera system was developed to record the posture and movement of the cow and the timing and position of hoof placement and release were recorded using a pressure sensitive mat. Experiments with the automatic system were performed continuously on a farm in Ghent (Belgium) for 5 wk in September and October 2009. In total, 2,219 measurements were performed on 75 individual lactating Holstein cows. As a reference for the analysis of the calculated variables, the locomotion of the cows was visually scored from recorded videos by a trained observer into 3 classes of lameness [53.5% were scored with gait score (GS)1, 33.3% were scored with GS2, and 9.3% were scored with GS3]. The contact data of the pressure mat and the camera images recorded by the system were synchronized and combined to measure different angles of the legs of the cows, together with the range of motion of the leg. Significant differences were found between the different gait scores in the release angles of the front hooves, in the range of motion of the front hooves, and in the touch angles of the hind hooves. The contact data of the pressure mat and the camera images recorded by the system were synchronized and combined to measure different angles of the legs of the cows, together with the range of motion of the leg. With respect to the classification of lameness, the range of motion of the front hooves (42.1 and 42.8%) and the release angle of the front hooves (41.7 and 42.0%) were important variables. In 83.3% of the cows, a change in GS led to an increase in within-cow variance for the range of motion or the release angle of the front hooves. In 76.2% of the cows, an increase in GS led to a decrease in range of motion or an increase in

  15. Two-point orientation discrimination versus the traditional two-point test for tactile spatial acuity assessment.

    Science.gov (United States)

    Tong, Jonathan; Mao, Oliver; Goldreich, Daniel

    2013-01-01

    Two-point discrimination is widely used to measure tactile spatial acuity. The validity of the two-point threshold as a spatial acuity measure rests on the assumption that two points can be distinguished from one only when the two points are sufficiently separated to evoke spatially distinguishable foci of neural activity. However, some previous research has challenged this view, suggesting instead that two-point task performance benefits from an unintended non-spatial cue, allowing spuriously good performance at small tip separations. We compared the traditional two-point task to an equally convenient alternative task in which participants attempt to discern the orientation (vertical or horizontal) of two points of contact. We used precision digital readout calipers to administer two-interval forced-choice versions of both tasks to 24 neurologically healthy adults, on the fingertip, finger base, palm, and forearm. We used Bayesian adaptive testing to estimate the participants' psychometric functions on the two tasks. Traditional two-point performance remained significantly above chance levels even at zero point separation. In contrast, two-point orientation discrimination approached chance as point separation approached zero, as expected for a valid measure of tactile spatial acuity. Traditional two-point performance was so inflated at small point separations that 75%-correct thresholds could be determined on all tested sites for fewer than half of participants. The 95%-correct thresholds on the two tasks were similar, and correlated with receptive field spacing. In keeping with previous critiques, we conclude that the traditional two-point task provides an unintended non-spatial cue, resulting in spuriously good performance at small spatial separations. Unlike two-point discrimination, two-point orientation discrimination rigorously measures tactile spatial acuity. We recommend the use of two-point orientation discrimination for neurological assessment.

  16. Two-point orientation discrimination versus the traditional two-point test for tactile spatial acuity assessment

    Directory of Open Access Journals (Sweden)

    Jonathan eTong

    2013-09-01

    Full Text Available Two-point discrimination is widely used to measure tactile spatial acuity. The validity of the two-point threshold as a spatial acuity measure rests on the assumption that two points can be distinguished from one only when the two points are sufficiently separated to evoke spatially distinguishable foci of neural activity. However, some previous research has challenged this view, suggesting instead that two-point task performance benefits from an unintended non-spatial cue, allowing spuriously good performance at small tip separations. We compared the traditional two-point task to an equally convenient alternative task in which participants attempt to discern the orientation (vertical or horizontal of two points of contact. We used precision digital readout calipers to administer two-interval forced-choice versions of both tasks to 24 neurologically healthy adults, on the fingertip, finger base, palm, and forearm. We used Bayesian adaptive testing to estimate the participants’ psychometric functions on the two tasks. Traditional two-point performance remained significantly above chance levels even at zero point separation. In contrast, two-point orientation discrimination approached chance as point separation approached zero, as expected for a valid measure of tactile spatial acuity. Traditional two-point performance was so inflated at small point separations that 75%-correct thresholds could be determined on all tested sites for fewer than half of participants. The 95%-correct thresholds on the two tasks were similar, and correlated with receptive field spacing. In keeping with previous critiques, we conclude that the traditional two-point task provides an unintended non-spatial cue, resulting in spuriously good performance at small spatial separations. Unlike two-point discrimination, two-point orientation discrimination rigorously measures tactile spatial acuity. We recommend the use of two-point orientation discrimination for neurological

  17. Optical touch screen based on waveguide sensing

    DEFF Research Database (Denmark)

    Pedersen, Henrik Chresten; Jakobsen, Michael Linde; Hanson, Steen Grüner

    2011-01-01

    We disclose a simple, optical touch screen technique based on a planar injection molded polymer waveguide, a single laser, and a small linear detector array. The solution significantly reduces the complexity and cost as compared to existing optical touch technologies. Force detection of a touchin...... finger is also demonstrated....

  18. Flow speed measurement using two-point collective light scattering

    Energy Technology Data Exchange (ETDEWEB)

    Heinemeier, N.P

    1998-09-01

    Measurements of turbulence in plasmas and fluids using the technique of collective light scattering have always been plagued by very poor spatial resolution. In 1994, a novel two-point collective light scattering system for the measurement of transport in a fusion plasma was proposed. This diagnostic method was design for a great improvement of the spatial resolution, without sacrificing accuracy in the velocity measurement. The system was installed at the W7-AS steallartor in Garching, Germany, in 1996, and has been operating since. This master thesis is an investigation of the possible application of this new method to the measurement of flow speeds in normal fluids, in particular air, although the results presented in this work have significance for the plasma measurements as well. The main goal of the project was the experimental verification of previous theoretical predictions. However, the theoretical considerations presented in the thesis show that the method can only be hoped to work for flows that are almost laminar and shearless, which makes it of very small practical interest. Furthermore, this result also implies that the diagnostic at W7-AS cannot be expected to give the results originally hoped for. (au) 1 tab., 51 ills., 29 refs.

  19. Instant Sencha Touch

    CERN Document Server

    Dave, Hiren J

    2013-01-01

    Get to grips with a new technology, understand what it is and what it can do for you, and then get to work with the most important features and tasks. This book is a practical, step by step tutorial that will get you to use Sencha Touch core components quickly and efficiently.Instant Sencha Touch is for hobbyists who want to explore the capabilities of Sencha Touch. No prior knowledge of Sencha Touch is assumed. This book is simultaneously helpful for developers as well who want to quickly learn about Sencha Touch Framework. The book is structured in such a way that amateurs as well as experts

  20. Nova técnica cirúrgica de preparo da veia safena para revascularização do miocárdio sem manipulação direta - no-touch Novel no-touch technique of harvesting the saphenous vein for coronary artery bypass grafting

    Directory of Open Access Journals (Sweden)

    Fabio de Rueda

    2008-06-01

    Full Text Available FUNDAMENTO: Otimização da veia safena na revascularização miocárdica. OBJETIVO: Apresentar a técnica no-touch de preparo da veia safena. Essa técnica consiste na retirada da veia safena do seu leito, com um pedículo de tecido adiposo, protegendo-a contra espasmos, sendo desnecessário distendê-la. MÉTODOS: Estudo prospectivo e randomizado, incluindo 156 pacientes submetidos a cirurgia de revascularização miocárdica. Comparação da técnica no-touch com duas outras técnicas: convencional e intermediária. Procedeu-se à avaliação da morfologia endotelial, utilizando a microscopia. A perviabilidade das pontes foi determinada com exame angiográfico num período médio de 18 meses após a operação. A enzima óxido nítrico sintetase endotelial (eNOS foi identificada por meio do estudo imunohistoquímico. RESULTADOS: A avaliação morfológica mostrou integridade endotelial de 97% nas veias do grupo no-touch; enquanto quase metade da superfície endotelial das veias tratadas pelas outras técnicas exibiu ausência de células endoteliais. A angiografia revelou perviabilidade de 95,4% para as pontes do grupo no-touch, 88,9 e 86,2% para as pontes do grupo convencional e intermediária, respectivamente. O estudo imunohistoquímico revelou a presença da eNOS nas três camadas que compõem a parede da veia no grupo no-touch e redução dessa enzima no grupo convencional. CONCLUSÃO: A integridade endotelial e a atividade da eNOS foram melhor preservadas com o uso da técnica no-touch. A proteção mecânica fornecida pelo tecido gorduroso circundante à veia e a atividade vasodilatadora e bloqueadora da agregação plaquetária causada pelo óxido nítrico podem ser responsáveis pela proteção da veia contra o espasmo, como também por sua alta perviabilidade imediata.BACKGROUND: Optimization of the saphenous vein for myocardial revascularization. OBJECTIVE: To present the no-touch technique of the saphenous vein preparation. This

  1. Touch communicates distinct emotions.

    Science.gov (United States)

    Hertenstein, Matthew J; Keltner, Dacher; App, Betsy; Bulleit, Brittany A; Jaskolka, Ariane R

    2006-08-01

    The study of emotional signaling has focused almost exclusively on the face and voice. In 2 studies, the authors investigated whether people can identify emotions from the experience of being touched by a stranger on the arm (without seeing the touch). In the 3rd study, they investigated whether observers can identify emotions from watching someone being touched on the arm. Two kinds of evidence suggest that humans can communicate numerous emotions with touch. First, participants in the United States (Study 1) and Spain (Study 2) could decode anger, fear, disgust, love, gratitude, and sympathy via touch at much-better-than-chance levels. Second, fine-grained coding documented specific touch behaviors associated with different emotions. In Study 3, the authors provide evidence that participants can accurately decode distinct emotions by merely watching others communicate via touch. The findings are discussed in terms of their contributions to affective science and the evolution of altruism and cooperation. (c) 2006 APA, all rights reserved

  2. Holographic Two-Point Functions in Conformal Gravity

    CERN Document Server

    Ghodsi, Ahmad; Naseh, Ali

    2014-01-01

    In this paper we compute the holographic two-point functions of four dimensional conformal gravity. Precisely we calculate the two-point functions for Energy-Momentum (EM) and Partially Massless Response (PMR) operators that have been identified as two response functions for two independent sources in the dual CFT. The correlation function of EM with PMR tensors turns out to be zero which is expected according to the conformal symmetry. The two-point function of EM is that of a transverse and traceless tensor, and the two-point function of PMR which is a traceless operator contains two distinct parts, one for a transverse-traceless tensor operator and another one for a vector field, both of which fulfill criteria of a CFT. We also discuss about the unitarity of the theory.

  3. Kinaesthesia and Touching Reality

    Directory of Open Access Journals (Sweden)

    Roger Smith

    2014-10-01

    Full Text Available This article outlines the philosophical and historical background to nineteenth-century belief that the touch sense, specifically including kinaesthesia, gives special, or uniquely deep, access to the world. The argument associates touch with life itself. Victorian writers also tied the sense of movement and touch to an understanding of causation and the world as a system of forces. The conclusion points to the possible significance of the arguments for the modernist arts, especially dance.

  4. Inverted catenoid as a fluid membrane with two points pulled together.

    Science.gov (United States)

    Castro-Villarreal, Pavel; Guven, Jemal

    2007-07-01

    Under inversion in any (interior) point, a catenoid transforms into a deflated compact geometry which touches at two points (its poles). The catenoid is a minimal surface and, as such, is an equilibrium shape of a symmetric fluid membrane. The conformal symmetry of the Hamiltonian implies that inverted minimal surfaces are also equilibrium shapes. However, they will exhibit curvature singularities at their poles. Such singularities are the geometrical signature of the external forces required to pull the poles together. These forces will set up stresses in the inverted shapes. Tuning the force corresponds geometrically to the translation of the point of inversion. For any fixed surface area, there will be a maximum force. The associated shape is a symmetric discocyte. Lowering the external force will induce a transition from the discocyte to a cup-shaped stomatocyte.

  5. Sencha Touch cookbook

    CERN Document Server

    Kumar, Ajit

    2013-01-01

    The book is written in a Cookbook style, presenting examples in the style of recipes, allowing you to go directly to your topic of interest or follow topics throughout a chapter to gain in-depth knowledge.Sencha Touch Cookbook (2nd edition) is great for developers who are new to Sencha Touch and who are looking to get a good hold on what the Sencha Touch framework offers and how to use it to build a great touch-based mobile application running on different platforms. It is assumed that you will have some experience in HTML, CSS, DOM, and JavaScript. To truly appreciate the framework capability

  6. Mistakes and Pitfalls Associated with Two-Point Compression Ultrasound for Deep Vein Thrombosis

    Directory of Open Access Journals (Sweden)

    Tony Zitek, MD

    2016-03-01

    Full Text Available Introduction: Two-point compression ultrasound is purportedly a simple and accurate means to diagnose proximal lower extremity deep vein thrombosis (DVT, but the pitfalls of this technique have not been fully elucidated. The objective of this study is to determine the accuracy of emergency medicine resident-performed two-point compression ultrasound, and to determine what technical errors are commonly made by novice ultrasonographers using this technique. Methods: This was a prospective diagnostic test assessment of a convenience sample of adult emergency department (ED patients suspected of having a lower extremity DVT. After brief training on the technique, residents performed two-point compression ultrasounds on enrolled patients. Subsequently a radiology department ultrasound was performed and used as the gold standard. Residents were instructed to save videos of their ultrasounds for technical analysis. Results: Overall, 288 two-point compression ultrasound studies were performed. There were 28 cases that were deemed to be positive for DVT by radiology ultrasound. Among these 28, 16 were identified by the residents with two-point compression. Among the 260 cases deemed to be negative for DVT by radiology ultrasound, 10 were thought to be positive by the residents using two-point compression. This led to a sensitivity of 57.1% (95% CI [38.8-75.5] and a specificity of 96.1% (95% CI [93.8-98.5] for resident-performed two-point compression ultrasound. This corresponds to a positive predictive value of 61.5% (95% CI [42.8-80.2] and a negative predictive value of 95.4% (95% CI [92.9-98.0]. The positive likelihood ratio is 14.9 (95% CI [7.5-29.5] and the negative likelihood ratio is 0.45 (95% CI [0.29-0.68]. Video analysis revealed that in four cases the resident did not identify a DVT because the thrombus was isolated to the superior femoral vein (SFV, which is not evaluated by two-point compression. Moreover, the video analysis revealed that the

  7. Solvability for a Class of Abstract Two-Point Boundary Value Problems Derived from Optimal Control

    Directory of Open Access Journals (Sweden)

    Wang Lianwen

    2007-01-01

    Full Text Available The solvability for a class of abstract two-point boundary value problems derived from optimal control is discussed. By homotopy technique existence and uniqueness results are established under some monotonic conditions. Several examples are given to illustrate the application of the obtained results.

  8. Solvability for a Class of Abstract Two-Point Boundary Value Problems Derived from Optimal Control

    Directory of Open Access Journals (Sweden)

    Lianwen Wang

    2008-01-01

    Full Text Available The solvability for a class of abstract two-point boundary value problems derived from optimal control is discussed. By homotopy technique existence and uniqueness results are established under some monotonic conditions. Several examples are given to illustrate the application of the obtained results.

  9. Touch screens go optical

    DEFF Research Database (Denmark)

    Hanson, Steen Grüner; Jakobsen, Michael Linde; Pedersen, Henrik Chresten

    2012-01-01

    A simple optical implementation of a touch screen is made possible by disrupting the total internal reflection in a 2D waveguide.......A simple optical implementation of a touch screen is made possible by disrupting the total internal reflection in a 2D waveguide....

  10. A touch of gastronomy

    NARCIS (Netherlands)

    Spence, C.; Hobkinson, C.; Gallace, A.; Piqueras Fiszman, B.

    2013-01-01

    The last few years have seen a rapid growth of research interest in the study of the role of touch and oralsomatosensation in the experience of eating and drinking. The various ways in which the sense of touch can be used to enhance the diner’s/consumer’s experience in both everyday eating and drink

  11. Two-point functions on deformed space-time

    CERN Document Server

    Trampetic, Josip

    2014-01-01

    We present a review of one-loop photon (\\Pi) and neutrino (\\Sigma) two-point functions in a covariant and deformed U(1) gauge-theory on d-dimensional noncommutative spaces, determined by a constant antisymmetric tensor \\theta, and by a parameter-space (\\kappa_f,\\kappa_g), respectively. For the general fermion-photon S_f(\\kappa_f) and photon self-interaction S_g(\\kappa_g) the closed form results reveal two-point functions with all kind of pathological terms: the UV divergence, the quadratic UV/IR mixing terms as well as a logarithmic IR divergent term of the type ln(\\mu^2(\\theta p)^2). In addition, the photon-loop produces new tensor structures satisfying transversality condition by themselves. We show that the photon two-point function in four-dimensional Euclidean spacetime can be reduced to two finite terms by imposing a specific full rank of \\theta and setting deformation parameters (\\kappa_f,\\kappa_g)=(0,3). In this case the neutrino two-point function vanishes. Thus for a specific point (0,3) in the para...

  12. Similarity of solution branches for two-point semilinear problems

    Directory of Open Access Journals (Sweden)

    Philip Korman

    2003-02-01

    Full Text Available For semilinear autonomous two-point problems, we show that all Neumann branches and all Dirichlet branches with odd number of interior roots have the same shape. On the other hand, Dirichlet branches with even number of roots may look differently. While this result has been proved previously by Schaaf cite{S}, our approach appears to be simpler.

  13. Verified solutions of two-point boundary value problems for nonlinear oscillators

    Science.gov (United States)

    Bünger, Florian

    Using techniques introduced by Nakao [4], Oishi [5, 6] and applied by Takayasu, Oishi, Kubo [11, 12] to certain nonlinear two-point boundary value problems (see also Rump [7], Chapter 15), we provide a numerical method for verifying the existence of weak solutions of two-point boundary value problems of the form -u″ = a(x, u) + b(x, u)u‧, 0 b are functions that fulfill some regularity properties. The numerical approximation is done by cubic spline interpolation. Finally, the method is applied to the Duffing, the van der Pol and the Toda oscillator. The rigorous numerical computations were done with INTLAB [8].

  14. Adaptation of a two-point boundary value problem solver to a vector-multiprocessor environment

    Energy Technology Data Exchange (ETDEWEB)

    Wright, S.J. (Mathematics Dept., North Carolina State Univ., Raleigh, NC (US)); Pereyra, V. (Weidlinger Associates, Los Angeles, CA (US))

    1990-05-01

    Systems of linear equations arising from finite-difference discretization of two-point boundary value problems have coefficient matrices that are sparse, with most or all of the nonzeros clustered in blocks near the main diagonal. Some efficiently vectorizable algorithms for factorizing these types of matrices and solving the corresponding linear systems are described. The relative effectiveness of the different algorithms varies according to the distribution of initial, final, and coupled end conditions. The techniques described can be extended to handle linear systems arising from other methods for two-point boundary value problems, such as multiple shooting and collocation. An application to seismic ray tracing is discussed.

  15. A touch of affect: mediated social touch and affect

    NARCIS (Netherlands)

    Huisman, Gijs

    2012-01-01

    This position paper outlines the first stages in an ongoing PhD project on mediated social touch, and the effects mediated touch can have on someone's affective state. It is argued that touch is a profound communication channel for humans, and that communication through touch can, to some extent,

  16. In touch with reality

    African Journals Online (AJOL)

    Adele

    South African Psychiatry Review - November 2004. 26. In touch with reality ... The result of this is that South Africa's mental health services have not adapted to the .... social causes. Developmental causes, mental retardation, head- injury, “a ...

  17. Grab and Touch

    DEFF Research Database (Denmark)

    Pedersen, Esben Warming

    . In the area of touch interactions, we report on results from a study that investigated the influence of display orientation on users’ performance and satisfaction. Using a horizontal and a vertical touch screen, we studied 16 participants as they tapped, dragged, and interacted bimanually. Results show......Tangible user interfaces seek to make computing natural and ubiquitous by coupling digital information with physical objects. The thesis contributes to this field by presenting empirical research on tangible computing and touch interaction. In the area of tangible computing, the thesis first......, by supporting multi-touch control, and by allowing efficient interaction with multiple tangibles. These benefits were evaluated in a study that shows that rotation-based interactions were more efficient with Tangible Bots. A second study demonstrated usefulness by observing how electronic musicians use Tangible...

  18. Plug in and touch

    OpenAIRE

    Machal, Kaled

    2010-01-01

    Invention is a challenging task, special when there is a similar product in the market. There are numerous alike products in the market made for the same purpose but owned and invented from different manufactures. These comparable products have same functions but different shapes, looks, dimensions, materials, etc. The overflow of new touch screen devices in the market, which keeps increasing all the time, requires the consumers to buy new touch screen pen. Most of devices come with one t...

  19. Theory of resistor networks: the two-point resistance

    Energy Technology Data Exchange (ETDEWEB)

    Wu, F Y [Department of Physics, Northeastern University Boston, MA 02115 (United States)

    2004-07-02

    The resistance between two arbitrary nodes in a resistor network is obtained in terms of the eigenvalues and eigenfunctions of the Laplacian matrix associated with the network. Explicit formulae for two-point resistances are deduced for regular lattices in one, two and three dimensions under various boundary conditions including that of a Moebius strip and a Klein bottle. The emphasis is on lattices of finite sizes. We also deduce summation and product identities which can be used to analyse large-size expansions in two and higher dimensions.

  20. Two-point correlation functions in inhomogeneous and anisotropic cosmologies

    Science.gov (United States)

    Marcori, Oton H.; Pereira, Thiago S.

    2017-02-01

    Two-point correlation functions are ubiquitous tools of modern cosmology, appearing in disparate topics ranging from cosmological inflation to late-time astrophysics. When the background spacetime is maximally symmetric, invariance arguments can be used to fix the functional dependence of this function as the invariant distance between any two points. In this paper we introduce a novel formalism which fixes this functional dependence directly from the isometries of the background metric, thus allowing one to quickly assess the overall features of Gaussian correlators without resorting to the full machinery of perturbation theory. As an application we construct the CMB temperature correlation function in one inhomogeneous (namely, an off-center LTB model) and two spatially flat and anisotropic (Bianchi) universes, and derive their covariance matrices in the limit of almost Friedmannian symmetry. We show how the method can be extended to arbitrary N-point correlation functions and illustrate its use by constructing three-point correlation functions in some simple geometries.

  1. Helping Hands: Designing Video Games with Interpersonal Touch Interaction

    OpenAIRE

    Watts, Cody; Sharlin, Ehud; Woytiuk, Peter

    2010-01-01

    International audience; Increasingly, the movements of players' physical bodies are being used as a method of controlling and playing video games. This trend is evidenced by the recent development of interpersonal touch-based games; multiplayer games which players control by physically touching their partners. Although a small number of interpersonal touch-based games have recently been designed, the best practices for creating video games based on this unconventional interaction technique re...

  2. Two-point functions in (loop) quantum cosmology

    Energy Technology Data Exchange (ETDEWEB)

    Calcagni, Gianluca; Gielen, Steffen; Oriti, Daniele, E-mail: calcagni@aei.mpg.de, E-mail: gielen@aei.mpg.de, E-mail: doriti@aei.mpg.de [Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Muehlenberg 1, D-14476 Golm (Germany)

    2011-06-21

    The path-integral formulation of quantum cosmology with a massless scalar field as a sum-over-histories of volume transitions is discussed, with particular but non-exclusive reference to loop quantum cosmology. Exploiting the analogy with the relativistic particle, we give a complete overview of the possible two-point functions, pointing out the choices involved in their definitions, deriving their vertex expansions and the composition laws they satisfy. We clarify the origin and relations of different quantities previously defined in the literature, in particular the tie between definitions using a group averaging procedure and those in a deparametrized framework. Finally, we draw some conclusions about the physics of a single quantum universe (where there exist superselection rules on positive- and negative-frequency sectors and different choices of inner product are physically equivalent) and multiverse field theories where the role of these sectors and the inner product are reinterpreted.

  3. Two-point functions in (loop) quantum cosmology

    Energy Technology Data Exchange (ETDEWEB)

    Calcagni, Gianluca; Oriti, Daniele [Max-Planck-Institute for Gravitational Physics (Albert Einstein Institute), Am Muehlenberg 1, D-14476 Golm (Germany); Gielen, Steffen [Max-Planck-Institute for Gravitational Physics (Albert Einstein Institute), Am Muehlenberg 1, D-14476 Golm (Germany); DAMTP, Centre for Mathematical Sciences, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)

    2011-07-01

    We discuss the path-integral formulation of quantum cosmology with a massless scalar field as a sum-over-histories of volume transitions, with particular but non-exclusive reference to loop quantum cosmology (LQC). Exploiting the analogy with the relativistic particle, we give a complete overview of the possible two-point functions, pointing out the choices involved in their definitions, deriving their vertex expansions and the composition laws they satisfy. We clarify the origin and relations of different quantities previously defined in the literature, in particular the tie between definitions using a group averaging procedure and those in a deparametrized framework. Finally, we draw some conclusions about the physics of a single quantum universe (where there exist superselection rules on positive- and negative-frequency sectors and different choices of inner product are physically equivalent) and multiverse field theories where the role of these sectors and the inner product are reinterpreted.

  4. Two-point Correlator Fits on HISQ Ensembles

    CERN Document Server

    Bazavov, A; Bouchard, C; DeTar, C; Du, D; El-Khadra, A X; Foley, J; Freeland, E D; Gamiz, E; Gottlieb, Steven; Heller, U M; Hetrick, J E; Kim, J; Kronfeld, A S; Laiho, J; Levkova, L; Lightman, M; Mackenzie, P B; Neil, E T; Oktay, M; Simone, J N; Sugar, R L; Toussaint, D; Van de Water, R S; Zhou, R

    2012-01-01

    We present our methods to fit the two point correlators for light, strange, and charmed pseudoscalar meson physics with the highly improved staggered quark (HISQ) action. We make use of the least-squares fit including the full covariance matrix of the correlators and including Gaussian constraints on some parameters. We fit the correlators on a variety of the HISQ ensembles. The lattice spacing ranges from 0.15 fm down to 0.06 fm. The light sea quark mass ranges from 0.2 times the strange quark mass down to the physical light quark mass. The HISQ ensembles also include lattices with different volumes and with unphysical values of the strange quark mass. We use the results from this work to obtain our preliminary results of $f_D$, $f_{D_s}$, $f_{D_s}/f_{D}$, and ratios of quark masses presented in another talk [1].

  5. GelTouch

    DEFF Research Database (Denmark)

    Miruchna, Viktor; Walter, Robert; Lindlbauer, David

    2015-01-01

    We present GelTouch, a gel-based layer that can selectively transition between soft and stiff to provide tactile multi-touch feedback. It is flexible, transparent when not activated, and contains no mechanical, electromagnetic, or hydraulic components, resulting in a compact form factor (a 2mm thin...... touchscreen layer for our prototype). The activated areas can be morphed freely and continuously, without being limited to fixed, predefined shapes. GelTouch consists of a poly(N-isopropylacrylamide) gel layer which alters its viscoelasticity when activated by applying heat (>32 C). We present three different...... a tablet with 6x4 tactile areas, enabling a tactile numpad, slider, and thumbstick. We show that the gel is up to 25 times stiffer when activated and that users detect tactile features reliably (94.8%)....

  6. A rapid and accurate two-point ray tracing method in horizontally layered velocity model

    Institute of Scientific and Technical Information of China (English)

    TIAN Yue; CHEN Xiao-fei

    2005-01-01

    A rapid and accurate method for two-point ray tracing in horizontally layered velocity model is presented in this paper. Numerical experiments show that this method provides stable and rapid convergence with high accuracies, regardless of various 1-D velocity structures, takeoff angles and epicentral distances. This two-point ray tracing method is compared with the pseudobending technique and the method advanced by Kim and Baag (2002). It turns out that the method in this paper is much more efficient and accurate than the pseudobending technique, but is only applicable to 1-D velocity model. Kim(s method is equivalent to ours for cases without large takeoff angles, but it fails to work when the takeoff angle is close to 90o. On the other hand, the method presented in this paper is applicable to cases with any takeoff angles with rapid and accurate convergence. Therefore, this method is a good choice for two-point ray tracing problems in horizontally layered velocity model and is efficient enough to be applied to a wide range of seismic problems.

  7. Taking Your iPod touch to the Max

    CERN Document Server

    Sadun, Erica

    2008-01-01

    Fast and fun to read, this title offers all the tips and techniques Apple iPod Touch users could ever think of to make the most of their device. Sadun reveals everything and more about the functionality of the iPod Touch.

  8. Touch Challenge ‘15: Recognizing Social Touch Gestures

    NARCIS (Netherlands)

    Jung, Merel Madeleine; Cang, Xi Laura; Poel, Mannes; MacLean, Karon E.

    2015-01-01

    Advances in the field of touch recognition could open up applications for touch-based interaction in areas such as Human-Robot Interaction (HRI). We extended this challenge to the research community working on multimodal interaction with the goal of sparking interest in the touch modality and to pro

  9. Getting in Touch

    Science.gov (United States)

    Dyrli, Kurt O.

    2008-01-01

    This article discusses the growing demand of using touchscreen interface. Consumers are now seeing touchscreens in a wide variety of electronics, not only in competitors to the iPhone from Sony, Samsung, Motorola, LG and T-Mobile, but also in desktop PCs, printers and copiers, televisions, and MP3 players. Teens, if they don't have a touch-enabled…

  10. Touched by Turner

    Science.gov (United States)

    Adams, Jeff

    2015-01-01

    This is a personal reflection on an encounter with the works of the nineteenth-century painter J. M. W. Turner in London's Tate Britain exhibition "Late Turner: Painting Set Free". The article discusses the deeply subjective nature of engaging with artworks, and touches upon theories that might account for the ineffable but moving…

  11. A multiscale two-point flux-approximation method

    Science.gov (United States)

    Møyner, Olav; Lie, Knut-Andreas

    2014-10-01

    A large number of multiscale finite-volume methods have been developed over the past decade to compute conservative approximations to multiphase flow problems in heterogeneous porous media. In particular, several iterative and algebraic multiscale frameworks that seek to reduce the fine-scale residual towards machine precision have been presented. Common for all such methods is that they rely on a compatible primal-dual coarse partition, which makes it challenging to extend them to stratigraphic and unstructured grids. Herein, we propose a general idea for how one can formulate multiscale finite-volume methods using only a primal coarse partition. To this end, we use two key ingredients that are computed numerically: (i) elementary functions that correspond to flow solutions used in transmissibility upscaling, and (ii) partition-of-unity functions used to combine elementary functions into basis functions. We exemplify the idea by deriving a multiscale two-point flux-approximation (MsTPFA) method, which is robust with regards to strong heterogeneities in the permeability field and can easily handle general grids with unstructured fine- and coarse-scale connections. The method can easily be adapted to arbitrary levels of coarsening, and can be used both as a standalone solver and as a preconditioner. Several numerical experiments are presented to demonstrate that the MsTPFA method can be used to solve elliptic pressure problems on a wide variety of geological models in a robust and efficient manner.

  12. A TOUCH-SENSITIVE DEVICE

    DEFF Research Database (Denmark)

    2009-01-01

    propagating towards a specific point of the detector array is prevented from being incident upon the specific point of the detector array when an object contacts a touch-sensitive surface of the touch-sensitive waveguide at a corresponding specific contact point.......The present invention relates to an optical touch-sensitive device and a method of determining a position and determining a position change of an object contacting an optical touch sensitive device. In particular, the present invention relates to an optical touch pad and a method of determining...... a position and determining a position change of an object contacting an optical touch pad. A touch-sensitive device, according to the present invention may comprise a light source, a touch- sensitive waveguide, a detector array, and a first light redirecting member, wherein at least a part of the light...

  13. Touch massage, a rewarding experience.

    Science.gov (United States)

    Lindgren, Lenita; Jacobsson, Maritha; Lämås, Kristina

    2014-12-01

    This study aims to describe and analyze healthy individuals' expressed experiences of touch massage (TM). Fifteen healthy participants received whole body touch massage during 60 minutes for two separate occasions. Interviews were analyzed by narrative analysis. Four identifiable storyline was found, Touch massage as an essential need, in this storyline the participants talked about a desire and need for human touch and TM. Another storyline was about, Touch massage as a pleasurable experience and the participants talked about the pleasure of having had TM. In the third storyline Touch massage as a dynamic experience, the informants talked about things that could modulate the experience of receiving TM. In the last storyline, Touch massage influences self-awareness, the participants described how TM affected some of their psychological and physical experiences. Experiences of touch massage was in general described as pleasant sensations and the different storylines could be seen in the light of rewarding experiences. © The Author(s) 2014.

  14. Seeing Touches Early in Life

    Science.gov (United States)

    Addabbo, Margaret; Longhi, Elena; Bolognini, Nadia; Senna, Irene; Tagliabue, Paolo; Macchi Cassia, Viola; Turati, Chiara

    2015-01-01

    The sense of touch provides fundamental information about the surrounding world, and feedback about our own actions. Although touch is very important during the earliest stages of life, to date no study has investigated infants’ abilities to process visual stimuli implying touch. This study explores the developmental origins of the ability to visually recognize touching gestures involving others. Looking times and orienting responses were measured in a visual preference task, in which participants were simultaneously presented with two videos depicting a touching and a no-touching gesture involving human body parts (face, hand) and/or an object (spoon). In Experiment 1, 2-day-old newborns and 3-month-old infants viewed two videos: in one video a moving hand touched a static face, in the other the moving hand stopped before touching it. Results showed that only 3-month-olds, but not newborns, differentiated the touching from the no-touching gesture, displaying a preference for the former over the latter. To test whether newborns could manifest a preferential visual response when the touched body part is different from the face, in Experiment 2 newborns were presented with touching/no-touching gestures in which a hand or an inanimate object—i.e., a spoon- moved towards a static hand. Newborns were able to discriminate a hand-to-hand touching gesture, but they did not manifest any preference for the object-to-hand touch. The present findings speak in favour of an early ability to visually recognize touching gestures involving the interaction between human body parts. PMID:26366563

  15. Seeing Touches Early in Life.

    Directory of Open Access Journals (Sweden)

    Margaret Addabbo

    Full Text Available The sense of touch provides fundamental information about the surrounding world, and feedback about our own actions. Although touch is very important during the earliest stages of life, to date no study has investigated infants' abilities to process visual stimuli implying touch. This study explores the developmental origins of the ability to visually recognize touching gestures involving others. Looking times and orienting responses were measured in a visual preference task, in which participants were simultaneously presented with two videos depicting a touching and a no-touching gesture involving human body parts (face, hand and/or an object (spoon. In Experiment 1, 2-day-old newborns and 3-month-old infants viewed two videos: in one video a moving hand touched a static face, in the other the moving hand stopped before touching it. Results showed that only 3-month-olds, but not newborns, differentiated the touching from the no-touching gesture, displaying a preference for the former over the latter. To test whether newborns could manifest a preferential visual response when the touched body part is different from the face, in Experiment 2 newborns were presented with touching/no-touching gestures in which a hand or an inanimate object-i.e., a spoon- moved towards a static hand. Newborns were able to discriminate a hand-to-hand touching gesture, but they did not manifest any preference for the object-to-hand touch. The present findings speak in favour of an early ability to visually recognize touching gestures involving the interaction between human body parts.

  16. Designing Business Touch Screen Applications

    OpenAIRE

    Čeč, Neža

    2013-01-01

    This thesis covers conversion of a business application from a standard application to a touch screen version. The first part describes basic functional characteristics of touch screen applications, like their structure and user interaction. Later on we describe technological characteristics that cover different technologies and frameworks for developing touch screen applications. These theoretic chapters are followed by a practical example of converting a business application to a touch scre...

  17. State feedback control of surge oscillations of two-point mooring system

    Science.gov (United States)

    Mitra, R. K.; Banik, A. K.; Chatterjee, S.

    2017-01-01

    Stability analysis of surge oscillations of two-point mooring system under state feedback control with time-delay is investigated. The two-point mooring system is harmonically excited and essentially represents a strongly nonlinear Duffing oscillator. In this paper, a frequency domain based method viz. incremental harmonic balance method along with arc-length continuation technique (IHBC) is first employed to identify the primary and higher order subharmonic responses which may be present in such system. The IHBC is then reformulated in a manner to treat two-point mooring system under state feedback control with time-delay and is applied to obtain control of responses in an efficient and systematic way. The stability of uncontrolled responses for primary and higher order subharmonic oscillations is obtained by Floquet's theory using Hsu' scheme; whereas the stability of controlled responses is obtained by applying semi-discretization method for delay differential equation. The study focussed on the controlling primary, higher order subharmonics and chaotic responses by considering appropriate feedback gains and delay by way of (i) appreciable reduction of primary, subharmonic responses, (ii) exclusion of all higher order subharmonics 2T, 3T, 5T and 9T (1/n subharmonics or period-n solutions), and (iii) reduction of the extent of domain of all instability phenomena represented by various type of bifurcation of solutions, jump phenomena, chaotic responses etc. In the study, negative velocity feedback is observed to be much effective than state feedback for better controlling of surge oscillation of two-point mooring system. Also, the effect of larger gain values is investigated by an extensive parametric study for vibration control with different delay values.

  18. Instant website touch integration

    CERN Document Server

    Dickson, Alexander

    2013-01-01

    This book gives you a quick theoretical knowledge base before moving on to focus on task-based projects designed to keep you on your toes.This book is for web developers who have a working knowledge of JavaScript and the traditional way of writing web applications intended to be mouse-driven. A touch-enabled device is definitely recommended as well as a sense of adventure.

  19. Futures market efficiency diagnostics via temporal two-point correlations. Russian market case study

    OpenAIRE

    Mikhail Kopytin; Evgeniy Kazantsev

    2013-01-01

    Using a two-point correlation technique, we study emergence of market efficiency in the emergent Russian futures market by focusing on lagged correlations. The correlation strength of leader-follower effects in the lagged inter-market correlations on the hourly time frame is seen to be significant initially (2009-2011) but gradually goes down, as the erstwhile leader instruments -- crude oil, the USD/RUB exchange rate, and the Russian stock market index -- seem to lose the leader status. An i...

  20. Solving Directly Two Point Non Linear Boundary Value Problems Using Direct Adams Moulton Method

    Directory of Open Access Journals (Sweden)

    Zanariah A. Majid

    2011-01-01

    Full Text Available Problem statement: In this study, a direct method of Adams Moulton type was developed for solving non linear two point Boundary Value Problems (BVPs directly. Most of the existence researches involving BVPs will reduced the problem to a system of first order Ordinary Differential Equations (ODEs. This approach is very well established but it obviously will enlarge the systems of first order equations. However, the direct method in this research will solved the second order BVPs directly without reducing it to first order ODEs. Approach: Lagrange interpolation polynomial was applied in the derivation of the proposed method. The method was implemented using constant step size via shooting technique in order to determine the approximated solutions. The shooting technique will employ the Newton’s method for checking the convergent of the guessing values for the next iteration. Results: Numerical results confirmed that the direct method gave better accuracy and converged faster compared to the existing method. Conclusion: The proposed direct method is suitable for solving two point non linear boundary value problems.

  1. Two-point concrete resistivity measurements: interfacial phenomena at the electrode-concrete contact zone

    Science.gov (United States)

    McCarter, W. J.; Taha, H. M.; Suryanto, B.; Starrs, G.

    2015-08-01

    Ac impedance spectroscopy measurements are used to critically examine the end-to-end (two-point) testing technique employed in evaluating the bulk electrical resistivity of concrete. In particular, this paper focusses on the interfacial contact region between the electrode and specimen and the influence of contacting medium and measurement frequency on the impedance response. Two-point and four-point electrode configurations were compared and modelling of the impedance response was undertaken to identify and quantify the contribution of the electrode-specimen contact region on the measured impedance. Measurements are presented in both Bode and Nyquist formats to aid interpretation. Concretes mixes conforming to BSEN206-1 and BS8500-1 were investigated which included concretes containing the supplementary cementitious materials fly ash and ground granulated blast-furnace slag. A measurement protocol is presented for the end-to-end technique in terms of test frequency and electrode-specimen contacting medium in order to minimize electrode-specimen interfacial effect and ensure correct measurement of bulk resistivity.

  2. Sencha Touch cookbook

    CERN Document Server

    Kumar, Ajit

    2011-01-01

    The book is written in a cookbook style, presenting examples in the style of recipes, allowing you to go directly to your topic of interest, or follow topics throughout a chapter to gain in-depth knowledge. This book is ideal for anyone who wants to gain the practical knowledge involved in using Sencha Touch mobile web application framework to make attractive web apps for mobiles. If you have some familiarity with HTML and CSS, then this book is for you. This book will give designers the skills they need to implement their ideas, and provide developers with creative inspiration through practic

  3. Avaliação microscópica e ultra-estrutural do endotélio de veia safena preparada pela técnica "no touch" Microscopic and ultrastructural evaluation of the saphenous vein endothelium for CABG prepared by the no touch technique

    Directory of Open Access Journals (Sweden)

    Virgílio Figueiredo Silva

    2008-09-01

    Full Text Available OBJETIVO: O enxerto de veia safena (VS utilizado em revascularização miocárdica possui uma vida útil, sendo o estágio final a oclusão do vaso. Esforços em adquirir novas técnicas de coleta da VS podem possibilitar uma viabilidade maior do enxerto. MÉTODOS: Vinte pacientes foram randomizados e divididos em dois grupos com o objetivo de avaliação do endotélio vascular. A técnica "no touch" (NT consiste em retirar o segmento de VS com o tecido perivascular. A técnica convencional consiste em retirar a VS, com remoção "in situ" do tecido perivascular e conseqüente vasoespasmo. Houve um padrão de retirada das VS com incisões longitudinais escalonadas. Características da VS foram consideradas. A avaliação do endotélio das VS foi realizada usando microscópio eletrônico (ME pelo método de varredura e de transmissão. Cortes histológicos das VS foram corados em Hematoxilina-Eosina (HE. O colágeno subendotelial foi analisado pelos métodos de Picro-Sirius e Tricrômio de Masson. RESULTADOS: A ME evidenciou que o Grupo NT possui maiores áreas endoteliais não desnudadas, além de um menor número de células degradadas. A coloração em HE nos permitiu verificar a forma e a integridade das camadas das VS. Há um predomínio maior de fibras colágenas coradas no Grupo NT. CONCLUSÕES: A técnica NT permite uma melhor preservação endotelial da VS, sugerindo um enxerto mais viável em longo prazo.OBJECTIVE: Saphenous vein grafts (SV used in coronary artery bypass grafting have a limited life and vein occlusion may be the final adverse effect. Efforts to develop new techniques to harvest the saphenous vein may improve the viability of the graft. METHODS: Twenty patients were randomly divided into two groups with the objective of evaluating the vascular endothelium. The No Touch (NT technique consists in removing the saphenous vein with perivascular tissue. The conventional technique consists in harvesting with "in situ" removal

  4. A warm touch of affect?

    NARCIS (Netherlands)

    Willemse, Christian J.A.M.

    2015-01-01

    One of the research areas within affective Computer Mediated Communication currently under investigation is that of mediated social touch. A social touch is a complex composition of different physical parameters that can be simulated by haptic technologies. In this article we argue why we think it m

  5. Touching base with OPERA

    CERN Multimedia

    CERN Bulletin

    2011-01-01

    Three seminars – at CERN, at Gran Sasso and in Japan – and an article calling for the scrutiny of the scientific community: the OPERA Collaboration opened its research publicly. In addition to huge press coverage, this triggered welcome reactions from colleagues around the world, many of whom will attempt to independently interpret and reproduce the measurement. OPERA’s Spokesperson touches base with the Bulletin.   The CERN Main Auditorium was crowded as OPERA Physics co-ordinator Dario Autiero presented the results of their research (23 September 2011). According to the OPERA strategy, the results of the measurements are in the hands of the scientific community and, as for any other scientific result, several months will be needed before other groups will be able to perform an independent measurement. In the meantime, the OPERA Collaboration is dealing with an avalanche of emails from the scientific community, members of the general public, and the press. &...

  6. Feeling Touched: Emotional Modulation of Somatosensory Potentials to Interpersonal Touch

    Science.gov (United States)

    Ravaja, N.; Harjunen, V.; Ahmed, I.; Jacucci, G.; Spapé, M. M.

    2017-01-01

    Although the previous studies have shown that an emotional context may alter touch processing, it is not clear how visual contextual information modulates the sensory signals, and at what levels does this modulation take place. Therefore, we investigated how a toucher’s emotional expressions (anger, happiness, fear, and sadness) modulate touchee’s somatosensory-evoked potentials (SEPs) in different temporal ranges. Participants were presented with tactile stimulation appearing to originate from expressive characters in virtual reality. Touch processing was indexed using SEPs, and self-reports of touch experience were collected. Early potentials were found to be amplified after angry, happy and sad facial expressions, while late potentials were amplified after anger but attenuated after happiness. These effects were related to two stages of emotional modulation of tactile perception: anticipation and interpretation. The findings show that not only does touch affect emotion, but also emotional expressions affect touch perception. The affective modulation of touch was initially obtained as early as 25 ms after the touch onset suggesting that emotional context is integrated to the tactile sensation at a very early stage. PMID:28079157

  7. A High Performance Spread Spectrum Clock Generator Using Two-Point Modulation Scheme

    Science.gov (United States)

    Kao, Yao-Huang; Hsieh, Yi-Bin

    A new spread spectrum clock generator (SSCG) using two-point delta-sigma modulation is presented in this paper. Not only the divider is varied, but also the voltage controlled oscillator is modulated. This technique can enhance the modulation bandwidth so that the effect of EMI suppression is improved with lower order ΣΔ modulator and can simultaneously optimize the jitter and the modulation profile. In addition, the method of two-path is applied to the loop filter to reduce the capacitance value such that the total integration can be achieved. The proposed SSCG has been fabricated in a 0.35μm CMOS process. The clock of 400MHz with center spread ratios of 1.25% and 2.5% are verified. The peak EMI reduction is 19.73dB for the case of 2.5%. The size of chip area is 0.90×0.89mm2.

  8. Children’s Interaction Ability Towards Multi-Touch Gestures

    Directory of Open Access Journals (Sweden)

    Nor Hidayah Hussain

    2016-12-01

    Full Text Available The modern, powerful and multi-touch technology has gained attention among younger users. The devices are not only limited to entertainment purposes, but is also increasingly introduced for learning purposes at kindergartens and preschool. However, the number of studies that address the interaction of multi-touch gestures among kindergarten children are still limited. In fact, such interactions foster great learning potential in developmental skills for children. This paper specifically focuses on the priority of children’s interaction abilities towards multi-touch gestures such as rotation, zoom-in and zoom-out. This study had involved ten kindergarten children in a kindergarten located in Kajang, Selangor between ages of four to six years old. A direct observation technique was used in this study. The findings show three items from the aspects of motor and cognitive skills (such as touch input unable to reach screen sensitivity, unintentional touches and fingers touching the object inaccurately are the interaction ability that should be prioritized. Thus, this study suggests that the development of an adaptive multi-touch gestures application should be adapted into to children’s motor and cognitive skills, besides the other aspects.  

  9. Feeling Touched: Emotional Modulation of Somatosensory Potentials to Interpersonal Touch

    National Research Council Canada - National Science Library

    N Ravaja; V Harjunen; I Ahmed; G Jacucci; M M Spapé

    2017-01-01

    Although the previous studies have shown that an emotional context may alter touch processing, it is not clear how visual contextual information modulates the sensory signals, and at what levels does...

  10. Preparation of the saphenous vein for coronary artery bypass grafting: a new technique "no touch" that maintains the vein wall integral and provides high immediate patency Preparo da veia safena na cirurgia de revascularização miocárdica: uma nova técnica -"no touch"- que mantém a parede da veia íntegra e proporciona uma alta perviabilidade imediata

    Directory of Open Access Journals (Sweden)

    Domingos S. R. Souza

    2003-12-01

    Full Text Available BACKGROUND: The technique of harvesting the saphenous vein (SV for coronary artery bypass grafting (CABG influences the fate of vein grafts. A new "no touch" (NT technique of SV preparation was developed where the vein is harvested with a pedicle of surrounding tissue, which protects the vein from spasms therefore obviating the need for distension. METHOD: A prospective randomized study in 156 patients who underwent CABG was performed comparing three SV harvesting techniques. The techniques were conventional (c (adventitial stripping of the vein, manual distention and storing in saline solution; Intermediate (I (after adventitial stripping, the vein was left in situ, covered with a papaverine-soaked compress, and stored in heparinized blood; and "no touch" (SV dissected with its surrounding tissue was left in situ, covered with a saline-soaked compress and stored in heparinized blood. A morphological study of the endothelium was preformed using scanning electronic microscopy and an angiographic assessment of the vein graft patency was performed at 18 months mean follow-up time. Also an immunohistochemistry assessment was performed to identify the enzyme, nitric oxide synthase (NOS in the vein wall. RESULTS: The preservation of the endothelial cell integrity was greater with the "no touch" technique than with the other procedures. At angiographic follow up, the patency for NT was 95.4%, 88.9% for grafts in group C and 86.2% for grafts in group I. The immunohistochemistry assessment revealed NOS in all three layers of the vein wall that was prepared by the "no touch" technique. However, a great reduction of this enzyme in veins treated by the conventional technique was observed. CONCLUSION: The endothelial integrity and NOS activity were better preserved when using the "no touch" technique for vein graft harvesting. The vasorelaxation and thrombo-resistant activities of nitric oxide (NO may be responsible for the reduced of vasospasms and improved

  11. Entanglement entropy of fermionic quadratic band touching model

    Science.gov (United States)

    Chen, Xiao; Cho, Gil Young; Fradkin, Eduardo

    2014-03-01

    The entanglement entropy has been proven to be a useful tool to diagnose and characterize strongly correlated systems such as topologically ordered phases and some critical points. Motivated by the successes, we study the entanglement entropy (EE) of a fermionic quadratic band touching model in (2 + 1) dimension. This is a fermionic ``spinor'' model with a finite DOS at k=0 and infinitesimal instabilities. The calculation on two-point correlation functions shows that a Dirac fermion model and the quadratic band touching model both have the asymptotically identical behavior in the long distance limit. This implies that EE for the quadratic band touching model also has an area law as the Dirac fermion. This is in contradiction with the expectation that dense fermi systems with a finite DOS should exhibit LlogL violations to the area law of entanglement entropy (L is the length of the boundary of the sub-region) by analogy with the Fermi surface. We performed numerical calculations of entanglement entropies on a torus of the lattice models for the quadratic band touching point and the Dirac fermion to confirm this. The numerical calculation shows that EE for both cases satisfy the area law. We further verify this result by the analytic calculation on the torus geometry. This work was supported in part by the NSF grant DMR-1064319.

  12. Taking Your iPod touch to the Max

    CERN Document Server

    Sadun, Erica

    2010-01-01

    Unleash your iPhone and take it to the limit using secret tips and techniques from gadget hacker Erica Sadun. Fast and fun to read, Taking Your iPod touch 4 to the Max is fully updated to show you how get the most out of Apple's new OS 4. You'll find all the best undocumented tricks as well as the most efficient and enjoyable introduction to the iPhone available. Starting with an introduction to iPod touch 4 basics, you'll quickly move on to discover the iPod touch's hidden potential, like how to connect to a TV, get contract-free VOIP, and hack OS 4 so it will run apps on your iPod touch. Fro

  13. Assessing Performance of Multipurpose Reservoir System Using Two-Point Linear Hedging Rule

    Science.gov (United States)

    Sasireka, K.; Neelakantan, T. R.

    2017-07-01

    Reservoir operation is the one of the important filed of water resource management. Innovative techniques in water resource management are focussed at optimizing the available water and in decreasing the environmental impact of water utilization on the natural environment. In the operation of multi reservoir system, efficient regulation of the release to satisfy the demand for various purpose like domestic, irrigation and hydropower can lead to increase the benefit from the reservoir as well as significantly reduces the damage due to floods. Hedging rule is one of the emerging techniques in reservoir operation, which reduce the severity of drought by accepting number of smaller shortages. The key objective of this paper is to maximize the minimum power production and improve the reliability of water supply for municipal and irrigation purpose by using hedging rule. In this paper, Type II two-point linear hedging rule is attempted to improve the operation of Bargi reservoir in the Narmada basin in India. The results obtained from simulation of hedging rule is compared with results from Standard Operating Policy, the result shows that the application of hedging rule significantly improved the reliability of water supply and reliability of irrigation release and firm power production.

  14. Helping through touch: The embodiment of caring.

    Science.gov (United States)

    Peloquin, S M

    1989-12-01

    There is a power to touch, and a magic. Some call it mystery. The purpose of this paper is to reflect on the various meanings and uses of touch, particularly within the context of relationship and helping. There will be no attempt to formulate a protocol for touch or to lay claim to a definitive meaning for touch. Reflection about touch may instead clarify some of its meanings and dynamics while encouraging care providers to embrace the experience of helping-through-touch. This paper supports a considered use of empathie touch because of its power and its ability to embody care.

  15. Touch-less Fingerprint Analysis — A Review and Comparison

    Directory of Open Access Journals (Sweden)

    Prabhjot Kaur

    2012-06-01

    Full Text Available Touch-less fingerprint recognition system is a reliable alternative to conventional touch-based fingerprint recognition system. Touch-less system is different from conventional system in the sense that they make use of digital camera to acquire the fingerprint image where as conventional system uses live-acquisition techniques. The conventional fingerprint systems are simple but they suffer from various problems such as hygienic, maintenance and latent fingerprints. In this paper we present a review of touch-less fingerprint recognition systems that use digital camera. We present some challenging problems that occur while developing the touch-less system. These problems are low contrast between the ridge and the valley pattern on fingerprint image, non-uniform lighting, motion blurriness and defocus, due to less depth of field of digital camera. The touch-less fingerprint recognition system can be divided into three main modules: preprocessing, feature extraction and matching. Preprocessing is an important step prior to fingerprint feature extraction and matching. In this paper we put our more emphasis on preprocessing so that the drawbacks stated earlier can be removed. Further preprocessing is divided into four parts: first is normalization, second is fingerprint Segmentation, third is fingerprint enhancement and last is the core point detection. Feature extraction can be done by Gabor filter or by minutia extraction and the matching can be done by Support Vector Machine or Principal Component Analysis and three distance method.

  16. Attitude reconstruction of ROSETTA's Lander PHILAE using two-point magnetic field observations by ROMAP and RPC-MAG

    Science.gov (United States)

    Heinisch, Philip; Auster, Hans-Ulrich; Richter, Ingo; Hercik, David; Jurado, Eric; Garmier, Romain; Güttler, Carsten; Glassmeier, Karl-Heinz

    2016-08-01

    As part of the European Space Agency's ROSETTA Mission the Lander PHILAE touched down on comet 67P/Churyumov-Gerasimenko on November 12, 2014. The magnetic field has been measured onboard the orbiter and the lander. The orbiter's tri-axial fluxgate magnetometer RPC-MAG is one of five sensors of the ROSETTA Plasma Consortium. The lander is also equipped with a tri-axial fluxgate magnetometer as part of the ROSETTA Lander Magnetometer and Plasma-Monitor package (ROMAP). This unique setup makes a two point measurement between the two spacecrafts in a relatively small distance of less than 50 km possible. Both magnetometers were switched on during the entire descent, the initial touchdown, the bouncing between the touchdowns and after the final touchdown. We describe a method for attitude determination by correlating magnetic low-frequency waves, which was tested under different conditions and finally used to reconstruct PHILAE's attitude during descent and after landing. In these cases the attitude could be determined with an accuracy of better than ± 5 °. These results were essential not only for PHILAE operations planning but also for the analysis of the obtained scientific data, because nominal sources for this information, like solar panel currents and camera pictures could not provide sufficient information due to the unexpected landing position.

  17. Possible Complications of Ureteroscopy in Modern Endourological Era: Two-Point or “Scabbard” Avulsion

    Directory of Open Access Journals (Sweden)

    Andrius Gaizauskas

    2014-01-01

    Full Text Available Indication has led ureteroscopy to be a worldwide technique, with the expected appearance of multiple types of complications. Severe complications are possible including ureteral perforation or avulsion. Ureteral avulsion has been described as an upper urinary tract injury related to the action of blunt trauma, especially from traffic accidents, being the mechanism of injury, the result of an acute deceleration/acceleration movement. With the advent of endourology, that term is also applied to the extensive degloving injury resulting from a mechanism of stretching of the ureter that eventually breaks at the most weakened site, or ureteral avulsion is referred to as a discontinuation of the full thickness of the ureter. The paper presents a case report and literature review of the two-point or “scabbard” avulsion. The loss of long segment of the upper ureter, when end-to-end anastomosis is not technically feasible, presents a challenge to the urological surgeon. In the era of small calibre ureteroscopes these complications, due to growing incidence of renal stones will become more and more actual. Our message to other urologists is to know such a complication, to know the ways of treatment, and to analyse ureteroscopic signs, when to stop or pay attention.

  18. Analysis of errors in the measurement of energy dissipation with two-point LDA

    Energy Technology Data Exchange (ETDEWEB)

    Ducci, A.; Yianneskis, M. [Department of Mechanical Engineering, King' s College London, Experimental and Computational Laboratory for the Analysis of Turbulence (ECLAT), London (United Kingdom)

    2005-04-01

    In the present study, an attempt has been made to identify and quantify, with a rigorous analytical approach, all possible sources of error involved in the estimation of the fluctuating velocity gradients ({partial_derivative}u{sub i}/{partial_derivative}x{sub j}){sup 2} when a two-point laser Doppler velocimetry (LDV) technique is employed. Measurements were carried out in a grid-generated turbulence flow where the local dissipation rate can be calculated from the decay of kinetic energy. An assessment of the cumulative error determined through the analysis has been made by comparing the values of the spatial gradients directly measured with the gradient estimated from the decay of kinetic energy. The main sources of error were found to be related to the length of the two control volumes and to the fitting range, as well as the function used to interpolate the correlation coefficient when the Taylor length scale (or({partial_derivative}u{sub i}/{partial_derivative}x{sub j}){sup 2}) are estimated. (orig.)

  19. Finite-size scaling of two-point statistics and the turbulent energy cascade generators.

    Science.gov (United States)

    Cleve, Jochen; Dziekan, Thomas; Schmiegel, Jürgen; Barndorff-Nielsen, Ole E; Pearson, Bruce R; Sreenivasan, Katepalli R; Greiner, Martin

    2005-02-01

    Within the framework of random multiplicative energy cascade models of fully developed turbulence, finite-size-scaling expressions for two-point correlators and cumulants are derived, taking into account the observationally unavoidable conversion from an ultrametric to an Euclidean two-point distance. The comparison with two-point statistics of the surrogate energy dissipation, extracted from various wind tunnel and atmospheric boundary layer records, allows an accurate deduction of multiscaling exponents and cumulants, even at moderate Reynolds numbers for which simple power-law fits are not feasible. The extracted exponents serve as input for parametric estimates of the probabilistic cascade generator. Various cascade generators are evaluated.

  20. Touch for Socioemotional and Physical Well-Being: A Review

    Science.gov (United States)

    Field, Tiffany

    2010-01-01

    This review briefly summarizes recent empirical research on touch. The research includes the role of touch in early development, touch deprivation, touch aversion, emotions that can be conveyed by touch, the importance of touch for interpersonal relationships and how friendly touch affects compliance in different situations. MRI data are reviewed…

  1. Two-point L1 shortest path queries in the plane

    Directory of Open Access Journals (Sweden)

    Danny Z. Chen

    2016-12-01

    Full Text Available Let $P$ be a set of $h$ pairwise-disjoint polygonal obstacles with a total of $n$ vertices in the plane. We consider the problem of building a data structure that can quickly compute an $L_1$ shortest obstacle-avoiding path between any two  query points $s$ and $t$. Previously, a data structure of size $O(n^2\\log n$ was constructed in $O(n^2\\log^2 n$ time that answers each two-point query in $O(\\log^2 n+k$ time, i.e., the shortest path length is reported in $O(\\log^2 n$ time and an actual path is reported in additional $O(k$ time, where $k$ is the number of edges of the output path. In this paper, we build a new data structure of size $O(n+h^2 \\log h 4^{\\sqrt{\\log h}}$ in $O(n+h^2 \\log^{2}h 4^{\\sqrt{\\log h}}$ time that answers each query in $O(\\log n+k$ time. (In contrast, for the Euclidean version of this two-point query problem, the best known algorithm uses $O(n^{11}$ space to achieve an $O(\\log n+k$ query time. Further, we extend our techniques to the weighted rectilinear version in which the ``obstacles" of $P$ are rectilinear regions with ``weights" and allow $L_1$ paths to travel through them with weighted costs. Previously, a data structure of size $O(n^2\\log^2 n$ was built in $O(n^2\\log^2 n$ time that answers each query in $O(\\log^2 n+k$ time. Our new algorithm answers each query in $O(\\log n+k$ time with a data structure of size $O(n^2 \\log n 4^{\\sqrt{\\log n}}$ that is built in $O(n^2 \\log^2 n 4^{\\sqrt{\\log n}}$ time.

  2. Prospective comparison of liver stiffness measurements between two point wave elastography methods: Virtual ouch quantification and elastography point quantification

    Energy Technology Data Exchange (ETDEWEB)

    Yoo, Hyun Suk; Lee, Jeong Min; Yoon, Jeong Hee; Lee, Dong Ho; Chang, Won; Han, Joon Koo [Seoul National University Hospital, Seoul (Korea, Republic of)

    2016-09-15

    To prospectively compare technical success rate and reliable measurements of virtual touch quantification (VTQ) elastography and elastography point quantification (ElastPQ), and to correlate liver stiffness (LS) measurements obtained by the two elastography techniques. Our study included 85 patients, 80 of whom were previously diagnosed with chronic liver disease. The technical success rate and reliable measurements of the two kinds of point shear wave elastography (pSWE) techniques were compared by χ{sup 2} analysis. LS values measured using the two techniques were compared and correlated via Wilcoxon signed-rank test, Spearman correlation coefficient, and 95% Bland-Altman limit of agreement. The intraobserver reproducibility of ElastPQ was determined by 95% Bland-Altman limit of agreement and intraclass correlation coefficient (ICC). The two pSWE techniques showed similar technical success rate (98.8% for VTQ vs. 95.3% for ElastPQ, p = 0.823) and reliable LS measurements (95.3% for VTQ vs. 90.6% for ElastPQ, p = 0.509). The mean LS measurements obtained by VTQ (1.71 ± 0.47 m/s) and ElastPQ (1.66 ± 0.41 m/s) were not significantly different (p = 0.209). The LS measurements obtained by the two techniques showed strong correlation (r = 0.820); in addition, the 95% limit of agreement of the two methods was 27.5% of the mean. Finally, the ICC of repeat ElastPQ measurements was 0.991. Virtual touch quantification and ElastPQ showed similar technical success rate and reliable measurements, with strongly correlated LS measurements. However, the two methods are not interchangeable due to the large limit of agreement.

  3. Touch, compliance, and awareness of tactile contact.

    Science.gov (United States)

    Joule, Robert-Vincent; Guéguen, Nicolas

    2007-04-01

    Many experimental studies have shown that touch increases compliance with a request; however, the difference between the effect of touch on compliance between participants who notice and those who do not notice such contact remains in question. An experiment was conducted in which a female confederate asked 368 female smokers to give her a cigarette. In the Touch condition, when making her request, the confederate slightly touched the participant on her forearm. Analysis showed the touch was associated with significantly higher compliance to the request, and a difference was evident in the Touch condition between subjects who had noticed the tactile contact and those who had not.

  4. 声触诊组织定量技术在慢性肾病中的初步应用%Preliminary application of virtual touch tissue quantification technique in chronic kidney disease

    Institute of Scientific and Technical Information of China (English)

    王亮; 吕珂; 陈丽萌; 夏鹏; 姜玉新; 戴晴

    2014-01-01

    Objective To explore the value of virtual touch tissue quantification (VTQ) in assessment of renal tissue fibrosis in chronic kidney disease (CKD) patients.Methods Totally 45 patients with CKD confirmed by renal biopsies underwent conventional ultrasound and VTQ to measure their left renal cortical shear wave velocity (SWV) values,as well as renal length,cortical thickness,interlobar arterial resistive index.Correlation of SWV/conventional ultrasound indicators and patient's CKD stage/fibrosis indicators on histopathology were analyzed.Results The median SWV was (2.74 ± 0.57)cm/s,(2.30±0.27)cm/s,(2.85±0.26)cm/s and (2.60±0.40)cm/s for stage 1,2,3 and 4 in CKD patients respectively.And Spearman correlation analysis showed that SWV value had no correlation to any histopathological indicators of tissue fibrosis.Conclusion VTQ technique can assess the tissue stiffness of CKD kidneys by measuring cortical SWV values.However,SWV does not show significant correlations to CKD stage and fibrosis indicators.%目的 探讨声触诊组织定量(VTQ)技术评估慢性肾脏疾病(CKD)肾组织纤维化程度的价值.方法 对45例经肾组织活检证实的CKD患者进行VTQ以及常规超声检查.分析VTQ以及常规超声指标与患者临床及病理指标(CKD分期、肾小球硬化指数、肾小管萎缩面积以及肾间质纤维化面积)之间的相关性.结果 肾皮质SWV值CKD 1期为(2.74土0.57)cm/s,CKD 2期为(2.30土0.27)cm/s,CKD 3期为(2.85±0.26)cm/s,CKD 4期为(2.60士0.40) cm/s.统计分析显示肾皮质SWV值与CKD分期及病理指标间无相关性.讨论 VTQ技术可以测定的肾脏皮质的SWV值;但肾脏皮质SWV值与CKD分期及肾组织纤维化指标间无相关性.

  5. Value of no-touch isolation technique in radical resection for pancreatic head adenocarcinoma%无接触分离技术在胰头癌根治性切除术中应用价值探讨

    Institute of Scientific and Technical Information of China (English)

    仇爱峰; 王学斌; 王立胜; 施育华

    2010-01-01

    目的:研究无接触分离技术(no-touch isolation technique,NUT)在胰头癌根治性切除术中的应用,探讨以NUT技术为重点的胰十二指肠切除术对肿瘤转移及预后的影响.方法:对2004年2月~2009年9月施行胰十二指肠切除术的57例胰头癌患者进行对照研究.其中NUT组32例,常规手术组25例.测定手术病例肿瘤切除前、后门静脉血细胞角蛋白20(CK20)mRNA表达情况.分析两组生存期、肝转移率和死亡率.结果:两组患者术后并发症发生率无明显差异.切除肿瘤病灶前,门静脉血内CK20 mRNA的阳性表达率常规手术组和NUT组分别为16.00%,18.75%,无统计学差异.肿瘤切除后,常规手术组CK20 mRNA的阳性率显著高于NUT组(52.00%vs.25.00%,P=0.036).术后随访,NUT组、常规手术组术后1、3、5年生存率分别为76.6%,50.0%,40.0%和75.0%,33.3%,8.8%.NUT组5年生存率高于常规手术组(P=0.018).术后死亡原因分析显示NUT组肝转移率显著低于常规手术组(P=0.024).结论:胰头癌根治性切除术中采用NUT技术能有效减少癌细胞播散,减少术后肝转移发生率,改善预后.

  6. Touch imprint cytology: a rapid diagnostic tool for oral squamous cell carcinoma.

    Science.gov (United States)

    Geetha, L; Astekar, M; Ashok, K N; Sowmya, G V

    2015-07-01

    Techniques for intraoperative pathologic examination of oral squamous cell carcinoma are rare in the literature. We evaluated the advantages and limitations of touch imprint cytology for intraoperative diagnosis of oral squamous cell carcinoma. We used 30 incisional biopsies of clinically diagnosed oral squamous cell carcinoma and compared touch imprint cytology to histopathological sections. Touch imprint cytology showed 24 specimens positive for malignancy, two suspicious for malignancy and four inadequate specimens. The accuracy of the test was 93.2%. Touch imprint cytology is an accurate, simple, rapid and cost-effective method that aids diagnosis of oral squamous cell carcinoma during operation, but it does not replace incisional biopsy.

  7. Approach to the origin of turbulence on the basis of two-point kinetic theory

    Science.gov (United States)

    Tsuge, S.

    1974-01-01

    Equations for the fluctuation correlation in an incompressible shear flow are derived on the basis of kinetic theory, utilizing the two-point distribution function which obeys the BBGKY hierarchy equation truncated with the hypothesis of 'ternary' molecular chaos. The step from the molecular to the hydrodynamic description is accomplished by a moment expansion which is a two-point version of the thirteen-moment method, and which leads to a series of correlation equations, viz., the two-point counterparts of the continuity equation, the Navier-Stokes equation, etc. For almost parallel shearing flows the two-point equation is separable and reduces to two Orr-Sommerfeld equations with different physical implications.

  8. Energetic optimization of a piezo-based touch-operated button for man–machine interfaces

    NARCIS (Netherlands)

    Sun, Hao; Vries, de Theo J.A.; Vries, de Rene; Dalen, van Harry

    2012-01-01

    This paper discusses the optimization of a touch-operated button for man–machine interfaces based on piezoelectric energy harvesting techniques. In the mechanical button, a common piezoelectric diaphragm, is assembled to harvest the ambient energy from the source, i.e. the operator’s touch. Under to

  9. Energetic optimization of a piezo-based touch-operated button for man–machine interfaces

    NARCIS (Netherlands)

    de Vries, Theodorus J.A.; Sun, H.; de Vries, T.J.A.; de Vries, Rene; van Dalen, Harry

    2012-01-01

    This paper discusses the optimization of a touch-operated button for man–machine interfaces based on piezoelectric energy harvesting techniques. In the mechanical button, a common piezoelectric diaphragm, is assembled to harvest the ambient energy from the source, i.e. the operator’s touch. Under

  10. Systematic Touch Exploration as a Screening Procedure for Child Abuse: A Pilot Study.

    Science.gov (United States)

    Hewitt, Sandra K.; Arrowood, Alice A.

    1994-01-01

    Presents a systematic touch exploration format for screening child abuse. The technique involves simple drawings with child participation that review forms of touching in a child's life and screens for physical and emotional abuse as well. Comparisons between screening outcomes and completed case conclusions indicate a bias toward underreporting…

  11. Touch technologies in primary education

    DEFF Research Database (Denmark)

    Davidsen, Jacob

    This paper presents findings from a longitude project on children‘s use of interactive touchscreens in classroom-settings. By exploring and analysing interaction among pairs, children‘s collaborative activities are under study, and it is highlighted how touch technologies invites for a more...

  12. Chinese culture approached through touch

    DEFF Research Database (Denmark)

    Wang, Li; Champion, Erik

    2012-01-01

    Can recent technology help bridge cultures through playful interaction appropriate to traditional tacit means of acquiring knowledge? In order to help answer this question, we designed four Adobe Flash-based based game prototypes and evaluated them via a touch-screen PC. The goal was to offer non...

  13. Direct Learning in Dynamic Touch

    Science.gov (United States)

    Michaels, Claire F.; Arzamarski, Ryan; Isenhower, Robert W.; Jacobs, David M.

    2008-01-01

    A dynamic touch paradigm in which participants judged the lengths of rods and pipes was used to test the D. M. Jacobs and C. F. Michaels (2007) theory of perceptual learning. The theory portrays perception as the exploitation of a locus on an information manifold and learning as continuous movement across that manifold to a new locus, as guided by…

  14. Touch, and you will gaze

    DEFF Research Database (Denmark)

    Bruun, Anders; Hahn, Claudia; Voigt, Benjamin

    2013-01-01

    This study extends previous research by exploring the quality of the interaction experienced by a group of elderly participants interacting with a healthcare portal when applying a touch screen remote control. This is compared to a standard remote control with physical buttons....

  15. Physiological Effects of Touching Wood

    Directory of Open Access Journals (Sweden)

    Harumi Ikei

    2017-07-01

    Full Text Available This study aimed to clarify the physiological effects of touching wood with the palm, in comparison with touching other materials on brain activity and autonomic nervous activity. Eighteen female university students (mean age, 21.7  ±  1.6 years participated in the study. As an indicator of brain activity, oxyhemoglobin (oxy-Hb concentrations were measured in the left/right prefrontal cortex using near-infrared time-resolved spectroscopy. Heart rate variability (HRV was used as an indicator of autonomic nervous activity. The high-frequency (HF component of HRV, which reflected parasympathetic nervous activity, and the low-frequency (LF/HF ratio, which reflected sympathetic nervous activity, were measured. Plates of uncoated white oak, marble, tile, and stainless steel were used as tactile stimuli. After sitting at rest with their eyes closed, participants touched the materials for 90 s. As a result, tactile stimulation with white oak significantly (1 decreased the oxy-Hb concentration in the left/right prefrontal cortex relative to marble, tile, and stainless steel and (2 increased ln(HF-reflected parasympathetic nervous activity relative to marble and stainless steel. In conclusion, our study revealed that touching wood with the palm calms prefrontal cortex activity and induces parasympathetic nervous activity more than other materials, thereby inducing physiological relaxation.

  16. 声触诊组织定量技术对甲状腺弥漫性疾病的诊断价值%Application of virtual touch tissue quantification techniques in diffuse thyroid disease

    Institute of Scientific and Technical Information of China (English)

    林子梅; 房世保; 王建红; 孙咏梅

    2013-01-01

    目的 探讨声触诊组织定量技术在甲状腺弥漫性疾病的诊断及鉴别诊断中的价值.方法 比较分析157例甲状腺弥漫性疾病患者及50例甲状腺正常者的剪切波速度(SWV).结果 (1)21例原发性甲状腺功能亢进患者SWV(2.12±0.26) m/s,102例桥本甲状腺炎患者SWV(2.32±0.43) m/s,34例亚急性甲状腺炎患者SWV:24例显示“X,XX m/s”;余10例SWV:(2.90 ±0.76) m/s;病例组SWV:(2.34±0.53) m/s,50例甲状腺正常者SWV:(2.04±0.38) m/s;(2)病例组与对照组SWV比较差异有统计学意义(P<0.05),病例组三组分别与对照组SWV比较差异有统计学意义(P<0.05);(3)病例组三组组间SWV比较:原发性甲状腺功能亢进与桥本甲状腺炎SWV比较差异无统计学意义(P>0.05),原发性甲状腺功能亢进与亚急性甲状腺炎SWV比较差异有统计学意义(P<0.05),桥本甲状腺炎与亚急性甲状腺炎SWV比较差异有统计学意义(P<0.05).结论 声触诊组织定量技术对于甲状腺弥漫性疾病的诊断与鉴别诊断有一定的临床价值.%Objective To investigate the role of virtual touch tissue quantification techniques in diagnosis and differential diagnosis of diffuse thyroid disease.Methods 157 cases of diffuse thyroid disease patients and 50 control subjects were included in the study.Predictive value of shear wave velocity (SWV)was assessed after collected.Results (1)We found a statistically significant difference in SWV between subjects without thyroid pathology and those with thyroid pathology [(2.04 ± 0.38) m/s vs.(2.34 ± 0.53) m/s,P < 0.05].(2) The SWV was statistically significant lower in normal subjects vs.those with Hashimoto's thyroiditis [(2.04 ± 0.38)m/s vs.(2.32 ±0.43)m/s,P <0.05],with primary hyperthyroidism [(2.04 ± 0.38) m/s vs.(2.12 ±0.26) m/s,P <0.05] and with subacute thyroiditis [(2.04 ± 0.38) m/s vs.(2.90 ± 0.76) m/s,P < 0.05].(3) We also found a statistically significant difference in SWV between

  17. AGATE: Autonomous Go and Touch Exploration Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The innovation (AGATE, for Autonomous Go And Touch Exploration) will enable single-sol "go and touch" instrument placement from distances of up to five meters for...

  18. Gauge-fixing parameter dependence of two-point gauge variant correlation functions

    CERN Document Server

    Zhai, C

    1996-01-01

    The gauge-fixing parameter \\xi dependence of two-point gauge variant correlation functions is studied for QED and QCD. We show that, in three Euclidean dimensions, or for four-dimensional thermal gauge theories, the usual procedure of getting a general covariant gauge-fixing term by averaging over a class of covariant gauge-fixing conditions leads to a nontrivial gauge-fixing parameter dependence in gauge variant two-point correlation functions (e.g. fermion propagators). This nontrivial gauge-fixing parameter dependence modifies the large distance behavior of the two-point correlation functions by introducing additional exponentially decaying factors. These factors are the origin of the gauge dependence encountered in some perturbative evaluations of the damping rates and the static chromoelectric screening length in a general covariant gauge. To avoid this modification of the long distance behavior introduced by performing the average over a class of covariant gauge-fixing conditions, one can either choose ...

  19. iPod touch2

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    第二代的iPod touch三围分别为110mm×61.8mm×8mm,并且,其最薄处仅有1.9mm,薄得有些不可思议。与一代一样,iPod touch2配备了一块3.5英寸480×320分辨率的触摸大屏,支持AAC、MP3、Apple Lossiess、WAV等音乐格式和30fps VGA分辨率的视频格式。iPodtouch2的机身一侧有音量控制键和麦克风。除此之外,iPod touch2的WiFi天线设计得更加美观。

  20. Touch design and narrative interpretation

    DEFF Research Database (Denmark)

    Zhao, Sumin; Unsworth, Len

    2016-01-01

    Interactivity is often considered as the defining feature of a book app. However, what constitutes interactivity in the context of apps is not always clear. We postulate in this chapter a multimodal social semiotic theory of interactivity, which considers interactivity as not simply a function...... of technology, but also a resource for meaning making. We distinguish two basic types of interactivity—intra-text and extra-text—incorporated in the touch design, and explore the different functions they perform in a broad range of picture book apps. In particular, we look at the app version of The Heart...... and the Bottle in depth, and illustrate how interactive design elements help to create an interpretative possibility of the story. We suggest that a better understanding of interactive touch design would promote more effective adult-child interactions around mobile applications....

  1. Holographic two-point functions for 4d log-gravity

    CERN Document Server

    Johansson, Niklas; Zojer, Thomas

    2012-01-01

    We compute holographic one- and two-point functions of critical higher curvature gravity in four dimensions. The two most important operators are the stress tensor and its logarithmic partner, sourced by ordinary massless and by logarithmic non-normalisable gravitons, respectively. In addition, the logarithmic gravitons source two ordinary operators, one with spin-one and one with spin-zero. The one-point function of the stress tensor vanishes for all Einstein solutions, but has a non-zero contribution from logarithmic gravitons. The two-point functions of all operators match the expectations from a three-dimensional logarithmic conformal field theory.

  2. Numerical methods for stiff systems of two-point boundary value problems

    Science.gov (United States)

    Flaherty, J. E.; Omalley, R. E., Jr.

    1983-01-01

    Numerical procedures are developed for constructing asymptotic solutions of certain nonlinear singularly perturbed vector two-point boundary value problems having boundary layers at one or both endpoints. The asymptotic approximations are generated numerically and can either be used as is or to furnish a general purpose two-point boundary value code with an initial approximation and the nonuniform computational mesh needed for such problems. The procedures are applied to a model problem that has multiple solutions and to problems describing the deformation of thin nonlinear elastic beam that is resting on an elastic foundation.

  3. A Computationally Efficient Approach for Calculating Galaxy Two-Point Correlations

    CERN Document Server

    Demina, Regina; BenZvi, Segev; Hindrichs, Otto

    2016-01-01

    We develop a modification to the calculation of the two-point correlation function commonly used in the analysis of large scale structure in cosmology. An estimator of the two-point correlation function is constructed by contrasting the observed distribution of galaxies with that of a uniformly populated random catalog. Using the assumption that the distribution of random galaxies in redshift is independent of angular position allows us to replace pairwise combinatorics with fast integration over probability maps. The new method significantly reduces the computation time while simultaneously increasing the precision of the calculation.

  4. Voluntary self-touch increases body ownership

    Directory of Open Access Journals (Sweden)

    Masayuki eHara

    2015-10-01

    Full Text Available Experimental manipulations of body ownership have indicated that multisensory integration is central to forming bodily self-representation. Voluntary self-touch is a unique multisensory situation involving corresponding motor, tactile and proprioceptive signals. Yet, even though self-touch is frequent in everyday life, its contribution to the formation of body ownership is not well understood. Here we investigated the role of voluntary self-touch in body ownership using a novel adaptation of the rubber hand illusion (RHI, in which a robotic system and virtual reality allowed participants self-touch of real and virtual hands. In the first experiment, active and passive self-touch were applied in the absence of visual feedback. In the second experiment, we tested the role of visual feedback in this bodily illusion. Finally, in the third experiment, we compared active and passive self-touch to the classical RHI in which the touch is administered by the experimenter. We hypothesized that active self-touch would increase ownership over the virtual hand through the addition of motor signals strengthening the bodily illusion. The results indicated that active self-touch elicited stronger illusory ownership compared to passive self-touch and sensory only stimulation, and indicate an important role of active self-touch in the formation of bodily self.

  5. Explaining mirror-touch synesthesia.

    Science.gov (United States)

    Ward, Jamie; Banissy, Michael J

    2015-01-01

    Mirror-touch synesthesia (MTS) is the conscious experience of tactile sensations induced by seeing someone else touched. This paper considers two different, although not mutually exclusive, theoretical explanations and, in the final section, considers the relation between MTS and other forms of synesthesia and also other kinds of vicarious perception (e.g., contagious yawning). The Threshold Theory explains MTS in terms of hyper-activity within a mirror system for touch and/or pain. This offers a good account for some of the evidence (e.g., from fMRI) but fails to explain the whole pattern (e.g., structural brain differences outside of this system; performance on some tests of social cognition). The Self-Other Theory explains MTS in terms of disturbances in the ability to distinguish the self from others. This can be construed in terms of over-extension of the bodily self in to others, or as difficulties in the control of body-based self-other representations. In this account, MTS is a symptom of a broader cognitive profile. We suggest this meets the criteria for synesthesia, despite the proximal causal mechanisms remaining largely unknown, and that the tendency to localize vicarious sensory experiences distinguishes it from other kinds of seemingly related phenomena (e.g., non-localized affective responses to observing pain).

  6. Meta-conformal invariance and the boundedness of two-point correlation functions

    Science.gov (United States)

    Henkel, Malte; Stoimenov, Stoimen

    2016-11-01

    The covariant two-point functions, derived from Ward identities in direct space, can be affected by consistency problems and can become unbounded for large time- or space-separations. This difficulty arises for several extensions of dynamical scaling, for example Schrödinger-invariance, conformal Galilei invariance or meta-conformal invariance, but not for standard ortho-conformal invariance. For meta-conformal invariance in (1+1) dimensions, which acts as a dynamical symmetry of a simple advection equation, these difficulties can be cured by going over to a dual space and an extension of these dynamical symmetries through the construction of a new generator in the Cartan sub-algebra. This provides a canonical interpretation of meta-conformally covariant two-point functions as correlators. Galilei-conformal correlators can be obtained from meta-conformal invariance through a simple contraction. In contrast, by an analogus construction, Schrödinger-covariant two-point functions are causal response functions. All these two-point functions are bounded at large separations, for sufficiently positive values of the scaling exponents.

  7. Meta-conformal invariance and the boundedness of two-point correlation functions

    CERN Document Server

    Henkel, Malte

    2016-01-01

    The covariant two-point functions, derived from Ward identities in direct space, can be affected by consistency problems and can become unbounded for large time- or space-separations. This difficulty arises for several extensions of dynamical scaling, for example Schr\\"odinger-invariance, conformal Galilei invariance or meta-conformal invariance, but not for standard ortho-conformal invariance. For meta-conformal invariance in 1+1 dimensions, these difficulties can be cured by going over to a dual space and an extension of these dynamical symmetries through the construction of a new generator in the Cartan sub-algebra. This provides a canonical interpretation of meta-conformally covariant two-point functions as correlators. Galilei-conformal correlators can be obtained from meta-conformal invariance through a simple contraction. In contrast, by an analogus construction, Schr\\"odinger-covariant two-point functions are causal response functions. All these two-point functions are bounded at large separations, fo...

  8. Holographic two-point functions for 4d log-gravity

    NARCIS (Netherlands)

    Johansson, Niklas; Naseh, Ali; Zojer, Thomas

    2012-01-01

    We compute holographic one- and two-point functions of critical higher-curvature gravity in four dimensions. The two most important operators are the stress tensor and its logarithmic partner, sourced by ordinary massless and by logarithmic non-normalisable gravitons, respectively. In addition, the

  9. Two-point discrimination of the upper extremities of healthy Koreans in their 20's.

    Science.gov (United States)

    Koo, Ja-Pung; Kim, Soon-Hee; An, Ho-Jung; Moon, Ok-Gon; Choi, Jung-Hyun; Yun, Young-Dae; Park, Joo-Hyun; Min, Kyoung-Ok

    2016-03-01

    [Purpose] The present study attempted to measure two-point discrimination in the upper extremities of healthy Koreans in their 20's. [Subjects and Methods] Using a three-point esthesiometer, we conducted an experiment with a group of 256 college students (128 male and 128 female), attending N University in Chonan, Republic of Korea. [Results] Females showed two-point discrimination at a shorter distance than males at the following points: (i) 5 cm above the elbow joint, the middle part, and 5 cm below the shoulder joint of the anterior upper arm; (ii) 5 cm above the elbow joint and 5 cm below the shoulder joint of the posterior upper arm; (iii) 5 cm above the front of the wrist joint of the forearm; 5 cm below the elbow joint, the palmar part of the distal interphalangeal joint of the thumb, the dorsal part of the distal interphalangeal joint of the middle and little fingers. It was also found that females showed greater two-point discrimination than males in distal regions rather than proximal regions. [Conclusion] The findings of this study will help establish normal values for two-point discrimination of upper extremities of young Koreans in their 20's.

  10. Logarithmic two-Point Correlation Functions from a z = 2 Lifshitz Model

    NARCIS (Netherlands)

    Zingg, T.

    2013-01-01

    The Einstein-Proca action is known to have asymptotically locally Lifshitz spacetimes as classical solutions. For dynamical exponent z=2, two-point correlation functions for fluctuations around such a geometry are derived analytically. It is found that the retarded correlators are stable in the sens

  11. Problem with two-point conditions for parabolic equation of second order on time

    Directory of Open Access Journals (Sweden)

    M. M. Symotyuk

    2014-12-01

    Full Text Available The  correctness of a problem with two-point conditions ontime-variable and of  Dirichlet-type conditions  on spatialcoordinates for the linear  parabolic equations with variablecoefficients are established. The metric theorem on estimationsfrom below of small denominators of the problem (the notions of Hausdorff measure is proved.

  12. Surgical treatment of zygomatic bone fracture using two points fixation versus three point fixation-a randomised prospective clinical trial

    Directory of Open Access Journals (Sweden)

    Rana Majeed

    2012-04-01

    Full Text Available Abstract Background The zygoma plays an important role in the facial contour for both cosmetic and functional reasons; therefore zygomatic bone injuries should be properly diagnosed and adequately treated. Comparison of various surgical approaches and their complications can only be done objectively using outcome measurements which in turn require protocol management and long-term follow up. The preference for open reduction and internal fixation of zygomatic fractures at three points has continued to grow in response to observations of inadequate results from two point and one point fixation techniques. The objectives of this study were to compare the efficacy of zygomatic bone after treatment with ORIF using 2 point fixation and ORIF using 3 point fixation and compare the outcome of two procedures. Methods 100 patients were randomly divided equally into two groups. In group A, 50 patients were treated by ORIF using two point fixation by miniplates and in group B, 50 patients were treated by ORIF using three point fixation by miniplates. They were evaluated for their complications during and after surgery with their advantages and disadvantages and the difference between the two groups was observed. Results A total of 100 fractures were sustained. We found that postoperative complication like decreased malar height and vertical dystopia was more common in those patients who were treated by two point fixation than those who were treated with three point fixation. Conclusions Based on this study open reduction and internal fixation using three point fixation by miniplates is the best available method for the treatment zygomatic bone fractures.

  13. A study on the efficacy of touch therapy in pain relieve after cesarean section

    Directory of Open Access Journals (Sweden)

    Maryam Ravanipour

    2004-09-01

    Full Text Available Supporters of touch therapy claim it can treat and cure a wide variety of illnesses, including heart failure, diabetes and infections. The "theory" is that people who are ill have disturbed "energy fields," and that by moving trained hands over the patient's body (without contact, a touch therapist can detect malalignments and repattern energy fields to create "energy balance." In a quasi- experimental study, 30 subjects in 6 hours post cesarean section state were divided into therapeutic touch or placebo (speech induction groups in a university hospital. In order to assess the pain, Visual Analog scale (VAS was used, before and after intervention. The mean pain score decreased significantly only in the therapeutic touch group (50.66 to 39.53 p<0.01. In conclusion, it is recommended that therapeutic touch , as an attentive technique, can be used in pain relieve after cesarean section.

  14. 基于PLC和触摸屏技术的纸机多段速度控制系统设计%Design of Paper Machine Multi-speed Control System Based on PLC and Touch Screen Technique

    Institute of Scientific and Technical Information of China (English)

    高俊

    2011-01-01

    Most of the traditional paper machines are driven divisionally by multi-motor,with low intelleciual faculties,poor real-time control,low precision and efficiency.In order to overcome these shortcomings,the paper put forward a control system based on PLC and touch screen.The PLC is the core of the system,which stores,computes and transmits the real-time data collected from paper machine with the sensor to control the machine running.At the same time to communicate with the touch screen,the machine operating data is displayed in the form of a dynamic figure,and the preset parameters on the touch screen were accepted to control the executive component to realize"manmachine dialogue"function between the operators and the paper machine .The simulation commission proves,the system is simple and high intelligence,its application improves product quality and production efficiency,and to some extent,reduces energy loss.%设计了一种基于PLC和触摸屏技术的纸机多段速度控制系统.该系统以PLC为核心,对传感器采集的纸机实时数据进行存储、计算及传输,控制纸机的运行状态.同时与触摸屏进行通信,将纸机运行数据以动态图的形式显示,并接受触摸屏给定的工艺参数来控制执行元件,实现了操作人员与纸机的人机对话功能.通过模拟调试,该系统操作简单,智能化程度高,提高了产品质量及生产效率,并在一定程度上降低了能耗.

  15. [Therapeutic touch and anorexia nervosa].

    Science.gov (United States)

    Satori, Nadine

    2016-01-01

    An innovative practice, therapeutic touch has been used for around ten years in the treatment of eating disorders. Delivered by nurse clinicians having received specific training, this approach is based on nursing diagnoses which identify the major symptoms of this pathology. The support is built around the body and its perceptions. Through the helping relationship, it mobilises the patient's resources to favour a relationship of trust, a letting-go, physical, psychological and emotional relaxation, and improves the therapeutic alliance. Copyright © 2016. Published by Elsevier Masson SAS.

  16. Highly stretchable, transparent ionic touch panel

    Science.gov (United States)

    Kim, Chong-Chan; Lee, Hyun-Hee; Oh, Kyu Hwan; Sun, Jeong-Yun

    2016-08-01

    Because human-computer interactions are increasingly important, touch panels may require stretchability and biocompatibility in order to allow integration with the human body. However, most touch panels have been developed based on stiff and brittle electrodes. We demonstrate an ionic touch panel based on a polyacrylamide hydrogel containing lithium chloride salts. The panel is soft and stretchable, so it can sustain a large deformation. The panel can freely transmit light information because the hydrogel is transparent, with 98% transmittance for visible light. A surface-capacitive touch system was adopted to sense a touched position. The panel can be operated under more than 1000% areal strain without sacrificing its functionalities. Epidermal touch panel use on skin was demonstrated by writing words, playing a piano, and playing games.

  17. Inventions on GUI for Touch Sensitive Screens

    OpenAIRE

    Mishra, Umakant

    2014-01-01

    A touch sensitive screen displays the information on the screen and also receives the input by sensing a user's touch on the same screen. This mechanism facilitates system interaction directly through the screen without needing a mouse or keyboard. This method has the advantage to make the system compact by removing keyboard, mouse and similar interactive device. However there are certain difficulties to implement a touch screen interface. The display screens of portable devices are becoming ...

  18. NUMERICAL SIMULATION OF TWO-POINT CONTACT BETWEEN WHEEL AND RAIL

    Institute of Scientific and Technical Information of China (English)

    Jun Zhang; Shouguang Sun; Xuesong Jin

    2009-01-01

    The elastic-plastic contact problem with rolling friction of wheel-rail is solved using the FE parametric quadratic programming method. Thus, the complex elastic-plastic contact problem can be calculated with high accuracy and efficiency, while the Hertz's hypothesis and the elastic semi-space assumption are avoided. Based on the 'one-point' contact calculation of wheel-rail, the computational model of 'two-point' contact are established and calculated when the wheel flange is close to the rail. In the case of 'two-point' contact, the changing laws of wheelrail contact are introduced and contact forces in various load cases are carefully analyzed. The main reason of wheel flange wear and rail side wear is found. Lubrication computational model of the wheel flange is constructed. Comparing with the result without lubrication, the contact force between wheel flange and rail decreases, which is beneficial for reducing the wear of wheel-rail.

  19. A NEW TWO-POINT ADAPTIVENONLINEAR APPROXIMATION METHOD FOR RELIABILITY ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    LiuShutian

    2004-01-01

    A two-point adaptive nonlinear approximation (referred to as TANA4) suitable for reliability analysis is proposed. Transformed and normalized random variables in probabilistic analysis could become negative and pose a challenge to the earlier developed two-point approximations; thus a suitable method that can address this issue is needed. In the method proposed, the nonlinearity indices of intervening variables are limited to integers. Then, on the basis of the present method, an improved sequential approximation of the limit state surface for reliability analysis is presented. With the gradient projection method, the data points for the limit state surface approximation are selected on the original limit state surface, which effectively represents the nature of the original response function. On the basis of this new approximation, the reliability is estimated using a first-order second-moment method. Various examples, including both structural and non-structural ones, are presented to show the effectiveness of the method proposed.

  20. Equal-time two-point correlation functions in Coulomb gauge Yang-Mills theory

    CERN Document Server

    Campagnari, D; Reinhardt, H; Astorga, F; Schleifenbaum, W

    2009-01-01

    We apply a new functional perturbative approach to the calculation of the equal-time two-point correlation functions and the potential between static color charges to one-loop order in Coulomb gauge Yang-Mills theory. The functional approach proceeds through a solution of the Schroedinger equation for the vacuum wave functional to order g^2 and derives the equal-time correlation functions from a functional integral representation via new diagrammatic rules. We show that the results coincide with those obtained from the usual Lagrangian functional integral approach, extract the beta function and determine the anomalous dimensions of the equal-time gluon and ghost two-point functions and the static potential under the assumption of multiplicative renormalizability to all orders.

  1. Two-point functions of conformal primary operators in $\\mathcal{N}=1$ superconformal theories

    CERN Document Server

    Li, Daliang

    2014-01-01

    In $\\mathcal{N}=1$ superconformal theories in four dimensions the two-point function of superconformal multiplets is known up to an overall constant. A superconformal multiplet contains several conformal primary operators, whose two-point function coefficients can be determined in terms of the multiplet's quantum numbers. In this paper we work out these coefficients in full generality, i.e. for superconformal multiplets that belong to any irreducible representation of the Lorentz group with arbitrary scaling dimension and R-charge. From our results we recover the known unitarity bounds, and also find all shortening conditions, even for non-unitary theories. For the purposes of our computations we have developed a Mathematica package for the efficient handling of expansions in Grassmann variables.

  2. Beyond Kaiser bias: mildly non-linear two-point statistics of densities in distant spheres

    Science.gov (United States)

    Uhlemann, C.; Codis, S.; Kim, J.; Pichon, C.; Bernardeau, F.; Pogosyan, D.; Park, C.; L'Huillier, B.

    2017-04-01

    We present simple parameter-free analytic bias functions for the two-point correlation of densities in spheres at large separation. These bias functions generalize the so-called Kaiser bias to the mildly non-linear regime for arbitrary density contrasts and grow as b(ρ) - b(1) ∝ (1 - ρ-13/21)ρ1 + n/3 with b(1) = -4/21 - n/3 for a power-law initial spectrum with index n. We carry out the derivation in the context of large-deviation statistics while relying on the spherical collapse model. We use a logarithmic transformation that provides a saddle-point approximation that is valid for the whole range of densities and show its accuracy against the 30 Gpc cube state-of-the-art Horizon Run 4 simulation. Special configurations of two concentric spheres that allow us to identify peaks are employed to obtain the conditional bias and a proxy for the BBKS extremum correlation functions. These analytic bias functions should be used jointly with extended perturbation theory to predict two-point clustering statistics as they capture the non-linear regime of structure formation at the per cent level down to scales of about 10 Mpc h-1 at redshift 0. Conversely, the joint statistics also provide us with optimal dark matter two-point correlation estimates that can be applied either universally to all spheres or to a restricted set of biased (over- or underdense) pairs. Based on a simple fiducial survey, we show that the variance of this estimator is reduced by five times relative to the traditional sample estimator for the two-point function. Extracting more information from correlations of different types of objects should prove essential in the context of upcoming surveys like Euclid, DESI and WFIRST.

  3. Comparison of Optimization and Two-point Methods in Estimation of Soil Water Retention Curve

    Science.gov (United States)

    Ghanbarian-Alavijeh, B.; Liaghat, A. M.; Huang, G.

    2009-04-01

    Soil water retention curve (SWRC) is one of the soil hydraulic properties in which its direct measurement is time consuming and expensive. Since, its measurement is unavoidable in study of environmental sciences i.e. investigation of unsaturated hydraulic conductivity and solute transport, in this study the attempt is to predict soil water retention curve from two measured points. By using Cresswell and Paydar (1996) method (two-point method) and an optimization method developed in this study on the basis of two points of SWRC, parameters of Tyler and Wheatcraft (1990) model (fractal dimension and air entry value) were estimated and then water content at different matric potentials were estimated and compared with their measured values (n=180). For each method, we used both 3 and 1500 kPa (case 1) and 33 and 1500 kPa (case 2) as two points of SWRC. The calculated RMSE values showed that in the Creswell and Paydar (1996) method, there exists no significant difference between case 1 and case 2. However, the calculated RMSE value in case 2 (2.35) was slightly less than case 1 (2.37). The results also showed that the developed optimization method in this study had significantly less RMSE values for cases 1 (1.63) and 2 (1.33) rather than Cresswell and Paydar (1996) method.

  4. Calculating two-point resistances in distance-regular resistor networks

    Energy Technology Data Exchange (ETDEWEB)

    Jafarizadeh, M A [Department of Theoretical Physics and Astrophysics, University of Tabriz, Tabriz 51664 (Iran, Islamic Republic of); Sufiani, R [Department of Theoretical Physics and Astrophysics, University of Tabriz, Tabriz 51664 (Iran, Islamic Republic of); Jafarizadeh, S [Department of Electrical and computer engineering, University of Tabriz, Tabriz 51664 (Iran, Islamic Republic of)

    2007-05-11

    An algorithm for the calculation of the resistance between two arbitrary nodes in an arbitrary distance-regular resistor network is provided, where the calculation is based on stratification introduced in Jafarizadeh and Salimi (2006 J. Phys. A: Math. Gen. 39 1-29) and the Stieltjes transform of the spectral distribution (Stieltjes function) associated with the network. It is shown that the resistances between a node {alpha} and all nodes {beta} belonging to the same stratum with respect to the {alpha} (R{sub {alpha}}{sub {beta}{sup (i)}}), {beta} belonging to the ith stratum with respect to the {alpha}) are the same. Also, the analytical formulae for two-point resistances R{sub {alpha}}{sub {beta}{sup (i)}}, i=1,2,3, are given in terms of the size of the network and corresponding intersection numbers. In particular, the two-point resistances in a strongly regular network are given in terms of its parameters (v, {kappa}, {lambda}, {mu}). Moreover, the lower and upper bounds for two-point resistances in strongly regular networks are discussed.

  5. A personal log method for investigating interpersonal touch.

    Science.gov (United States)

    Willis, F N; Rinck, C M

    1983-01-01

    Most of the research on interpersonal touch has involved public settings but much of our significant contact takes place in private settings. The body-accessibility studies included touch in both public and private settings, but rates of touch and settings were not reported. In the present study 76 subjects kept a log of touches received, their relationship to the toucher, the setting, and their rating of the pleasantness of the touch. There were no gender differences in rates of touch. Most touches occurred in private settings, particularly touches in personal body areas. A variety of sexual touches were reported.

  6. How to Touch Humans : Guidelines for Social Agents and Robots that can Touch

    NARCIS (Netherlands)

    Erp, J.B.F. van; Toet, A.

    2013-01-01

    Touch is an essential channel in interpersonal and affective communication, yet most social agents currently lack the capability to touch the user. In this paper we show the credibility of three premises that make the case that providing touch capability to social robots will increase their

  7. The ten rules of touch : Guidelines for social agents and robots that can touch

    NARCIS (Netherlands)

    Erp, J.B.F. van

    2012-01-01

    Touching is essential in interpersonal and affective communication, yet most social agents lack the capability to touch the user. In this paper we show the credibility of three premises that make the case that providing touch capability to social robots will increase their effectiveness in

  8. Towards social touch intelligence: developing a robust system for automatic touch recognition

    NARCIS (Netherlands)

    Jung, Merel M.

    2014-01-01

    Touch behavior is of great importance during social interaction. Automatic recognition of social touch is necessary to transfer the touch modality from interpersonal interaction to other areas such as Human-Robot Interaction (HRI). This paper describes a PhD research program on the automatic detecti

  9. How to Touch Humans : Guidelines for Social Agents and Robots that can Touch

    NARCIS (Netherlands)

    Erp, J.B.F. van; Toet, A.

    2013-01-01

    Touch is an essential channel in interpersonal and affective communication, yet most social agents currently lack the capability to touch the user. In this paper we show the credibility of three premises that make the case that providing touch capability to social robots will increase their effectiv

  10. Automatic recognition of touch gestures in the corpus of social touch

    NARCIS (Netherlands)

    Jung, Merel Madeleine; Poel, Mannes; Poppe, Ronald Walter; Heylen, Dirk K.J.

    2017-01-01

    For an artifact such as a robot or a virtual agent to respond appropriately to human social touch behavior, it should be able to automatically detect and recognize touch. This paper describes the data collection of CoST: Corpus of Social Touch, a data set containing 7805 captures of 14 different soc

  11. Towards social touch intelligence: developing a robust system for automatic touch recognition

    NARCIS (Netherlands)

    Jung, Merel Madeleine

    2014-01-01

    Touch behavior is of great importance during social interaction. Automatic recognition of social touch is necessary to transfer the touch modality from interpersonal interaction to other areas such as Human-Robot Interaction (HRI). This paper describes a PhD research program on the automatic detecti

  12. Children's Responses to Touch--A Questionnaire Study.

    Science.gov (United States)

    Neill, Sean R. St J.

    1991-01-01

    Presents results of a study of adolescents' responses to being touched. Breaks downs findings by status and sex of toucher, age and sex of subject, and type of touch and part of body being touched. Concludes that effective use of touch depends on conforming to expectations in terms of how, where, and by whom child is touched. (DK)

  13. Graphene Tribotronics for Electronic Skin and Touch Screen Applications.

    Science.gov (United States)

    Khan, Usman; Kim, Tae-Ho; Ryu, Hanjun; Seung, Wanchul; Kim, Sang-Woo

    2017-01-01

    Graphene tribotronics is introduced for touch-sensing applications such as electronic skins and touch screens. The devices are based on a coplanar coupling of triboelectrification and current transport in graphene transistors. The touch sensors are ultrasensitive, fast, and stable. Furthermore, they are transparent and flexible, and can spatially map touch stimuli such as movement of a ball, multi-touch, etc.

  14. Digital finger: beyond phenomenological figures of touch

    Directory of Open Access Journals (Sweden)

    Mika Elo

    2012-02-01

    Full Text Available Mika Elo is a postdoctoral researcher and lecturer in visual culture at Aalto University School of Arts, Design and Architecture (Aalto-ARTS, Helsinki. His research interests include theory of photographic media, philosophical media theory, and artistic research. He is participating in discussions in these areas in the capacity of curator, visual artist and researcher. He has published articles in Finnish, German, and English among others on Benjamin, Nancy, artistic research and photography theory. His doctoral thesis Valokuvan medium [The Medium of Photography] was published in Finnish in 2005 (Tutkijaliitto, Helsinki. In 2009–2011 he worked in the Figures of Touch research project (figuresoftouch.com, and since 2011 he is the director of Media Aesthetics research group at Aalto-ARTS, Department of Media.Author Biography The article reflects on digitality and interface design in terms of the multiple senses of touch. Touching is presented as a “pathic” sense of being exposed, which implies that touching exceeds the tactile and even the phenomenal world. A particular focus is set on Aristotle's and Husserl's ways of thematizing the sense of touch. In this way, two extremes of the phenomenological thinking of touching are articulated: touching as an indistinct and heterogeneous constituent of sensitivity and touching as the guarantor of immediacy of the sense experience. Referring to Derrida's critical notes concerning haptocentrism, the article attempts to problematize the hand and the finger as phenomenological figures of touch and as holds of haptic realism. The article concludes that insofar as digital interface design aims at haptic realism it conceives of the sense of touch in terms of narcissistic feedback and thus tends to conceal the pathic moment of touching.

  15. Multi-touch pinch gestures: performance and ergonomics

    OpenAIRE

    Hoggan, Eve; Nacenta, Miguel; Kristensson, Per Ola; Williamson, John; Oulasvirta, Antti; Lehtiö, Anu

    2013-01-01

    Multi-touch gestures are prevalent interaction techniques for many different types of devices and applications. One of the most common gestures is the pinch gesture, which involves the expansion or contraction of a finger spread. There are multiple uses for this gesture—zooming and scaling being the most common—but little is known about the factors affecting performance and ergonomics of the gesture motion itself. In this note, we present the results from a study where we manipulated angle, d...

  16. Research on the Control System of Gill Box Based on PLC and Touch Screen Technique%基于PLC和触摸屏技术的针梳机控制系统

    Institute of Scientific and Technical Information of China (English)

    金守峰; 张慧; 袁建畅

    2011-01-01

    B423 gill box and its attached autoleveller system are purely mechanical devices with lower intelligent, precision and efficiency. Aiming at these shortcomings, the paper put forward the control system based on PLC and touch screen. The PLC is the core of the system, which stored, computed and transmission the real-time data collected with sensor foon gill box to control the whole machine running. At the same time to communicate with the touch screen, the machine operating data is display in the form of a dynamic map, and accept the given parameters to control the implementation of the component to realize the operators and the gill of “man-machine dialogue” function. Through debugging on the B3423, the system is simple with high intelligence, improved product quality and efficiency. [Ch,5 fig. 2 tab. 12 ref. ]%B423针梳机及所配的自调匀整装置均为纯机械式装置,控制系统智能化程度不高,产品精度及效率低.针对这些缺点,文章提出了基于PLC和触摸屏的控制系统,该系统以PLC为核心,对传感器采集的针梳机实时数据进行存储、计算及传输,控制整机的运行状态.同时与触摸屏进行通讯,将整机运行数据以动态图的形式显示,并接受触摸屏给定的工艺参数来控制执行元件,实现了操作人员与针梳机的"人机对话"功能.通过在B423型针梳机上的调试,本系统操作简单,智能化程度高,提高了产品的质量及效率.

  17. Social touch in human–computer interaction

    NARCIS (Netherlands)

    Erp, J.B.F. van; Toet, A.

    2015-01-01

    Touch is our primary non-verbal communication channel for conveying intimate emotions and as such essential for our physical and emotional wellbeing. In our digital age, human social interaction is often mediated. However, even though there is increasing evidence that mediated touch affords

  18. Social touch in human–computer interaction

    NARCIS (Netherlands)

    van Erp, Johannes Bernardus Fransiscus; Toet, Alexander

    Touch is our primary non-verbal communication channel for conveying intimate emotions and as such essential for our physical and emotional wellbeing. In our digital age, human social interaction is often mediated. However, even though there is increasing evidence that mediated touch affords

  19. A Deported View Concept for Touch Interaction

    DEFF Research Database (Denmark)

    Alapetite, Alexandre; Andersen, Henning Boje; Fogh, Rune

    2013-01-01

    Following the paradigm shift where physical controls are replaced by touch-enabled surfaces, we report on an experimental evaluation of a user interface concept that allows touchscreen-based panels to be manipulated partially blindly (aircrafts, cars). The proposed multi-touch interaction strategy...

  20. Touch increases autonomic coupling between romantic partners

    Directory of Open Access Journals (Sweden)

    Jonas eChatel-Goldman

    2014-03-01

    Full Text Available Interpersonal touch is of paramount importance in human social bonding and close relationships, allowing a unique channel for affect communication. So far the effect of touch on human physiology has been studied at an individual level. The present study aims at extending the study of affective touch from isolated individuals to truly interacting dyads. We have designed an ecological paradigm where romantic partners interact only via touch and we manipulate their empathic states. Simultaneously, we collected their autonomic activity (skin conductance, pulse, respiration. 14 couples participated to the experiment. We found that interpersonal touch increased coupling of electrodermal activity between the interacting partners, regardless the intensity and valence of the emotion felt. In addition, physical touch induced strong and reliable changes in physiological states within individuals. These results support an instrumental role of interpersonal touch for affective support in close relationships. Furthermore, they suggest that touch alone allows the emergence of a somatovisceral resonance between interacting individuals, which in turn is likely to form the prerequisites for emotional contagion and empathy.

  1. User Authentication based on Continuous Touch Biometrics

    Directory of Open Access Journals (Sweden)

    Christina J Kroeze

    2016-12-01

    Full Text Available Mobile devices such as smartphones have until now been protected by traditional authentication methods, including passwords or pattern locks. These authentication mechanisms are difficult to remember and are often disabled, leaving the device vulnerable if stolen. This paper investigates the possibility of unobtrusive, continuous authentication for smartphones based on biometric data collected using a touchscreen. The possibility of authenticating users on a smartphone was evaluated by conducting an experiment simulating real-world touch interaction. Touch data was collected from 30 participants during normal phone use. The touch features were analysed in terms of the information provided for authentication. It was found that features such as finger pressure, location of touch interaction and shape of the finger were important discriminators for authentication. The touch data was also analysed using two classification algorithms to measure the authentication accuracy. The results show that touch data is sufficiently distinct between users to be used in authentication without disrupting normal touch interaction. It is also shown that the raw touch data was more effective in authentication than the aggregated gesture data.

  2. The Place of Touch in the Arts

    Science.gov (United States)

    Perricone, Christopher

    2007-01-01

    In this essay, I argue that although philosophers of art have legitimately examined and emphasized the role of sight and hearing in respect to art appreciation, for the most part they have neglected the role of touch. I develop the idea that while sight and hearing form the melody line of art appreciation, touch is its bass line, one that is…

  3. A Deported View Concept for Touch Interaction

    DEFF Research Database (Denmark)

    Alapetite, Alexandre; Andersen, Henning Boje; Fogh, Rune

    2013-01-01

    Following the paradigm shift where physical controls are replaced by touch-enabled surfaces, we report on an experimental evaluation of a user interface concept that allows touchscreen-based panels to be manipulated partially blindly (aircrafts, cars). The proposed multi-touch interaction strategy...

  4. Touch Attenuates Infants' Physiological Reactivity to Stress

    Science.gov (United States)

    Feldman, Ruth; Singer, Magi; Zagoory, Orna

    2010-01-01

    Animal studies demonstrate that maternal touch and contact regulate infant stress, and handling during periods of maternal deprivation attenuates the stress response. To measure the effects of touch on infant stress reactivity during simulated maternal deprivation, 53 dyads were tested in two paradigms: still-face (SF) and still-face with maternal…

  5. Social touch in human–computer interaction

    NARCIS (Netherlands)

    Erp, van Jan B.F.; Toet, Alexander

    2015-01-01

    Touch is our primary non-verbal communication channel for conveying intimate emotions and as such essential for our physical and emotional wellbeing. In our digital age, human social interaction is often mediated. However, even though there is increasing evidence that mediated touch affords affectiv

  6. Covariant and infrared-free graviton two-point function in de Sitter spacetime. II.

    Science.gov (United States)

    Pejhan, Hamed; Rahbardehghan, Surena

    2016-11-01

    The solution to the linearized Einstein equation in de Sitter (dS) spacetime and the corresponding two-point function are explicitly written down in a gauge with two parameters "a " and "b ". The quantization procedure, independent of the choice of the coordinate system, is based on a rigorous group theoretical approach. Our result takes the form of a universal spin-two (transverse-traceless) sector and a gauge-dependent spin-zero (pure-trace) sector. Scalar equations are derived for the structure functions of each part. We show that the spin-two sector can be written as the resulting action of a second-order differential operator (the spin-two projector) on a massless minimally coupled scalar field (the spin-two structure function). The operator plays the role of a symmetric rank-2 polarization tensor and has a spacetime dependence. The calculated spin-two projector grows logarithmically with distance and also no dS-invariant solution for either structure functions exist. We show that the logarithmically growing part and the dS-breaking contribution to the spin-zero part can be dropped out, respectively, for suitable choices of parameters "a " and "b ". Considering the transverse-traceless graviton two-point function, however, shows that dS breaking is universal (cannot be gauged away). More exactly, if one wants to respect the covariance and positiveness conditions, the quantization of the dS graviton field (as for any gauge field) cannot be carried out directly in a Hilbert space and involves unphysical negative norm states. However, a suitable adaptation (Krein spaces) of the Gupta-Bleuler scheme for massless fields, based on the group theoretical approach, enables us to obtain the corresponding two-point function satisfying the conditions of locality, covariance, transversality, index symmetrizer, and tracelessness.

  7. Chinese culture approached through touch

    DEFF Research Database (Denmark)

    Wang, Li; Champion, Erik

    2012-01-01

    Can recent technology help bridge cultures through playful interaction appropriate to traditional tacit means of acquiring knowledge? In order to help answer this question, we designed four Adobe Flash-based based game prototypes and evaluated them via a touch-screen PC. The goal was to offer non......Chinese participants a playful way of experiencing aspects of traditional Chinese culture. The four single-player games were based on the four arts of China (music, calligraphy, painting and the game of Go!). In the evaluation we asked non-Chinese and the Chinese participants to evaluate the games in terms of learning......, fun, and cultural authenticity. While this form of tangible computing proved engaging, it raises technical issues of how to convey appropriately the interactive elements without the help of the evaluator, and how to evaluate user satisfaction. We also briefly discuss more embodied and spatial...

  8. A Genetic Algorithm for the Segmentation of Known Touching Objects

    Directory of Open Access Journals (Sweden)

    Edgar Scavino

    2009-01-01

    Full Text Available Problem statement: Segmentation is the first and fundamental step in the process of computer vision and object classification. However, complicate or similar colour pattern add complexity to the segmentation of touching objects. The objective of this study was to develop a robust technique for the automatic segmentation and classification of touching plastic bottles, whose features were previously stored in a database. Approach: Our technique was based on the possibility to separate the two objects by means of a segment of straight line, whose position was determined by a genetic approach. The initial population of the genetic algorithm was heuristically determined among a large set of cutting lines, while further generations were selected based on the likelihood of the two objects with the images stored in the database. Results: Extensive testing, which was performed on random couples out of a population of 50 bottles, showed that the correct segmentation could be achieved in success rates above 90% with only a limited number of both chromosomes and iterations, thus reducing the computing time. Conclusion: These findings proved the effectiveness of our method as far as touching plastic bottles are concerned. This technique, being absolutely general, can be extended to any situation in which the properties of single objects were previously stored in a database.

  9. Covalent docking using autodock: Two-point attractor and flexible side chain methods.

    Science.gov (United States)

    Bianco, Giulia; Forli, Stefano; Goodsell, David S; Olson, Arthur J

    2016-01-01

    We describe two methods of automated covalent docking using Autodock4: the two-point attractor method and the flexible side chain method. Both methods were applied to a training set of 20 diverse protein-ligand covalent complexes, evaluating their reliability in predicting the crystallographic pose of the ligands. The flexible side chain method performed best, recovering the pose in 75% of cases, with failures for the largest inhibitors tested. Both methods are freely available at the AutoDock website (http://autodock.scripps.edu). © 2015 The Protein Society.

  10. A Note on Reflection Positivity and the Kallen-Lehmann Representation of Two Point Correlation Functions

    CERN Document Server

    Usui, Kouta

    2012-01-01

    It will be proved that a model of lattice field theories which satisfies (A1) Hermiticity, (A2) translational invariance, (A3) reflection positivity, and (A4) polynomial boundedness of correlations, permits the Kallen-Lehmann representation of two point correlation functions with positive spectral density function. Then, we will also argue that positivity of spectral density functions is necessary for a lattice theory to satisfy conditions (A1) - (A4). As an example, a lattice overlap scalar boson model will be discussed. We will find that the overlap scalar boson violates the reflection positivity.

  11. Two-point Functions at Two Loops in Three Flavour Chiral Perturbation Theory

    CERN Document Server

    Amorós, G; Talavera, P; Amoros, Gabriel; Bijnens, Johan; Talavera, Pere

    2000-01-01

    The vector and axial-vector two-point functions are calculated to next-to-next-to-leading order in Chiral Perturbation Theory for three light flavours. We also obtain expressions at the same order for the masses, $m_\\pi^2$, $m_K^2$ and $m_\\eta^2$, and the decay constants, $F_\\pi$, $F_K$ and $F_\\eta$. We present some numerical results after a simple resonance estimate of some of the new ${\\cal O}(p^6)$ constants.

  12. Exact relation with two-point correlation functions and phenomenological approach for compressible magnetohydrodynamic turbulence.

    Science.gov (United States)

    Banerjee, Supratik; Galtier, Sébastien

    2013-01-01

    Compressible isothermal magnetohydrodynamic turbulence is analyzed under the assumption of statistical homogeneity and in the asymptotic limit of large kinetic and magnetic Reynolds numbers. Following Kolmogorov we derive an exact relation for some two-point correlation functions which generalizes the expression recently found for hydrodynamics. We show that the magnetic field brings new source and flux terms into the dynamics which may act on the inertial range similarly as a source or a sink for the mean energy transfer rate. The introduction of a uniform magnetic field simplifies significantly the exact relation for which a simple phenomenology may be given. A prediction for axisymmetric energy spectra is eventually proposed.

  13. Two-point correlators revisited: Fast and slow scales in multifield models of Inflation

    CERN Document Server

    Ghersi, José T Gálvez

    2016-01-01

    We study the structure of two-point correlators of the inflationary field fluctuations in order to improve the accuracy and efficiency of the existing spectral methods. We present a description motivated by the separation of the fast and slow evolving components of the spectrum. Our purpose is to rephrase all the relevant equations of motion in terms of slowly varying quantities. This is important in order to consider the contribution from high-frequency modes to the spectrum without affecting computational performance. The slow-roll approximation is not required to reproduce the main distinctive features in the power spectrum for each specific model of inflation.

  14. Beyond Kaiser bias: mildly non-linear two-point statistics of densities in distant spheres

    CERN Document Server

    Uhlemann, C; Kim, J; Pichon, C; Bernardeau, F; Pogosyan, D; Park, C; L'Huillier, B

    2016-01-01

    Simple parameter-free analytic bias functions for the two-point correlation of densities in spheres at large separation are presented. These bias functions generalize the so-called Kaiser bias to the mildly non-linear regime for arbitrary density contrasts. The derivation is carried out in the context of large deviation statistics while relying on the spherical collapse model. A logarithmic transformation provides a saddle approximation which is valid for the whole range of densities and shown to be accurate against the 30 Gpc cube state-of-the-art Horizon Run 4 simulation. Special configurations of two concentric spheres that allow to identify peaks are employed to obtain the conditional bias and a proxy to BBKS extrema correlation functions. These analytic bias functions should be used jointly with extended perturbation theory to predict two-point clustering statistics as they capture the non-linear regime of structure formation at the percent level down to scales of about 10 Mpc/h at redshift 0. Conversely...

  15. Statistics of the two-point cross-covariance function of solar oscillations

    Science.gov (United States)

    Nagashima, Kaori; Sekii, Takashi; Gizon, Laurent; Birch, Aaron C.

    2016-09-01

    Context. The cross-covariance of solar oscillations observed at pairs of points on the solar surface is a fundamental ingredient in time-distance helioseismology. Wave travel times are extracted from the cross-covariance function and are used to infer the physical conditions in the solar interior. Aims: Understanding the statistics of the two-point cross-covariance function is a necessary step towards optimizing the measurement of travel times. Methods: By modeling stochastic solar oscillations, we evaluate the variance of the cross-covariance function as function of time-lag and distance between the two points. Results: We show that the variance of the cross-covariance is independent of both time-lag and distance in the far field, that is, when they are large compared to the coherence scales of the solar oscillations. Conclusions: The constant noise level for the cross-covariance means that the signal-to-noise ratio for the cross-covariance is proportional to the amplitude of the expectation value of the cross-covariance. This observation is important for planning data analysis efforts.

  16. Statistics of the two-point cross-covariance function of solar oscillations

    CERN Document Server

    Nagashima, Kaori; Gizon, Laurent; Birch, Aaron C

    2016-01-01

    Context: The cross-covariance of solar oscillations observed at pairs of points on the solar surface is a fundamental ingredient in time-distance helioseismology. Wave travel times are extracted from the cross-covariance function and are used to infer the physical conditions in the solar interior. Aims: Understanding the statistics of the two-point cross-covariance function is a necessary step towards optimizing the measurement of travel times. Methods: By modeling stochastic solar oscillations, we evaluate the variance of the cross-covariance function as function of time-lag and distance between the two points. Results: We show that the variance of the cross-covariance is independent of both time-lag and distance in the far field, i.e., when they are large compared to the coherence scales of the solar oscillations. Conclusions: The constant noise level for the cross-covariance means that the signal-to-noise ratio for the cross-covariance is proportional to the amplitude of the expectation value of the cross-...

  17. Assessment of light touch sensation in the hands of systemic sclerosis patients

    Directory of Open Access Journals (Sweden)

    Paula Gabriel Silva

    2014-09-01

    Full Text Available INTRODUCTION: Systemic sclerosis is a relatively rare connective tissue disorder characterized by severe and progressive fibrosis of the skin. Due to the current lack of available information on this subject, the aim of the present study was to assess light touch sensations in the hands of patients with systemic sclerosis. METHODS: We completed a cross-sectional comparative study. Light touch sensations were evaluated in 30 individuals, including 15 patients with systemic sclerosis who exhibited changes in the dermis of their hands without loss of the distal phalanx and 15 subjects who did not exhibit changes in the upper limbs (control group. The groups were age- and sex-matched. Tactile sensory evaluations were performed using the Semmes-Weinstein monofilament test and the two-point discrimination test. RESULTS: Statistically significant differences were found between groups in the monofilament test. The study group had lower scores across all points of the hand when compared with the control group. Differences were also found when dominant and non-dominant hands were compared (p<0.05. Statistically significant differences were found between groups for a subset of the assessed points in the two-point discrimination test. CONCLUSIONS: The results of a monofilament test showed that tactile sensation, specifically light touch and deep pressure sensations, is altered in the hands of systemic sclerosis patients.

  18. The touch that heals: the uses and meanings of touch in the clinical encounter.

    Science.gov (United States)

    Leder, Drew; Krucoff, Mitchell W

    2008-04-01

    This paper investigates the healer's touch in contemporary medical practice, with attention to both allopathic and alternative modalities. Healing is understood as the recovery of an integrated relationship between the self and its body, others, and the surrounding world-the relationship that illness has rendered problematic. In this context, touch can play a crucial role in the clinical encounter. Unlike other modes of sensory apprehension, which tend to involve distance and/or objectification, touch unfolds through an impactful, expressive, reciprocity between the toucher and the touched. For the ill person this can serve to reestablish human connection and facilitate healing changes at the prelinguistic level. The healer's touch involves a blending of attention, compassion, and skill. The clinical efficacy of touch is also dependent upon the patient's active receptivity, aspects of which are explored. All too often, modern medical practice is characterized predominately by the "objectifying touch" of the physical examination, or the "absent touch" wherein technological mediation replaces embodied contact. This paper explores the unique properties of touch as a medium of perception, action, and expression that can render touch a healing force within the clinical encounter.

  19. Homo Tangens, or Man Touching and Tangible

    Directory of Open Access Journals (Sweden)

    J Mizinska

    2011-09-01

    Full Text Available The article is devoted to the analysis of the concept sense of touch, which is considered in all its aspects and dimensions. The author's aim is to determine what is touch in terms of philosophy, what types it has and what traditional functions (i.e. prior to the emergence of virtual reality each of these functions performed. The conducted research allows the author to make a conclusion about the importance of perceiving the role and significance of man as a homo tangens - man touching and tangible.

  20. iPod touch For Dummies

    CERN Document Server

    Bove, Tony

    2011-01-01

    The ultimate beginner guide to the iPod touch, now updated and in full-color! Part media player, portable game console, and breakthrough Internet device, you could say that the iPod touch is one ideal gadget. With this new, full-color edition, bestselling For Dummies author Tony Bove walks you through powering up your iPod touch, personalizing it, establishing a Wi-Fi connection, and synchronizing your data. You'll also explore how to surf the web, rent movies, buy songs, send and receive e-mail, get directions, check stocks, organize photos, watch videos, keep a calendar, and much more. Plus,

  1. Logarithmic two-point correlation functions from a z=2 Lifshitz model

    Energy Technology Data Exchange (ETDEWEB)

    Zingg, T. [Institute for Theoretical Physics and Spinoza Institute, Universiteit Utrecht,Leuvenlaan 4, 3584 CE Utrecht (Netherlands)

    2014-01-21

    The Einstein-Proca action is known to have asymptotically locally Lifshitz spacetimes as classical solutions. For dynamical exponent z=2, two-point correlation functions for fluctuations around such a geometry are derived analytically. It is found that the retarded correlators are stable in the sense that all quasinormal modes are situated in the lower half-plane of complex frequencies. Correlators in the longitudinal channel exhibit features that are reminiscent of a structure usually obtained in field theories that are logarithmic, i.e. contain an indecomposable but non-diagonalizable highest weight representation. This provides further evidence for conjecturing the model at hand as a candidate for a gravity dual of a logarithmic field theory with anisotropic scaling symmetry.

  2. Implementation of the Two-Point Angular Correlation Function on a High-Performance Reconfigurable Computer

    Directory of Open Access Journals (Sweden)

    Volodymyr V. Kindratenko

    2009-01-01

    Full Text Available We present a parallel implementation of an algorithm for calculating the two-point angular correlation function as applied in the field of computational cosmology. The algorithm has been specifically developed for a reconfigurable computer. Our implementation utilizes a microprocessor and two reconfigurable processors on a dual-MAP SRC-6 system. The two reconfigurable processors are used as two application-specific co-processors. Two independent computational kernels are simultaneously executed on the reconfigurable processors while data pre-fetching from disk and initial data pre-processing are executed on the microprocessor. The overall end-to-end algorithm execution speedup achieved by this implementation is over 90× as compared to a sequential implementation of the algorithm executed on a single 2.8 GHz Intel Xeon microprocessor.

  3. Two-point gauge invariant quark Green's functions with polygonal phase factor lines

    CERN Document Server

    Sazdjian, H

    2013-01-01

    Polygonal lines are used for the paths of the gluon field phase factors entering in the definition of gauge invariant quark Green's functions. This allows classification of the Green's functions according to the number of segments the polygonal lines contain. Functional relations are established between Green's functions with polygonal lines with different numbers of segments. An integrodifferential equation is obtained for the quark two-point Green's function with a path along a single straight line segment where the kernels are represented by a series of Wilson loop averages along polygonal contours. The equation is exactly and analytically solved in the case of two-dimensional QCD in the large-$N_c$ limit. The solution displays generation of an infinite number of dynamical quark masses accompanied with branch point singularities that are stronger than simple poles. An approximation scheme, based on the counting of functional derivatives of Wilson loops, is proposed for the resolution of the equation in fou...

  4. Applying inversion to construct planar, rational spirals that satisfy two-point G(2) Hermite data

    CERN Document Server

    Kurnosenko, A

    2010-01-01

    A method of two-point G(2) Hermite interpolation with spirals is proposed. To construct a sought for curve, the inversion is applied to an arc of some other spiral. To illustrate the method, inversions of parabola are considered in detail. The resulting curve is 4th degree rational. The method allows the matching of a wide range of boundary conditions, including those which require an inflection. Although not all G(2) Hermite data can be matched with a spiral generated from a parabolic arc, introducing one intermediate G(2) data solves the problem. Expanding the method by involving other spirals arcs is also discussed. (C) 2009 Elsevier B.V. All rights reserved.

  5. Asymptotic behaviour of two-point functions in multi-species models

    Directory of Open Access Journals (Sweden)

    Karol K. Kozlowski

    2016-05-01

    Full Text Available We extract the long-distance asymptotic behaviour of two-point correlation functions in massless quantum integrable models containing multi-species excitations. For such a purpose, we extend to these models the method of a large-distance regime re-summation of the form factor expansion of correlation functions. The key feature of our analysis is a technical hypothesis on the large-volume behaviour of the form factors of local operators in such models. We check the validity of this hypothesis on the example of the SU(3-invariant XXX magnet by means of the determinant representations for the form factors of local operators in this model. Our approach confirms the structure of the critical exponents obtained previously for numerous models solvable by the nested Bethe Ansatz.

  6. Asymptotic behaviour of two-point functions in multi-species models

    Science.gov (United States)

    Kozlowski, Karol K.; Ragoucy, Eric

    2016-05-01

    We extract the long-distance asymptotic behaviour of two-point correlation functions in massless quantum integrable models containing multi-species excitations. For such a purpose, we extend to these models the method of a large-distance regime re-summation of the form factor expansion of correlation functions. The key feature of our analysis is a technical hypothesis on the large-volume behaviour of the form factors of local operators in such models. We check the validity of this hypothesis on the example of the SU (3)-invariant XXX magnet by means of the determinant representations for the form factors of local operators in this model. Our approach confirms the structure of the critical exponents obtained previously for numerous models solvable by the nested Bethe Ansatz.

  7. Expansion schemes for gravitational clustering: computing two-point and three-point functions

    CERN Document Server

    Valageas, P

    2007-01-01

    We describe various expansion schemes that can be used to study gravitational clustering. Obtained from the equations of motion or their path-integral formulation, they provide several perturbative expansions that are organized in different fashion or involve different partial resummations. We focus on the two-point and three-point correlation functions, but these methods also apply to all higher-order correlation and response functions. We present the general formalism, which holds for the gravitational dynamics as well as for similar models, such as the Zeldovich dynamics, that obey similar hydrodynamical equations of motion with a quadratic nonlinearity. We give our explicit analytical results up to one-loop order for the simpler Zeldovich dynamics. For the gravitational dynamics, we compare our one-loop numerical results with numerical simulations. We check that the standard perturbation theory is recovered from the path integral by expanding over Feynman's diagrams. However, the latter expansion is organ...

  8. Quantization of fluctuations in DSR: the two-point function and beyond

    CERN Document Server

    Gubitosi, Giulia; Magueijo, Joao

    2015-01-01

    We show that the two-point function of a quantum field theory with de Sitter momentum space (herein called DSR) can be expressed as the product of a standard delta function and an energy-dependent factor. This is a highly non-trivial technical result in any theory without a preferred frame. Applied to models exhibiting running of the dimensionality of space, this result is essential in proving that vacuum fluctuations are generally scale-invariant at high energies whenever there is running to two dimensions. This is equally true for theories with and without a preferred frame, with differences arising only as we consider higher order correlators. Specifically, the three-point function of DSR has a unique structure of "open triangles", as shown here.

  9. Two-point resistance of a resistor network embedded on a globe.

    Science.gov (United States)

    Tan, Zhi-Zhong; Essam, J W; Wu, F Y

    2014-07-01

    We consider the problem of two-point resistance in an (m-1) × n resistor network embedded on a globe, a geometry topologically equivalent to an m × n cobweb with its boundary collapsed into one single point. We deduce a concise formula for the resistance between any two nodes on the globe using a method of direct summation pioneered by one of us [Z.-Z. Tan, L. Zhou, and J. H. Yang, J. Phys. A: Math. Theor. 46, 195202 (2013)]. This method is contrasted with the Laplacian matrix approach formulated also by one of us [F. Y. Wu, J. Phys. A: Math. Gen. 37, 6653 (2004)], which is difficult to apply to the geometry of a globe. Our analysis gives the result in the form of a single summation.

  10. Measuring baryon acoustic oscillations with angular two-point correlation function

    CERN Document Server

    Alcaniz, Jailson S; Bernui, Armando; Carvalho, Joel C; Benetti, Micol

    2016-01-01

    The Baryon Acoustic Oscillations (BAO) imprinted a characteristic correlation length in the large-scale structure of the universe that can be used as a standard ruler for mapping out the cosmic expansion history. Here, we discuss the application of the angular two-point correlation function, $w(\\theta)$, to a sample of luminous red galaxies of the Sloan Digital Sky Survey (SDSS) and derive two new measurements of the BAO angular scale at $z = 0.235$ and $z = 0.365$. Since noise and systematics may hinder the identification of the BAO signature in the $w - \\theta$ plane, we also introduce a potential new method to localize the acoustic bump in a model-independent way. We use these new measurements along with previous data to constrain cosmological parameters of dark energy models and to derive a new estimate of the acoustic scale $r_s$.

  11. Two-point paraxial traveltime formula for inhomogeneous isotropic and anisotropic media: Tests of accuracy

    KAUST Repository

    Waheed, Umair bin

    2013-09-01

    On several simple models of isotropic and anisotropic media, we have studied the accuracy of the two-point paraxial traveltime formula designed for the approximate calculation of the traveltime between points S\\' and R\\' located in the vicinity of points S and R on a reference ray. The reference ray may be situated in a 3D inhomogeneous isotropic or anisotropic medium with or without smooth curved interfaces. The twopoint paraxial traveltime formula has the form of the Taylor expansion of the two-point traveltime with respect to spatial Cartesian coordinates up to quadratic terms at points S and R on the reference ray. The constant term and the coefficients of the linear and quadratic terms are determined from quantities obtained from ray tracing and linear dynamic ray tracing along the reference ray. The use of linear dynamic ray tracing allows the evaluation of the quadratic terms in arbitrarily inhomogeneous media and, as shown by examples, it extends the region of accurate results around the reference ray between S and R (and even outside this interval) obtained with the linear terms only. Although the formula may be used for very general 3D models, we concentrated on simple 2D models of smoothly inhomogeneous isotropic and anisotropic (~8% and ~20% anisotropy) media only. On tests, in which we estimated twopoint traveltimes between a shifted source and a system of shifted receivers, we found that the formula may yield more accurate results than the numerical solution of an eikonal-based differential equation. The tests also indicated that the accuracy of the formula depends primarily on the length and the curvature of the reference ray and only weakly depends on anisotropy. The greater is the curvature of the reference ray, the narrower its vicinity, in which the formula yields accurate results.

  12. [The language of touch in care].

    Science.gov (United States)

    Malaquin-Pavan, Evelyne

    2013-03-01

    At the heart of the care relationship, the hands of the caregiver the body of the patient interact. The language of touch is therefore expressed in addition to the verbal and nonverbal elements of human communication.

  13. Touch- and Brush-Spinning of Nanofibers.

    Science.gov (United States)

    Tokarev, Alexander; Asheghali, Darya; Griffiths, Ian M; Trotsenko, Oleksandr; Gruzd, Alexey; Lin, Xin; Stone, Howard A; Minko, Sergiy

    2015-11-01

    Robust, simple, and scalable touch- and brush-spinning methods for the drawing of nanofibers, core-shell nanofibers, and their aligned 2D and 3D meshes using polymer solutions and melts are discussed.

  14. The gentle touch receptors of mammalian skin

    OpenAIRE

    Zimmerman, Amanda; Bai, Ling; Ginty, David D.

    2014-01-01

    The skin is our largest sensory organ, transmitting pain, temperature, itch, and touch information to the central nervous system. Touch sensations are conveyed by distinct combinations of mechanosensory end organs and the low-threshold mechanoreceptors (LTMRs) that innervate them. Here we explore the various structures underlying the diverse functions of cutaneous LTMR end organs. Beyond anchoring of LTMRs to the surrounding dermis and epidermis, recent evidence suggests that the non-neuronal...

  15. The role of touch in acupuncture treatment.

    Science.gov (United States)

    Chae, Younbyoung; Olausson, Håkan

    2017-02-01

    Acupuncture is a therapeutic treatment that is characterised by the insertion of a needle at a particular location on the body. Acupuncture stimulation includes sensory-discriminative and affective-social touch dimensions. In this review, we discuss the role of touch during acupuncture stimulation with an emphasis on the therapeutic, sensory-discriminative and affective-social aspects. In the discriminative dimension, de qi, which is associated with needling, includes a combination of various sensations, such as heaviness, numbness, soreness and distension. Achieving the appropriate de qi sensation appears to be fundamental to the therapeutic outcome following acupuncture treatment. In the affective dimension, the acupuncture procedure typically includes gentle manual touch stimulation, which induces feelings of calm and well-being, perhaps by activating C tactile fibres. Enhanced activity of C tactile afferents may induce a 'limbic touch' response, resulting in emotional and hormonal reactions. Because acupuncture is a 'therapist intensive' and complex intervention, it is necessary to understand the role of social touch between the practitioner and patient. Both sensory-discriminative and affective-social touch aspects play an important role in the therapeutic effect of acupuncture treatment in clinical practice.

  16. An Attempt to Derive the epsilon Equation from a Two-Point Closure

    Science.gov (United States)

    Canuto, V. M.; Cheng, Y.; Howard, A. M.

    2010-01-01

    The goal of this paper is to derive the equation for the turbulence dissipation rate epsilon for a shear-driven flow. In 1961, Davydov used a one-point closure model to derive the epsilon equation from first principles but the final result contained undetermined terms and thus lacked predictive power. Both in 1987 and in 2001, attempts were made to derive the epsilon equation from first principles using a two-point closure, but their methods relied on a phenomenological assumption. The standard practice has thus been to employ a heuristic form of the equation that contains three empirical ingredients: two constants, c(sub 1 epsilon), and c(sub 2 epsilon), and a diffusion term D(sub epsilon) In this work, a two-point closure is employed, yielding the following results: 1) the empirical constants get replaced by c(sub 1), c(sub 2), which are now functions of Kappa and epsilon; 2) c(sub 1) and c(sub 2) are not independent because a general relation between the two that are valid for any Kappa and epsilon are derived; 3) c(sub 1), c(sub 2) become constant with values close to the empirical values c(sub 1 epsilon), c(sub epsilon 2), (i.e., homogenous flows); and 4) the empirical form of the diffusion term D(sub epsilon) is no longer needed because it gets substituted by the Kappa-epsilon dependence of c(sub 1), c(sub 2), which plays the role of the diffusion, together with the diffusion of the turbulent kinetic energy D(sub Kappa), which now enters the new equation (i.e., inhomogeneous flows). Thus, the three empirical ingredients c(sub 1 epsilon), c(sub epsilon 2), D (sub epsilon)are replaced by a single function c(sub 1)(Kappa, epsilon ) or c(sub 2)(Kappa, epsilon ), plus a D(sub Kappa)term. Three tests of the new equation for epsilon are presented: one concerning channel flow and two concerning the shear-driven planetary boundary layer (PBL).

  17. "Touch Me, Like Me": Testing an Encounter Group Assumption

    Science.gov (United States)

    Boderman, Alvin; And Others

    1972-01-01

    An experiment to test an encounter group assumption that touching increases interpersonal attraction was conducted. College women were randomly assigned to a touch or no-touch condition. A comparison of total evaluation scores verified the hypothesis: subjects who touched the accomplice perceived her as a more attractive person than those who did…

  18. Virtual touch tissue quantification technique in the evaluation of tissue elasticity in breast fibroadenoma%声触诊组织定量技术评估乳腺纤维腺瘤弹性

    Institute of Scientific and Technical Information of China (English)

    李红苗; 隋秀芳; 刘卫勇; 赵志红; 叶显俊; 叶磊

    2013-01-01

    目的:探讨声触诊组织定量(VTQ)技术评估乳腺纤维腺瘤的弹性。方法应用 VTQ 技术对24例女性患者共34个病灶进行测量,同时测量病灶周围的乳腺腺体组织及脂肪组织,获取病灶内部、乳腺腺体组织及脂肪组织的剪切波速度(SWV)。结果纤维腺瘤、乳腺腺体组织及脂肪组织 SWV 测值缺失值出现率分别为20.59%、6.87%及2.94%,纤维腺瘤 SWV 测值缺失值出现率高于乳腺腺体组织及脂肪组织(P <0.01);乳腺腺体组织和脂肪组织 SWV 测值缺失值出现率比较差异无统计学意义(P >0.05)。纤维腺瘤、乳腺腺体组织及脂肪组织 SWV 测值分别为(2.82±0.60)m/s、(1.69±0.41)m/s 及(1.27±0.36)m/s, SWV 值纤维腺瘤>乳腺腺体组织>脂肪组织(均 P <0.05)。结论VTQ 可快速无创测量纤维腺瘤的剪切波速度,从而客观反映纤维腺瘤的弹性模量。%Objective To explore the value of virtual touch tissue quantification (VTQ)in the assessment of breast fibroadenoma.Methods A total of 24 cases with 34 breast lesions were examined by ultrasonography.VTQ measurements were performed in mammary gland tissues and adipose tissues around the leisions.Results The occur-rence rate of missing data of fibroadenoma,mammary gland tissues and adipose tissues was 20.59%,6.87%,and 2.94%,respectively,with significantly difference between fibroadenoma and mammary gland tissues (P 0.05).The SWV of fibroadenoma, mammary gland tissues,and adipose tissues were (2.82 ±0.60)m/s,(1.69 ±0.41)m/s,and (1.27 ±0.36)m/s. Significant differences regarding SWV were observed among fibroadenoma,mammary gland tissues,and adipose tissues (all P <0.05).Conclusion VTQ is a reliable and rapid elastographic methods,which is helpful for noninvasive e-valuation of fibroadenoma.

  19. Covariant and infrared-free graviton two-point function in de Sitter spacetime II

    CERN Document Server

    Pejhan, Hamed

    2016-01-01

    The solution to the linearized Einstein equation in de Sitter (dS) spacetime and the corresponding two-point function are explicitly written down in a gauge with two parameters `$a$' and `$b$'. The quantization procedure, independent of the choice of the coordinate system, is based on a rigorous group theoretical approach. Our result takes the form of a universal spin-two (transverse-traceless) sector and a gauge-dependent spin-zero (pure-trace) sector. Scalar equations are derived for the structure functions of each part. We show that the spin-two sector can be written as the resulting action of a second-order differential operator (the spin-two projector) on a massless minimally coupled scalar field (the spin-two structure function). The operator plays the role of a symmetric rank-$2$ polarization tensor and has a spacetime dependence. The calculated spin-two projector grows logarithmically with distance and also no dS-invariant solution for either structure functions exist. We show that the logarithmically...

  20. The Two-Point Correlation Function of Gamma-ray Bursts

    CERN Document Server

    Li, Ming-Hua

    2015-01-01

    In this paper, we examine the spacial distribution of gamma-ray bursts (GRBs) using a sample of 373 objects. We subdivide the GRB data into two redshift intervals over the redshift range $0two-point correlation function (2PCF), $\\xi(r)$ of the GRBs. In determining the separation distance of the GRB pairs, we consider two representative cosmological models: a cold dark matter universe plus a cosmological constant $\\Lambda$, with $(\\Omega_{{\\rm m}}, \\Omega_{{\\rm \\Lambda}})=(0.28,0.72)$ and an Einstein-de Sitter (EdS) universe, with $(\\Omega_{{\\rm m}}, \\Omega_{{\\rm \\Lambda}})=(1,0)$. We find a $z$-decreasing correlation of the GRB distribution, which is in agreement with the predictions of the current structure formation theory. We fit a power-law model $\\xi(r)=(r/r_0)^{-\\gamma}$ to the measured $\\xi(r)$ and obtain an amplitude and slope of $r_0= 1235.2 \\pm 342.6~h^{-1}$ Mpc and $\\gamma = 0.80\\pm 0.19 $ ($1\\sigma$ confidence level) over the scales $r=200$ to $10^4~h^{-1}$ Mpc. Our ...

  1. Exteroceptive aspects of nociception: insights from graphesthesia and two-point discrimination.

    Science.gov (United States)

    Mørch, Carsten Dahl; Andersen, Ole K; Quevedo, Alexandre S; Arendt-Nielsen, Lars; Coghill, Robert C

    2010-10-01

    The exteroceptive capabilities of the nociceptive system have long been thought to be considerably more limited than those of the tactile system. However, most investigations of spatio-temporal aspects of the nociceptive system have largely focused on intensity coding as consequence of spatial or temporal summation. Graphesthesia, the identification of numbers "written" on the skin, and assessment of the two-point discrimination thresholds were used to compare the exteroceptive capabilities of the tactile and nociceptive systems. Numbers were "written" on the forearm and the abdomen by tactile stimulation and by painful non-contact infrared laser heat stimulation. Subjects performed both graphesthesia tasks better than chance. The tactile graphesthesia tasks were performed with 89% (82-97%) correct responses on the forearm and 86% (79-94%) correct responses on the abdomen. Tactile graphesthesia tasks were significantly better than painful heat graphesthesia tasks that were performed with 31% (23-40%) and 44% (37-51%) correct responses on the forearm and abdomen, respectively. These findings demonstrate that the central nervous system is capable of assembling complex spatio-temporal patterns of nociceptive information from the body surface into unified mental objects with sufficient accuracy to enable behavioral discrimination.

  2. The real space clustering of galaxies in SDSS DR7: I. Two point correlation functions

    CERN Document Server

    Shi, Feng; Wang, Huiyuan; Zhang, Youcai; Mo, H J; Bosch, Frank C van den; Li, Shijie; Liu, Chengze; Lu, Yi; Tweed, Dylan; Yang, Lei

    2016-01-01

    Using a method to correct redshift space distortion (RSD) for individual galaxies, we present the measurements of real space two-point correlation functions (2PCFs) of galaxies in the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7). Galaxy groups selected from the SDSS are used as proxies of dark matter halos to correct the virial motions of galaxies in dark matter halos, and to reconstruct the large-scale velocity field. We use an ensemble of mock catalogs to demonstrate the reliability of our method. Over the range $0.2 < r < 20 h^{-1}{\\rm {Mpc}}$, the 2PCF measured directly in reconstructed real space is better than the measurement error due to cosmic variance, if the reconstruction uses the correct cosmology. Applying the method to the SDSS DR7, we construct a real space version of the main galaxy catalog, which contains 396,068 galaxies in the North Galactic Cap with redshifts in the range $0.01 \\leq z \\leq 0.12$. The Sloan Great Wall, the largest known structure in the nearby Universe, is not...

  3. ROSETTA lander Philae: Touch-down reconstruction

    Science.gov (United States)

    Roll, Reinhard; Witte, Lars

    2016-06-01

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

  4. FI3D : Direct-Touch Interaction for the Exploration of 3D Scientific Visualization Spaces

    NARCIS (Netherlands)

    Yu, Lingyun; Svetachov, Pjotr; Isenberg, Petra; Everts, Maarten H.; Isenberg, Tobias

    2010-01-01

    We present the design and evaluation of FI3D, a direct-touch data exploration technique for 3D visualization spaces. The exploration of three-dimensional data is core to many tasks and domains involving scientific visualizations. Thus, effective data navigation techniques are essential to enable com

  5. Effect of Therapeutic Touch in Patients with Cancer: a Literature Review

    Science.gov (United States)

    Tabatabaee, Amir; Tafreshi, Mansoureh Zagheri; Rassouli, Maryam; Aledavood, Seyed Amir; AlaviMajd, Hamid; Farahmand, Seyed Kazem

    2016-01-01

    Background: The use of complementary and alternative medicine (CAM) techniques has been growing. The National Center for Complementary and Alternative Medicine places therapeutic touch (TT) into the category of bio field energy. This literature review is aimed at critically evaluating the data from clinical trials examining the clinical efficacy of therapeutic touch as a supportive care modality in adult patients with cancer. Methods: Electronic databases (PubMed, Scopus, Scholar Google, and Science Direct) were searched from the year 1990 to 2015 to locate potentially relevant peer-reviewed articles using the key words therapeutic touch, touch therapy, neoplasm, cancer, and CAM. Additionally, relevant journals and references of all the located articles were manually searched for other potentially relevant studies. Results: The number of 334 articles was found on the basis of the key words, of which 17 articles related to the clinical trial were examined in accordance with the objectives of the study. A total of 6 articles were in the final dataset in which several examples of the positive effects of healing touch on pain, nausea, anxiety and fatigue, and life quality and also on biochemical parameters were observed. Conclusion: Based on the results of this study, an affirmation can be made regarding the use of TT, as a non-invasive intervention for improving the health status in patients with cancer. Moreover, therapeutic touch was proved to be a useful strategy for adult patients with cancer. PMID:27194823

  6. Touching the Void - Introducing CoST: Corpus of Social Touch

    NARCIS (Netherlands)

    Jung, Merel M.; Poppe, Ronald; Poel, Mannes; Heylen, Dirk K. J.

    2014-01-01

    Touch behavior is of great importance during social interaction. To transfer the tactile modality from interpersonal interaction to other areas such as Human-Robot Interaction (HRI) and remote communication automatic recognition of social touch is necessary. This paper introduces CoST: Corpus of Soc

  7. Social touch technology : extending the reach of social touch through haptic technology

    NARCIS (Netherlands)

    Huisman, Gijs

    2017-01-01

    The skin not only protects the body from harm but, through receptors found in the skin, also enables the sense of touch. The sense of touch is used to obtain information about the world outside the body, for example, the shape and weight of a book or the texture of its cover. However, the sense of

  8. [Effects of acupuncture clinical practice on finger fine touch of practitioners].

    Science.gov (United States)

    Li, Jing; Sun, Xiao; Wu, Mary X

    2012-12-01

    To observe the effect of clinical acupuncture practice on practitioners finger fine touch, so as to analyze the perceptive procedure of the arrival of qi and to explore its key factors. Fifteen healthy acupuncturists and 15 healthy non-acupuncturists volunteers were recruited in the present study. All the participants were ordered to take a sitting position in a quiet room and to have their eyes covered with two eyeshades first. Then, they were asked to receive two general sensory-perceptual acuity tests: the von Frey hair tests for measuring their cutaneous sensation threshold and two-point discrimination tests of the thumb, index and middle fingers of both hands. In acupuncturists, the average cutaneous sensation thresholds of the thumb and index finger of the handedness and the average two-point discrimination thresholds of the thumb, index finger and the middle finger of the handedness were lower than those of the handedness in non-acupuncturists in spite of no significant differences (P > 0.05). In addition, in acupuncturists, the average cutaneous sensation thresholds of the thumb and index finger and the average two-point discrimination thresholds of the thumb, index finger and the middle finger of the handedness were also slightly lower than those of their non-handedness. While in the non-acupuncturists, both the average cutaneous sensation thresholds and the average two-point discrimination thresholds of the thumb, index finger and the middle finger of the handedness and non-handedness were comparable. The acupuncturists' finger fine touch of the handedness is relatively more sensitive than that of non-acupuncturists, suggesting an increase of the sensitivity of fingers in perceiving "Deqi" through long-term acupuncture clinical practice.

  9. Characterization of mantle convection experiments using two-point correlation functions

    Science.gov (United States)

    Puster, Peter; Jordan, Thomas H.; Hager, Bradford H.

    1995-04-01

    Snapshots of the temperature T(r, phi, t), horizontal flow velocity u(r, phi, t), and radial flow velocity w(r, phi, t) obtained from numerical convection experiments of time-dependent flows in annular cylindrical geometry are taken to be samples of stationary, rotationally invariant random fields. For such a field f(r, phi, t), the spatio-temporal two-point correlation function, C(sub ff)(r, r-prime, delta, t(sub *)), is constructed by averaging over rotational transformations of this ensemble. To assess the structural differences among mantle convection experiments we construct three spartial subfunctions of C(sub ff)(r, r-prime, delta, t(sub *)): the rms variation, sigma(sub f)(r), the radial correlation function, R(sub f)(r, r-prime), and the angular correlation function, A(sub f)(r, delta). R(sub f)(r, r-prime) and A(sub f)(r, r-prime) are symmetric about the loci r = r-prime and delta = 0, respectively, where they achieve their maximum value of unity. The falloff of R(sub f) and A(sub f) away from their symmetry can be quantified by a correlation length rho(sub f)(r) and a correlation angle alpha(sub f)(r), which we define to be the half widths of the central peaks at the correlation level 0.75. The behavior of rho(sub f) is a diagnostic of radial structure, while alpha(sub f) measures average plume width. We have used two-point correlation functions of the temperature field (T-diagnostics) and flow velocity fields (V-diagnostics) to quantify some important aspects of mantle convection experiments. We explore the dependence of different correlation diagnostics on Rayleigh number, internal heating rate, and depth- and temperature-dependent viscosity. For isoviscous flows in an annulus, we show how radial averages of sigma(sub T), rho(sub T), and alpha(sub T) scale with Rayleigh number for various internal heating rates. A break in the power-law relationship at the transition from steady to time-dependent regimes is evident for rho(sub T) and alpha(sub T) but

  10. A NEW METHOD TO CORRECT FOR FIBER COLLISIONS IN GALAXY TWO-POINT STATISTICS

    Energy Technology Data Exchange (ETDEWEB)

    Guo Hong; Zehavi, Idit [Department of Astronomy, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106 (United States); Zheng Zheng [Department of Physics and Astronomy, University of Utah, 115 South 1400 East, Salt Lake City, UT 84112 (United States)

    2012-09-10

    In fiber-fed galaxy redshift surveys, the finite size of the fiber plugs prevents two fibers from being placed too close to one another, limiting the ability to study galaxy clustering on all scales. We present a new method for correcting such fiber collision effects in galaxy clustering statistics based on spectroscopic observations. The target galaxy sample is divided into two distinct populations according to the targeting algorithm of fiber placement, one free of fiber collisions and the other consisting of collided galaxies. The clustering statistics are a combination of the contributions from these two populations. Our method makes use of observations in tile overlap regions to measure the contributions from the collided population, and to therefore recover the full clustering statistics. The method is rooted in solid theoretical ground and is tested extensively on mock galaxy catalogs. We demonstrate that our method can well recover the projected and the full three-dimensional (3D) redshift-space two-point correlation functions (2PCFs) on scales both below and above the fiber collision scale, superior to the commonly used nearest neighbor and angular correction methods. We discuss potential systematic effects in our method. The statistical correction accuracy of our method is only limited by sample variance, which scales down with (the square root of) the volume probed. For a sample similar to the final SDSS-III BOSS galaxy sample, the statistical correction error is expected to be at the level of 1% on scales {approx}0.1-30 h {sup -1} Mpc for the 2PCFs. The systematic error only occurs on small scales, caused by imperfect correction of collision multiplets, and its magnitude is expected to be smaller than 5%. Our correction method, which can be generalized to other clustering statistics as well, enables more accurate measurements of full 3D galaxy clustering on all scales with galaxy redshift surveys.

  11. The science of interpersonal touch: an overview.

    Science.gov (United States)

    Gallace, Alberto; Spence, Charles

    2010-02-01

    Surprisingly little scientific research has been conducted on the topic of interpersonal touch over the years, despite the importance of touch in our everyday social interactions from birth through to adulthood and old age. In this review, we critically evaluate the results of the research on this topic that have emerged from disciplines, such as cognitive and social psychology, neuroscience, and cultural anthropology. We highlight some of the most important advances to have been made in our understanding of this topic: For example, research has shown that interpersonal tactile stimulation provides an effective means of influencing people's social behaviors (such as modulating their tendency to comply with requests, in affecting people's attitudes toward specific services, in creating bonds between couples or groups, and in strengthening romantic relationships), regardless of whether or not the tactile contact itself can be remembered explicitly. What is more, interpersonal touch can be used to communicate emotion in a manner similar to that demonstrated previously in vision and audition. The recent growth of studies investigating the potential introduction of tactile sensations to long-distance communication technologies (by means of mediated or 'virtual' touch) are also reviewed briefly. Finally, we highlight the synergistic effort that will be needed by researchers in different disciplines if we are to develop a more complete understanding of interpersonal touch in the years to come.

  12. Perception of touch quality in piano tones.

    Science.gov (United States)

    Goebl, Werner; Bresin, Roberto; Fujinaga, Ichiro

    2014-11-01

    Both timbre and dynamics of isolated piano tones are determined exclusively by the speed with which the hammer hits the strings. This physical view has been challenged by pianists who emphasize the importance of the way the keyboard is touched. This article presents empirical evidence from two perception experiments showing that touch-dependent sound components make sounds with identical hammer velocities but produced with different touch forms clearly distinguishable. The first experiment focused on finger-key sounds: musicians could identify pressed and struck touches. When the finger-key sounds were removed from the sounds, the effect vanished, suggesting that these sounds were the primary identification cue. The second experiment looked at key-keyframe sounds that occur when the key reaches key-bottom. Key-bottom impact was identified from key motion measured by a computer-controlled piano. Musicians were able to discriminate between piano tones that contain a key-bottom sound from those that do not. However, this effect might be attributable to sounds associated with the mechanical components of the piano action. In addition to the demonstrated acoustical effects of different touch forms, visual and tactile modalities may play important roles during piano performance that influence the production and perception of musical expression on the piano.

  13. Transparent biocompatible sensor patches for touch sensitive prosthetic limbs

    KAUST Repository

    Nag, Anindya

    2016-12-26

    The paper presents the fabrication of transparent, flexible sensor patches developed using a casting technique with polydimethylsiloxane (PDMS) as substrate and a nanocomposite of carbon nanotubes (CNTs) and PDMS as interdigital electrodes. The electrodes act as strain sensitive capacitor. The prototypes were used as touch sensitive sensors attached to the limbs. Experiments results show the sensitivity of the patches towards tactile sensing. The results are very promising and can play a key role in the development of a cost efficient sensing system attached to prosthetic limbs.

  14. 声触诊组织量化技术在预测肝纤维化患者门静脉高压发生风险中的价值%Value ofvirtual touch tissues quantification technique in predicting the occurrence risk of portal hyperten-sion of patients suffering from hepatic fibrosis

    Institute of Scientific and Technical Information of China (English)

    王琳; 蔡丽萍; 孙燕双

    2015-01-01

    Objective To research the value of virtual touch tissues quantification technique in predicting the occurrence risk of portal hypertension of patients suffering from hepatic fibrosis. Methods Siemens Acuson S2000 ultrasonic diagnostic apparatus was used to conduct common color Doppler ultrasonic examination and liver VTQ test on 61 examinees ( including healthy people and pa⁃tients suffering from chronic liver diseases) , and the relativity among all parameters were compared. Results With the portal hyper⁃tension becoming more and more serious, the patients'liver VTQ value increased with it, portal vein diameter became wide and portal vein peak velocity reduced. There is a certain relativity between them. The test results of the liver VTQ value of the patients suffering from hepatic fibrosis in this region show that when the liver VTQ value is larger than 2.23 m/s, the occurrence risk of portal hyperten⁃sion of patients will significantly rise. Conclusion Virtual touch tissues quantification technique is of a certain value in predicting the occurrence risk of portal hypertension of patients suffering from hepatic fibrosis.%目的:研究声触诊组织量化( VTQ)技术在预测肝纤维化患者门静脉高压发生风险中的价值。方法使用西门子Acuson S2000超声诊断仪,对61例受检者(包括除外肝病史的就诊患者和慢性肝病患者)进行普通彩超检查及肝脏VTQ值测量,对比研究各参数之间的相关性。结果慢性肝病患者随着门静脉高压程度的加重,肝脏VTQ值增大,门静脉内径增宽,门静脉峰值流速减低,各参数之间有一定相关性。根据本地区肝纤维化患者肝脏VTQ检测结果显示,当肝脏VTQ值大于2�23 m/s时,患者发生门静脉高压的风险显著提高。结论声触诊组织量化技术在预测肝纤维化患者门静脉高压发生风险中具有一定价值。

  15. Mirror Neurons and Mirror-Touch Synesthesia.

    Science.gov (United States)

    Linkovski, Omer; Katzin, Naama; Salti, Moti

    2016-05-30

    Since mirror neurons were introduced to the neuroscientific community more than 20 years ago, they have become an elegant and intuitive account for different cognitive mechanisms (e.g., empathy, goal understanding) and conditions (e.g., autism spectrum disorders). Recently, mirror neurons were suggested to be the mechanism underlying a specific type of synesthesia. Mirror-touch synesthesia is a phenomenon in which individuals experience somatosensory sensations when seeing someone else being touched. Appealing as it is, careful delineation is required when applying this mechanism. Using the mirror-touch synesthesia case, we put forward theoretical and methodological issues that should be addressed before relying on the mirror-neurons account. © The Author(s) 2016.

  16. Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens

    Directory of Open Access Journals (Sweden)

    Mohamed Gamal Ahmed Mohamed

    2015-01-01

    Full Text Available A novel touch screen control technique is introduced, which scans each frame in two steps of concurrent multichannel driving and differential sensing. The proposed technique substantially increases the scan rate and reduces the ambient noise effectively. It is also extended to a multichip architecture to support excessively large touch screens with great scan rate improvement. The proposed method has been implemented using 0.18 μm CMOS TowerJazz process and tested with FPGA and AFE board connecting a 23-inch touch screen. Experimental results show a scan rate improvement of up to 23.8 times and an SNR improvement of 24.6 dB over the conventional method.

  17. A High Optical Transmittance and Low Cost Touch Screen without Patterning

    Directory of Open Access Journals (Sweden)

    SAMADZAMINI, K.

    2017-02-01

    Full Text Available Transparent Conducting Oxide (TCO materials such as Fluorine Tin Oxide (FTO and Indium Tin Oxide (ITO due to their optical and electrical properties are used in touch screens as electrodes and wires. This paper proposes a novel technique of using Electrical Resistivity Tomography (ERT method in order to produce touch screens without pattering. Unlike existing techniques, the proposed methodology employs a uniform TCO coated screen with a maximum optical transmittance to convert the touch point coordinates into side electrodes voltages. The performance of the proposed method is tested experimentally on a FTO coated glass with a sheet resistance of 20 ohms/sq. The proposed methodology is found to be less complicated and low cost, since no pattern or electrodes are implemented in the display area.

  18. Sencha Touch Mobile JavaScript Framework

    CERN Document Server

    Rao, SSVV Narasimha

    2012-01-01

    This book is a step-by-step tutorial aimed at beginners to Sencha Touch. There is ready sample code explained with essential screenshots for better and quicker understanding. This book is ideal for anyone who wants to gain the practical knowledge involved in using Sencha Touch mobile web application framework to make attractive web apps for mobiles. If you have some familiarity with HTML and CSS, then this book is for you. This book will give designers the skills they need to implement their ideas, and provides developers with creative inspiration through practical examples. It is assumed that

  19. iPod Touch portable genius

    CERN Document Server

    McFedries, Paul; McFedries, Paul

    2011-01-01

    Tips, tricks, and shortcuts for getting the most out of Apple's iPod Touch Packed with authoritative, no-nonsense advice for getting the most out of your iPod touch, this hip and sophisticated guide addresses the most used and desired features of this exciting device. The author covers the most essential skills, tools, and shortcuts you need to know in order to become savvy and confident for accomplishing any task necessary. Featuring a handy trim size, this guide goes where you go, offering accessible, useful information immediately at your fingertips. You'll find the hottest tips coupled

  20. Teach and Touch the Earth and Sky

    Science.gov (United States)

    Florina Tendea, Camelia

    2017-04-01

    supplemented attitudes and behaviors that care for their health, for the health of others and to the natural environment, interest and appreciation of logical argument; curiosity and concern about environmental phenomena, independent thinking, creativity. I think that is very important, like teacher, to combine the two parts of teaching: theoretical one and practical one. TEACH means setting a bag of theoretical aspects and also who can provide us support?(ideas, resources, scientific competitions etc.) and TOUCH means practical aspects for teachers & students. Resoults: Participating of teachers and students at workshops, round table, scientific debates provide knowledge about Space in context of STEM disciplines, Hands-on experiences; Find different situations of learning; Ideas, methods and techniques for design new lessons; Real scientific data from ESA/ESERO/ROSA sites; Chance to be part of international projects. Conclusions:Teach and Touch the Earth and Sky - could be a great chance to benefit from the proposed programs of ESA, through which space can be brought into the classroom and used as a tool for teaching and learning, moreover access to actual scientific data and experiences shared by the scientists, or other specialists offers a new prespective in the study of STEM subjects by students.

  1. Experimental Study of the Convergence of Two-Point Cross-Correlation Toward the Green's Function

    Science.gov (United States)

    Gouedard, P.; Roux, P.; Campillo, M.; Verdel, A.; Campman, X.

    2007-12-01

    It has been shown theoretically by several authors that cross-correlation of the seismic motion recorded at two points could yield the Green's Function (GF) between these points. Convergence of cross-correlations toward the GF depends on sources positions and/or the nature of the wavefield. Direct waves from an even distribution of sources can be used to retrieve the GF. On the other hand, in an inhomogeneous medium, recording the diffuse field (coda) is theoretically sufficient to retrieve the GF whatever the sources distribution is. Since none of these two conditions (even distribution of sources or a perfectly diffuse field) is satisfied in practice, the question of convergence toward the GF has to be investigated with real data. A 3D exploration survey with sources and receivers on a dense grid offers such an opportunity. We used a high- resolution survey recorded by Petroleum Development Oman in North Oman. The data have been obtained in a 1x1~km area covered with 1600 geophones located on a 25x25~m-cell grid. Records are 4-seconds long. A unique feature of this survey is that vibrators (working in the [8-120~Hz] frequency band), were located on a similar grid shifted with respect to the receiver grid by half a cell (12.5~m) in both directions. This allows us to compare estimated GF's with measured direct waves (GF's) between the geophones. The shallow subsurface is highly heterogeneous and records include seismic coda. From this dataset, we selected two receiver locations (Ra and Rb) distant from d=158~m. We used both different sets of source locations and time windows to compute the cross-correlation between these two receivers. Then we compared the derivatives of correlation functions with the actual GF measured in Rb (resp.~Ra) for a source close to Ra (resp.~Rb). By doing so, we show the actual influence of source locations and scattering (governed by the records' selected time window) on the Signal-to-Noise Ratio (SNR) of the reconstructed GF. When using

  2. Designing social play through interpersonal touch

    DEFF Research Database (Denmark)

    Padfield, Nicolas; Löwgren, Jonas; Hobye, Mads

    2013-01-01

    We present five design cases as an annotated portfolio, exploring ways to design for intimate, interpersonal touch and social intimacy in interaction design. Five key qualities are elicited from the cases, including novel connotations sparking curiosity; providing an excuse to interact; unfolding...

  3. Families Talking about Ecology at Touch Tanks

    Science.gov (United States)

    Kopczak, Charles; Kisiel, James F.; Rowe, Shawn

    2015-01-01

    Research has demonstrated that conversations among museum, aquarium, and zoo visitors can be a clear indication of active learning, engagement, and participation in scientific reasoning. This descriptive study sought to determine the extent of talk about ecology-related topics exhibited by family groups visiting marine touch tanks at four Pacific…

  4. Families Talking about Ecology at Touch Tanks

    Science.gov (United States)

    Kopczak, Charles; Kisiel, James F.; Rowe, Shawn

    2015-01-01

    Research has demonstrated that conversations among museum, aquarium, and zoo visitors can be a clear indication of active learning, engagement, and participation in scientific reasoning. This descriptive study sought to determine the extent of talk about ecology-related topics exhibited by family groups visiting marine touch tanks at four Pacific…

  5. Teaching Touch Rugby in Physical Education Classes

    Science.gov (United States)

    Pugh, Steven F.; Alford, Alan

    2004-01-01

    Physical educators are always looking for new ideas that introduce moderate-to-vigorous activity, involve skill, encourage teamwork, and increase student interest. Touch rugby has the potential to contribute to these outcomes. Though the sport is not new, it is not a mainstream sport. Therefore, students see it as something new. Their motivation…

  6. Touching Virtual Agents: Embodiment and Mind

    NARCIS (Netherlands)

    Huisman, Gijs; Bruijnes, Merijn; Kolkmeier, Jan; Kolkmeier, Jan; Jung, Merel Madeleine; Darriba Frederiks, Aduén; Rybarczyk, Yves

    In this paper we outline the design and development of an embodied conversational agent setup that incorporates an augmented reality screen and tactile sleeve. With this setup the agent can visually and physically touch the user. We provide a literature overview of embodied conversational agents, as

  7. RECOGNITION AND VERIFICATION OF TOUCHING HANDWRITTEN NUMERALS

    NARCIS (Netherlands)

    Zhou, J.; Kryzak, A.; Suen, C.Y.

    2004-01-01

    In the field of financial document processing, recognition of touching handwritten numerals has been limited by lack of good benchmarking databases and low reliability of algorithms. This paper addresses the efforts toward solving the two problems. Two databases IRIS-Bell\\\\\\'98 and TNIST are built/o

  8. Touching virtual agents: embodiment and mind

    NARCIS (Netherlands)

    Huisman, Gijs; Bruijnes, Merijn; Kolkmeier, Jan; Jung, Merel; Darriba Frederiks, Aduén; Rybarczyk, Yves

    2014-01-01

    In this paper we outline the design and development of an embodied conversational agent setup that incorporates an augmented reality screen and tactile sleeve. With this setup the agent can visually and physically touch the user. We provide a literature overview of embodied conversational agents, as

  9. Touch Screen Tablets and Emergent Literacy

    Science.gov (United States)

    Neumann, Michelle M.; Neumann, David L.

    2014-01-01

    The use of touch screen tablets by young children is increasing in the home and in early childhood settings. The simple tactile interface and finger-based operating features of tablets may facilitate preschoolers' use of tablet application software and support their educational development in domains such as literacy. This article reviews…

  10. Touch sensitive electrorheological fluid based tactile display

    Science.gov (United States)

    Liu, Yanju; Davidson, Rob; Taylor, Paul

    2005-12-01

    A tactile display is programmable device whose controlled surface is intended to be investigated by human touch. It has a great number of potential applications in the field of virtual reality and elsewhere. In this research, a 5 × 5 tactile display array including electrorheological (ER) fluid has been developed and investigated. Force responses of the tactile display array have been measured while a probe was moved across the upper surface. The purpose of this was to simulate the action of touch performed by human finger. Experimental results show that the sensed surface information could be controlled effectively by adjusting the voltage activation pattern imposed on the tactels. The performance of the tactile display is durable and repeatable. The touch sensitivity of this ER fluid based tactile display array has also been investigated in this research. The results show that it is possible to sense the touching force normal to the display's surface by monitoring the change of current passing through the ER fluid. These encouraging results are helpful for constructing a new type of tactile display based on ER fluid which can act as both sensor and actuator at the same time.

  11. Simulated Social Touch in a Collaborative Game

    NARCIS (Netherlands)

    Huisman, Gijs; Kolkmeijer, Jan; Heylen, Dirk K.J.; Auvray, Malika; Duriez, Christian

    2014-01-01

    In this paper we present a study in which participants played a collaborative augmented reality game together with two virtual agents, visible in the same augmented reality space. During interaction one of the virtual agents touches the user on the arm, by means of a vibrotactile display. We investi

  12. Preview Screening of Documentary Touching the Tigers

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    <正>While CPAFFC Vice President Li Xiaolin visited the U.S.from April 11 to 16,a preview of the documentary film Touching the Tigers,a memorial to the great contribution American pilots made to China’s War of Resistance against Japanese Aggression in WWII,was screened at the Chinese Embassy in Washington,D.C.

  13. The Role of Touch in Facilitated Communication.

    Science.gov (United States)

    Kezuka, Emiko

    1997-01-01

    A study investigated the role of touch in the use of facilitated communication with Japanese individuals with autism. Five experiments were conducted involving a "telepathy game" using a rod with an attached strain gauge. Results found the facilitator's contact controlled the motor responses of the subjects. (Author/CR)

  14. An fMRI study on cortical responses during active self-touch and passive touch from others

    Directory of Open Access Journals (Sweden)

    Rochelle eAckerley

    2012-08-01

    Full Text Available Active, self-touch and the passive touch from an external source engage comparable afferent mechanoreceptors on the touched skin site. However, touch directed to glabrous skin compared to hairy skin will activate different types of afferent mechanoreceptors. Despite perceptual similarities between touch to different body sites, it is likely that the touch information is processed differently. In the present study, we used functional magnetic resonance imaging (fMRI to elucidate the cortical differences in the neural signal of touch representations during active, self-touch and passive touch from another, to both glabrous (palm and hairy (arm skin, where a soft brush was used as the stimulus. There were two active touch conditions, where the participant used the brush in their right hand to stroke either their left palm or arm. There were two similar passive, touch conditions where the experimenter used an identical brush to stroke the same palm and arm areas on the participant. Touch on the left palm elicited a large, significant, positive blood-oxygenation level dependence (BOLD signal in right sensorimotor areas. Less extensive activity was found for touch to the arm. Separate somatotopical palm and arm representations were found in Brodmann area 3 of the right primary somatosensory cortex (SI and in both these areas, active stroking gave significantly higher signals than passive stroking. Active, self-touch elicited a positive BOLD signal in a network of sensorimotor cortical areas in the left hemisphere, compared to the resting baseline. In contrast, during passive touch, a significant negative BOLD signal was found in the left SI. Thus, each of the four conditions had a unique cortical signature despite similarities in afferent signalling or evoked perception. It is hypothesized that attentional mechanisms play a role in the modulation of the touch signal in the right SI, accounting for the differences found between active and passive touch.

  15. A Design Study of Direct-Touch Interaction for Exploratory 3D Scientific Visualization

    NARCIS (Netherlands)

    Klein, Tijmen; Gueniat, Florimond; Pastur, Luc; Vernier, Frederic; Isenberg, Tobias

    2012-01-01

    We present an interaction design study of several non-overlapping direct-touch interaction widgets, postures, and bi-manual techniques to support the needs of scientists who are exploring a dataset. The final interaction design supports navigation/zoom, cutting plane interaction, a drilling explorat

  16. A Design Study of Direct-Touch Interaction for Exploratory 3D Scientific Visualization

    NARCIS (Netherlands)

    Klein, Tijmen; Gueniat, Florimond; Pastur, Luc; Vernier, Frederic; Isenberg, Tobias

    2012-01-01

    We present an interaction design study of several non-overlapping direct-touch interaction widgets, postures, and bi-manual techniques to support the needs of scientists who are exploring a dataset. The final interaction design supports navigation/zoom, cutting plane interaction, a drilling explorat

  17. "A touch of physiotherapy" - the significance and meaning of touch in the practice of physiotherapy.

    Science.gov (United States)

    Bjorbækmo, Wenche Schrøder; Mengshoel, Anne Marit

    2016-01-01

    Touch, while ubiquitous and ever present in the practice of physiotherapy, is conspicuously absent from physiotherapy-related research. Based on a theoretical perspective inspired by phenomenology, this article explores and elaborates on the meaning and significance of touch in the practice of physiotherapy. The research data were generated through 16 close observations conducted in primary care clinics, and through interviews with 9 physiotherapists and with 9 patients suffering from chronic neck problems. The findings revealed how the use of touch in the practice of physiotherapy brings people into proximity in ways more complex than simple skin-to-skin contact. Through nontouch, touch, and movements, physiotherapists invite their patients to participate in the process of creating and performing therapy; dialogue through touch and movement is vital. Touch in physiotherapy depends on the physiotherapist's embodied skills; those they cultivate in order to respectfully listen to their patients and guide them to explore their own bodily capacity, limits and possibilities. The findings also suggest that observing therapy from outside and from participating in it offer significant different experiences, information, understanding, and meanings. The differences between physiotherapy as observed expression and as lived experience would seem to have important implications for understanding the practice of physiotherapy.

  18. A neural network based approach to social touch classification

    NARCIS (Netherlands)

    van Wingerden, Siewart; Uebbing, Tobias J.; Jung, Merel Madeleine; Poel, Mannes

    Touch is an important interaction modality in social interaction, for instance touch can communicate emotions and can intensify emotions communicated by other modalities. In this paper we explore the use of Neural Networks for the classification of touch. The exploration and assessment of Neural

  19. Friendly touch increases gratitude by inducing communal feelings.

    Science.gov (United States)

    Simão, Cláudia; Seibt, Beate

    2015-01-01

    Communion among people is easily identifiable. Close friends or relatives frequently touch each other and this physical contact helps identifying the type of relationship they have. We tested whether a friendly touch and benefits elicit the emotion of gratitude given the close link between gratitude and communal relations. In Study 1, we induced a communal mindset and manipulated friendly touch (vs. non-touch) and benefit to female participants by a female confederate. We measured pre- and post-benefit gratitude, communal feelings, and liking toward the toucher, as well as general affect. In Study 2, we manipulated mindset, friendly touch and benefit, and measured the same variables in female pairs (confederate and participants). In both studies the results showed a main effect of touch on pre-benefit gratitude: participants who were touched by the confederate indicated more gratitude than those not touched. Moreover, benefit increased gratitude toward a confederate in the absence of touch, but not in the presence of touch. Additionally, perceiving the relationship as communal, and not merely liking the confederate, or a positive mood mediated the link between touch and gratitude. The results further support a causal model where touch increases communal feelings, which in turn increase gratitude at the end of the interaction, after having received a benefit from the interaction partner. These results support a broader definition of gratitude as an emotion embodied in communal relationship cues.

  20. Friendly touch increases gratitude by inducing communal feelings

    Directory of Open Access Journals (Sweden)

    Cláudia eSimão

    2015-06-01

    Full Text Available Communion among people is easily identifiable. Close friends or relatives frequently touch each other and this physical contact helps identifying the type of relationship they have. We tested whether a friendly touch and benefits elicit the emotion of gratitude given the close link between gratitude and communal relations. In Study 1 we induced a communal mindset and manipulated friendly touch (vs. non-touch and benefit to female participants by a female confederate. We measured pre- and post-benefit gratitude, communal feelings, and liking towards the toucher, as well as general affect. In Study 2 we manipulated mindset, friendly touch and benefit, and measured the same variables in female pairs (confederate and participants. In both studies the results showed a main effect of touch on pre-benefit gratitude: participants who were touched by the confederate indicated more gratitude than those not touched. Moreover, benefit increased gratitude towards a confederate in the absence of touch, but not in the presence of touch. Additionally, perceiving the relationship as communal, and not merely liking the confederate, or a positive mood mediated the link between touch and gratitude. The results further support a causal model where touch increases communal feelings, which in turn increase gratitude at the end of the interaction, after having received a benefit from the interaction partner. These results support a broader definition of gratitude as an emotion embodied in communal relationship cues.

  1. Therapeutic Touch and Healing Meditation: A Threesome with Education.

    Science.gov (United States)

    Greenspan, Marlene

    1994-01-01

    Briefly reviews the use of therapeutic touch in early Western culture and Judaic tradition and by modern practitioners. Discusses modern scientific approaches to therapeutic touch, including its use by nurses. Offers suggestions for and examples of the use of meditation, relaxation exercises, and therapeutic touch with adolescents in classroom and…

  2. Is high touch finally here?

    Science.gov (United States)

    Kennedy, M M

    1998-01-01

    Can anyone single-handedly create a caring environment without adding hours to his or her work week? As turnover continues to rise, it's worth considering. Techniques managers say have worked for them are suggested, including: Monitor workloads; celebrate successes; make niceness an expectation; mentor; offer training as often as possible; stamp out problems before they go public; consider offering flexible hours and extended leaves for all; and introduce yeast to keep people stimulated. Will these strategies--all of which may not work for you--fatten your bonus this year? Probably not, unless top management is monitoring retention and doing occasional exit interviews. However, one of the byproducts is that employees don't stop with each other. They begin to treat patients better, something neither bribery nor threats may produce.

  3. Cognitive influences on the affective representation of touch and the sight of touch in the human brain

    National Research Council Canada - National Science Library

    McCabe, Ciara; Rolls, Edmund T; Bilderbeck, Amy; McGlone, Francis

    2008-01-01

    We show that the affective experience of touch and the sight of touch can be modulated by cognition, and investigate in an fMRI study where top-down cognitive modulations of bottom-up somatosensory...

  4. CGLXTouch: A multi-user multi-touch approach for ultra-high-resolution collaborative workspaces

    KAUST Repository

    Ponto, Kevin

    2011-06-01

    This paper presents an approach for empowering collaborative workspaces through ultra-high resolution tiled display environments concurrently interfaced with multiple multi-touch devices. Multi-touch table devices are supported along with portable multi-touch tablet and phone devices, which can be added to and removed from the system on the fly. Events from these devices are tagged with a device identifier and are synchronized with the distributed display environment, enabling multi-user support. As many portable devices are not equipped to render content directly, a remotely scene is streamed in. The presented approach scales for large numbers of devices, providing access to a multitude of hands-on techniques for collaborative data analysis. © 2011 Elsevier B.V. All rights reserved.

  5. Two-point discrimination of the upper extremities of healthy Koreans in their 20’s

    Science.gov (United States)

    Koo, Ja-Pung; Kim, Soon-Hee; An, Ho-Jung; Moon, Ok-Gon; Choi, Jung-Hyun; Yun, Young-Dae; Park, Joo-Hyun; Min, Kyoung-Ok

    2016-01-01

    [Purpose] The present study attempted to measure two-point discrimination in the upper extremities of healthy Koreans in their 20’s. [Subjects and Methods] Using a three-point esthesiometer, we conducted an experiment with a group of 256 college students (128 male and 128 female), attending N University in Chonan, Republic of Korea. [Results] Females showed two-point discrimination at a shorter distance than males at the following points: (i) 5 cm above the elbow joint, the middle part, and 5 cm below the shoulder joint of the anterior upper arm; (ii) 5 cm above the elbow joint and 5 cm below the shoulder joint of the posterior upper arm; (iii) 5 cm above the front of the wrist joint of the forearm; 5 cm below the elbow joint, the palmar part of the distal interphalangeal joint of the thumb, the dorsal part of the distal interphalangeal joint of the middle and little fingers. It was also found that females showed greater two-point discrimination than males in distal regions rather than proximal regions. [Conclusion] The findings of this study will help establish normal values for two-point discrimination of upper extremities of young Koreans in their 20’s. PMID:27134375

  6. Two-point boundary value problems and exact controllability for several kinds of linear and nonlinear wave equations

    Energy Technology Data Exchange (ETDEWEB)

    Kong Dexing [Department of Mathematics, Zhejiang University, Hangzhou 310027 (China); Sun Qingyou, E-mail: qysun@cms.zju.edu.cn [Center of Mathematical Sciences, Zhejiang University, Hangzhou 310027 (China)

    2011-04-01

    All articles must In this paper we introduce some new concepts for second-order hyperbolic equations: two-point boundary value problem, global exact controllability and exact controllability. For several kinds of important linear and nonlinear wave equations arising from physics and geometry, we prove the existence of smooth solutions of the two-point boundary value problems and show the global exact controllability of these wave equations. In particular, we investigate the two-point boundary value problem for one-dimensional wave equation defined on a closed curve and prove the existence of smooth solution which implies the exact controllability of this kind of wave equation. Furthermore, based on this, we study the two-point boundary value problems for the wave equation defined on a strip with Dirichlet or Neumann boundary conditions and show that the equation still possesses the exact controllability in these cases. Finally, as an application, we introduce the hyperbolic curvature flow and obtain a result analogous to the well-known theorem of Gage and Hamilton for the curvature flow of plane curves.

  7. Critical two-point functions and the lace expansion for spread-out high-dimensional percolation and related models

    NARCIS (Netherlands)

    Van der Hofstad, R.; Hara, T.; Slade, G.

    2003-01-01

    We consider spread-out models of self-avoiding walk, bond percolation, lattice trees and bond lattice animals on ${\\mathbb{Z}^d}$, having long finite-range connections, above their upper critical dimensions $d=4$ (self-avoiding walk), $d=6$ (percolation) and $d=8$ (trees and animals). The two-point

  8. EXISTENCE OF POSITIVE SOLUTION TO TWO-POINT BOUNDARY VALUE PROBLEM FOR A SYSTEM OF SECOND ORDER ORDINARY DIFFERENTIAL EQUATIONS

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    In this paper, we consider a two-point boundary value problem for a system of second order ordinary differential equations. Under some conditions, we show the existence of positive solution to the system of second order ordinary differential equa-tions.

  9. HIGH ACCURACY FINITE VOLUME ELEMENT METHOD FOR TWO-POINT BOUNDARY VALUE PROBLEM OF SECOND ORDER ORDINARY DIFFERENTIAL EQUATIONS

    Institute of Scientific and Technical Information of China (English)

    王同科

    2002-01-01

    In this paper, a high accuracy finite volume element method is presented for two-point boundary value problem of second order ordinary differential equation, which differs fromthe high order generalized difference methods. It is proved that the method has optimal order er-ror estimate O(h3) in H1 norm. Finally, two examples show that the method is effective.

  10. Baryonic effects on weak-lensing two-point statistics and its cosmological implications

    CERN Document Server

    Mohammed, Irshad; Teyssier, Romain; Amara, Adam

    2014-01-01

    We develop an extension of \\textit{the Halo Model} that describes analytically the corrections to the matter power spectrum due to the physics of baryons. We extend these corrections to the weak-lensing shear angular power spectrum. Within each halo, our baryonic model accounts for: 1) a central galaxy, the major stellar component whose properties are derived from abundance matching techniques; 2) a hot plasma in hydrostatic equilibrium and 3) an adiabatically-contracted dark matter component. This analytic approach allows us to compare our model to the dark-matter-only case. Our basic assumptions are tested against the hydrodynamical simulations of Martizzi et. al. (2014), with which a remarkable agreement is found. Our baryonic model has only one free parameter, $M_{\\rm crit}$, the critical halo mass that marks the transition between feedback-dominated halos, mostly devoid of gas, and gas rich halos, in which AGN feedback effects become weaker. We explore the entire cosmological parameter space, using the a...

  11. Phase-uncertainty quality map for two-point Dixon fat-water separation

    Science.gov (United States)

    Schmidt, Maria A.

    2011-09-01

    This work investigates and compares two different phase-correction algorithms for Dixon fat-water separation and two different quality maps (QM) for region-growing: the original QM, based on phase gradients, and a QM based on phase uncertainty, proposed in this article. A spoiled dual-gradient-echo sequence was employed at 1.5 T to acquire in-phase and out-of-phase images of joints, parotid glands, abdomen and test objects. All 97 datasets were processed eight times each: with two different phase correction algorithms (original and hierarchical phase correction), with two different QM, and with/without removing linear component of the phase drifts associated with dual-echo acquisitions and bipolar readout gradient waveforms. The linear component of the phase drift along the readout direction was found to reach 4.1° pixel-1, depending on the geometric parameters. Pre-processing to remove linear phase shifts has little impact on outcome. The hierarchic phase-correction algorithm outperformed the original phase-correction algorithm in all applications. The proposed phase-uncertainty QM provides a small performance improvement in clinical images, but can be vulnerable to flow-related phase shifts in bright vessels. Overall the most successful phase-correction technique employed phase-uncertainty QMs and hierarchic algorithms, with pre-processing to correct the linear phase drift associated with dual-echo acquisitions and bipolar readout gradient waveform.

  12. Integrating optical finger motion tracking with surface touch events.

    Science.gov (United States)

    MacRitchie, Jennifer; McPherson, Andrew P

    2015-01-01

    This paper presents a method of integrating two contrasting sensor systems for studying human interaction with a mechanical system, using piano performance as the case study. Piano technique requires both precise small-scale motion of fingers on the key surfaces and planned large-scale movement of the hands and arms. Where studies of performance often focus on one of these scales in isolation, this paper investigates the relationship between them. Two sensor systems were installed on an acoustic grand piano: a monocular high-speed camera tracking the position of painted markers on the hands, and capacitive touch sensors attach to the key surfaces which measure the location of finger-key contacts. This paper highlights a method of fusing the data from these systems, including temporal and spatial alignment, segmentation into notes and automatic fingering annotation. Three case studies demonstrate the utility of the multi-sensor data: analysis of finger flexion or extension based on touch and camera marker location, timing analysis of finger-key contact preceding and following key presses, and characterization of individual finger movements in the transitions between successive key presses. Piano performance is the focus of this paper, but the sensor method could equally apply to other fine motor control scenarios, with applications to human-computer interaction.

  13. Integrating optical finger motion tracking with surface touch events

    Directory of Open Access Journals (Sweden)

    Jennifer eMacRitchie

    2015-06-01

    Full Text Available This paper presents a method of integrating two contrasting sensor systems for studying human interaction with a mechanical system, using piano performance as the case study. Piano technique requires both precise small-scale motion of fingers on the key surfaces and planned large-scale movement of the hands and arms. Where studies of performance often focus on one of these scales in isolation, this paper investigates the relationship between them. Two sensor systems were installed on an acoustic grand piano: a monocular high-speed camera tracking the position of painted markers on the hands, and capacitive touch sensors attach to the key surfaces which measure the location of finger-key contacts. This paper highlights a method of fusing the data from these systems, including temporal and spatial alignment, segmentation into notes and automatic fingering annotation. Three case studies demonstrate the utility of the multi-sensor data: analysis of finger flexion or extension based on touch and camera marker location, timing analysis of finger-key contact preceding and following key presses, and characterisation of individual finger movements in the transitions between successive key presses. Piano performance is the focus of this paper, but the sensor method could equally apply to other fine motor control scenarios, with applications to human-computer interaction.

  14. Lamb Wave Multi-touch Ultrasonic Touchscreen.

    Science.gov (United States)

    Firouzi, Kamyar; Nikoozadeh, Amin; Carver, Thomas; Khuri-Yakub, Butrus

    2016-09-13

    Touchscreen sensors are widely used in many devices such as smart phones, tablets, laptops, etc., with diverse applications. We present the design, analysis, and implementation of an ultrasonic touchscreen system that utilizes interaction of transient Lamb waves with objects in contact with the screen. It attempts to improve on the existing ultrasound technologies, with the potential of addressing some of the weaknesses of the dominant technologies, such as the capacitive or resistive ones. Compared to the existing ultrasonic and acoustic modalities, among other advantages, it provides the capability of detecting several simultaneous touch points, and also a more robust performance. The localization algorithm, given the hardware design, can detect several touch points with a very limited number of measurements (one or two). This in turn can significantly reduce the manufacturing cost.

  15. Influence of the body schema on mirror-touch synesthesia.

    Science.gov (United States)

    Medina, Jared; DePasquale, Carrie

    2017-03-01

    Individuals with mirror-touch synesthesia (MTS) report feeling touch on their own body when seeing someone else being touched. We examined how the body schema - an on-line representation of body position in space - is involved in mapping touch from a viewed body to one's own body. We showed 45 mirror-touch synesthetes videos of a hand being touched, varying the location of the viewed touch by hand (left, right), skin surface (palmar, dorsal) and finger (index, ring). Participant hand posture was either congruent or incongruent with the posture of the viewed hand. After seeing the video, participants were asked to report whether they felt touch on their own body and, if so, the intensity and location of their percepts. We found that participants reported more frequent and more veridical (i.e., felt at the same somatotopic location as the viewed touch) mirror-touch percepts on posturally congruent versus posturally incongruent trials. Furthermore, participant response patterns varied as a function of postural congruence. Some participants consistently felt sensations on the hand surface that was stimulated in the video - even if their hands were in the opposite posture. Other participants' responses were modulated based on their own hand position, such that percepts were more likely to be felt on the upright, plausible hand surface in the posturally incongruent condition. These results provide evidence that mapping viewed touch to one's own body involves an on-line representation of body position in space. Copyright © 2016 Elsevier Ltd. All rights reserved.

  16. Touch receptor of venous flytrap, Dionaea muscipula.

    Science.gov (United States)

    DiPalma, J R; McMichael, R; DiPalma, M

    1966-04-22

    Numerous small structures (stellate trichomnes) protrude from the surface of marginal hairs, outer leaf surface, and stem of Dionaea muscipula Ellis. None are present inside the trap. Mechanical stimulation causes small action potentials and eventual closure of the trap, independently of the sensitive trigger hairs. Subthreshold stimulation of these structures appears to sensitize the trigger hairs and facilitate closure of the trap. This suiggests that these structures act as touch sensors or receptors.

  17. Emotional modulation of touch in alexithymia.

    Science.gov (United States)

    Scarpazza, Cristina; di Pellegrino, Giuseppe; Làdavas, Elisabetta

    2014-06-01

    Alexithymia refers to difficulties in recognizing one's own emotions, but difficulties have also been found in the recognition of others' emotions, particularly when the task is not easy. Previous research has demonstrated that, in order to understand other peoples' feelings, observers remap the observed emotion onto their own sensory systems. The aim of the present study was to investigate the ability of high and low alexithymic subjects to remap the emotional expressions of others onto their own somatosensory systems using an indirect task. We used the emotional Visual Remapping of Touch (eVRT) paradigm, in which seeing a face being touched improves detection of near-threshold tactile stimulation concurrently delivered to one's own face. In eVRT, subjects performance is influenced by the emotional content of the stimuli, while they were required to distinguish between unilateral or bilateral tactile stimulation on their own cheeks. The results show that tactile perception was enhanced when viewing touch on a fearful face compared with viewing touch on other expressions in low but not in high alexithymic participants. A negative correlation between TAS-20 alexithymia subscale ("difficulty in identify feelings") and the magnitude of the eVRT effect was also found. Conversely, arousal and valence ratings of emotional faces did not vary as a function of the degree of alexithymia. The results provide evidence that alexithymia is associated with difficulties in remapping seen emotions, particularly fear, onto one's own sensory system. This impairment could be due to an inability to modulate somatosensory system activity according to the observed emotional expression.

  18. Sensory and Emotional Perception of Wooden Surfaces through Fingertip Touch

    Science.gov (United States)

    Bhatta, Shiv R.; Tiippana, Kaisa; Vahtikari, Katja; Hughes, Mark; Kyttä, Marketta

    2017-01-01

    Previous studies on tactile experiences have investigated a wide range of material surfaces across various skin sites of the human body in self-touch or other touch modes. Here, we investigate whether the sensory and emotional aspects of touch are related when evaluating wooden surfaces using fingertips in the absence of other sensory modalities. Twenty participants evaluated eight different pine and oak wood surfaces, using sensory and emotional touch descriptors, through the lateral motion of active fingertip exploration. The data showed that natural and smooth wood surfaces were perceived more positively in emotional touch than coated surfaces. We highlight the importance of preserving the naturalness of the surface texture in the process of wood-surface treatment so as to improve positive touch experiences, as well as avoid negative ones. We argue that the results may offer possibilities in the design of wood-based interior products with a view to improving consumer touch experiences. PMID:28348541

  19. Mapping quantal touch using 7 Tesla functional magnetic resonance imaging and single-unit intraneural microstimulation.

    OpenAIRE

    Sanchez Panchuelo, Rosa; Ackerley, Rochelle M.; Glover, Paul M.; Bowtell, Richard W; Wessberg, Johan; Francis, Susan T.; McGlone, Francis

    2016-01-01

    eLife digest The skin contains multiple types of sensory nerves that inform the brain about events occurring on the surface of the body. One way to study how this process works is to insert a very fine needle through the skin to stimulate a single sensory nerve with a small electrical current. This technique – known as intraneural microstimulation – can activate touch responses in the brain without an object actually contacting the skin. Another technique called functional magnetic resonance ...

  20. On a two-point boundary value problem for second-order differential inclusions on Riemannian manifolds

    Directory of Open Access Journals (Sweden)

    Andrei V. Obukhovskiĭ

    2003-05-01

    Full Text Available We consider second-order differential inclusions on a Riemannian manifold with lower semicontinuous right-hand sides. Several existence theorems for solutions of two-point boundary value problem are proved to be interpreted as controllability of special mechanical systems with control on nonlinear configuration spaces. As an application, a statement of controllability under extreme values of controlling force is obtained.

  1. Rigid internal fixation of zygoma fractures: A comparison of two-point and three-point fixation

    Directory of Open Access Journals (Sweden)

    Parashar Atul

    2007-01-01

    Full Text Available Background: Displaced fractures of the zygomatic bone can result in significant functional and aesthetic sequelae. Therefore the treatment must achieve adequate and stable reduction at fracture sites so as to restore the complex multidimensional relationship of the zygoma to the surrounding craniofacial skeleton. Many experimental biophysical studies have compared stability of zygoma after one, two and three-point fixation with mini plates. We conducted a prospective clinical study comparing functional and aesthetic results of two-point and three-point fixation with mini plates in patients with fractures of zygoma. Materials and Methods: Twenty-two patients with isolated zygomatic fractures over a period of one year were randomly assigned into two-point and three-point fixation groups. Results of fixation were analyzed after completion of three months. This included clinical, radiological and photographic evaluation. Results: The three-point fixation group maintained better stability at fracture sites resulting in decreased incidence of dystopia and enophthalmos. This group also had better malar projection and malar height as measured radiologically, when compared with the two-point fixation group. Conclusion: We recommend three-point rigid fixation of fractured zygoma after accurate reduction so as to maintain adequate stabilization against masticatory forces during fracture healing phase.

  2. The design of light pipe with microstructures for touch screen

    Science.gov (United States)

    Yang, Bo; Lu, Kan; Liu, Pengfei; Wei, Xiaona

    2010-11-01

    Touch screen has a very wide range of applications. Most of them are used in public information inquiries, for instance, service inquiries in telecommunication bureau, tax bureau, bank system, electric department, etc...Touch screen can also be used for entertainment and virtual reality applications too. Traditionally, touch screen was composed of pairs of infrared LED and correspondent receivers which were all installed in the screen frame. Arrays of LED were set in the adjacent sides of the frame of an infrared touch screen while arrays of the infrared receivers were fixed in each opposite side, so that the infrared detecting network was formed. While the infrared touch screen has some technical limitations nowadays such as the low resolution, limitations of touching methods and fault response due to environmental disturbances. The plastic material has a relatively high absorption rate for infrared light, which greatly limits the size of the touch screen. Our design uses laser diode as source and change the traditional inner structure of touch screen by using a light pipe with microstructures. The geometric parameters of the light pipe and the microstructures were obtained through equation solving. Simulation results prove that the design method for touch screen proposed in this paper could achieve high resolution and large size of touch screen.

  3. 宏基beTouch E140

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    看来宏基为进军手机市场费了不少心思。这款定位入门级的beTouch E140尽管并未成为众人瞩目的焦点,但硬件配置却毫不含糊,还搭载了Android OS v2.2系统。与它们一起发布的还有一款全键盘E210,喜欢全键盘的米饭不妨去关注一下。

  4. Braille Touch : Mobile Touchscreen Text Entry for the Visually Impaired

    OpenAIRE

    Southern, Caleb; CLawson, James; Frey, Brian; Abowd, Gregory; Romero, Mario

    2012-01-01

    We present a demonstration of BrailleTouch, an accessible keyboard for blind users on a touchscreen smartphone (see Figure 1). Based on the standard Perkins Brailler, BrailleTouch implements a six-key chorded braille soft keyboard [1]. We will briefly introduce audience members to the braille code, and then allow them to hold the BrailleTouch prototype and enter text, with the aid of a visual chart of the braille alphabet. QC 20160418

  5. Sencha Touch 2 mobile JavaScript framework

    CERN Document Server

    Clark, John Earl

    2013-01-01

    Full of explained code and enriched with screenshots, this book is the practical way to take your Sencha Touch skills to the next level.If you want to gain practical knowledge for using the Sencha Touch mobile web application framework, and you are familiar with HTML and CSS, then this book is for you. It is assumed that you know how to use touchscreens, touch events, and mobile devices such as Apple iOS and Google Android.

  6. Reach out and touch somebody's virtual hand : Affectively connected through mediated touch

    NARCIS (Netherlands)

    Toet, A.; Erp, J.B.F. van; Petrignani, F.F.; Dufrasnes, M.H.; Sahhashivan, A.

    2013-01-01

    We present the design of a haptic computer accessory that adds the experience of touch to online conversations. It enables dyads to exchange the physical experience of holding hands regardless of distance and location. Text, speech and video communication systems support the transmission of several

  7. Reach out and touch somebody's virtual hand : Affectively connected through mediated touch

    NARCIS (Netherlands)

    Toet, A.; Erp, J.B.F. van; Petrignani, F.F.; Dufrasnes, M.H.; Sahhashivan, A.

    2013-01-01

    We present the design of a haptic computer accessory that adds the experience of touch to online conversations. It enables dyads to exchange the physical experience of holding hands regardless of distance and location. Text, speech and video communication systems support the transmission of several

  8. Touch in Computer-Mediated Environments: An Analysis of Online Shoppers' Touch-Interface User Experiences

    Science.gov (United States)

    Chung, Sorim

    2016-01-01

    Over the past few years, one of the most fundamental changes in current computer-mediated environments has been input devices, moving from mouse devices to touch interfaces. However, most studies of online retailing have not considered device environments as retail cues that could influence users' shopping behavior. In this research, I examine the…

  9. Touch in Computer-Mediated Environments: An Analysis of Online Shoppers' Touch-Interface User Experiences

    Science.gov (United States)

    Chung, Sorim

    2016-01-01

    Over the past few years, one of the most fundamental changes in current computer-mediated environments has been input devices, moving from mouse devices to touch interfaces. However, most studies of online retailing have not considered device environments as retail cues that could influence users' shopping behavior. In this research, I examine the…

  10. Fracture resistance, two point bending strength and morphological characteristics of pulpless teeth restored with fiber-reinforced composite posts

    Directory of Open Access Journals (Sweden)

    Alfredo Tibúrcio Nunes Pires

    2012-09-01

    Full Text Available Introduction: Fiber-reinforced composite posts (FRC posts have been used for tooth reinforcement after endodontic treatment. The mechanical characteristics of FRC posts can influence the clinical prognostic. Objective: The aim of this study was to evaluate the flexural strength and fracture resistance of commercially available FRC posts Material and methods: Fourteen human single-rooted premolars with completely formed apices were selected and received endodontic treatment. The specimens were divided into two groups related to the post system: i Group A – cylindrical-conical fiber-reinforced post (White post DC, FGM, and ii group B – conical fiber-reinforced post (EXACTO, Angelus. The fracture resistance was evaluated and two point bending tests were carried out. The glass fiber characteristics and the tag penetration of the luting material into the radicular dentin structure were evaluated through scanning electronic microscopy in an illustrative way. One-way ANOVA and Tukey’s HSD test (α = 0.05 were applied. Results: The values obtained for fracture resistance and two point bending test were, respectively, 399.29 N and 109.5 N for group A, and 386.25 N and 119.5 N for group B. No significant differences in strength values among the groups were found. Conclusion: There were no significant statistical differences between the two post groups regarding to fracture strength and two point bending strength. It can be concluded that the posts selected for this study performed satisfactorily in terms of mechanical properties so that they can be used for tooth reinforcement after endodontic treatment.

  11. Explicit Proof of Equivalence of Two-Point Functions in the Two Formalisms of Thermal Field Theory

    Institute of Scientific and Technical Information of China (English)

    ZHOU Bang-Rong

    2002-01-01

    We give an explicit proof of equivalence of the two-point function to one-loop order in the two formalisms of thermal λ3 theory based on the expressions in the real-time formalism and indicate that the key point of completing the proof is to separate carefully the imaginary part of the zero-temperature loop integralfrom relevant expressions and this fact will certainly be very useful for examination of the equivalent problem of two formalisms of thermal field theory in other theories, including the one of the propagators for scalar bound states in an NJL model.

  12. Two-point estimate method for probabilistic optimal power flow computation including wind farms with correlated parameters

    Energy Technology Data Exchange (ETDEWEB)

    Li, Xue; Cao, Jia; Du, Dajun [Shanghai Univ. (China). Key Lab. of Power Station Automation Technology

    2013-07-01

    This paper is concerned with the probabilistic optimal power flow (POPF) calculation including wind farms with correlated parameters which contains nodal injections. The two-point estimate method (2PEM) is employed to solve the POPF. Moreover, the correlation samples between nodal injections and line parameters are generated by Cholesky Factorization method. Simulation results show that 2PEM is feasible and effective to solve the POPF including wind farms with correlated parameters, while the 2PEM has higher computation precision and consume less CPU time than Monte Carlo Simulation.

  13. Doppler term in the galaxy two-point correlation function: wide-angle, velocity, Doppler lensing and cosmic acceleration effects

    OpenAIRE

    Raccanelli, Alvise; Bertacca, Daniele; Jeong, Donghui; Neyrinck, Mark C.; Szalay, Alexander S.

    2016-01-01

    We study the parity-odd part (that we shall call Doppler term) of the linear galaxy two-point correlation function that arises from wide-angle, velocity, Doppler lensing and cosmic acceleration effects. As it is important at low redshift and at large angular separations, the Doppler term is usually neglected in the current generation of galaxy surveys. For future wide-angle galaxy surveys such as Euclid, SPHEREx and SKA, however, we show that the Doppler term must be included. The effect of t...

  14. ON THE EXISTENCE OF SOLUTION OF A NONLINEAR TWO-POINT BOUNDARY VALUE PROBLEM ARISING FROM A LIQUID METAL FLOW

    Institute of Scientific and Technical Information of China (English)

    Cheng Xiaoliang; Ying Weiting

    2005-01-01

    In this paper, we discuss the existence of solution of a nonlinear two-point boundary value problem with a positive parameter Q arising in the study of surfacetension-induced flows of a liquid metal or semiconductor. By applying the Schauder's fixed-point theorem, we prove that the problem admits a solution for 0 ≤ Q ≤ 14.306.It improves the result of 0 ≤ Q < 1 in [2] and 0 ≤ Q ≤ 13.213 in [3].

  15. Enhanced genetic analysis of single human bioparticles recovered by simplified micromanipulation from forensic 'touch DNA' evidence.

    Science.gov (United States)

    Farash, Katherine; Hanson, Erin K; Ballantyne, Jack

    2015-03-09

    DNA profiles can be obtained from 'touch DNA' evidence, which comprises microscopic traces of human biological material. Current methods for the recovery of trace DNA employ cotton swabs or adhesive tape to sample an area of interest. However, such a 'blind-swabbing' approach will co-sample cellular material from the different individuals, even if the individuals' cells are located in geographically distinct locations on the item. Thus, some of the DNA mixtures encountered in touch DNA samples are artificially created by the swabbing itself. In some instances, a victim's DNA may be found in significant excess thus masking any potential perpetrator's DNA. In order to circumvent the challenges with standard recovery and analysis methods, we have developed a lower cost, 'smart analysis' method that results in enhanced genetic analysis of touch DNA evidence. We describe an optimized and efficient micromanipulation recovery strategy for the collection of bio-particles present in touch DNA samples, as well as an enhanced amplification strategy involving a one-step 5 µl microvolume lysis/STR amplification to permit the recovery of STR profiles from the bio-particle donor(s). The use of individual or few (i.e., "clumps") bioparticles results in the ability to obtain single source profiles. These procedures represent alternative enhanced techniques for the isolation and analysis of single bioparticles from forensic touch DNA evidence. While not necessary in every forensic investigation, the method could be highly beneficial for the recovery of a single source perpetrator DNA profile in cases involving physical assault (e.g., strangulation) that may not be possible using standard analysis techniques. Additionally, the strategies developed here offer an opportunity to obtain genetic information at the single cell level from a variety of other non-forensic trace biological material.

  16. Therapeutic touch and post-Hurricane Hugo stress.

    Science.gov (United States)

    Olson, M; Sneed, N; Bonadonna, R; Ratliff, J; Dias, J

    1992-06-01

    This repeated-session design sought to answer questions about the effectiveness of therapeutic touch in reduction of stress for 23 individuals following a natural disaster. In addition, methodological issues related to the average length of time for a therapeutic-touch treatment and a method of documenting the nonverbal interaction between subject and toucher were investigated. Findings indicate that stressed people report themselves to be less stressed following therapeutic touch (p = .05). Time of therapeutic-touch intervention varied significantly between the touchers, with a range of 6.8 to 20 minutes. Qualitative data examining the interaction of toucher and subject raised a number of questions that require further study.

  17. Children's Learning from Touch Screens: A Dual Representation Perspective.

    Science.gov (United States)

    Sheehan, Kelly J; Uttal, David H

    2016-01-01

    Parents and educators often expect that children will learn from touch screen devices, such as during joint e-book reading. Therefore an essential question is whether young children understand that the touch screen can be a symbolic medium - that entities represented on the touch screen can refer to entities in the real world. Research on symbolic development suggests that symbolic understanding requires that children develop dual representational abilities, meaning children need to appreciate that a symbol is an object in itself (i.e., picture of a dog) while also being a representation of something else (i.e., the real dog). Drawing on classic research on symbols and new research on children's learning from touch screens, we offer the perspective that children's ability to learn from the touch screen as a symbolic medium depends on the effect of interactivity on children's developing dual representational abilities. Although previous research on dual representation suggests the interactive nature of the touch screen might make it difficult for young children to use as a symbolic medium, the unique interactive affordances may help alleviate this difficulty. More research needs to investigate how the interactivity of the touch screen affects children's ability to connect the symbols on the screen to the real world. Given the interactive nature of the touch screen, researchers and educators should consider both the affordances of the touch screen as well as young children's cognitive abilities when assessing whether young children can learn from it as a symbolic medium.

  18. Using Sencha touch to build a mobile website

    CERN Document Server

    David, Matthew

    2012-01-01

    Sencha Touch, an open source tool, fills the space between the HTML and the native app. Web apps are generally built using JavaScript but this short ebook shows you how to construct your mobile Web sites using Sencha Touch - you just need to be familiar with Javascript. Sencha Touch targets specific devices, namely iOS, Android 2.1+ and Blackberry 6 devices. Web Apps are a critical element of the future of mobile developmen find out how to easily construct them with this brief intro to Sencha Touch

  19. Fenomenológia dotyku (Phenomenology of Touching

    Directory of Open Access Journals (Sweden)

    Petra Hroncov��

    2009-06-01

    Full Text Available Our culture seems to be visual. Maybe in knowledge… But, it is the fact that we always touch objects, other persons, ourselves. Every moment of our life is tactile. In the following article we shall ask about a touching, how we know it in common, and how we live it. We will try to delimitate some different kinds of tactile perception, which is also a part of our life. We want to point out that grasping is only one of the modalities of touching. This work is searching for a closer, temperamental touching.

  20. To touch the science through the experiment!

    Science.gov (United States)

    Słowik, Grzegorz

    2016-04-01

    To touch the science through the experiment! Grzegorz P. Slowik, Gymnasium No. 2 in Zielona Gora, Poland Our School - Gymnasium No. 2 in Zielona Gora - where pupils' age is 13 -16, has for many years organized a lot of exciting events popularizing science among Zielona Gora children and young people, in particular experimental physics and astronomy. The best known in our town is the regular event on physics, - called the physical Festival of Zielona Gora, of which I am the main initiator and organizer. The Festival is directed to students of the last classes of Zielona Góra primary schools. During the Festivities their shows have also physicists and astronomers, from cooperating with us in popularization of science Zielona Gora University. At the festival the students from our Experimental School Group "Archimedes". Presented their own prepared themselves physical experience. With considerable help of students of Gymnasium No. 2 interested in astronomy, we organize the cyclical event, named "Cosmic Santa Claus," where I share with the students the knowledge gained through my active annual participation in the Space Workshop organized by the Science Centre in Warsaw. We all have fun and learn in a great way and with a smile, we touch real science that reveals its secrets!

  1. Touching Syllable Segmentation using Split Profile Algorithm

    Directory of Open Access Journals (Sweden)

    L.Pratap Reddy

    2010-05-01

    Full Text Available The most challenging task of a character recognition system is associated with segmentation of individual components of the script with maximum efficiency. This process is relatively easy with regard to stroke based and standard scripts. Cursive scripts are more complex possessing a large number of overlapping and touching objects, where in the statistical behavior of the topological properties are to be studied extensively for achieving highest accuracy. Certain amount of similarity exists between unconstrained hand written text as well as South Indian scripts in terms of topology, component combinations, overlapping and merging characteristics. The concept of syllables and their formulations is an additive complexity with regard to Indian scripts. In this paper the statistical behavior of the cursive script, Telugu, is presented. The topological properties in terms of zones, component combinations, behavioural aspects of syllables are studied and adopted in the segmentation process. The statistical behaviour of cursive components are evaluated. Split Profile Algorithm is proposed while handling touching components. The proposed algorithm is evaluated on different fonts and sizes. The performance of the proposed algorithm is compared with two approaches methods viz aspect ratio and syllable width approaches.

  2. Thigmo Responses: The Fungal Sense of Touch.

    Science.gov (United States)

    Almeida, Mariana Cruz; Brand, Alexandra C

    2017-04-01

    The growth and development of most fungi take place on a two-dimensional surface or within a three-dimensional matrix. The fungal sense of touch is therefore critical for fungi in the interpretation of their environment and often signals the switch to a new developmental state. Contact sensing, or thigmo-based responses, include thigmo differentiation, such as the induction of invasion structures by plant pathogens in response to topography; thigmonasty, where contact with a motile prey rapidly triggers its capture; and thigmotropism, where the direction of hyphal growth is guided by physical features in the environment. Like plants and some bacteria, fungi grow as walled cells. Despite the well-demonstrated importance of thigmo responses in numerous stages of fungal growth and development, it is not known how fungal cells sense contact through the relatively rigid structure of the cell wall. However, while sensing mechanisms at the molecular level are not entirely understood, the downstream signaling pathways that are activated by contact sensing are being elucidated. In the majority of cases, the response to contact is complemented by chemical cues and both are required, either sequentially or simultaneously, to elicit normal developmental responses. The importance of a sense of touch in the lifestyles and development of diverse fungi is highlighted in this review, and the candidate molecular mechanisms that may be involved in fungal contact sensing are discussed.

  3. Physiological Effects of Touching Coated Wood

    Directory of Open Access Journals (Sweden)

    Harumi Ikei

    2017-07-01

    Full Text Available This study examined the physiological effects of touching wood with various coating with the palm of the hand on brain activity and autonomic nervous activity. Participants were 18 female university students (mean age, 21.7 ± 1.6 years. As an indicator of brain activity, oxyhemoglobin concentrations were measured in the left and right prefrontal cortices using near-infrared time-resolved spectroscopy. Heart rate variability (HRV and heart rate were used as indicators of autonomic nervous activity. The high-frequency (HF component of HRV, which reflects parasympathetic nervous activity, and the low-frequency (LF/HF ratio, which reflects sympathetic nervous activity, were measured. Plates of uncoated, oil-finished, vitreous-finished, urethane-finished, and mirror-finished white oak wood were used as tactile stimuli. After sitting at rest with their eyes closed for 60 s, participants touched the stimuli with their palm for 90 s each. The results indicated that tactile stimulation with uncoated wood calmed prefrontal cortex activity (vs. urethane finish and mirror finish, increased parasympathetic nervous activity (vs. vitreous finish, urethane finish, and mirror finish, and decreased heart rate (vs. mirror finish, demonstrating a physiological relaxation effect. Further, tactile stimulation with oil- and vitreous-finished wood calmed left prefrontal cortex activity and decreased heart rate relative to mirror-finished wood.

  4. 声触诊组织定量技术评估兔慢性肾病肾纤维化的实验研究%Renal Fibrosis Assessment in Rabbits with Chronic Renal Nephropathy Using Virtual Touch Tissue Quantiifcation Technique:Experimental Study

    Institute of Scientific and Technical Information of China (English)

    陆敏; 杜联芳; 王迎春; 徐荣

    2014-01-01

    目的:建立新西兰兔慢性肾病模型,应用声触诊组织定量(VTQ)技术监测兔慢性肾病的发展,为VTQ评估慢性肾病肾纤维化提供实验依据。材料与方法选取38只健康新西兰大白兔,其中32只每天经耳缘静脉注射阳离子牛血清白蛋白(C-BSA)诱导慢性肾病模型,另外6只未注射C-BSA设为对照组。于0周、2周、4周、6周、8周采用VTQ测量兔肾皮质硬度,随后解剖兔,评估肾脏的病理变化,并分析VTQ参数与病理参数的相关性。结果兔肾皮质0周、2周、4周、6周、8周的VTQ值分别为(1.68±0.25)m/s、(1.70±0.31)m/s、(1.87±0.35)m/s、(2.19±0.31)m/s、(2.46±0.46)m/s,6周VTQ值与4周比较差异有统计学意义(P<0.05),8周VTQ值与4周、6周比较差异有统计学意义(P<0.05)。4周、6周、8周肾小球硬化指数分别为0.81±0.40、1.43±0.46、2.15±0.46,肾间质胶原纤维面积分别为(14.29±4.62)%、(26.28±11.06)%、(42.37±10.09)%,均明显高于0周、2周,且纤维化随病程进展逐渐增高,差异有统计学意义(P<0.05)。肾皮质VTQ与肾小球硬化指数、肾间质胶原纤维面积呈正相关(r=0.663、0.652, P<0.05)。结论VTQ可以检测到兔慢性肾病发展过程中肾皮质硬度增高,与肾纤维化呈正相关,提示VTQ可以成为评价肾纤维化的重要方法。%Purpose Chronic nephropathy model was established with New Zealand rabbit, and the development of chronic nephropathy was monitored using virtual touch tissue quantification (VTQ) technique, to provide the experimental basis for chronic renal fibrosis assessment using VTQ technique. Materials and Methods Thirty-eight healthy New Zealand white rabbits were selected, of which 32 were induced into chronic nephropathy model with daily intravenous ear vein injection of cationic bovine serum albumin (C-BSA), with the other 6 rabbits without C-BSA injection as control

  5. Joint positioning sense, perceived force level and two-point discrimination tests of young and active elderly adults

    Directory of Open Access Journals (Sweden)

    Priscila G. Franco

    2015-08-01

    Full Text Available Background: Changes in the proprioceptive system are associated with aging. Proprioception is important to maintaining and/or recovering balance and to reducing the risk of falls.Objective:To compare the performance of young and active elderly adults in three proprioceptive tests.Method:Twenty-one active elderly participants (66.9±5.5 years and 21 healthy young participants (24.6±3.9 years were evaluated in the following tests: perception of position of the ankle and hip joints, perceived force level of the ankle joint, and two-point discrimination of the sole of the foot.Results:No differences (p>0.05 were found between groups for the joint position and perceived force level. On the other hand, the elderly participants showed lower sensitivity in the two-point discrimination (higher threshold when compared to the young participants (p < 0.01.Conclusion:Except for the cutaneous plantar sensitivity, the active elderly participants had maintained proprioception. Their physical activity status may explain similarities between groups for the joint position sense and perceived force level, however it may not be sufficient to prevent sensory degeneration with aging.

  6. Exact two-point resistance, and the simple random walk on the complete graph minus N edges

    Energy Technology Data Exchange (ETDEWEB)

    Chair, Noureddine, E-mail: n.chair@ju.edu.jo

    2012-12-15

    An analytical approach is developed to obtain the exact expressions for the two-point resistance and the total effective resistance of the complete graph minus N edges of the opposite vertices. These expressions are written in terms of certain numbers that we introduce, which we call the Bejaia and the Pisa numbers; these numbers are the natural generalizations of the bisected Fibonacci and Lucas numbers. The correspondence between random walks and the resistor networks is then used to obtain the exact expressions for the first passage and mean first passage times on this graph. - Highlights: Black-Right-Pointing-Pointer We obtain exact formulas for the two-point resistance of the complete graph minus N edges. Black-Right-Pointing-Pointer We obtain also the total effective resistance of this graph. Black-Right-Pointing-Pointer We modified Schwatt's formula on trigonometrical power sum to suit our computations. Black-Right-Pointing-Pointer We introduced the generalized bisected Fibonacci and Lucas numbers: the Bejaia and the Pisa numbers. Black-Right-Pointing-Pointer The first passage and mean first passage times of the random walks have exact expressions.

  7. The covariant and infrared-free graviton two-point function in de Sitter space-time

    CERN Document Server

    Pejhan, Hamed

    2015-01-01

    In this paper, the two-point function of linearized gravitons on de Sitter (dS) space is presented. Technically, respecting the dS ambient space notation, the field equation is given by the coordinate-independent Casimir operators of the de Sitter group. Analogous to the quantization of the electromagnetic field in Minkowski space, the field equation admits gauge solutions. The notation allows to exhibit the formalism of Gupta-Bleuler triplets for the present field in exactly the same manner as it occurs for the electromagnetic field. In this regard, centering on the traceless part, the field solution is written as a product of a generalized polarization tensor and a minimally coupled massless scalar field. Then, admitting a de Sitter-invariant vacuum through the so-called "Krein Space Quantization", the de Sitter fully covariant two-point function is calculated. This function is interestingly free of pathological large distance behavior (infrared divergence). Moreover, the pure-trace part (conformal sector) ...

  8. Optimal Constraints on Local Primordial Non-Gaussianity from the Two-Point Statistics of Large-Scale Structure

    CERN Document Server

    Hamaus, Nico; Desjacques, Vincent

    2011-01-01

    One of the main signatures of primordial non-Gaussianity of the local type is a scale-dependent correction to the bias of large-scale structure tracers such as galaxies or clusters, whose amplitude depends on the bias of the tracers itself. The dominant source of noise in the power spectrum of the tracers is caused by sampling variance on large scales (where the non-Gaussian signal is strongest) and shot noise arising from their discrete nature. Recent work has argued that one can avoid sampling variance by comparing multiple tracers of different bias, and suppress shot noise by optimally weighting halos of different mass. Here we combine these ideas and investigate how well the signatures of non-Gaussian fluctuations in the primordial potential can be extracted from the two-point correlations of halos and dark matter. On the basis of large $N$-body simulations with local non-Gaussian initial conditions and their halo catalogs we perform a Fisher matrix analysis of the two-point statistics. Compared to the st...

  9. Gauge-invariant two-point correlator of energy density in deconfining SU(2) Yang-Mills thermodynamics

    CERN Document Server

    Keller, Jochen

    2008-01-01

    The thesis is considering aspects of SU(2) Yang-Mills thermodynamics in its deconfining high-temperature phase. We calculate the two-point correlation function of the energy density of the photon in a thermalized gas, at first in the conventional U(1) gauge theory, followed by a calculation, where the photon is identified with the massless gauge mode in deconfining SU(2) Yang-Mills thermodynamics. Apart from the fact, that this calculation is interesting from a technical point of view, we can consider several aspects of phenomenological relevance. Since we interpret the two-point correlator of energy density as a measure for the energy transfer, and thus for the electromagnetic interaction of microscopic objects, such as atoms immersed into a photon gas, we are able to give an explanation for the unexpected stability of cold, innergalactic clouds consisting of atomic hydrogen. Subsequently, we evaluate the spatial string tension in deconfining SU(2) Yang-Mills thermodynamics, which can be regarded as measure ...

  10. Original research: 'how should I touch you?': a qualitative study of attitudes on intimate touch in nursing care.

    Science.gov (United States)

    O'Lynn, Chad; Krautscheid, Lorretta

    2011-03-01

    Although touch is essential to nursing practice, few studies have investigated patients' preferences for how nurses should perform tasks involving touch, especially intimate touch involving private and sometimes anxiety-provoking areas of patients' bodies. Some studies suggest that patients have more concerns about intimate touch from male than female nurses. This study sought to elicit the attitudes of laypersons on intimate touch provided by nurses in general and male nurses in particular. A maximum-variation sample of 24 adults was selected and semistructured interviews were conducted in four focus groups. Interviews were recorded and transcribed; thematic analysis was performed. Four themes emerged from the interviews: "Communicate with me," "Give me choices," "Ask me about gender," and "Touch me professionally, not too fast and not too slow." Participants said they want to contribute to decisions about whether intimate touch is necessary, and when it is they want information from and rapport with their nurses. Participants varied in their responses to questions on the nurse's gender. They said they want a firm but not rough touch and for nurses to ensure their privacy. These findings suggest that nurses and other clinicians who provide intimate care should be more aware of patients' attitudes on touch. Further research on the patient's perspective is warranted.

  11. Effect of touch screen button size and spacing on touch characteristics of users with and without disabilities.

    Science.gov (United States)

    Sesto, Mary E; Irwin, Curtis B; Chen, Karen B; Chourasia, Amrish O; Wiegmann, Douglas A

    2012-06-01

    The aim of this study was to investigate the effect of button size and spacing on touch characteristics (forces, impulses, and dwell times) during a digit entry touch screen task. A secondary objective was to investigate the effect of disability on touch characteristics. Touch screens are common in public settings and workplaces. Although research has examined the effect of button size and spacing on performance, the effect on touch characteristics is unknown. A total of 52 participants (n = 23, fine motor control disability; n = 14, gross motor control disability; n = 15, no disability) completed a digit entry task. Button sizes varied from 10 mm to 30 mm, and button spacing was 1 mm or 3 mm. Touch characteristics were significantly affected by button size. The exerted peak forces increased 17% between the largest and the smallest buttons, whereas impulses decreased 28%. Compared with the fine motor and nondisabled groups, the gross motor group had greater impulses (98% and 167%, respectively) and dwell times (60% and 129%, respectively). Peak forces were similar for all groups. Button size but not spacing influenced touch characteristics during a digit entry task. The gross motor group had significantly greater dwell times and impulses than did the fine motor and nondisabled groups. Research on touch characteristics, in conjunction with that on user performance, can be used to guide human computer interface design strategies to improve accessibility of touch screen interfaces. Further research is needed to evaluate the effect of the exerted peak forces and impulses on user performance and fatigue.

  12. A Design Study of Direct-Touch Interaction for Exploratory 3D Scientific Visualization

    OpenAIRE

    Klein, Tijmen; Guéniat, Florimond; Pastur, Luc; Vernier, Frédéric; Isenberg, Tobias

    2012-01-01

    International audience; We present an interaction design study of several non-overlapping direct-touch interaction widgets, postures, and bi-manual techniques to support the needs of scientists who are exploring a dataset. The final interaction design supports navigation/zoom, cutting plane interaction, a drilling exploration, the placement of seed particles in 3D space, and the exploration of temporal data evolution. To ground our design, we conducted a requirements analysis and used a parti...

  13. An Empirical Study of User Experience on Touch Mice

    Science.gov (United States)

    Chou, Jyh Rong

    2016-01-01

    The touch mouse is a new type of computer mouse that provides users with a new way of touch-based environment to interact with computers. For more than a decade, user experience (UX) has grown into a core concept of human-computer interaction (HCI), describing a user's perceptions and responses that result from the use of a product in a particular…

  14. Towards Tactile Expressions of Emotion Through Mediated Touch

    NARCIS (Netherlands)

    Huisman, Gijs; Darriba Frederiks, Aduén

    In this paper we investigate the expression of emotions through mediated touch. Participants used the Tactile Sleeve for Social Touch (TaSST), a wearable sleeve that consists of a pressure sensitive input layer, and a vibration motor output layer, to record a number of expressions of discrete

  15. Analysis on the relations between piano touch and tone

    OpenAIRE

    Nie, Lai-Mei

    2010-01-01

    In piano playing, different ways of touch lead to different tones. The effects of changing forces on keys are presented by changing interaction between hammer and string. The thesis focuses on several important variables in hammer-string system and draws conclusions to the question about piano touch and tone.

  16. The Effect of Maternal Touching on Infant Social Referencing.

    Science.gov (United States)

    Feinman, Saul

    Whether maternal touching of the infant while speaking to him or her about a stranger facilitates or interferes with social referencing is investigated in this study. Thirty-three 10-month-olds received positive or neutral nonverbal messages when their mothers spoke to them about a stranger. Infants whose mothers did not touch them while speaking…

  17. Topography of social touching depends on emotional bonds between humans.

    Science.gov (United States)

    Suvilehto, Juulia T; Glerean, Enrico; Dunbar, Robin I M; Hari, Riitta; Nummenmaa, Lauri

    2015-11-10

    Nonhuman primates use social touch for maintenance and reinforcement of social structures, yet the role of social touch in human bonding in different reproductive, affiliative, and kinship-based relationships remains unresolved. Here we reveal quantified, relationship-specific maps of bodily regions where social touch is allowed in a large cross-cultural dataset (N = 1,368 from Finland, France, Italy, Russia, and the United Kingdom). Participants were shown front and back silhouettes of human bodies with a word denoting one member of their social network. They were asked to color, on separate trials, the bodily regions where each individual in their social network would be allowed to touch them. Across all tested cultures, the total bodily area where touching was allowed was linearly dependent (mean r(2) = 0.54) on the emotional bond with the toucher, but independent of when that person was last encountered. Close acquaintances and family members were touched for more reasons than less familiar individuals. The bodily area others are allowed to touch thus represented, in a parametric fashion, the strength of the relationship-specific emotional bond. We propose that the spatial patterns of human social touch reflect an important mechanism supporting the maintenance of social bonds.

  18. A Comparison of Injuries between Flag and Touch Football.

    Science.gov (United States)

    Martin, Stephen L.

    This study was designed to determine whether fewer and less serious injuries result from participation in touch football as compared with flag football. A survey was taken of 30 flag football games and 30 touch football games and the incidence of injuries was recorded on a checklist. Results of the survey suggest the following: (a) intramural or…

  19. An Empirical Study of User Experience on Touch Mice

    Science.gov (United States)

    Chou, Jyh Rong

    2016-01-01

    The touch mouse is a new type of computer mouse that provides users with a new way of touch-based environment to interact with computers. For more than a decade, user experience (UX) has grown into a core concept of human-computer interaction (HCI), describing a user's perceptions and responses that result from the use of a product in a particular…

  20. Touched by robots: effects of physical contact and proactiveness

    NARCIS (Netherlands)

    Cramer, H.; Amin, A.K.; Evers, V.; Kemper, N.

    2009-01-01

    Even though robots' physical embodiment makes it likely humans will come into physical contact with robots, the effects of touch on attitudes in human-robot interaction are still relatively unknown. This survey and video-based, experiment (N=199) investigates the effects of touch and robots interact

  1. Nonverbal Communication in Classroom Interactions: A Pedagogical Perspective of Touch

    Science.gov (United States)

    Stamatis, Panagiotis J.

    2011-01-01

    This paper begins by exploring touch as "tactile perception" dimension, which means what human hands could achieve, especially considering the important role of skin receptors. The author moves forward to a description of children's necessity for contact as well as to their touch disorders. Following descriptions further clarify these items in the…

  2. An Avionics Touch Screen based Control Display Concept

    NARCIS (Netherlands)

    Mertens, M.; Damveld, H.J.; Borst, C.

    2012-01-01

    In many cockpits, control display units (CDUs) are vital input and information devices. In order to improve the usability of these devices, Barco, in cooperation with TU-Delft, created a touch screen control unit (TSCU), consisting of a high-quality multi-touch screen. The unit fits in the standard

  3. Understanding and Creating Accessible Touch Screen Interactions for Blind People

    Science.gov (United States)

    Kane, Shaun K.

    2011-01-01

    Using touch screens presents a number of usability and accessibility challenges for blind people. Most touch screen-based user interfaces are optimized for visual interaction, and are therefore difficult or impossible to use without vision. This dissertation presents an approach to redesigning gesture-based user interfaces to enable blind people…

  4. Households Touched by Crime, 1987. Bureau of Justice Statistics Bulletin.

    Science.gov (United States)

    Rand, Michael R.; And Others

    For the year 1987, 24.4 % of American households were touched by crime. A household is considered touched by crime if during the year it was affected by a burglarly, auto theft, or household theft or if a household member was raped, robbed, or assaulted or was a victim of personal theft, no matter where the crime occurred. These offenses, which…

  5. A Simple 2-Transistor Touch or Lick Detector Circuit

    Science.gov (United States)

    Slotnick, Burton

    2009-01-01

    Contact or touch detectors in which a subject acts as a switch between two metal surfaces have proven more popular and arguably more useful for recording responses than capacitance switches, photocell detectors, and force detectors. Components for touch detectors circuits are inexpensive and, except for some special purpose designs, can be easily…

  6. Towards Tactile Expressions of Emotion Through Mediated Touch

    NARCIS (Netherlands)

    Huisman, Gijs; Darriba Frederiks, Aduén

    2013-01-01

    In this paper we investigate the expression of emotions through mediated touch. Participants used the Tactile Sleeve for Social Touch (TaSST), a wearable sleeve that consists of a pressure sensitive input layer, and a vibration motor output layer, to record a number of expressions of discrete emotio

  7. Nonverbal Communication in Classroom Interactions: A Pedagogical Perspective of Touch

    Science.gov (United States)

    Stamatis, Panagiotis J.

    2011-01-01

    This paper begins by exploring touch as "tactile perception" dimension, which means what human hands could achieve, especially considering the important role of skin receptors. The author moves forward to a description of children's necessity for contact as well as to their touch disorders. Following descriptions further clarify these items in the…

  8. The no-touch rubber hand paradigm and mirror-touch sensation: Support for the self-other theory of mirror-touch synesthesia.

    Science.gov (United States)

    White, Rebekah C; Davies, Anne M Aimola

    2015-01-01

    We thoroughly enjoyed Ward and Banissy's Discussion Paper on mirror-touch synesthesia. The authors contrast two theories for explaining this phenomenon-the Threshold Theory and their Self-Other Theory. Ward and Banissy note that the Self-Other Theory garners support from studies that have tested individuals with mirror-touch synesthesia using the rubber hand paradigm. In this Commentary, we provide further support for the Self-Other Theory by drawing on findings from control participants without mirror-touch synesthesia tested with two different no-touch rubber hand paradigms-one paradigm makes it easier while the other makes it more difficult to make the self-other distinction.

  9. A Generalized Carpenter's Rule Theorem for Self-Touching Linkages

    CERN Document Server

    Abbott, Timothy G; Gassend, Blaise

    2009-01-01

    The Carpenter's Rule Theorem states that any chain linkage in the plane can be folded continuously between any two configurations while preserving the bar lengths and without the bars crossing. However, this theorem applies only to strictly simple configurations, where bars intersect only at their common endpoints. We generalize the theorem to self-touching configurations, where bars can touch but not properly cross. At the heart of our proof is a new definition of self-touching configurations of planar linkages, based on an annotated configuration space and limits of nontouching configurations. We show that this definition is equivalent to the previously proposed definition of self-touching configurations, which is based on a combinatorial description of overlapping features. Using our new definition, we prove the generalized Carpenter's Rule Theorem using a topological argument. We believe that our topological methodology provides a powerful tool for manipulating many kinds of self-touching objects, such as...

  10. Intrinsic alignments of galaxies in the MassiveBlack-II simulation: analysis of two-point statistics

    CERN Document Server

    Tenneti, Ananth; Mandelbaum, Rachel; Di Matteo, Tiziana; Feng, Yu; Khandai, Nishikanta

    2014-01-01

    The intrinsic alignment of galaxies with the large-scale density field is an important astrophysical contaminant in upcoming weak lensing surveys whilst offering insights into galaxy formation and evolution. We present detailed measurements of the galaxy intrinsic alignments and associated ellipticity-direction (ED) and projected shape ($w_{g+}$) correlation functions for galaxies in the cosmological hydrodynamic MassiveBlack-II (MB-II) simulation. We carefully assess the effects on galaxy shapes, misalignments and two-point statistics of iterative weighted (by mass, luminosity, and color) definitions of the (reduced and unreduced) inertia tensor. We find that iterative procedures must be adopted for a reliable measurement of reduced tensor but that luminosity versus mass weighting has only negligible effects. Blue galaxies exhibit stronger misalignments and suppressed $w_{g+}$ amplitude. Both ED and $w_{g+}$ correlations increase in amplitude with subhalo mass (in the range of $10^{10} - 6.0\\times 10^{14}h^{...

  11. New Approach for Solving a Class of Doubly Singular Two-Point Boundary Value Problems Using Adomian Decomposition Method

    Directory of Open Access Journals (Sweden)

    Randhir Singh

    2012-01-01

    Full Text Available We propose two new modified recursive schemes for solving a class of doubly singular two-point boundary value problems. These schemes are based on Adomian decomposition method (ADM and new proposed integral operators. We use all the boundary conditions to derive an integral equation before establishing the recursive schemes for the solution components. Thus we develop recursive schemes without any undetermined coefficients while computing successive solution components, whereas several previous recursive schemes have done so. This modification also avoids solving a sequence of nonlinear algebraic or transcendental equations for the undetermined coefficients with multiple roots, which is required to complete calculation of the solution by several earlier modified recursion schemes using the ADM. The approximate solution is computed in the form of series with easily calculable components. The effectiveness of the proposed approach is tested by considering four examples and results are compared with previous known results.

  12. The influence of age on pressure perception of static and moving two-point discrimination in normal subjects.

    Science.gov (United States)

    Kaneko, Atsushi; Asai, Noriyoshi; Kanda, Tadashi

    2005-01-01

    The purpose of the present study was to determine the effect of age on digital pressure perception as measured by two-point discrimination (2PD) testing. The subjects were 177 normal volunteers ranging in age from 20 to 79 years. Perceptible pressure of static and moving 2PD was measured on the index finger and little finger, using the Pressure-specifying Sensory Device. The threshold of pressure perception increased significantly with advancing age in both static and moving 2PD tests. There was a marked increase in subjects older than 60 years. Pressure perception was significantly higher for static 2PD than for moving 2PD in subjects 70-79 years of age. The threshold of pressure perception for static and moving 2PD gradually increased with advancing age, and was markedly elevated in subjects older than 60 years.

  13. Transforming activity of the c-Ha-ras oncogene having two point mutations in codons 12 and 61.

    Science.gov (United States)

    Sekiya, T; Prassolov, V S; Fushimi, M; Nishimura, S

    1985-09-01

    A recombinant plasmid carrying the human c-Ha-ras gene with two point mutations in codons 12 and 61 was constructed and its transforming activity on mouse NIH 3T3 cells was compared with those of genes with a single mutation in either codon 12 or 61. Quantitative analyses revealed that the gene with two mutations had essentially the same transforming activity as the genes with single mutations. These results indicate that a single mutation of the c-Ha-ras gene in either codon 12 or 61 is sufficient to activate the gene and that neither of the two mutation sites involved in activation of the gene needs to be intact for transforming activity.

  14. The value of virtual touch tissue image (VTI) and virtual touch tissue quantification (VTQ) in the differential diagnosis of thyroid nodules

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Feng-Juan, E-mail: 148126008@qq.com; Han, Ruo-Ling, E-mail: 13832191660@163.com; Zhao, Xin-Ming, E-mail: 18531117263@163.com

    2014-11-15

    Highlights: • All nodules in the research were confirmed by histopathology. • The classification method of VTI was easy to learn. • VTQ could provide quantitative elasticity measurements for thyroid nodules. • VTI classification could provide semi-quantitative elasticity analysis. • The area ratio could show invasive extent of malignant tumor. - Abstract: Objectives: To explore the value of virtual touch tissue image (VTI) and virtual touch tissue quantification (VTQ) in the differential diagnosis of thyroid nodules. Methods: One-hundred and seven patients with 113 thyroid nodules were performed conventional ultrasound and acoustic radiation force impulse (ARFI) elastography. The stiffness of the nodules on virtual touch tissue image (VTI) was graded, and the area ratios (AR) of nodules on VTI images versus on B-mode images were calculated. Shear wave velocity (SWV) within the thyroid nodules were measured using virtual touch tissue quantification (VTQ) technique. The pathological diagnosis as the gold standard draws the receiver-operating characteristic curve (ROC) to find the cut-off point of VTI grades, AR and SWV to predict thyroid cancer. Results: The difference in VTI grades of malignant and benign nodules was statistically significant (P < 0.05), as well as in AR and SWV. There was no significant difference in the AR of nodules or the SWV of nodules in benign group or in malignant group. The sensitivity, specificity, accuracy, positive predictive value (PPV), and negative predictive value (NPV) of VTI grades, AR, and SWV in the differential diagnosis of thyroid nodules were calculated. There was no significant difference in diagnostic accuracy among the three methods. Conclusion: VTI grades, AR of nodules on VTI images versus on B-mode images and SWV within the nodules can help the differential diagnosis of thyroid nodules.

  15. Design of a wearable research tool for warm mediated social touches

    NARCIS (Netherlands)

    Pfab, Isabel; Willemse, Christian J.A.M.

    2015-01-01

    Social touches are essential in interpersonal communication, for instance to show affect. Despite this importance, mediated interpersonal communication oftentimes lacks the possibility to touch. A human touch is a complex composition of several physical qualities and parameters, but different haptic

  16. Touching Hearts, Touching Minds: Using Emotion-Based Messaging to Promote Healthful Behavior in the Massachusetts WIC Program

    Science.gov (United States)

    Colchamiro, Rachel; Ghiringhelli, Kara; Hause, Judith

    2010-01-01

    The "Touching Hearts, Touching Minds" initiative was funded through a 2003 United States Department of Agriculture Special Projects grant to revitalize nutrition education and services in the Massachusetts Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) Program. The 30 nutrition education materials and…

  17. A Touch of Reinforcement: The Effects of Contingent Teacher Touch on the Classroom Behaviour of Young Children.

    Science.gov (United States)

    Wheldall, Kevin; And Others

    1986-01-01

    Two studies are reported in which the behaviors of four infant class teachers in England and their respective classes were observed and recorded. The aim of the studies was to examine the effects of contingent teacher touch behavior upon children's classroom behavior. Touch was found to increase on-task behavior and decrease disruptive behavior.…

  18. Performance and touch characteristics of disabled and non-disabled participants during a reciprocal tapping task using touch screen technology.

    Science.gov (United States)

    Irwin, Curt B; Sesto, Mary E

    2012-11-01

    Touch screens are becoming more prevalent in everyday environments. Therefore, it is important that this technology is accessible to those with varying disabilities. The objective of the current study was to evaluate performance and touch characteristics (forces, impulses, and dwell times) of individuals with and without a movement disorder during a reciprocal tapping touch screen task. Thirty-seven participants with a motor control disability and 15 non-disabled participants participated. Outcome measures include number of correct taps, dwell time, exerted force, and impulse. Results indicate non-disabled participants had 1.8 more taps than participants with fine motor control disabilities and 2.8 times more than those with gross motor impairments (ptouch characteristics exist between those with and without motor control disabilities. Understanding how people (including those with disabilities) interact with touch screens may allow designers and engineers to ultimately improve usability of touch screen technology.

  19. Clinical Holistic Medicine: Classic Art of Healingor the Therapeutic Touch

    Directory of Open Access Journals (Sweden)

    Søren Ventegodt

    2004-01-01

    Full Text Available Touching is often a forgotten part of medicine. The manual medicine or therapeutic touch (TT is much more powerful than many modern, biomedically oriented physicians think. Pain and discomfort can be alleviated just by touching the sick area and in this way help the patient to be in better contact with the tissue and organs of their body. Lack of presence in the body seems to be connected with many symptoms that can be readily reversed simply by sensitive touch. When touch is combined with therapeutic work on mind and feelings, holistic healing seems to be facilitated and many problems can be solved in a direct and easy way in the clinic without drugs. This paper gives examples of the strength of manual medicine or therapeutic touch in its most simple form, and points to the power of physical contact between physician and his patient in the context of the theory and practice of holistic healing. Intimacy seems highly beneficial for the process of healing and it is very important to distinguish clearly between intimacy and sexuality for the physician and his patent to be able to give and receive touch without fear and without holding back emotionally.

  20. Pleasant human touch is represented in pregenual anterior cingulate cortex.

    Science.gov (United States)

    Lindgren, Lenita; Westling, Göran; Brulin, Christine; Lehtipalo, Stefan; Andersson, Micael; Nyberg, Lars

    2012-02-15

    Touch massage (TM) is a form of pleasant touch stimulation used as treatment in clinical settings and found to improve well-being and decrease anxiety, stress, and pain. Emotional responses reported during and after TM have been studied, but the underlying mechanisms are still largely unexplored. In this study, we used functional magnetic resonance (fMRI) to test the hypothesis that the combination of human touch (i.e. skin-to-skin contact) with movement is eliciting a specific response in brain areas coding for pleasant sensations. The design included four different touch conditions; human touch with or without movement and rubber glove with or without movement. Force (2.5 N) and velocity (1.5 cm/s) were held constant across conditions. The pleasantness of the four different touch stimulations was rated on a visual analog scale (VAS-scale) and human touch was rated as most pleasant, particularly in combination with movement. The fMRI results revealed that TM stimulation most strongly activated the pregenual anterior cingulate cortex (pgACC). These results are consistent with findings showing pgACC activation during various rewarding pleasant stimulations. This area is also known to be activated by both opioid analgesia and placebo. Together with these prior results, our finding furthers the understanding of the basis for positive TM treatment effects.

  1. Touching for attention: How flight instructors support a pilot wearing a view-limiting device

    DEFF Research Database (Denmark)

    Nevile, Maurice Richard; Tuccio, William A.

    2017-01-01

    demonstrates a technique for controlling descent. The data examples are taken from a corpus of almost 100 hours of video recordings of actual in-flight instruction. We consider how our analyses can inform flight instructor training and improve instructor effectiveness, for example by revealing possible......We use video recordings from pilot training flights to show how instructors support attention of a student wearing ‘foggles’, a view-limiting device designed to train pilots to fly by reference only to the cockpit flight instruments. The instructors touch cockpit displays with a pointing finger......, what we call ‘touch-pointing’, in close collaboration with their emerging talk, and so make visibly salient relevant parts of the instrument panel for the flight activities being instructed. We examine two examples. In the first, instructor assigns student a navigational task. In the second, instructor...

  2. Implementation of spatial touch system using time-of-flight camera

    Institute of Scientific and Technical Information of China (English)

    AHN Yang-Keun; PARK Young-Choong; CHOI Kwang-Soon; PARK Woo-Choo; SEO Hae-Moon; JUNG Kwang-Mo

    2009-01-01

    Recently developed time-of-flight principle based depth-sensing video camera technologies provide precise per-pixel range data in addition to color video. Such cameras will find application in robotics and vision-based human computer interaction scenarios such as games and gesture input systems. Time-of-flight principle range cameras are becoming more and more available. They promise to make the 3D reconstruction of scenes easier, avoiding the practical issues resulting from 3D imaging techniques based on triangulation or disparity estimation. A spatial touch system was presented which uses a depth-sensing camera to touch spatial objects and details on its implementation, and how this technology will enable new spatial interactions was speculated.

  3. Empathy Predicts an Experimental Pain Reduction During Touch.

    Science.gov (United States)

    Goldstein, Pavel; Shamay-Tsoory, Simone G; Yellinek, Shahar; Weissman-Fogel, Irit

    2016-10-01

    Previous studies have provided evidence for pain-alleviating effects of segmental tactile stimulation, yet the effect of social touch and its underlying mechanism is still unexplored. Considering that the soma affects the way we think, feel, and interact with others, it has been proposed that touch may communicate emotions, including empathy, interacting with the identity of the toucher. Thus, the goal of the current study was to examine the analgesic effects of social touch, and to test the moderating role of the toucher's empathy in analgesia using an ecological paradigm. Tonic heat stimuli were administered to women. Concurrently, their partners either watched or touched their hands, a stranger touched their hands, or no one interacted with them. The results revealed diminished levels of pain during partners' touch compared with all other control conditions. Furthermore, taking into account the dyadic interaction, only during the touch condition we found 1) a significant relationship between the partners' pain ratings, and 2) a significant negative relationship between the male touchers' empathy and the pain experience of their female partners. The findings highlight the powerful analgesic effect of social touch and suggest that empathy between romantic partners may explain the pain-alleviating effects of social touch. Pain research mostly concentrates on different factors around a single pain target, without taking into account various social interactions with the observers. Our findings support the idea that pain perception models should be extended, taking into account some psychological characteristics of observers. Our conclusions are on the basis of advanced statistical methods. Copyright © 2016 American Pain Society. Published by Elsevier Inc. All rights reserved.

  4. Force and touch make video games 'serious' for dexterity rehabilitation.

    Science.gov (United States)

    Confalonieri, Michele; Guandalini, Giovanni; Da Lio, Mauro; De Cecco, Mariolino

    2012-01-01

    Computerized interfaces are able to represent 3D immersive simulations. Most of them make use of joystick, mouse, gloves, or grasp pressure transducers. Those have the drawback of 'filtering' the user interaction and/or de-locate the touch with respect to the visual stimulus. To overcome this we developed dexterity rehabilitation games on a novel touch interface that measures also force. The system allows dexterity training through 'direct' manipulation of virtual objects in 3D. Two dimensions via the touch screen, the third by the force channel. Tactile feedback is provided with a vibration device mounted on the screen back.

  5. Utilization of touch preparations and whole genome amplification for loss of heterozygosity analysis in prostate cancer

    Energy Technology Data Exchange (ETDEWEB)

    Wick, M.J.; Halling, K.; Thibodeau, S.N. [Mayo Clinic and Foundation, Rochester, MN (United States)

    1994-09-01

    Loss of heterozygosity (LOH) analyses have been used extensively to identify tumor suppressor genes in a variety of tumor systems. In an effort to localize such genes in prostate cancer, we have examined tissue for LOH with the use of PCR-based assays for a variety of microsatellites. However, the highly infiltrative nature of prostate carcinoma makes it virtually impossible, by conventional methods, to obtain tumor DNA that is uncontaminated with DNA from normal cells. Thus, we have examined the use of touch preparations as a means to increase the percentage of tumor DNA for our LOH analyses. This method, which involves lightly touching the cut surface of fresh prostate tissue to the surface of a microscope slide, allows for selection of tumor cell clusters. DNA from these cells can then be used in a variety of PCR-based assays. In this study, we demonstrate that tumor cell clusters can be used effectively for LOH analysis. Our studies also demonstrate that use of the touch preparation technique reduces or eliminates normal cell contamination. However, the small quantity of DNA in these clusters prohibits analysis at multiple loci. Therefore, we have examined whole genome amplification (WGA) of tumor cells clusters as a method of avoiding this difficulty. Random 15 base oligonucleotides were used as primers for WGA of cell cluster DNA. Aliquots of the WGA were then subjected to a second round of PCR in which microsatellite markers demonstrating allelic loss in prostate cancer were amplified. Our studies indicate that analysis of limited quantities of prostate tumor DNA at multiple loci can be accomplished through coupling of the touch preparation technique with WGA. This method may have ramifications for the analysis of tissue in which procurement of sufficient quantities of DNA is difficult.

  6. No-Touch Pancreatectomy for Invasive Ductal Carcinoma of the Pancreas

    Directory of Open Access Journals (Sweden)

    Masahiko Hirota

    2014-05-01

    Full Text Available Background Pancreatectomy is the only effective treatment for cancers of the pancreas. Surgeons usually grasp tumors duringpancreatectomy, however, this procedure may increase the risk of squeezing and shedding of the cancer cells into the portal vein, retroperitoneum, and/or peritoneal cavity. In an effort to overcome these problems, we have developed surgical techniques for no-touch pancreatectomy. Methods From April 2008 through September 2013, 52 patients have been operated on no-touch pancreatectomy for invasive ductal carcinoma of the pancreas by a single operator (M.H.. Among them, 40 received pancreatoduodenectomy (PD, and 12 did distal pancreatectomy (DP. Twenty two cases (42% required SMV-PV resection. This is a study to see if pancreatectomy can be technically done using a no-touch surgical technique without deteriorating the post-operative prognosis. During the procedure, the pancreatic tumor is neither grasped nor squeezed by the surgeon. Furthermore, for improved dissection of the retroperitoneal tissue (leftward and posterior margins for PD and rightward and posterior margins for DP, we use a hanging and clamping maneuver and dissection behind Gerota fascia. Results Overall 2- and 5-year survival rates were 64 and 42% with mean follow-up periods of 34.4 months (range: 6-68 months. Recurrence free 2- and 5-year survival rates were 49 and 31%, respectively. The 5-year survival rates of patients with JPS-stage ? andthose with JPS-stage ? were 57 and 20%, respectively. The 5-year survival rates of patients with UICC-stage ?A and those with UICCstage ?B were 49 and 39%, respectively. Patients with UICC-stage ? or ? did not survive for more than 2 years. Conclusions No-touch pancreatectomy has many theoretic advantages that merit further investigation in future randomized controlled trials.

  7. Investigation of a 2D two-point maximum entropy regularization method for signal-to-noise ratio enhancement: application to CT polymer gel dosimetry

    Energy Technology Data Exchange (ETDEWEB)

    Jirasek, A [Department of Physics and Astronomy, University of Victoria, Victoria BC V8W 3P6 (Canada); Matthews, Q [Department of Physics and Astronomy, University of Victoria, Victoria BC V8W 3P6 (Canada); Hilts, M [Medical Physics, BC Cancer Agency-Vancouver Island Centre, Victoria BC V8R 6V5 (Canada); Schulze, G [Michael Smith Laboratories, University of British Columbia, Vancouver BC V6T 1Z4 (Canada); Blades, M W [Department of Chemistry, University of British Columbia, Vancouver BC V6T 1Z1 (Canada); Turner, R F B [Michael Smith Laboratories, University of British Columbia, Vancouver BC V6T 1Z4 (Canada); Department of Chemistry, University of British Columbia, Vancouver BC V6T 1Z1 (Canada); Department of Electrical and Computer Engineering, University of British Columbia, Vancouver BC V6T 1Z4 (Canada)

    2006-05-21

    This study presents a new method of image signal-to-noise ratio (SNR) enhancement by utilizing a newly developed 2D two-point maximum entropy regularization method (TPMEM). When utilized as an image filter, it is shown that 2D TPMEM offers unsurpassed flexibility in its ability to balance the complementary requirements of image smoothness and fidelity. The technique is evaluated for use in the enhancement of x-ray computed tomography (CT) images of irradiated polymer gels used in radiation dosimetry. We utilize a range of statistical parameters (e.g. root-mean square error, correlation coefficient, error histograms, Fourier data) to characterize the performance of TPMEM applied to a series of synthetic images of varying initial SNR. These images are designed to mimic a range of dose intensity patterns that would occur in x-ray CT polymer gel radiation dosimetry. Analysis is extended to a CT image of a polymer gel dosimeter irradiated with a stereotactic radiation therapy dose distribution. Results indicate that TPMEM performs strikingly well on radiation dosimetry data, significantly enhancing the SNR of noise-corrupted images (SNR enhancement factors >15 are possible) while minimally distorting the original image detail (as shown by the error histograms and Fourier data). It is also noted that application of this new TPMEM filter is not restricted exclusively to x-ray CT polymer gel dosimetry image data but can in future be extended to a wide range of radiation dosimetry data.

  8. Investigation of a 2D two-point maximum entropy regularization method for signal-to-noise ratio enhancement: application to CT polymer gel dosimetry.

    Science.gov (United States)

    Jirasek, A; Matthews, Q; Hilts, M; Schulze, G; Blades, M W; Turner, R F B

    2006-05-21

    This study presents a new method of image signal-to-noise ratio (SNR) enhancement by utilizing a newly developed 2D two-point maximum entropy regularization method (TPMEM). When utilized as an image filter, it is shown that 2D TPMEM offers unsurpassed flexibility in its ability to balance the complementary requirements of image smoothness and fidelity. The technique is evaluated for use in the enhancement of x-ray computed tomography (CT) images of irradiated polymer gels used in radiation dosimetry. We utilize a range of statistical parameters (e.g. root-mean square error, correlation coefficient, error histograms, Fourier data) to characterize the performance of TPMEM applied to a series of synthetic images of varying initial SNR. These images are designed to mimic a range of dose intensity patterns that would occur in x-ray CT polymer gel radiation dosimetry. Analysis is extended to a CT image of a polymer gel dosimeter irradiated with a stereotactic radiation therapy dose distribution. Results indicate that TPMEM performs strikingly well on radiation dosimetry data, significantly enhancing the SNR of noise-corrupted images (SNR enhancement factors >15 are possible) while minimally distorting the original image detail (as shown by the error histograms and Fourier data). It is also noted that application of this new TPMEM filter is not restricted exclusively to x-ray CT polymer gel dosimetry image data but can in future be extended to a wide range of radiation dosimetry data.

  9. Assessment of styling performance in hair gels and hair sprays by means of a new two-point stiffness test.

    Science.gov (United States)

    Hoessel, Peter; Riemann, Solveig; Knebl, Robert; Schroeder, Jens; Schuh, Gerd; Castillo, Catalina

    2010-01-01

    A new two-point bending stiffness method on flat hair strands was developed and validated after application of hair styling gels and hair styling sprays. A special mold was used to align single hair fibers after applying the formulations to the hair. The styling gels used contain different commercially available thickeners and styling polymers, e.g., carbomer, acrylates/beheneth-25 methacrylate copolymer, Polyquaternium-86, PVP, VP/VA copolymers, and VP/methacrylamide/vinylimidazole copolymer. Evaluation of hair sprays was performed after spray application on flat hair strands. Commercially available hair styling resins were used, e.g. acrylates/t-butylacrylamide copolymer, octylacrylamide/acrylates/butylaminoethyl methacrylate copolymer, and VP/VA copolymer (30:70). The new stiffness test method provided the best correlation with practically relevant sensory assessments on hair strands and a panel test in which styling gels were evaluated. However, we did not observe a correlation between the new stiffness method on flat hair strands and practical assessments in hair spray application. We postulate that different polymer/hair composites are responsible for these discrepancies. Hairs on model heads for half-side testing are spot-welded after spray application, while hairs are seam-welded in the stiffness test after alignment of single hair fibers. This alignment is necessary to achieve reproducible results.

  10. Existence of solutions of nonlinear two-point boundary value problems for 4nth-order nonlinear differential equation

    Institute of Scientific and Technical Information of China (English)

    高永馨

    2002-01-01

    Studies the existence of solutions of nonlinear two point boundary value problems for nonlinear 4n-th-order differential equation y(4n)= f( t,y,y' ,y",… ,y(4n-1) ) (a) with the boundary conditions g2i(y(2i) (a) ,y(2i+1) (a)) = 0,h2i(y(2i) (c) ,y(2i+1) (c)) = 0, (I= 0,1,…,2n - 1 ) (b) where the functions f, gi and hi are continuous with certain monotone properties. For the boundary value problems of nonlinear nth order differential equation y(n) = f(t,y,y',y",… ,y(n-1)) many results have been given at the present time. But the existence of solutions of boundary value problem (a), (b) studied in this paper has not been covered by the above researches. Moreover, the corollary of the important theorem in this paper, I.e. Existence of solutions of the boundary value problem. Y(4n) = f(t,y,y',y",… ,y(4n-1) ) a2iy(2i) (at) + a2i+1y(2i+1) (a) = b2i ,c2iy(2O ( c ) + c2i+1y(2i+1) ( c ) = d2i, ( I = 0,1 ,…2n - 1) has not been dealt with in previous works.

  11. Differences in two-point discrimination and sensory threshold in the blind between braille and text reading: a pilot study.

    Science.gov (United States)

    Noh, Ji-Woong; Park, Byoung-Sun; Kim, Mee-Young; Lee, Lim-Kyu; Yang, Seung-Min; Lee, Won-Deok; Shin, Yong-Sub; Kang, Ji-Hye; Kim, Ju-Hyun; Lee, Jeong-Uk; Kwak, Taek-Yong; Lee, Tae-Hyun; Kim, Ju-Young; Kim, Junghwan

    2015-06-01

    [Purpose] This study investigated two-point discrimination (TPD) and the electrical sensory threshold of the blind to define the effect of using Braille on the tactile and electrical senses. [Subjects and Methods] Twenty-eight blind participants were divided equally into a text-reading and a Braille-reading group. We measured tactile sensory and electrical thresholds using the TPD method and a transcutaneous electrical nerve stimulator. [Results] The left palm TPD values were significantly different between the groups. The values of the electrical sensory threshold in the left hand, the electrical pain threshold in the left hand, and the electrical pain threshold in the right hand were significantly lower in the Braille group than in the text group. [Conclusion] These findings make it difficult to explain the difference in tactility between groups, excluding both palms. However, our data show that using Braille can enhance development of the sensory median nerve in the blind, particularly in terms of the electrical sensory and pain thresholds.

  12. The redshift-space two-point correlation functions of galaxies and groups in the Nearby Optical Galaxy sample

    CERN Document Server

    Giuricin, G; Girardi, M; Mezzetti, M; Marinoni, C; Giuricin, Giuliano; Samurovic, Srdjan; Girardi, Marisa; Mezzetti, Marino; Marinoni, Christian

    2001-01-01

    We use the two-point correlation function in redshift space, $\\xi(s)$, to study the clustering of the galaxies and groups of the Nearby Optical Galaxy (NOG) sample, which is a nearly all-sky, complete, magnitude-limited sample of $\\sim$7000 bright and nearby optical galaxies. The correlation function of galaxies is well described by a power law, $\\xi(s)=(s/s_0)^{-\\gamma}$, with slope $\\gamma\\sim1.5$ and $s_0\\sim6.4 h^{-1}$Mpc (on scales $2.7 - 12 h^{-1}$Mpc), in agreement with previous results of several redshift surveys of optical galaxies. We confirm the existence of morphological segregation between early- and late-type galaxies and, in particular, we find a gradual decreasing of the strength of clustering from the S0 galaxies to the late-type spirals, on intermediate scales. Furthermore, luminous galaxies turn out to be more clustered than dim galaxies. The luminosity segregation, which is significant for both early- and late-type objects, starts to become appreciable only for galaxies brighter than $M_B\\...

  13. Haptic Holography/Touching the Ethereal

    Science.gov (United States)

    Page, Michael

    2013-02-01

    Haptic Holography, was perhaps, first proposed by workers at MIT in the 90s. The Media Lab, headed up by Dr. Stephen Benton, with published papers by Wendy Plesiak and Ravi Pappuh. -1 Recent developments in both the technology of digital holography and haptics have made it practical to conduct further investigations. Haptic holography is auto-stereoscopic and provides co-axial viewing for the user. Haptic holography may find application in medical & surgical training and as a new form of synthetic reality for artists and designers. At OCAD's PHASE Lab (Prototypes for Holographic Art and Science Explorations) workers are exploring hybrid forms of augmented reality, that combine haptics, interactivity and auto-stereoscopic imagery. Conventional Haptic environments, while presenting a 3D physics environment, typically provide a 2D visual work/play space. Orienteering in such an environment creates an uncertain spatial relationship for the user. Our group creates 3d models from which we create holographic constructs. The same model is used to create the physics environment. The two models are super-imposed. The result: Holograms you can touch.

  14. Freezing in Touch: Sound Enhances Tactile Perception

    Directory of Open Access Journals (Sweden)

    Ya-Yeh Tsai

    2011-10-01

    Full Text Available Perceptual segregation in rapidly changing visual displays can be facilitated by a synchronized salient sound that segregates itself from other sounds in the sequence (Vroomen & de Gelder, 2000. We examined whether this “freezing” phenomenon can also be found in tactile perception. Three vibrators were placed on the participant's palm to produce four different tactile patterns. Four sounds were presented separately and simultaneously with each of the four tactile patterns. Among the three same-pitch tones, an abrupt high-pitch tone was presented simultaneously with the designated temporal position of the target pattern in the sequence of tactual stimuli that was presented rapidly and repeatedly. The task was to identify the tactile pattern of the target. Results showed that participants responded faster and more accurately with the high-pitch tone, compared to the condition when all the tones were of the same pitch. However, the result reversed when an extra tactile cue was presented on the wrist. This suggests that a salient auditory signal can improve perceptual segregation not only in vision but also in touch. That is, it is a cross-modal facilitation, not an alerting or attentional cueing effect.

  15. HTML5 mobile websites turbocharging HTML5 with jQuery, Sencha Touch, and other frameworks

    CERN Document Server

    David, Matthew

    2013-01-01

    Build HTML5-powered mobile web experiences with the aid of development frameworks that speed the development of Native App-like experiences. Build on your foundation of HTML and JavaScript with a complete understanding of the different mobile Web browser technologies. You get carefully detailed techniques that are illustrated in full color so you can leverage the Web technologies unique to each mobile browser, apply frameworks such as Sencha Touch to rapidly build out your designs, and design techniques expressly suited for tablet devices. Projects provide hands-on practice and code is prov

  16. TOUCHING GRAIN KERNELS SEPARATION BY GAP-FILLING

    Directory of Open Access Journals (Sweden)

    Matthieu Faessel

    2011-05-01

    Full Text Available Separation of touching grain kernels is a recurring problem in image analysis. Morphological methods to separatemerged objects in binary images are generally based on the watershed transformapplied to the inverse of the distance function. This method is efficient with roughly circular objects, but cannot separate objects beyond a certain elliptic shape nor when the contact zones are too numerous or too large. This paper presents a gap-filling method applied to the skeleton of the image background as an alternative technique to go further in the fused objects separation process. Open lines resulting from skeletonization are prolonged according to their direction from corresponding end points. If the distance between two lines is smaller than a certain value, their respective end points are connected. Results of combined use of watershed and gap-filling based methods are presented on sample binary images. An example of its use on an particularly complex image containing rice grains shows that it allows to segment up to 90% of the grains when classical watershed methods allow only to segment 25% of the grains. An application to breakage and cracks assessing of parboiled rice kernels is presented.

  17. System recognizing Bahamian license plate with touching characters

    Science.gov (United States)

    Dun, Jingyu; Zhang, Sanyuan; Ye, Xiuzi; Zhang, Yin

    2016-11-01

    Various methods are proposed for license plate recognition, but none of them are universal. Some common methods for license plate localization, character extraction, and recognition are analyzed. Then a system is proposed to recognize the Bahamian license plate with touching characters. A vertical edge-based method with a modified sliding window technique is used to locate the license plate, and a machine learning process is used to trim the region. The located license plate is rectified by using the minimum enclosing box and the stroke width value. Then the vertical projection and pairs of extreme points are combined to segment the characters. Finally, a deep learning method is used to recognize the characters. 2996 images are experimented on and the total recognition accuracy achieves 83.29%. Typical methods of each stage are implemented to compare with the proposed methods. In addition, the proposed system is experimented on a public dataset to show the generalization ability of the system. The experimental results show that the proposed system performs better than the other methods and is able to be used in a real-time application.

  18. The application study of the virtual touch tissue image quantification technique in the benign or malignancy diagnosis of cervical lymph nodes%定量声触诊组织成像技术在颈部淋巴结良恶性鉴别诊断中的初步研究

    Institute of Scientific and Technical Information of China (English)

    周利杰; 钟丽云; 蒋天安

    2016-01-01

    目的:探讨定量声触诊组织成像(VTIQ)技术在颈部淋巴结良恶性鉴别诊断中的应用价值。方法回顾性分析经淋巴结穿刺活检或手术病理诊断明确的84例患者共107个颈部淋巴结的常规超声及 VTIQ 测值。先行淋巴结常规超声检查,在 VTIQ 模式下测量淋巴结内部横向剪切波速度(SWV)。VTIQ 质量模式首先确定有效的 SWV 测量区域,VTIQ 速度模式下在有效的测量区域同时进行多次 SWV 测量,获取最大值、最小值、中位数及平均值。应用 ROC 曲线确定准确性最高的 SWV,获得其最佳诊断界值并评估 VTIQ 技术的诊断效能,同时进行单因素和多因素 Logistic 回归分析研究。结果107个淋巴结中包括了52个恶性病灶和55个良性病灶。单因素分析发现沙砾样钙化、SWV 平均值、淋巴结内部血供状况对淋巴结的良恶性影响差异均有统计学意义(P <0.05),多因素分析证实沙砾样钙化、SWV 平均值为其危险因素(P <0.05)。VTIQ 测量的淋巴结良性病灶 SWV 最大值、最小值、中位数及平均值分别为(2.98±0.62)m/s、(2.38±0.44)m/s、(2.60±0.51)m/s、(2.63±0.49)m/s,恶性病灶上述指标分别为(3.58±0.62)m/s、(2.97±0.48)m/s、(3.26±0.50)m/s、(3.26±0.51)m/s,差异均有统计学意义(t =-5.03、-6.60、-6.74、-6.45,P 均<0.01)。依据ROC 曲线分析,SWV 测值中以平均值的诊断效能最佳,诊断界值为2.68 m/s,其敏感性、特异性及Youden 指数分别为86.53%、78.18%、0.64。结论 VTIQ 技术采用 SWV 的平均值鉴别良恶性颈部淋巴结具有重要的应用价值。%Objective To investigate the application value of the virtual touch tissue image quantification(VTIQ) technique in the differential diagnosis of malignant and benign lymph nodes of the neck.Methods The imaging data of 107 lymph nodes in 84 patients proven by biopsy pathology or operating on conventional ultrasound and VTIQ were retrospectively analyzed.The lymph

  19. The Solution of Two-Point Boundary Value Problem of a Class of Duffing-Type Systems with Non-C1 Perturbation Term

    Directory of Open Access Journals (Sweden)

    Jiang Zhengxian

    2009-01-01

    Full Text Available This paper deals with a two-point boundary value problem of a class of Duffing-type systems with non-C1 perturbation term. Several existence and uniqueness theorems were presented.

  20. Sticky-Finger Manipulation with a Multi-Touch Interface

    Science.gov (United States)

    2011-07-01

    16 2.4.2 Simple Shape Gesture Recognition . . . . . . . . . . . . . . . . . . . . . 17 vii 2.4.3 Collision...system. Depending on the multi-touch hardware used, the area and shape of each finger that 16 Figure 2.10: Simple Rectangle Gesture Recognition : The...to the capacitive touch-screen of the Ipad, which allows us to achieve consistent and robust results. 2.4.2 Simple Shape Gesture Recognition In

  1. 告别MyIE2 TouchNet Browser

    Institute of Scientific and Technical Information of China (English)

    逆刃刀

    2004-01-01

    刚刚接解Internet的时候,只知道用微软强加给我们的IE浏览器。后来逐渐了解了,开始选择更好的MyIE2,一直和MyIE2相守走过了N个日日夜夜,直到发现了TouchNet Browser(以下简称TouchNet)。

  2. Creating iPhone Apps with Cocoa Touch

    CERN Document Server

    Hockenberry, Craig

    2010-01-01

    Creating iPhone Apps with Cocoa Touch: The Mini Missing Manual walks you through developing your first iPhone App and introduces you to your programming environments and tools: Cocoa Touch, Interface Builder, Xcode, and the Objective-C programming language. If you're a Java or C developer, this eBook is your fast track to App development. This eBook is adapted from parts of iPhone App Development: The Missing Manual.

  3. Developing Mixed Reality Educational Applications: The Virtual Touch Toolkit

    OpenAIRE

    Juan Mateu; María José Lasala; Xavier Alamán

    2015-01-01

    © 2015 by MDPI (http://www.mdpi.org). Reproduction is permitted for noncommercial purposes. In this paper, we present Virtual Touch, a toolkit that allows the development of educational activities through a mixed reality environment such that, using various tangible elements, the interconnection of a virtual world with the real world is enabled. The main goal of Virtual Touch is to facilitate the installation, configuration and programming of different types of technologies, ab...

  4. Touch Screen based Speed Control of Single Phase Induction Motor

    Directory of Open Access Journals (Sweden)

    S. Mallika

    2010-12-01

    Full Text Available This paper gives a brief idea of touch screen technology and its interfacing with a controller to control the speed of single phase induction motor. Here touch screen technology and Programmable System on Chip (PSOC microcontroller concept is utilized which is less spaceconsumption and easy to design. The aim of this paper is to have remote sensing and speed control of an AC motor.

  5. Young Children Learning from Touch Screens: Taking a Wider View

    OpenAIRE

    Silvia Lovato; Waxman, Sandra R.

    2016-01-01

    Touch screen devices such as smartphones and tablets are now ubiquitous in the lives of American children. These devices permit very young children to engage interactively in an intuitive fashion with actions as simple as touching, swiping and pinching. Yet, we know little about the role these devices play in very young children’s lives or their impact on early learning and development. Here we focus on two areas in which existing research sheds some light on these issues with children under ...

  6. The C. elegans touch response facilitates escape from predacious fungi

    OpenAIRE

    Maguire, Sean M.; Clark, Christopher M.; Nunnari, John; Pirri, Jennifer K.; Alkema, Mark J.

    2011-01-01

    Predator-prey interactions are vital determinants in the natural selection of behavioral traits. However, we have few insights into both the neural mechanisms and the selective advantage of specific behavioral traits. Gentle touch to the anterior half of the body of Caenorhabditis elegans elicits an escape response in which the animal quickly reverses and suppresses exploratory head movements [1]. Even though the C. elegans touch response has provided one of the rare examples of how neural ne...

  7. Allina Health System's approach to high tech and high touch.

    Science.gov (United States)

    Tam, T A

    1997-01-01

    All health care providers, regardless of their integration status, must meet customer expectations to maintain market share and viability. The balance between high tech and high touch customer interactions is not a fad or trend. For integrated health systems with the full continuum of medical care, additional challenges are presented by the organization's competing health care delivery and financing components. Allina Health System describes its integrated health system approach to satisfying customer high tech and high touch needs.

  8. MULTI-TOUCH TECHNOLOGY DEVELOPMENT FOR WHITEBOARD BASED ON USB HID%基于USB HID的电子白板的多点触控技术开发

    Institute of Scientific and Technical Information of China (English)

    刘森; 周祖微; 王忆文; 李辉

    2013-01-01

    For visual-based whiteboard,in this article we propose a two-point recognition algorithm which can remove the interference of the pseudo-point,and develop a USB-based multi-touch technology.In development process,the whiteboard system achieves the seamless connection with Windows 7 operating system by following the HID specification,which eliminates the need of complex system driver development and easily achieves single touch and two-point touch.The development of multi-touch technology had been validated through the experiment,and it improves the user experience of whiteboard as well.%针对基于视觉的电子白板,提出一种能去除伪点干扰的两点识别算法,并开发了基于USB的多点触控技术.在开发过程中,白板系统通过HID(Human Interface Device)规范实现了与Windows7操作系统的无缝对接,免去了复杂的系统驱动程序开发工作,简便地实现了单点和两点触控.开发的多点触控技术已经通过实验进行了验证,提升了电子白板的用户体验.

  9. Role of sex in externally motivated self-touching gestures.

    Science.gov (United States)

    Heaven, Laura; McBrayer, Dan; Prince, Bob

    2002-08-01

    Self-touching gestures can be externally induced by the verbal presentation of anxiety-inducing stimuli and the active discussion of a passage. The frequency of these self-touching gestures appears to be affected by the individual interacting with the topic, the type of discourse (listening or discussing), the type of stimulus (canaries or leeches), and the interaction between the types of discourse and stimulus. This study assessed these variables as well as the sex of the participant and the order of presentation of stimulus type, neither of which were statistically significant. Participants were read two passages, one about a topic (leeches) expected to produce anxiety and the other about a topic (canaries) not expected to do so, and asked to answer questions about the passages. The number of self-touches was counted by an observer in another room. Each participant had both types of discourse (listening and discussing) and both types of stimulus (canaries and leeches). There was no significant difference between the number of self-touches by participants with either the male or female reader. Discussion as a method of discourse was associated with a significantly greater number of self-touches than listening. The interaction between discourse type and stimulus type was also significant. The combination of the anxiety-producing stimulus and the active discourse (discussion) produced the highest average number of self-touches.

  10. Touch and temporal behavior of grand piano actions

    Science.gov (United States)

    Goebl, Werner; Bresin, Roberto; Galembo, Alexander

    2005-08-01

    This study investigated the temporal behavior of grand piano actions from different manufacturers under different touch conditions and dynamic levels. An experimental setup consisting of accelerometers and a calibrated microphone was used to capture key and hammer movements, as well as the sound signal. Five selected keys were played by pianists with two types of touch (``pressed touch'' versus ``struck touch'') over the entire dynamic range. Discrete measurements were extracted from the accelerometer data for each of the over 2300 recorded tones (e.g., finger-key, hammer-string, and key bottom contact times, maximum hammer velocity). Travel times of the hammer (from finger-key to hammer-string) as a function of maximum hammer velocity varied clearly between the two types of touch, but only slightly between pianos. A travel time approximation used in earlier work [Goebl W., (2001). J. Acoust. Soc. Am. 110, 563-572] derived from a computer-controlled piano was verified. Constant temporal behavior over type of touch and low compression properties of the parts of the action (reflected in key bottom contact times) were hypothesized to be indicators for instrumental quality.

  11. The Will to Touch: David Copperfield’s Hand

    Directory of Open Access Journals (Sweden)

    Pamela K. Gilbert

    2014-10-01

    Full Text Available In the nineteenth century, touch was considered to be a more privileged sense than has been generally noted, and the hand was pre-eminently the site of active touching. The hand comes newly to rival the face in descriptive significance in mid-nineteenth-century fiction, and reflects contemporary notions of the role of touch in the exercise of the will and the development of the sensorium. This article explores medical and philosophical understandings of embodied touch within the period, and examines why the hand emerged as a focal point for scientific, poetic, and popular discussion. Such scientists as Charles Bell, Herbert Spencer, and Alexander Bain tend to work within two paradigms: the hand as a site of sensory input that forms a conduit between inner and outer worlds, and the hand as an instrument of the will. The article explores Dickens's use of these ideas about touch and development in his 1850 'Bildungsroman', 'David Copperfield'. David struggles to establish his proper status as a middle-class male, in part by learning to use his hands to impose his own will and to resist the dominance of inappropriate others through touch.

  12. Atmospheric pressure plasma jets interacting with liquid covered tissue: touching and not-touching the liquid

    Science.gov (United States)

    Norberg, Seth A.; Tian, Wei; Johnsen, Eric; Kushner, Mark J.

    2014-11-01

    In the use of atmospheric pressure plasma jets in biological applications, the plasma-produced charged and neutral species in the plume of the jet often interact with a thin layer of liquid covering the tissue being treated. The plasma-produced reactivity must then penetrate through the liquid layer to reach the tissue. In this computational investigation, a plasma jet created by a single discharge pulse at three different voltages was directed onto a 200 µm water layer covering tissue followed by a 10 s afterglow. The magnitude of the voltage and its pulse length determined if the ionization wave producing the plasma plume reached the surface of the liquid. When the ionization wave touches the surface, significantly more charged species were created in the water layer with H3O+aq, O3-aq, and O2-aq being the dominant terminal species. More aqueous OHaq, H2O2aq, and O3aq were also formed when the plasma plume touches the surface. The single pulse examined here corresponds to a low repetition rate plasma jet where reactive species would be blown out of the volume between pulses and there is not recirculation of flow or turbulence. For these conditions, NxOy species do not accumulate in the volume. As a result, aqueous nitrites, nitrates, and peroxynitrite, and the HNO3aq and HOONOaq, which trace their origin to solvated NxOy, have low densities.

  13. Epicritic sensation in cervical spinal cord injury: diagnostic gains beyond testing light touch.

    Science.gov (United States)

    Velstra, Inge-Marie; Bolliger, Marc; Baumberger, Michael; Rietman, Johan Swanik; Curt, Armin

    2013-08-01

    Abstract Applied as a bedside test of gross dorsal column function, the testing of light touch (LT) sensation is of high clinical value in the diagnosis of human spinal cord injury (SCI). However, the assessment of overall dorsal column deficit by testing only LT may be limited, because the dorsal column pathway conveys several large diameter afferent modalities (e.g., sensation of touch, two-point discrimination, and proprioception). Therefore, the objective of this study was to compare the epicritic sensation assessed by LT, Semmes-Weinstein monofilament (SWM), and electrical perception threshold (EPT) across cervical dermatomes (C3-C8) in individuals with cervical SCI. A multicenter cross-sectional study was performed at 6 months after cervical SCI, applying combined measures of LT, SWM, and EPT, bilaterally over predefined key sensory points (C3-C8). A total of 300 left- and right-sided dermatomes were tested for each outcome measure in 25 participants. The percentage agreement between classifications according to LT and SWM/EPT testing for all dermatomes between C3 and C8 ranged from 95.5% to 36.2%. The degree of agreement showed considerably variable κ coefficients (-0.1≥kw≤0.7) for each dermatome between C3 and C8. The additional measurements of epicritic sensation by SWM and EPT increased sensitivity by detecting and quantifying differences in sensory thresholds above, at, and below the LT level of injury. This is relevant for early clinical trials (phase 1/2), in which disclosing any biological activity of an intervention may be revealed by subtle sensory changes that might gain a clinical relevance.

  14. Touch and Massage for Medically Fragile Infants

    Directory of Open Access Journals (Sweden)

    Karen Livingston

    2009-01-01

    Full Text Available Research investigating the efficacy of infant massage has largely focused on premature and low birth weight infants. The majority of investigations have neglected highly acute patients in academic neonatal intensive care units (NICUs. The current study was developed with two aims: (Phase 1 to develop, implement and demonstrate the feasibility and safety of a parent-trained compassionate touch/massage program for infants with complex medical conditions and (Phase 2 to conduct a longitudinal randomized control trial (RCT of hand containment/massage versus standard of care in a level III academic Center for Newborn and Infant Critical Care (CNICC. Certified infant massage instructors (CIMIs taught parents to massage their hospitalized infants. Massage therapy and instruction were performed for seven consecutive days and health outcomes were collected for up to 1 month following treatment. Caregivers, nurses and certified infant massage therapists indicated moderate to high levels of satisfaction and feasibility with the implementation of hand containment/massage in a level III academic center CNICC. In addition, infant behavioral and physiological measures were within safe limits during the massage sessions. All caregivers participating in the massage group reported high levels of satisfaction 7 days into the intervention and at the 1-month follow-up with regards to their relationship with their infant, the massage program's impact on that relationship and the massage program. Due to unequal and small sample sizes, between group analyses (control versus massage were not conducted. Descriptive infant characteristics of health outcomes are described. Preliminary data from this study indicates feasibility and safety of infant massage and satisfaction among the caregivers, CIMIs and the nurses in the CNICC. An important contribution from this study was the demonstration of the infants' safety based on physiological stability and no change in agitation

  15. Mirror-Touch and Ticker Tape Perceptions in Synesthesia

    Directory of Open Access Journals (Sweden)

    Charlotte Anne Chun

    2013-11-01

    Full Text Available A fundamental question in the field of synesthesia is whether it is associated with other cognitive phenomena. The current study examined synesthesia’s connections with phenomenal traits of mirror-touch and ticker tape experiences, as well as the representation of the three phenomena in the population, across gender and domain of work/study. Mirror-touch is the automatic, involuntary experience of tactile sensation on one's own body when others are being touched. For example, seeing another person’s arm being stroked can evoke physical touch sensation on one’s own arm. Ticker tape is the automatic visualization of spoken words or thoughts, such as a teleprompter. For example, when spoken to, a ticker taper might see mentally the spoken words displayed in front of his face or as coming out of the speaker’s mouth. To explore synesthesia’s associations with these phenomena, a diverse group (n=3,743 was systematically recruited from eight universities and one public museum in France to complete an online screening. Of the 1,017 eligible respondents, synesthetes (across all subtypes reported higher rates of mirror-touch and ticker tape than non-synesthetes, suggesting that synesthesia is associated with these phenomenal traits. However effect size was small and we could not rule out that response bias influenced these associations. Mirror-touch and ticker tape were independent. No differences were found across gender or domain of work and study in prevalence of synesthesia, mirror-touch or ticker tape. The prevalence of ticker tape, unknown so far, was estimated at about 7%, an intermediate rate between estimates of grapheme-color (2 to 4% and sequence-space synesthesia (9 to 14%. Within synesthesia, grapheme-personification, also called ordinal-linguistic personification was the most common subtype and was estimated around 12%. Co-occurences of the different types of synesthesia were higher than chance, though at the level of small effect

  16. Mirror-touch and ticker tape experiences in synesthesia.

    Science.gov (United States)

    Chun, Charlotte A; Hupé, Jean-Michel

    2013-01-01

    A fundamental question in the field of synesthesia is whether it is associated with other cognitive phenomena. The current study examined synesthesia's connections with phenomenal traits of mirror-touch and ticker tape experiences, as well as the representation of the three phenomena in the population, across gender and domain of work/study. Mirror-touch is the automatic, involuntary experience of tactile sensation on one's own body when others are being touched. For example, seeing another person's arm being stroked can evoke physical touch sensation on one's own arm. Ticker tape is the automatic visualization of spoken words or thoughts, such as a teleprompter. For example, when spoken to, a ticker taper might see mentally the spoken words displayed in front of his face or as coming out of the speaker's mouth. To explore synesthesia's associations with these phenomena, a diverse group (n = 3743) was systematically recruited from eight universities and one public museum in France to complete an online screening. Of the 1017 eligible respondents, synesthetes (across all subtypes) reported higher rates of mirror-touch and ticker tape than non-synesthetes, suggesting that synesthesia is associated with these phenomenal traits. However, effect sizes were small and we could not rule out that response bias influenced these associations. Mirror-touch and ticker tape were independent. No differences were found across gender or domain of work and study in prevalence of synesthesia, mirror-touch or ticker tape. The prevalence of ticker tape, unknown so far, was estimated at about 7%, an intermediate rate between estimates of grapheme-color (2-4%) and sequence-space synesthesia (9-14%). Within synesthesia, grapheme-personification, also called ordinal-linguistic personification (OLP) was the most common subtype and was estimated around 12%. Co-occurences of the different types of synesthesia were higher than chance, though at the level of small effect sizes.

  17. Investigating Maternal Touch and Infants' Self-Regulatory Behaviours during a Modified Face-to-Face Still-Face with Touch Procedure

    Science.gov (United States)

    Jean, Amélie D. L.; Stack, Dale M.; Arnold, Sharon

    2014-01-01

    Maternal touch and infants' self-regulatory behaviours were examined during a modified Still-Face with Touch (SF?+?T) procedure. Mothers and their 5½-month-old infants participated in one period of Normal interaction followed by three SF?+?T periods. Maternal functions of touch, and infants' self-regulatory behaviour, affect, and…

  18. The influence of surface finishing methods on touch-sensitive reactions

    Science.gov (United States)

    Kukhta, M. S.; Sokolov, A. P.; Krauinsh, P. Y.; Kozlova, A. D.; Bouchard, C.

    2017-02-01

    This paper describes the modern technological development trends in jewelry design. In the jewelry industry, new trends, associated with the introduction of updated non-traditional materials and finishing techniques, are appearing. The existing information-oriented society enhances the visual aesthetics of new jewelry forms, decoration techniques (depth and surface), synthesis of different materials, which, all in all, reveal a bias towards positive effects of visual design. Today, the jewelry industry includes not only traditional techniques, but also such improved techniques as computer-assisted design, 3D-prototyping and other alternatives to produce an updated level of jewelry material processing. The authors present the specific features of ornamental pattern designing, decoration types (depth and surface) and comparative analysis of different approaches in surface finishing. Identifying the appearance or the effect of jewelry is based on proposed evaluation criteria, providing an advanced visual aesthetics basis is predicated on touch-sensitive responses.

  19. [On compulsive hand-washing--psychopathology of "touching"].

    Science.gov (United States)

    Matsumoto, M

    1993-01-01

    Compulsive hand-washing has been well known to the psychiatrists, since Legrand du Saulle described this disorder by the name of "délire du toucher" (1866), which refers to mysophobia or contact-phobia. But its clinical significance seems to have been not fully examined, except from the psychoanalytical point of view, that has observed the repression of sexuality in its pathology. This report presents four cases of compulsive hand-washing, and explores why they exclusively wash their hands. In order to elucidate the reason for their hand-washing and its significance, this report aims to study the relation of following three elements; "Sexuality", "hand" and "touching". As the idioms using "hand" often represent the various modes of sexual life in Japanese language as well as in English, so the "touching by hand" is reasonably considered to evoke the sexual impulsions, which the hand-washers fear and wish to avoid. On the other hand, "touching" is, necessarily in nature, to be touched by the touched object. For example, one who touches the lover's hand is inevitably to be touched by hers. That is; one is forced to be an object of one's object, which becomes to be a subject. In this sense, the act of "touching" means to lose one's "being subject" and to melt oneself into the situation where the structural distinction of subject and object can disappear. So one's act of "touching" or vivid contact with the other can cause anxiety by means of losing one's ego, which may be also a critical point to introduce to create something new. A compulsive hand-washer fears and avoids this critical moment that can make him lose his "being subject", so he "washes his hands of (cuts off relation with)" the situation that can undermine his ego. This avoidance of having contact can be compared to "the lose of vivid contact with the reality (la perte du contact avec la réalité (Minkowski)" observed in schizophrenia. In their ways of life, many hand-washers are not less autistic than

  20. Good vibrations: Global processing can increase the pleasantness of touch.

    Science.gov (United States)

    Mirams, Laura; Poliakoff, Ellen; Zandstra, Elizabeth H; Hoeksma, Marco; Thomas, Anna; El-Deredy, Wael

    2016-12-01

    Visual-tactile carry-over effects of global/local processing (attention to the whole, versus the details) have been reported under active touch conditions. We investigated whether carry-over effects of global/local processing also occur for passive touch and whether global/local processing has differential effects on affective and discriminative aspects of touch. Participants completed two tactile tasks involving pleasantness rating and discrimination of a set of tactile vibrations before and after completing a version of the Navon task that encouraged a focus on the global (n = 30), local (n = 30), or both (n = 30) features of a series of visual stimuli. In line with previous research suggesting a link between global processing and positive emotion, global processing increased pleasantness ratings of high-frequency (but not low-frequency) tactile vibrations. Local processing did not improve the ability to discriminate between vibrations of different frequencies, however. There was some evidence of a tactile-visual carry-over effect; prior local processing of tactile vibrations reduced global precedence during the Navon task in the control group. We have shown carry-over effects of global versus local processing on passive touch perception. These findings provide further evidence suggesting that a common perceptual mechanism determines processing level across modalities and show for the first time that prior global processing affects the pleasantness of touch.

  1. Parental Reports on Touch Screen Use in Early Childhood.

    Science.gov (United States)

    Cristia, Alejandrina; Seidl, Amanda

    2015-01-01

    Touch screens are increasingly prevalent, and anecdotal evidence suggests that young children are very drawn towards them. Yet there is little data regarding how young children use them. A brief online questionnaire queried over 450 French parents of infants between the ages of 5 and 40 months on their young child's use of touch-screen technology. Parents estimated frequency of use, and further completed several checklists. Results suggest that, among respondent families, the use of touch screens is widespread in early childhood, meaning that most children have some exposure to touch screens. Among child users, certain activities are more frequently reported to be liked than others, findings that we discuss in light of current concern for children's employment of time and the cognitive effects of passive media exposure. Additionally, these parental reports point to clear developmental trends for certain types of interactive gestures. These results contribute to the investigation of touch screen use on early development and suggest a number of considerations that should help improve the design of applications geared towards toddlers, particularly for scientific purposes.

  2. Parental Reports on Touch Screen Use in Early Childhood.

    Directory of Open Access Journals (Sweden)

    Alejandrina Cristia

    Full Text Available Touch screens are increasingly prevalent, and anecdotal evidence suggests that young children are very drawn towards them. Yet there is little data regarding how young children use them. A brief online questionnaire queried over 450 French parents of infants between the ages of 5 and 40 months on their young child's use of touch-screen technology. Parents estimated frequency of use, and further completed several checklists. Results suggest that, among respondent families, the use of touch screens is widespread in early childhood, meaning that most children have some exposure to touch screens. Among child users, certain activities are more frequently reported to be liked than others, findings that we discuss in light of current concern for children's employment of time and the cognitive effects of passive media exposure. Additionally, these parental reports point to clear developmental trends for certain types of interactive gestures. These results contribute to the investigation of touch screen use on early development and suggest a number of considerations that should help improve the design of applications geared towards toddlers, particularly for scientific purposes.

  3. Design and implementation of spaceborne high resolution infrared touch screen

    Science.gov (United States)

    Li, Tai-guo; Li, Wen-xin; Dong, Yi-peng; Ma, Wen; Xia, Jia-gao

    2015-10-01

    For the consideration of the special application environment of the electronic products used in aerospace and to further more improve the human-computer interaction of the manned aerospace area. The research is based on the design and implementation way of the high resolution spaceborne infrared touch screen on the basis of FPGA and DSP frame structure. Beside the introduction of the whole structure for the high resolution spaceborne infrared touch screen system, this essay also gives the detail information about design of hardware for the high resolution spaceborne infrared touch screen system, FPGA design, GUI design and DSP algorithm design based on Lagrange interpolation. What is more, the easy makes a comprehensive research of the reliability design for the high resolution spaceborne infrared touch screen for the special purpose of it. Besides, the system test is done after installation of spaceborne infrared touch screen. The test result shows that the system is simple and reliable enough, which has a stable running environment and high resolution, which certainly can meet the special requirement of the manned aerospace instrument products.

  4. Clinical Holistic Medicine: Holistic Sexology and Treatment of Vulvodynia Through Existential Therapy and Acceptance Through Touch

    Directory of Open Access Journals (Sweden)

    Søren Ventegodt

    2004-01-01

    Full Text Available Sexual problems are found in four major forms: lack of libido, lack of arousal and potency, pain and discomfort during intercourse, and lack of orgasm. It is possible to work with a holistic approach to sexology in the clinic in order to find and repair the negative beliefs, repressions of love, and lack of purpose of life, which are the core to problems like arousal, potency, and pain with repression of gender and sexuality. It is important not to focus only on the gender and genitals in understanding the patient's sexual problems. It is of equal importance not to neglect the body, its parts, and the feelings and emotions connected to them. Shame, guilt, helplessness, fear, disgust, anger, hatred, and other strong feelings are almost always an important part of a sexual problem and these feelings are often “held” by the tissue of the pelvis and sexual organs. The patient with sexual problems can be helped both by healing existence in general and by discharging old painful emotions from the tissues. The later process of local healing is often facilitated by a simple technique: accepting contact via touch. This is a very simple technique, where the self-acceptance of the patient is to be promoted, for example, asking the female patient to put her hand on her stomach (uterus or vulva, after which the holistic physician puts his hand supportively around hers. When done with care and after obtaining the necessary trust of the patient, this aspect of holding often releases the old negative emotions of shame bound to the touched areas. Afterwards, the emotional problems become a subject for conversational therapy and further holistic processing. Primary vulvodynia seems to be one of the diseases that can be cured after only a few successful sessions of working with acceptance through touch. The technique can be used as an isolated procedure or as a part of a pelvic examination. When touching the genitals with the intention of sexual healing, a

  5. Clinical holistic medicine: holistic sexology and treatment of vulvodynia through existential therapy and acceptance through touch.

    Science.gov (United States)

    Ventegodt, Søren; Morad, Mohammed; Hyam, Eytan; Merrick, Joav

    2004-08-04

    Sexual problems are found in four major forms: lack of libido, lack of arousal and potency, pain and discomfort during intercourse, and lack of orgasm. It is possible to work with a holistic approach to sexology in the clinic in order to find and repair the negative beliefs, repressions of love, and lack of purpose of life, which are the core to problems like arousal, potency, and pain with repression of gender and sexuality. It is important not to focus only on the gender and genitals in understanding the patient"s sexual problems. It is of equal importance not to neglect the body, its parts, and the feelings and emotions connected to them. Shame, guilt, helplessness, fear, disgust, anger, hatred, and other strong feelings are almost always an important part of a sexual problem and these feelings are often "held" by the tissue of the pelvis and sexual organs. The patient with sexual problems can be helped both by healing existence in general and by discharging old painful emotions from the tissues. The later process of local healing is often facilitated by a simple technique: accepting contact via touch. This is a very simple technique, where the self-acceptance of the patient is to be promoted, for example, asking the female patient to put her hand on her stomach (uterus) or vulva, after which the holistic physician puts his hand supportively around hers. When done with care and after obtaining the necessary trust of the patient, this aspect of holding often releases the old negative emotions of shame bound to the touched areas. Afterwards, the emotional problems become a subject for conversational therapy and further holistic processing. Primary vulvodynia seems to be one of the diseases that can be cured after only a few successful sessions of working with acceptance through touch. The technique can be used as an isolated procedure or as a part of a pelvic examination. When touching the genitals with the intention of sexual healing, a written therapeutic

  6. Air-touch interaction system for integral imaging 3D display

    Science.gov (United States)

    Dong, Han Yuan; Xiang, Lee Ming; Lee, Byung Gook

    2016-07-01

    In this paper, we propose an air-touch interaction system for the tabletop type integral imaging 3D display. This system consists of the real 3D image generation system based on integral imaging technique and the interaction device using a real-time finger detection interface. In this system, we used multi-layer B-spline surface approximation to detect the fingertip and gesture easily in less than 10cm height from the screen via input the hand image. The proposed system can be used in effective human computer interaction method for the tabletop type 3D display.

  7. Enhanced Genetic Analysis of Single Human Bioparticles Recovered by Simplified Micromanipulation from Forensic ‘Touch DNA’ Evidence

    Science.gov (United States)

    Farash, Katherine; Hanson, Erin K.; Ballantyne, Jack

    2015-01-01

    DNA profiles can be obtained from ‘touch DNA’ evidence, which comprises microscopic traces of human biological material. Current methods for the recovery of trace DNA employ cotton swabs or adhesive tape to sample an area of interest. However, such a ‘blind-swabbing’ approach will co-sample cellular material from the different individuals, even if the individuals’ cells are located in geographically distinct locations on the item. Thus, some of the DNA mixtures encountered in touch DNA samples are artificially created by the swabbing itself. In some instances, a victim’s DNA may be found in significant excess thus masking any potential perpetrator’s DNA. In order to circumvent the challenges with standard recovery and analysis methods, we have developed a lower cost, ‘smart analysis’ method that results in enhanced genetic analysis of touch DNA evidence. We describe an optimized and efficient micromanipulation recovery strategy for the collection of bio-particles present in touch DNA samples, as well as an enhanced amplification strategy involving a one-step 5 µl microvolume lysis/STR amplification to permit the recovery of STR profiles from the bio-particle donor(s). The use of individual or few (i.e., “clumps”) bioparticles results in the ability to obtain single source profiles. These procedures represent alternative enhanced techniques for the isolation and analysis of single bioparticles from forensic touch DNA evidence. While not necessary in every forensic investigation, the method could be highly beneficial for the recovery of a single source perpetrator DNA profile in cases involving physical assault (e.g., strangulation) that may not be possible using standard analysis techniques. Additionally, the strategies developed here offer an opportunity to obtain genetic information at the single cell level from a variety of other non-forensic trace biological material. PMID:25867046

  8. Discrete Mixed Petrov-Galerkin Finite Element Method for a Fourth-Order Two-Point Boundary Value Problem

    Directory of Open Access Journals (Sweden)

    L. Jones Tarcius Doss

    2012-01-01

    Full Text Available A quadrature-based mixed Petrov-Galerkin finite element method is applied to a fourth-order linear ordinary differential equation. After employing a splitting technique, a cubic spline trial space and a piecewise linear test space are considered in the method. The integrals are then replaced by the Gauss quadrature rule in the formulation itself. Optimal order a priori error estimates are obtained without any restriction on the mesh.

  9. A comparison between a refined two-point model for the limited tokamak SOL and self-consistent plasma turbulence simulations

    Science.gov (United States)

    Wersal, C.; Ricci, P.; Loizu, J.

    2017-04-01

    A refined two-point model is derived from the drift-reduced Braginskii equations for the limited tokamak scrape-off layer (SOL) by balancing the parallel and perpendicular transport of plasma and heat and taking into account the plasma–neutral interaction. The model estimates the electron temperature drop along a field line, from a region far from the limiter to the limiter plates. Self-consistent first-principles turbulence simulations of the SOL plasma including its interaction with neutral atoms are performed with the GBS code and compared to the refined two-point model. The refined two-point model is shown to be in very good agreement with the turbulence simulation results.

  10. An Algorithm of Calculating the Position in a Self-Capacitance Touch Screen

    Science.gov (United States)

    Zhang, Huan; Peng, Haiyan; Qian, Xiaoli; Ren, Can; Wang, Wentao; Li, Jianjun

    Touch screens have been widely used in many kinds of electronic products. For many capacitive touch sensing devices, they always suffer from a variety of electronic signal noises. So when a finger touches the screen, it is difficult to calculate the exact touch position on the screen. We proposed an algorithm of calculating the position in a self-capacitance touch screen to alleviate noise interference. We determined the touch region by calculating the differences between current data and reference data in every channel. In the touch region we divided it into different ranges to calculate the touch point. The simulation results show that the algorithm that we proposed can alleviate noise interference effectively and obtain the exact positioning on touch screen accurately.

  11. Galaxy Tab Covers Samsung TouchWiz Interface

    CERN Document Server

    Gralla, Preston

    2011-01-01

    Galaxy Tab lets you work, play, read, and connect on the go, but mastering its TouchWiz interface and finding the best apps can be tricky-unless you have this Missing Manual. Gadget whiz Preston Gralla provides crystal-clear explanations and step-by-step instructions to get you up to speed quickly, whether you have the 3G/4G or Wi-Fi version of this amazing device. The important stuff you need to know: Design your experience. Add interactive widgets and mini-apps to your screen with TouchWiz.Satisfy your appetite. Download thousands of games and apps from the Android Market.Keep in touch. Ch

  12. Segmentation of Telugu Touching Conjunct Consonants Using Overlapping Bounding Boxes

    Directory of Open Access Journals (Sweden)

    J. Bharathi

    2013-06-01

    Full Text Available Telugu is an ancient historic language. It is spoken by about 84.6 million people of Andhra Pradesh. The script has circular orthography with few horizontal and slant strokes. Huge literature exists for this language in printed form which needs to be preserved by scanning and converting it into editable form. Segmentation of touching characters is a major issue in any OCR system. Segmenting the wordsinto individual glyphs by Connected Component Analysis yields poor results due to touching characters. Touching conjunct consonants is the major component which needs to be properly addressed for improving the accuracy of an OCR system. In this paper an overlapping bounding box approach is presented for segmenting the conjunct consonants along with an algorithm for identifying the correcttouching location. An accuracy rate of 91.27% is achieved.

  13. An ergonomics study of thumb movements on smartphone touch screen.

    Science.gov (United States)

    Xiong, Jinghong; Muraki, Satoshi

    2014-01-01

    This study investigated the relationships between thumb muscle activity and thumb operating tasks on a smartphone touch screen with one-hand posture. Six muscles in the right thumb and forearm were targeted in this study, namely adductor pollicis, flexor pollicis brevis, abductor pollicis brevis (APB), abductor pollicis longus, first dorsal interosseous (FDI) and extensor digitorum. The performance measures showed that the thumb developed fatigue rapidly when tapping on smaller buttons (diameter: 9 mm compared with 3 mm), and moved more slowly in flexion-extension than in adduction-abduction orientation. Meanwhile, the electromyography and perceived exertion values of FDI significantly increased in small button and flexion-extension tasks, while those of APB were greater in the adduction-abduction task. This study reveals that muscle effort among thumb muscles on a touch screen smartphone varies according to the task, and suggests that the use of small touch buttons should be minimised for better thumb performance.

  14. Adapting deployed touch screen displays for NVG compatibility

    Science.gov (United States)

    Gaudette, Claude

    2008-04-01

    As the battlefield becomes "digitized", all arms of the military are deploying COTS displays in the form of Portable Notebooks, Kneeboards, GPS and PDA's in ever greater numbers. Many of these COTS equipments and associated displays use full color LCD's and resistive touch panels as the operator-interface. These displays are a challenge to those who must modify the COTS equipment for NVG compatibility. Traditional NVG filter options have relatively poor color rendering and are too thick or rigid to interface with touch panels. In addition, many of these displays do not have sufficient dimming capabilities to allow covert night-time operations and do not have sufficient luminance for daytime operations. Polymeric materials recently developed by Wamco have been specifically designed for applications where traditional NVG filters have failed. These applications will be discussed and quantified in terms of NVG Compatibility, Color Rendering, Luminance Contrast and Daytime Readability, Touch Screen Sensitivity and Environmental Performance.

  15. Acetylated tubulin is essential for touch sensation in mice.

    Science.gov (United States)

    Morley, Shane J; Qi, Yanmei; Iovino, Loredana; Andolfi, Laura; Guo, Da; Kalebic, Nereo; Castaldi, Laura; Tischer, Christian; Portulano, Carla; Bolasco, Giulia; Shirlekar, Kalyanee; Fusco, Claudia M; Asaro, Antonino; Fermani, Federica; Sundukova, Mayya; Matti, Ulf; Reymond, Luc; De Ninno, Adele; Businaro, Luca; Johnsson, Kai; Lazzarino, Marco; Ries, Jonas; Schwab, Yannick; Hu, Jing; Heppenstall, Paul A

    2016-12-13

    At its most fundamental level, touch sensation requires the translation of mechanical energy into mechanosensitive ion channel opening, thereby generating electro-chemical signals. Our understanding of this process, especially how the cytoskeleton influences it, remains unknown. Here we demonstrate that mice lacking the α-tubulin acetyltransferase Atat1 in sensory neurons display profound deficits in their ability to detect mechanical stimuli. We show that all cutaneous afferent subtypes, including nociceptors have strongly reduced mechanosensitivity upon Atat1 deletion, and that consequently, mice are largely insensitive to mechanical touch and pain. We establish that this broad loss of mechanosensitivity is dependent upon the acetyltransferase activity of Atat1, which when absent leads to a decrease in cellular elasticity. By mimicking α-tubulin acetylation genetically, we show both cellular rigidity and mechanosensitivity can be restored in Atat1 deficient sensory neurons. Hence, our results indicate that by influencing cellular stiffness, α-tubulin acetylation sets the force required for touch.

  16. Evaluation of Four Fingerprint Development Methods for Touch Chemistry Using Matrix-Assisted Laser Desorption Ionization/Time-of-Flight Mass Spectrometry(.).

    Science.gov (United States)

    Kaplan-Sandquist, Kimberly A; LeBeau, Marc A; Miller, Mark L

    2015-05-01

    Four preparation techniques for MALDI/TOF mass spectrometry were compared to determine the ability to gather intelligence for investigations through the chemical analysis of latent fingerprints, defined as "touch chemistry." Compatible fingerprint development processes used for identification along with new techniques are necessary to evaluate touch chemistry. Ten volunteers deposited fingerprints from solvent residues containing drugs and explosives onto microscope slides. The developers included (A) fingerprint powder, (B) MALDI matrix, (C) fingerprint powder and lifting, and (D) cyanoacrylate fuming with fingerprint powder. Qualitative identification was based on ion images and spectra. The highest average detection rates (88%) were found using methods A and B. Methods C (52%) or D (18%) had limited success. Results demonstrate the importance of imaging coupled to extracted mass spectral data in detecting analytes in deposited fingerprints. Overall, the results suggest continued development of touch chemistry applications could prove useful for gathering intelligence and forensically relevant information.

  17. Capacitive Touch User Interface and Implementation with Virtual Refrigerator

    Directory of Open Access Journals (Sweden)

    MIT Academy of Engineering Global Technology and Engineering centre, Whirlpool of India

    2014-05-01

    Full Text Available The proposed User Interface incorporates 14 Touch keys, including slider and wheeler functionality using self capacitance technology, 24 side throw LED with intensity controlled Fade-IN, Fade-OUT effects, Buzzer chime, Voltage regulator circuit, and communication circuitry for the control board. The major advantage that this User Interface is that the entire assembly is less than 10mm thick including PCB, components, light guide and graphics sticker. In this project the mentioned capacitive touch user Interface is interfaced with a Lab view system simulating a virtual refrigerator capable of responding to the commands from the User Interface.

  18. Explore the interactive design of touch interface Webpage

    Directory of Open Access Journals (Sweden)

    JIANG Zhen

    2014-12-01

    Full Text Available With the arrival of the era of mobile touch,website HTML,CSS and JavaScript building have been changed.Especially the functional development of hypertext markup language HTML5 and touch interface not only enhances the speed of the Website,but also creates amazing user experiences.Therefore,now Webpage design focus on the transmission of information at the same time,more concerns itself about the personalized and interactive design of users,including visual experience,browsing expect and psychological interaction,etc.

  19. Touch and technology: Two paradigms of patient care.

    Science.gov (United States)

    Gadow, S

    1984-03-01

    Technology violates human dignity only to the extent that its use reduces persons to the moral status of objects. The prevalence of technology in health care is an extension of the scientific paradigm, in which the body is reduced to an object void of subjectivity. The empathie paradigm, in contrast, is based upon the moral primacy of subjectivity. Empathic touch-as distinct from instrumental and philanthropic touch-establishes a clinical relation of intersubjectivity, affirming in patients the dignity and worth that morally distinguish persons from objects.

  20. Gesture Recognition for Educational Games: Magic Touch Math

    Science.gov (United States)

    Kye, Neo Wen; Mustapha, Aida; Azah Samsudin, Noor

    2017-08-01

    Children nowadays are having problem learning and understanding basic mathematical operations because they are not interested in studying or learning mathematics. This project proposes an educational game called Magic Touch Math that focuses on basic mathematical operations targeted to children between the age of three to five years old using gesture recognition to interact with the game. Magic Touch Math was developed in accordance to the Game Development Life Cycle (GDLC) methodology. The prototype developed has helped children to learn basic mathematical operations via intuitive gestures. It is hoped that the application is able to get the children motivated and interested in mathematics.

  1. 钻石魅力多普达Touch Diamond

    Institute of Scientific and Technical Information of China (English)

    士心

    2008-01-01

    多普达Touch Diamond号称是"iPhone杀手"的Windows Mobile智能手机。机身背面独特的钻石切割设计元素让人耳目一新,融合了目前高端配置功能,不论是靓丽的VGA屏幕、Touch Flo 3D界面,还是重力感应或4GB机身内存,都吸引了市场的关注。

  2. Teen Appeal — Touching the Moving Point

    Science.gov (United States)

    Handford, Christina

    An article to discuss the difficulties of designing educational multimedia for the teen target audience (13 - 16 year olds). The report will assess techniques used in existing online artefacts and reveal major trends in the attempt to appeal to this notoriously hard to reach user group.

  3. A comparison of virtual touch tissue quantification and digital rectal examination for discrimination between prostate cancer and benign prostatic hyperplasia

    OpenAIRE

    Zheng, Xiaozhi; Ji, Ping; Mao, Hongwei; Hu, Jianqun

    2011-01-01

    Background Virtual touch tissue quantification (VTTQ) is a new, promising technique for detecting the stiffness of tissues. The aim of this study is to compare the performance of VTTQ and digital rectal examination (DRE) in discrimination between prostate cancer and benign prostatic hyperplasia (BPH). Patients and methods VTTQ was performed in 209 prostate nodular lesions of 107 patients with BPH and suspected prostate cancer before the prostate histopathologic examination. The shear wave vel...

  4. On the problem of mass dependence of the two-point function of the real scalar free massive field on the light cone

    Energy Technology Data Exchange (ETDEWEB)

    Ullrich, Peter [Institut fuer Informatik, TU Muenchen, Boltzmannstrasse 3, D-85748 Garching (Germany); Werner, Ernst [Institut fuer Physik, Universitaet Regensburg, Universitaetsstrasse 31, D-93040 Regensburg (Germany)

    2006-05-19

    We investigate the generally assumed inconsistency in light cone quantum field theory that the restriction of a massive, real scalar free field to the nullplane {sigma} = {l_brace}x{sup 0} + x{sup 3} = 0{r_brace} is independent of mass (Leutwyler, Klauder and Streit 1970 Nuovo Cimento A 66 536), but the restriction of the two-point function is mass dependent (see, e.g., Nakanishi and Yamawaki 1977 Nucl. Phys. B 122 15; Yamawaki K 1997 Proc. Int. Workshop New Nonperturbative Methods and Quantization on the Light Cone (Les Houches, France) Preprint hep-th/9707141). We resolve this inconsistency by showing that the two-point function has no canonical restriction to {sigma} in the sense of distribution theory. Only the so-called tame restriction of the two-point function, which we have introduced in (Ullrich P 2004 Uniqueness in the characteristic Cauchy problem of the Klein-Gordon equation and tame restrictions of generalized functions Preprint math-ph/0408022 (submitted)) exists. Furthermore, we show that this tame restriction is indeed independent of the mass. Hence the inconsistency is induced by the erroneous assumption that the two-point function has a (canonical) restriction to {sigma}.

  5. Mode-sum construction of the covariant graviton two-point function in the Poincaré patch of de Sitter space

    Science.gov (United States)

    Fröb, Markus B.; Higuchi, Atsushi; Lima, William C. C.

    2016-06-01

    We construct the graviton two-point function for a two-parameter family of linear covariant gauges in n -dimensional de Sitter space. The construction is performed via the mode-sum method in the Bunch-Davies vacuum in the Poincaré patch, and a Fierz-Pauli mass term is introduced to regularize the infrared (IR) divergences. The resulting two-point function is de Sitter invariant and free of IR divergences in the massless limit (for a certain range of parameters), although analytic continuation with respect to the mass for the pure-gauge sector of the two-point function is necessary for this result. This general result agrees with the propagator obtained by analytic continuation from the sphere [Phys. Rev. D 34, 3670 (1986); Classical Quantum Gravity 18, 4317 (2001)]. However, if one starts with strictly zero mass theory, the IR divergences are absent only for a specific value of one of the two parameters, with the other parameter left generic. These findings agree with recent calculations in the Landau (exact) gauge [J. Math. Phys. 53, 122502 (2012)], where IR divergences do appear in the spin-two (tensor) part of the two-point function. However, we find the strength (including the sign) of the IR divergence to be different from the one found in this reference.

  6. Characterizing the relative role of low-frequency and turbulent processes in the nocturnal boundary layer through the analysis of two-point correlations of the wind components

    Science.gov (United States)

    Teichrieb, Claudio A.; Acevedo, Otávio C.; Degrazia, Gervásio A.; Moraes, Osvaldo L. L.; Roberti, Débora R.; Zimermann, Hans R.; Santos, Daniel M.; Alves, Rita C. M.

    2013-03-01

    The study presents an analysis of two-point correlations between time series of nocturnal atmospheric wind, obtained from two micrometeorological towers, 45 m horizontally apart, each equipped with two sonic anemometers, 2.5 m vertically apart. It focuses on the scale dependence of the two-point correlations obtained from sensors vertically and horizontally separated. In particular, the role of low-frequency non-turbulent processes in the correlations is assessed, and compared to that of the turbulent scales of motion. The vertical correlations of the streamwise and vertical wind components show little dependence on the turbulence intensity, but those of the spanwise component decrease appreciably as it gets more turbulent. Multiresolution decomposition shows that the two-point correlations become increasingly dominated by low-frequency scales as it gets less turbulent, and that such large-scale processes are largely reduced in fully turbulent conditions. It is also shown that the vertical correlations of the spanwise wind component is negative for very small time scales. Horizontal two-point correlations obtained at the 45 m separation distance between the towers are almost entirely dominated by low-frequency motions, regardless of the turbulence intensity, but the magnitude of such correlations decreases with increasing turbulence intensity for any wind components. A comparison between the horizontal two-point correlations and autocorrelations taken with a time lag given by the ratio of the horizontal separation to the mean wind component in the direction that connects the two towers leads to the conclusion that the statistical properties of turbulence are often preserved over the horizontal distance, despite the lack of turbulence correlations for that separation.

  7. Temperature limit values for touching cold surfaces with the fingertip

    NARCIS (Netherlands)

    Geng, Q.; Holme, I.; Hartog, E.A. den; Havenith, G.; Jay, O.; Malchaires, J.; Piette, A.; Rintama, H.; Rissanen, S.

    2006-01-01

    Objectives: At the request of the European Commission and in the framework of the European Machinery Directive, research was performed in five different laboratories to develop specifications for surface temperature limit values for the short-term accidental touching of the fingertip with cold

  8. Temperature limit values for touching cold surfaces with the fingertip

    NARCIS (Netherlands)

    Geng, Q.; Holme, I.; Hartog, E.A. den; Havenith, G.; Jay, O.; Malchaires, J.; Piette, A.; Rintama, H.; Rissanen, S.

    2006-01-01

    Objectives: At the request of the European Commission and in the framework of the European Machinery Directive, research was performed in five different laboratories to develop specifications for surface temperature limit values for the short-term accidental touching of the fingertip with cold surfa

  9. Perception of simulated local shapes using active and passive touch.

    Science.gov (United States)

    Smith, Allan M; Chapman, C Elaine; Donati, François; Fortier-Poisson, Pascal; Hayward, Vincent

    2009-12-01

    This study reexamined the perceptual equivalence of active and passive touch using a computer-controlled force-feedback device. Nine subjects explored a 6 x 10-cm workspace, with the index finger resting on a mobile flat plate, and experienced simulated Gaussian ridges and troughs (width, 15 mm; amplitude, 0.5 to 4.5 mm). The device simulated shapes by modulating either lateral resistance with no vertical movement or by vertical movement with no lateral forces, as a function of the digit position in the horizontal workspace. The force profiles and displacements recorded during active touch were played back to the stationary finger in the passive condition, ensuring that stimulation conditions were identical. For the passive condition, shapes simulated by vertical displacements of the finger had lower categorization thresholds and higher magnitude estimates compared with those of active touch. In contrast, the results with the lateral force fields showed that with passive touch, subjects recognized that a stimulus was present but were unable to correctly categorize its shape as convex or concave. This result suggests that feedback from the motor command can play an important role in processing sensory inputs during tactile exploration. Finally, subjects were administered a ring-block anesthesia of the digital nerves of the index finger and subsequently retested. Removing skin sensation significantly increased the categorization threshold for the perception of shapes generated by lateral force fields, but not for those generated by displacement fields.

  10. Collaborative Learning with Multi-Touch Technology: Developing Adaptive Expertise

    Science.gov (United States)

    Mercier, Emma M.; Higgins, Steven E.

    2013-01-01

    Developing fluency and flexibility in mathematics is a key goal of upper primary schooling, however, while fluency can be developed with practice, designing activities that support the development of flexibility is more difficult. Drawing on concepts of adaptive expertise, we developed a task for a multi-touch classroom, NumberNet, that aimed to…

  11. High Touch in a High-Tech World

    Science.gov (United States)

    Gibson, Cindy L.

    2009-01-01

    In a world of high tech and low touch, it is easy for public relations programs to stray from tried-and-true interpersonal strategies long associated with solid communication planning. New technologies allow communications professionals to quickly send e-mails and telephone calls to selected groups. Social media sites provide users immediate…

  12. Multimedia programming using Max/MSP and TouchDesigner

    CERN Document Server

    Lechner, Patrik

    2014-01-01

    If you want to learn how to use Max 6 and/or TouchDesigner, or work in audio-visual real-time processing, this is the book for you. It is intended for intermediate users of both programs and can be helpful for artists, designers, musicians, VJs, and researchers. A basic understanding of audio principles is advantageous.

  13. [A research pathway in care and relational touch].

    Science.gov (United States)

    Bourhis, Hélène

    2017-03-01

    Passionate about the relational dimension of care, this nurse-turned-researcher shares with us the key stages of her university career guided by the place of touch in the therapeutic relationship. Copyright © 2017 Elsevier Masson SAS. All rights reserved.

  14. A task control theory of mirror-touch synesthesia.

    Science.gov (United States)

    Heyes, Cecilia; Catmur, Caroline

    2015-01-01

    Ward and Banissy's illuminating discussion of mirror-touch synesthesia (MTS) encourages research testing two alternatives to Threshold Theory: Their own Self-Other Theory, and "Task Control Theory". MTS may be due to abnormal mirror activity plus a domain-general, rather than a specifically social, impairment in the ability to privilege processing of task-relevant over task-irrelevant information.

  15. Primary somatosensory cortex discriminates affective significance in social touch

    NARCIS (Netherlands)

    Gazzola, Valeria; Spezio, Michael L.; Etzel, Joset A.; Castelli, Fulvia; Adolphs, Ralph; Keysers, Christian

    2012-01-01

    Another person's caress is one of the most powerful of all emotional social signals. How much the primary somatosensory cortices (SIs) participate in processing the pleasantness of such social touch remains unclear. Although ample empirical evidence supports the role of the insula in affective proce

  16. The use of healing touch in integrative oncology.

    Science.gov (United States)

    Hart, Laura K; Freel, Mildred I; Haylock, Pam J; Lutgendorf, Susan K

    2011-10-01

    The use of complementary therapies by patients with cancer has become increasingly prevalent; as a result, oncology nurses find themselves needing to understand those therapies and the evidence-based support for their use. This article describes the integrative use of the biofield therapy healing touch in conjunction with the chemoradiation received by patients with cervical cancer (stages IB1 to IVA) as reported in a 2010 research study. Findings indicated effects on the immune response and depression in healing touch recipients compared to patients receiving relaxation or standard care. Specifically, healing touch recipients demonstrated a minimal decrease in natural killer cell cytotoxicity over the course of treatment, whereas the cytotoxicity of patients receiving relaxation therapy and standard care declined sharply during radiation. Healing touch recipients also showed decreases in depressed mood compared to relaxation therapy and standard care recipients. The findings suggest that appropriate integration of complementary modalities into oncology care can enhance the impact of conventional care by putting patients in the best condition to use their innate healing resources.

  17. 78 FR 37998 - Electronic One Touch Bingo System

    Science.gov (United States)

    2013-06-25

    ... to IGRA, Class II bingo has three elements. First, it must be played for prizes, including monetary... statutory requirements for a game of bingo. The type of one touch game at issue here is played for prizes... policy toward technology, a key distinction for the Committee was that technological aids are...

  18. Web-Based Spatial Training Using Handheld Touch Screen Devices

    Science.gov (United States)

    Martin-Dorta, Norena; Saorin, Jose Luis; Contero, Manuel

    2011-01-01

    This paper attempts to harness the opportunities for mobility and the new user interfaces that handheld touch screen devices offer, in a non-formal learning context, with a view to developing spatial ability. This research has addressed two objectives: first, analyzing the effects that training can have on spatial visualisation using the…

  19. A low cost touch-screen interface for image collage

    Directory of Open Access Journals (Sweden)

    Idanis Díaz Bolaño

    2011-01-01

    Full Text Available En este artículo se presenta el diseño de una interfaz de bajo costo basada en interacción touch-screen para crear collage de imágenes. La interfaz fue diseñada para propósitos de rehabilitación, tales como la estimulación de desarrollo cognitivo, habilidades motoras, creatividad y expresividad. La interacción touch-screen de la interfaz se basa en la utilización de un control remoto de Wii. Para evaluar la eficiencia de la interfaz, el diseño touch-screen fue comparado con un diseño basado en interacción con el mouse. A pesar de los problemas inherentes a la baja resolución de la cámara infrarroja del Wii Remote, los resultados experimentales obtenidos muestran que la versión del sistema touch-screen permitió un mejor desempeño para realizar tareas que requieren habilidades motoras finas, tales como delinear la forma libre de una figura.

  20. Young Children Learning from Touch Screens: Taking a Wider View

    Directory of Open Access Journals (Sweden)

    Silvia Lovato

    2016-07-01

    Full Text Available Touch screen devices such as smartphones and tablets are now ubiquitous in the lives of American children. These devices permit very young children to engage interactively in an intuitive fashion with actions as simple as touching, swiping and pinching. Yet, we know little about the role these devices play in very young children’s lives or their impact on early learning and development. Here we focus on two areas in which existing research sheds some light on these issues with children under three years of age. The first measures transfer of learning, or how well children use information learned from screens to reason about events off-screen, using object retrieval and word learning tasks. The second measures the impact of interactive screens on parent-child interactions and story comprehension during reading time. More research is required to clarify the pedagogical potential and pitfalls of touch screens for infants and very young children, especially research focused on capabilities unique to touch screens and on the social and cultural contexts in which young children use them.

  1. Young Children Learning from Touch Screens: Taking a Wider View.

    Science.gov (United States)

    Lovato, Silvia B; Waxman, Sandra R

    2016-01-01

    Touch screen devices such as smartphones and tablets are now ubiquitous in the lives of American children. These devices permit very young children to engage interactively in an intuitive fashion with actions as simple as touching, swiping and pinching. Yet, we know little about the role these devices play in very young children's lives or their impact on early learning and development. Here we focus on two areas in which existing research sheds some light on these issues with children under 3 years of age. The first measures transfer of learning, or how well children use information learned from screens to reason about events off-screen, using object retrieval and word learning tasks. The second measures the impact of interactive screens on parent-child interactions and story comprehension during reading time. More research is required to clarify the pedagogical potential and pitfalls of touch screens for infants and very young children, especially research focused on capabilities unique to touch screens and on the social and cultural contexts in which young children use them.

  2. Mobile touch: NFC-like interaction with yesterday's phones

    NARCIS (Netherlands)

    Klos, V.; Deventer, M.O. van; Staalduinen, M. van; Hartog, F.T.H. den

    2009-01-01

    Near Field Communication (NFC) enables fast interactive mobile services as it allows two mobile devices to quickly and securely exchange information when they are within touching range. However, NFC-enabled phones are virtually absent on the market today, which impedes the break-through of these

  3. Aging affects attunement in perceiving length by dynamic touch

    NARCIS (Netherlands)

    Withagen, Rob; Caljouw, Simone R.

    2011-01-01

    Earlier studies have revealed age-dependent differences in perception by dynamic touch. In the present study, we examined whether the capacity to learn deteriorates with aging. Adopting an ecological approach to learning, the authors examined the process of attunement-that is, the changes in what in

  4. Fetal Behavioural Responses to Maternal Voice and Touch.

    Directory of Open Access Journals (Sweden)

    Viola Marx

    Full Text Available Although there is data on the spontaneous behavioural repertoire of the fetus, studies on their behavioural responses to external stimulation are scarce.The aim of the current study was to measure fetal behavioural responses in reaction to maternal voice; to maternal touch of the abdomen compared to a control condition, utilizing 3D real-time (4D sonography. Behavioural responses of 23 fetuses (21st to 33rd week of gestation; N = 10 in the 2nd and N = 13 in the 3rd trimester were frame-by-frame coded and analyzed in the three conditions.Results showed that fetuses displayed more arm, head, and mouth movements when the mother touched her abdomen and decreased their arm and head movements to maternal voice. Fetuses in the 3rd trimester showed increased regulatory (yawning, resting (arms crossed and self-touch (hands touching the body responses to the stimuli when compared to fetuses in the 2nd trimester.In summary, the results from this study suggest that fetuses selectively respond to external stimulation earlier than previously reported, fetuses actively regulated their behaviours as a response to the external stimulation, and that fetal maturation affected the emergence of these differential responses to the environment.

  5. Biomimetic approaches to bionic touch through a peripheral nerve interface.

    Science.gov (United States)

    Saal, Hannes P; Bensmaia, Sliman J

    2015-12-01

    State-of-the-art prosthetic hands nearly match the dexterity of the human hand, and sophisticated approaches have been developed to control them intuitively. However, grasping and dexterously manipulating objects relies heavily on the sense of touch, without which we would struggle to perform even the most basic activities of daily living. Despite the importance of touch, not only in motor control but also in affective communication and embodiment, the restoration of touch through bionic hands is still in its infancy, a shortcoming that severely limits their effectiveness. Here, we focus on approaches to restore the sense of touch through an electrical interface with the peripheral nerve. First, we describe devices that can be chronically implanted in the nerve to electrically activate nerve fibers. Second, we discuss how these interfaces have been used to convey basic somatosensory feedback. Third, we review what is known about how the somatosensory nerve encodes information about grasped objects in intact limbs and discuss how these natural neural codes can be exploited to convey artificial tactile feedback. Finally, we offer a blueprint for how these codes could be implemented in a neuroprosthetic device to deliver rich, natural, and versatile tactile sensations.

  6. Mobile touch: NFC-like interaction with yesterday's phones

    NARCIS (Netherlands)

    Klos, V.; Deventer, M.O. van; Staalduinen, M. van; Hartog, F.T.H. den

    2009-01-01

    Near Field Communication (NFC) enables fast interactive mobile services as it allows two mobile devices to quickly and securely exchange information when they are within touching range. However, NFC-enabled phones are virtually absent on the market today, which impedes the break-through of these use

  7. An optimal algorithm based on extended kalman filter and the data fusion for infrared touch overlay

    Science.gov (United States)

    Zhou, AiGuo; Cheng, ShuYi; Pan, Qiang Biao; Sun, Dong Yu

    2016-01-01

    Current infrared touch overlay has problems on the touch point recognition which bring some burrs on the touch trajectory. This paper uses the target tracking algorithm to improve the recognition and smoothness of infrared touch overlay. In order to deal with the nonlinear state estimate problem for touch point tracking, we use the extended Kalman filter in the target tracking algorithm. And we also use the data fusion algorithm to match the estimate value with the original target trajectory. The experimental results of the infrared touch overlay demonstrate that the proposed target tracking approach can improve the touch point recognition of the infrared touch overlay and achieve much smoother tracking trajectory than the existing tracking approach.

  8. Rubber hands feel touch, but not in blind individuals.

    Science.gov (United States)

    Petkova, Valeria I; Zetterberg, Hedvig; Ehrsson, H Henrik

    2012-01-01

    Psychology and neuroscience have a long-standing tradition of studying blind individuals to investigate how visual experience shapes perception of the external world. Here, we study how blind people experience their own body by exposing them to a multisensory body illusion: the somatic rubber hand illusion. In this illusion, healthy blindfolded participants experience that they are touching their own right hand with their left index finger, when in fact they are touching a rubber hand with their left index finger while the experimenter touches their right hand in a synchronized manner (Ehrsson et al. 2005). We compared the strength of this illusion in a group of blind individuals (n = 10), all of whom had experienced severe visual impairment or complete blindness from birth, and a group of age-matched blindfolded sighted participants (n = 12). The illusion was quantified subjectively using questionnaires and behaviorally by asking participants to point to the felt location of the right hand. The results showed that the sighted participants experienced a strong illusion, whereas the blind participants experienced no illusion at all, a difference that was evident in both tests employed. A further experiment testing the participants' basic ability to localize the right hand in space without vision (proprioception) revealed no difference between the two groups. Taken together, these results suggest that blind individuals with impaired visual development have a more veridical percept of self-touch and a less flexible and dynamic representation of their own body in space compared to sighted individuals. We speculate that the multisensory brain systems that re-map somatosensory signals onto external reference frames are less developed in blind individuals and therefore do not allow efficient fusion of tactile and proprioceptive signals from the two upper limbs into a single illusory experience of self-touch as in sighted individuals.

  9. Effects of mediated social touch on affective experiences and trust.

    Science.gov (United States)

    Erk, Stefanie M; Toet, Alexander; Van Erp, Jan B F

    2015-01-01

    This study investigated whether communication via mediated hand pressure during a remotely shared experience (watching an amusing video) can (1) enhance recovery from sadness, (2) enhance the affective quality of the experience, and (3) increase trust towards the communication partner. Thereto participants first watched a sad movie clip to elicit sadness, followed by a funny one to stimulate recovery from sadness. While watching the funny clip they signaled a hypothetical fellow participant every time they felt amused. In the experimental condition the participants responded by pressing a hand-held two-way mediated touch device (a Frebble), which also provided haptic feedback via simulated hand squeezes. In the control condition they responded by pressing a button and they received abstract visual feedback. Objective (heart rate, galvanic skin conductance, number and duration of joystick or Frebble presses) and subjective (questionnaires) data were collected to assess the emotional reactions of the participants. The subjective measurements confirmed that the sad movie successfully induced sadness while the funny movie indeed evoked more positive feelings. Although their ranking agreed with the subjective measurements, the physiological measurements confirmed this conclusion only for the funny movie. The results show that recovery from movie induced sadness, the affective experience of the amusing movie, and trust towards the communication partner did not differ between both experimental conditions. Hence, feedback via mediated hand touching did not enhance either of these factors compared to visual feedback. Further analysis of the data showed that participants scoring low on Extraversion (i.e., persons that are more introvert) or low on Touch Receptivity (i.e., persons who do not like to be touched by others) felt better understood by their communication partner when receiving mediated touch feedback instead of visual feedback, while the opposite was found for

  10. Effects of mediated social touch on affective experiences and trust

    Directory of Open Access Journals (Sweden)

    Stefanie M. Erk

    2015-10-01

    Full Text Available This study investigated whether communication via mediated hand pressure during a remotely shared experience (watching an amusing video can (1 enhance recovery from sadness, (2 enhance the affective quality of the experience, and (3 increase trust towards the communication partner. Thereto participants first watched a sad movie clip to elicit sadness, followed by a funny one to stimulate recovery from sadness. While watching the funny clip they signaled a hypothetical fellow participant every time they felt amused. In the experimental condition the participants responded by pressing a hand-held two-way mediated touch device (a Frebble, which also provided haptic feedback via simulated hand squeezes. In the control condition they responded by pressing a button and they received abstract visual feedback. Objective (heart rate, galvanic skin conductance, number and duration of joystick or Frebble presses and subjective (questionnaires data were collected to assess the emotional reactions of the participants. The subjective measurements confirmed that the sad movie successfully induced sadness while the funny movie indeed evoked more positive feelings. Although their ranking agreed with the subjective measurements, the physiological measurements confirmed this conclusion only for the funny movie. The results show that recovery from movie induced sadness, the affective experience of the amusing movie, and trust towards the communication partner did not differ between both experimental conditions. Hence, feedback via mediated hand touching did not enhance either of these factors compared to visual feedback. Further analysis of the data showed that participants scoring low on Extraversion (i.e., persons that are more introvert or low on Touch Receptivity (i.e., persons who do not like to be touched by others felt better understood by their communication partner when receiving mediated touch feedback instead of visual feedback, while the opposite was

  11. Rubber hands feel touch, but not in blind individuals.

    Directory of Open Access Journals (Sweden)

    Valeria I Petkova

    Full Text Available Psychology and neuroscience have a long-standing tradition of studying blind individuals to investigate how visual experience shapes perception of the external world. Here, we study how blind people experience their own body by exposing them to a multisensory body illusion: the somatic rubber hand illusion. In this illusion, healthy blindfolded participants experience that they are touching their own right hand with their left index finger, when in fact they are touching a rubber hand with their left index finger while the experimenter touches their right hand in a synchronized manner (Ehrsson et al. 2005. We compared the strength of this illusion in a group of blind individuals (n = 10, all of whom had experienced severe visual impairment or complete blindness from birth, and a group of age-matched blindfolded sighted participants (n = 12. The illusion was quantified subjectively using questionnaires and behaviorally by asking participants to point to the felt location of the right hand. The results showed that the sighted participants experienced a strong illusion, whereas the blind participants experienced no illusion at all, a difference that was evident in both tests employed. A further experiment testing the participants' basic ability to localize the right hand in space without vision (proprioception revealed no difference between the two groups. Taken together, these results suggest that blind individuals with impaired visual development have a more veridical percept of self-touch and a less flexible and dynamic representation of their own body in space compared to sighted individuals. We speculate that the multisensory brain systems that re-map somatosensory signals onto external reference frames are less developed in blind individuals and therefore do not allow efficient fusion of tactile and proprioceptive signals from the two upper limbs into a single illusory experience of self-touch as in sighted individuals.

  12. Dual innervation of neonatal Merkel cells in mouse touch domes.

    Directory of Open Access Journals (Sweden)

    Jingwen Niu

    Full Text Available Merkel cell-neurite complexes are specialized mechanosensory end organs that mediate discriminative touch sensation. It is well established that type I slowly adapting (SAI mechanoreceptors, which express neural filament heavy chain (NFH, innervate Merkel cells. It was previously shown that neurotrophic factor NT3 and its receptor TrkC play crucial roles in controlling touch dome Merkel cell innervation of NFH+ fibers. In addition, nerve fibers expressing another neurotrophic tyrosine receptor kinase (NTRK, Ret, innervate touch dome Merkel cells as well. However, the relationship between afferents responsive to NT3/TrkC signaling and those expressing Ret is unclear. It is also controversial if these Ret+ fibers belong to the early or late Ret+ DRG neurons, which are defined based on the co-expression and developmental dependence of TrkA. To address these questions, we genetically traced Ret+ and TrkC+ fibers and analyzed their developmental dependence on TrkA. We found that Merkel cells in neonatal mouse touch domes receive innervation of two types of fibers: one group is Ret+, while the other subset expresses TrkC and NFH. In addition, Ret+ fibers depend on TrkA for their survival and normal innervation whereas NFH+ Merkel cell innervating fibers are almost unaltered in TrkA mutant mice, supporting that Ret+ and NFH+/TrkC+ afferents are two distinct groups. Ret signaling, on the other hand, plays a minor role for the innervation of neonatal touch domes. In contrast, Merkel cells in the glabrous skin are mainly contacted by NFH+/TrkC+ afferents. Taken together, our results suggest that neonatal Merkel cells around hair follicles receive dual innervation while Merkel cells in the glabrous skin are mainly innervated by only SAI mechanoreceptors. In addition, our results suggest that neonatal Ret+ Merkel cell innervating fibers most likely belong to the late but not early Ret+ DRG neurons.

  13. Nuclear pasta with a touch of quantum

    Energy Technology Data Exchange (ETDEWEB)

    Vantournhout, Klaas; Jachowicz, Natalie; Ryckebusch, Jan [Department of Subatomic and Radiation Physics, Ghent University, Proeftuinstraat 86, B-9000 Gent (Belgium)

    2009-07-01

    At densities of about 10{sup 14}g/cm{sup 3}, neutron-rich matter arranges itself in a variety of complex shapes. It is suggested that these slab and rod-like structures, dubbed nuclear pasta, appear in the crust of neutron stars as well as in the centre of core-collapse supernovae, thereby influencing the dynamics of the process. For the study of these low-energy excitations, classical molecular dynamic techniques (CMD) are used. Fermionic molecular dynamics (FMD), a formalism used to model nuclei and heavy-ion collisions, rises the description of nuclear matter to a quantum mechanical level by adding antisymmetrisation, spin, isospin and probability distributions to a CMD-like formalism. The technique presented here is an extension of FMD to model bulk fermionic matter. Through the use of block-Toeplitz matrices and Jacobi-Theta functions it becomes feasible to describe infinite dimensional fermion systems. In practice this is achieved by importing periodic boundary conditions into FMD giving rise to a quantum dynamical description of nuclear matter. Results illustrating the behaviour of free Fermi gases and alpha clustering will be presented.

  14. Prospective blind comparative clinical study of two point fixation of zygomatic complex fracture using wire and mini plates

    Directory of Open Access Journals (Sweden)

    Gandi Lakshmi N

    2012-03-01

    Full Text Available Abstract Background The zygomatic maxillary complex (ZMC fractures are one of the most frequent injuries of the facial skeleton due to its position and facial contour. Assaults, road traffic accidents and falls are the principal etiologic factors that may cause fractures of zygomatic bone. The different fixation methods are applied to treat the zygomatic bone fractures, with many more classifications which have been described in the literature for the ease of management. The type of the fracture, its severity and associated facial fractures usually interferes the treatment modality. Purpose of study The aim of this paper is to show the results of 18yrs prospective blind comparative study using wire and plate osteosynthesis which needed open reduction and internal fixation involving Type II to Type IV Spissel and Schroll ZMC fractures. Materials and methods Total 80 cases included in the study out of 1780 ZMC cases which were treated using wire and plate osteosynthesis over a period of 18 yrs, involving only Type II to Type IV Spissel and Schroll ZMC fractures. Other types excluded from study to prevent observer bias. All the fixations carried out through Standard Dingman's incision using stainless steel 26 gauze wire and titanium 1.5 mm mini plate system under general anesthesia by single maxillofacial surgeon and evaluated by another maxillofacial surgeon who is blinded for surgical procedure after 2 and 4 wks of follow-up for facial symmetry, wound healing, functional assessment (mouth opening, diplopia, and sensory disturbance. All the data tabulated in Excel software (Microsoft for statistical analysis. P-value calculated to know the Significance of treatment modality in all aspects. Results Result shows no significant p-values indicating both the operating techniques are equally efficient in the surgical management of ZMC fracture. Conclusion Osteosynthesis by mini plates is simple, logical and effective treatment compared to wire

  15. Don’t touch! hands off! art, blindness and the conservation of expertise

    OpenAIRE

    Candlin, Fiona

    2004-01-01

    The embargo on touching in museums is increasingly being brought into question, not least by blind activists who are calling for greater access to collections. The provision of opportunities to touch could be read as a potential conflict between established optic knowledge and illicit haptic experience, between the conservation of objects and access to collections. Instead I suggest that touch is not necessarily other to the museum; rather, the status of who does the touching and knowing is c...

  16. Functional and structural brain differences associated with mirror-touch synaesthesia.

    Science.gov (United States)

    Holle, Henning; Banissy, Michael J; Ward, Jamie

    2013-12-01

    Observing touch is known to activate regions of the somatosensory cortex but the interpretation of this finding is controversial (e.g. does it reflect the simulated action of touching or the simulated reception of touch?). For most people, observing touch is not linked to reported experiences of feeling touch but in some people it is (mirror-touch synaesthetes). We conducted an fMRI study in which participants (mirror-touch synaesthetes, controls) watched movies of stimuli (face, dummy, object) being touched or approached. In addition we examined whether mirror touch synaesthesia is associated with local changes of grey and white matter volume in the brain using VBM (voxel-based morphometry). Both synaesthetes and controls activated the somatosensory system (primary and secondary somatosensory cortices, SI and SII) when viewing touch, and the same regions were activated (by a separate localiser) when feeling touch--i.e. there is a mirror system for touch. However, when comparing the two groups, we found evidence that SII seems to play a particular important role in mirror-touch synaesthesia: in synaesthetes, but not in controls, posterior SII was active for watching touch to a face (in addition to SI and posterior temporal lobe); activity in SII correlated with subjective intensity measures of mirror-touch synaesthesia (taken outside the scanner), and we observed an increase in grey matter volume within the SII of the synaesthetes' brains. In addition, the synaesthetes showed hypo-activity when watching touch to a dummy in posterior SII. We conclude that the secondary somatosensory cortex has a key role in this form of synaesthesia.

  17. Finding the Right Touch: Extending the Right-Touch Regulation Approach to the Accreditation of Voluntary Registers

    Science.gov (United States)

    Bilton, Douglas; Cayton, Harry

    2013-01-01

    What is "right-touch regulation"? In this article we explain why the Professional Standards Authority for Health and Social Care (the Authority) has focussed much of its policy work in recent times on seeking an answer to this question, and why it wants to know. We explain why the Authority's predecessor body, the Council for Healthcare Regulatory…

  18. A quantitative approach to defining "high-touch" surfaces in hospitals.

    Science.gov (United States)

    Huslage, Kirk; Rutala, William A; Sickbert-Bennett, Emily; Weber, David J

    2010-08-01

    Fifty interactions between healthcare workers and patients were observed to obtain a quantifiable definition of "high-touch" (ie, frequently touched) surfaces based on frequency of contact. Five surfaces were defined as high-touch surfaces: the bed rails, the bed surface, the supply cart, the over-bed table, and the intravenous pump.

  19. Toddlers' Word Learning from Contingent and Noncontingent Video on Touch Screens

    Science.gov (United States)

    Kirkorian, Heather L.; Choi, Koeun; Pempek, Tiffany A.

    2016-01-01

    Researchers examined whether contingent experience using a touch screen increased toddlers' ability to learn a word from video. One hundred and sixteen children (24-36 months) watched an on-screen actress label an object: (a) without interacting, (b) with instructions to touch "anywhere" on the screen, or (c) with instructions to touch a…

  20. Observing Touch from Video: The Influence of Social Cues on Pleasantness Perceptions

    NARCIS (Netherlands)

    Willemse, C.J.A.M.; Gijsman G.; Jung, M.M.; Erp, J.B.F. van; Heylen, D.K.J.

    2016-01-01

    In order to advance the understanding of affective touch perceptions, and in particular to inform the design of physical human-robot interactions, an online video study was conducted in which observed stroking touches were assessed on perceived pleasantness. Touches were applied at different velocit

  1. The Use of Touch in Counseling: An Ethical Decision-Making Model

    Science.gov (United States)

    Calmes, Stephanie A.; Piazza, Nick J.; Laux, John M.

    2013-01-01

    Although some counselors have advocated for the limited use of touch in counseling, others have argued that touch has no place within the counseling relationship. Despite the controversy, the use of touch has been shown to have a number of therapeutic benefits; however, there are few ethical decision-making models that are appropriate for…

  2. Enhancing the Entertainment Experience of Blind and Low-Vision Theatregoers through Touch Tours

    Science.gov (United States)

    Udo, J. P.; Fels, D. I.

    2010-01-01

    In this paper we demonstrate how universal design theory and the research available on museum-based touch tours can be used to develop a touch tour for blind and low-vision theatregoers. We discuss these theoretical and practical approaches with reference to data collected and experience gained from the creation and execution of a touch tour for…

  3. Toddlers' Word Learning from Contingent and Noncontingent Video on Touch Screens

    Science.gov (United States)

    Kirkorian, Heather L.; Choi, Koeun; Pempek, Tiffany A.

    2016-01-01

    Researchers examined whether contingent experience using a touch screen increased toddlers' ability to learn a word from video. One hundred and sixteen children (24-36 months) watched an on-screen actress label an object: (a) without interacting, (b) with instructions to touch "anywhere" on the screen, or (c) with instructions to touch a…

  4. Quarter-sweep Gauss-Seidel method with quadratic spline scheme applied to fourth order two-point boundary value problems

    Science.gov (United States)

    Mohd Fauzi, Norizyan Izzati; Sulaiman, Jumat

    2013-04-01

    The aim of this paper is to describe the application of Quarter-Sweep Gauss-Seidel (QSGS) iterative method using quadratic spline scheme for solving fourth order two-point linear boundary value problems. In the line to derive approximation equations, firstly the fourth order problems need to be reduced onto a system of second-order two-point boundary value problems. Then two linear systems have been constructed via discretization process by using the corresponding quarter-sweep quadratic spline approximation equations. The generated linear systems have been solved using the proposed QSGS iterative method to show the superiority over Full-Sweep Gauss-Seidel (FSGS) and Half-Sweep Gauss-Seidel (HSGS) methods. Computational results are provided to illustrate that the effectiveness of the proposed QSGS method is more superior in terms of computational time and number of iterations as compared to other tested methods.

  5. Stueckelberg massive electromagnetism in de Sitter and anti-de Sitter spacetimes: Two-point functions and renormalized stress-energy tensors

    CERN Document Server

    Belokogne, Andrei; Queva, Julien

    2016-01-01

    By considering Hadamard vacuum states, we first construct the two-point functions associated with Stueckelberg massive electromagnetism in de Sitter and anti-de Sitter spacetimes. Then, from the general formalism developed in [A. Belokogne and A. Folacci, Phys. Rev. D \\textbf{93}, 044063 (2016)], we obtain an exact analytical expression for the vacuum expectation value of the renormalized stress-energy tensor of the massive vector field propagating in these maximally symmetric spacetimes.

  6. Identifying nonlinear wave interactions in plasmas using two-point measurements a case study of Short Large Amplitude Magnetic Structures (SLAMS)

    CERN Document Server

    Dudok de Wit, T; Dunlop, M; Luehr, H

    1999-01-01

    A framework is described for estimating Linear growth rates and spectral energy transfers in turbulent wave-fields using two-point measurements. This approach, which is based on Volterra series, is applied to dual satellite data gathered in the vicinity of the Earth's bow shock, where Short Large Amplitude Magnetic Structures (SLAMS) supposedly play a leading role. The analysis attests the dynamic evolution of the SLAMS and reveals an energy cascade toward high-frequency waves.

  7. Existence of Positive Solutions for Two-Point Boundary Value Problems of Nonlinear Finite Discrete Fractional Differential Equations and Its Application

    OpenAIRE

    Caixia Guo; Jianmin Guo; Ying Gao; Shugui Kang

    2016-01-01

    This paper is concerned with the two-point boundary value problems of nonlinear finite discrete fractional differential equations. On one hand, we discuss some new properties of the Green function. On the other hand, by using the main properties of Green function and the Krasnoselskii fixed point theorem on cones, some sufficient conditions for the existence of at least one or two positive solutions for the boundary value problem are established.

  8. Multi-Modal, Multi-Touch Interaction with Maps in Disaster Management Applications

    Directory of Open Access Journals (Sweden)

    V. Paelke

    2012-07-01

    Full Text Available Multi-touch interaction has become popular in recent years and impressive advances in technology have been demonstrated, with the presentation of digital maps as a common presentation scenario. However, most existing systems are really technology demonstrators and have not been designed with real applications in mind. A critical factor in the management of disaster situations is the access to current and reliable data. New sensors and data acquisition platforms (e.g. satellites, UAVs, mobile sensor networks have improved the supply of spatial data tremendously. However, in many cases this data is not well integrated into current crisis management systems and the capabilities to analyze and use it lag behind sensor capabilities. Therefore, it is essential to develop techniques that allow the effective organization, use and management of heterogeneous data from a wide variety of data sources. Standard user interfaces are not well suited to provide this information to crisis managers. Especially in dynamic situations conventional cartographic displays and mouse based interaction techniques fail to address the need to review a situation rapidly and act on it as a team. The development of novel interaction techniques like multi-touch and tangible interaction in combination with large displays provides a promising base technology to provide crisis managers with an adequate overview of the situation and to share relevant information with other stakeholders in a collaborative setting. However, design expertise on the use of such techniques in interfaces for real-world applications is still very sparse. In this paper we report on interdisciplinary research with a user and application centric focus to establish real-world requirements, to design new multi-modal mapping interfaces, and to validate them in disaster management applications. Initial results show that tangible and pen-based interaction are well suited to provide an intuitive and visible way to

  9. Mode-sum construction of the covariant graviton two-point function in the Poincar\\'e patch of de Sitter space

    CERN Document Server

    Fröb, Markus B; Lima, William C C

    2016-01-01

    We construct the graviton two-point function for a two-parameter family of linear covariant gauges in n-dimensional de Sitter space. The construction is performed via the mode-sum method in the Bunch-Davies vacuum in the Poincar\\'e patch, and a Fierz-Pauli mass term is introduced to regularize the infrared (IR) divergences. The resulting two-point function is de Sitter-invariant, and free of IR divergences in the massless limit (for a certain range of parameters) though analytic continuation with respect to the mass for the pure-gauge sector of the two-point function is necessary for this result. This general result agrees with the propagator obtained by analytic continuation from the sphere [Phys. Rev. D 34, 3670 (1986); Class. Quant. Grav. 18, 4317 (2001)]. However, if one starts with strictly zero mass theory, the IR divergences are absent only for a specific value of one of the two parameters, with the other parameter left generic. These findings agree with recent calculations in the Landau (exact) gauge ...

  10. Quantifying the sensory and emotional perception of touch: differences between glabrous and hairy skin

    Directory of Open Access Journals (Sweden)

    Rochelle eAckerley

    2014-02-01

    Full Text Available The perception of touch is complex and there has been a lack of ways to describe the full tactile experience quantitatively. Guest et al. (2011 developed a Touch Perception Task (TPT in order to capture such experiences, and here we used the TPT to examine differences in sensory and emotional aspects of touch at different skin sites. We compared touch on three skin sites: the hairy arm and cheek, and the glabrous palm. The hairy skin contains C-tactile (CT afferents, which play a role in affective touch, whereas glabrous skin does not contain CT afferents and is involved in more discriminative touch. In healthy volunteers, three different materials (soft brush, sandpaper, fur were stroked across these skin sites during self-touch or experimenter-applied touch. After each stimulus, participants rated the tactile experience using descriptors in the TPT. Sensory and emotional descriptors were analysed using factor analyses. Five sensory factors were found: Texture, Pile, Moisture, Heat/Sharp and Cold/Slip, and three emotional factors: Positive Affect, Arousal and Negative Affect. Significant differences were found in the use of descriptors in touch to hairy versus glabrous skin: this was most evident in touch on forearm skin, which produced higher emotional content. The touch from another was also judged as more emotionally positive then self-touch, and participants readily discriminated between the materials on all factors. The TPT successfully probed sensory and emotional percepts of the touch experience, which aided in identifying skin where emotional touch was more pertinent. It also highlights the potentially important role for CTs in the affective processing of inter-personal touch, in combination with higher-order influences, such as through cultural belonging and previous experiences.

  11. A sensational illusion: vision-touch synaesthesia and the rubber hand paradigm.

    Science.gov (United States)

    Aimola Davies, Anne M; White, Rebekah C

    2013-03-01

    For individuals with vision-touch synaesthesia, the sight of touch on another person elicits synaesthetic tactile sensation on the observer's own body. Here we used the traditional rubber hand paradigm (Botvinick and Cohen, 1998) and a no-touch rubber hand paradigm to investigate and to authenticate synaesthetic tactile sensation. In the traditional rubber hand paradigm, the participant views a prosthetic hand being touched by the Examiner while the participant's hand - hidden from view - is also touched by the Examiner. Synchronous stimulation of the prosthetic hand and the participant's hidden hand elicits the rubber hand illusion. It may seem to the participant that she is feeling touch at the location of the viewed prosthetic hand - visual capture of touch, and that the prosthetic hand is the participant's own hand - illusion of ownership. Thus, for participants who experience the traditional rubber hand illusion, tactile sensation on the participant's hidden hand is referred to the prosthetic hand. In our no-touch rubber hand paradigm, the participant views a prosthetic hand being touched by the Examiner but the participant's hand - hidden from view - is not touched by the Examiner. Questionnaire ratings indicated that only individuals with vision-touch synaesthesia experienced the no-touch rubber hand illusion. Thus, synaesthetic tactile sensation on the (untouched) hidden hand was referred to the prosthetic hand. These individuals also demonstrated proprioceptive drift (a change, from baseline, in proprioceptively perceived position) of the hidden hand towards the location of the prosthetic hand, and a pattern of increased proprioceptive drift with increased trial duration (60 sec, 180 sec, 300 sec). The no-touch rubber hand paradigm was an excellent method to authenticate vision-touch synaesthesia because participants were naïve about the rubber hand illusion, and they could not have known how they were expected to perform on either the traditional or the

  12. Added value of Virtual Touch IQ shear wave elastography in the ultrasound assessment of breast lesions.

    Science.gov (United States)

    Ianculescu, Victor; Ciolovan, Laura Maria; Dunant, Ariane; Vielh, Philippe; Mazouni, Chafika; Delaloge, Suzette; Dromain, Clarisse; Blidaru, Alexandru; Balleyguier, Corinne

    2014-05-01

    To determine the diagnostic performance of Acoustic Radiation Force Impulse (ARFI) Virtual Touch IQ shear wave elastography in the discrimination of benign and malignant breast lesions. Conventional B-mode and elasticity imaging were used to evaluate 110 breast lesions. Elastographic assessment of breast tissue abnormalities was done using a shear wave based technique, Virtual Touch IQ (VTIQ), implemented on a Siemens Acuson S3000 ultrasound machine. Tissue mechanical properties were interpreted as two-dimensional qualitative and quantitative colour maps displaying relative shear wave velocity. Wave speed measurements in m/s were possible at operator defined regions of interest. The pathologic diagnosis was established on samples obtained by ultrasound guided core biopsy or fine needle aspiration. BIRADS based B-mode evaluation of the 48 benign and 62 malignant lesions achieved 92% sensitivity and 62.5% specificity. Subsequently performed VTIQ elastography relying on visual interpretation of the colour overlay displaying relative shear wave velocities managed similar standalone diagnostic performance with 92% sensitivity and 64.6% specificity. Lesion and surrounding tissue shear wave speed values were calculated and a significant difference was found between the benign and malignant populations (Mann-Whitney U test, pBIRADS 4a masses, we reached overall levels of 92% sensitivity and 72.9% specificity. VTIQ qualitative and quantitative elastography has the potential to further characterise B-mode detected breast lesions, increasing specificity and reducing the number of unnecessary biopsies. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  13. The Organization of Submodality-Specific Touch Afferent Inputs in the Vibrissa Column

    Directory of Open Access Journals (Sweden)

    Katsuyasu Sakurai

    2013-10-01

    Full Text Available The rodent tactile vibrissae are innervated by several different types of touch sensory neurons. The central afferents of all touch neurons from one vibrissa collectively project to a columnar structure called a barrelette in the brainstem. Delineating how distinct types of sensors connect to second-order neurons within each barrelette is critical for understanding tactile information coding and processing. Using genetic and viral techniques, we labeled slowly adapting (SA mechanosensory neurons, rapidly adapting (RA mechanosensory neurons, afferent synapses, and second-order projection neurons with four different fluorescent markers to examine their connectivity. We discovered that within each vibrissa column, individual sensory neurons project collaterals to multiply distributed locations, inputs from SA and RA afferents are spatially intermixed without any discernible stereotypy or topography, and second-order projection neurons receive convergent SA and RA inputs. Our findings reveal a “one-to-many and many-to-one” connectivity scheme and the circuit architecture for tactile information processing at the first-order synapses.

  14. The brain’s response to pleasant touch: an EEG investigation of tactile caressing

    Directory of Open Access Journals (Sweden)

    Harsimrat eSingh

    2014-11-01

    Full Text Available Somatosensation as a proximal sense can have a strong impact on our attitude towards physical objects and other human beings. However, relatively little is known about how hedonic valence of touch is processed at the cortical level. Here we investigated the electrophysiological correlates of affective tactile sensation during caressing of the right forearm with pleasant and unpleasant textile fabrics. We show dissociation between more physically driven differential brain responses to the different fabrics in early somatosensory cortex – the well-known mu-suppression (10-20 Hz - and a beta-band response (25-30 Hz in presumably higher-order somatosensory areas in the right-hemisphere that correlated well with the subjective valence of tactile caressing. Importantly, when using single trial classification techniques, beta-power significantly distinguished between pleasant and unpleasant stimulation on a single trial basis with high accuracy. Our results therefore suggest a dissociation of the sensory and affective aspects of touch in the somatosensory system and may provide features that may be used for single trial decoding of affective mental states from simple electroencephalographic measurements.

  15. Towards enhancing click-draw based graphical passwords using multi-touch behaviours on smartphones

    DEFF Research Database (Denmark)

    Meng, Weizhi; Li, Wenjuan; Kwok, Lam For

    2017-01-01

    not only on PCs, but also on smartphones to authenticate legitimate users and detect impostors. However, as compared to common computers, we identify that users are able to perform some distinct actions like multi-touch on smartphones. The multi-touch is a distinguished feature on current smartphones....... In the evaluation, we develop a multi-touch enabled CD-GPS on smartphones and conduct two major experiments with a total of 90 participants. The study results indicate that participants are more likely to use multi-touch features to create their secrets, and multi-touch can make a positive impact on creating...

  16. Investigating Interaction Techniques for State-of-the-Art Smartwatches

    DEFF Research Database (Denmark)

    Kerber, Frederic; Kiefer, Tobias; Löchtefeld, Markus

    2016-01-01

    We present initial results from a comparative study targeting three different input techniques for smartwatches. We developed a prototype capable of two different mechanical input techniques, namely digital crown and rotatable bezel, as well as touch input. In a user study with 14 participants, we...... preference. Regarding task completion time, the rotatable bezel is significantly inferior to touch. In terms of error rate, no significant difference is observable. Overall, 9 of 14 participants preferred interaction with the digital crown....

  17. Intrinsic Low Hysteresis Touch Mode Capacitive Pressure Sensor

    DEFF Research Database (Denmark)

    Fragiacomo, Giulio; Pedersen, Thomas; Hansen, Ole

    2011-01-01

    Hysteresis has always been one of the main concerns when fabricating touch mode capacitive pressure sensors (TMCPS). This phenomenon can be fought at two different levels: during fabrication or after fabrication with the aid of a dedicated signal conditioning circuit. We will describe a microfabr......Hysteresis has always been one of the main concerns when fabricating touch mode capacitive pressure sensors (TMCPS). This phenomenon can be fought at two different levels: during fabrication or after fabrication with the aid of a dedicated signal conditioning circuit. We will describe...... a microfabrication step that can be introduced in order to reduce drastically the hysteresis of this type of sensors without compromising their sensitivity. Medium-high range (0 to 10 bar absolute pressure) TMCPS with a capacitive signal span of over 100pF and less than 1 % hysteresis in the entire pressure range...

  18. All-I-Touch as Combination of NFC and Lifestyle

    DEFF Research Database (Denmark)

    Kneissl, Fabian; Röttger, Richard; Sandner, Uwe

    2009-01-01

    For this paper we developed the concept and implemented a fully working prototype of a snowboarder community platform based on Near Field Communication. All-I-Touch is a service which provides product information at the point of sale and additionally connects the user with his social community...... in Facebook. Through this combination it is possible to increase incentives for the end user to use the service as well as the snowboard manufacturer to equip his products with NFC tags. The end user benefits from meaningful product information which is enriched with comments from his friends or arbitrary...... users through the connection to Facebook. This information is more likely to represent an independent impression of the product than the manufacturer's description and thus it is more valuable. On the other hand, manufacturers profit from All-I-Touch as a tool for Viral Marketing and benefit from...

  19. Developing Mixed Reality Educational Applications: The Virtual Touch Toolkit

    Science.gov (United States)

    Mateu, Juan; Lasala, María José; Alamán, Xavier

    2015-01-01

    In this paper, we present Virtual Touch, a toolkit that allows the development of educational activities through a mixed reality environment such that, using various tangible elements, the interconnection of a virtual world with the real world is enabled. The main goal of Virtual Touch is to facilitate the installation, configuration and programming of different types of technologies, abstracting the creator of educational applications from the technical details involving the use of tangible interfaces and virtual worlds. Therefore, it is specially designed to enable teachers to themselves create educational activities for their students in a simple way, taking into account that teachers generally lack advanced knowledge in computer programming and electronics. The toolkit has been used to develop various educational applications that have been tested in two secondary education high schools in Spain. PMID:26334275

  20. Multi-Touch Screen Interfaces And Gesture Analysis: A Study

    Directory of Open Access Journals (Sweden)

    Mrudula Nimbarte

    2011-12-01

    Full Text Available The way how we handle computers today will soon change. The future technology will allow us tointeract with the computer on different level from the current technology what we are used to. The toolssuch as the mouse and the keyboard need to communicate with the computer will slowly disappearand be replaced with more comfortable and more natural tools for the human being to use. That future isalready here. The rate of how touch screen hardware and applications are used is growing rapidlyand will break new r e c o r ds in n e a r f ut u r e . This new technology requires different ways ofdetecting inputs from the user - inputs which will be made out of on- screen gestures rather than byclicking of buttons or scrolling mouse wheels. In this paper we s tudied the gestures defined formulti-touch screen interfaces, the methods used to detect them and how they are passed on to otherapplications.

  1. Physics Learning Strategies with Multi-touch Technology

    Science.gov (United States)

    Potter, Mark; Ilie, C.; Schofield, D.

    2011-03-01

    Advancements in technology have opened doorways to build new teaching and learning methods. Through conjunctive use of these technologies and methods, a classroom can be enriched to stimulate and improve student learning. The purpose of our research is to ascertain whether or not multi-touch technology enhances students' abilities to better comprehend and retain the knowledge taught in physics. At their basis, students learn via visual, aural, reading/writing, and kinesthetic styles. Labs provide for all but the aural style, while lectures lack kinesthetic learning. Pedagogical research indicates that kinesthetic learning is a fundamental, powerful, and ubiquitous learning style. By using multi-touch technology in lecture, not only can we accommodate kinesthetic learners, but we can also enrich the experiences of visual learners. Ushering to this wider array of students will hopefully lead to an increase in meaningful learning.

  2. Developing Mixed Reality Educational Applications: The Virtual Touch Toolkit.

    Science.gov (United States)

    Mateu, Juan; Lasala, María José; Alamán, Xavier

    2015-08-31

    In this paper, we present Virtual Touch, a toolkit that allows the development of educational activities through a mixed reality environment such that, using various tangible elements, the interconnection of a virtual world with the real world is enabled. The main goal of Virtual Touch is to facilitate the installation, configuration and programming of different types of technologies, abstracting the creator of educational applications from the technical details involving the use of tangible interfaces and virtual worlds. Therefore, it is specially designed to enable teachers to themselves create educational activities for their students in a simple way, taking into account that teachers generally lack advanced knowledge in computer programming and electronics. The toolkit has been used to develop various educational applications that have been tested in two secondary education high schools in Spain.

  3. Human relationships: an exploration of loneliness and touch.

    Science.gov (United States)

    Playfair, Catherine

    The aim of this article is to provide a cursory review of some of the literature relating to loneliness, existentialism and touch. With reference to the critical incident analysis (see Box 1), a reflection on the learning that has been achieved both intrapersonally and interpersonally will also be provided. A consideration of how exactly this experience of structured reflection may be used to enhance and develop practice will also be explored. The review will analyze the key concepts of loneliness, existentialism, the therapeutic relationship and touch within the realms of nursing practice, specifically in relation to death and dying. This article seeks to highlight the importance of having an understanding of loneliness in nursing, particularly when caring for patients who are dying.

  4. Touch Receptors Undergo Rapid Remodeling in Healthy Skin

    Directory of Open Access Journals (Sweden)

    Kara L. Marshall

    2016-11-01

    Full Text Available Sensory tissues exposed to the environment, such as skin, olfactory epithelia, and taste buds, continuously renew; therefore, peripheral neurons must have mechanisms to maintain appropriate innervation patterns. Although somatosensory neurons regenerate after injury, little is known about how these neurons cope with normal target organ changes. To elucidate neuronal plasticity in healthy skin, we analyzed the structure of Merkel-cell afferents, which are gentle touch receptors, during skin remodeling that accompanies mouse hair-follicle regeneration. The number of Merkel cells is reduced by 90% and axonal arbors are simplified during active hair growth. These structures rebound within just days. Computational modeling predicts that Merkel-cell changes are probabilistic, but myelinated branch stability depends on Merkel-cell inputs. Electrophysiology and behavior demonstrate that tactile responsiveness is less reliable during active growth than in resting skin. These results reveal that somatosensory neurons display structural plasticity at the cost of impairment in the reliability of encoding gentle touch.

  5. Developing Mixed Reality Educational Applications: The Virtual Touch Toolkit

    Directory of Open Access Journals (Sweden)

    Juan Mateu

    2015-08-01

    Full Text Available In this paper, we present Virtual Touch, a toolkit that allows the development of educational activities through a mixed reality environment such that, using various tangible elements, the interconnection of a virtual world with the real world is enabled. The main goal of Virtual Touch is to facilitate the installation, configuration and programming of different types of technologies, abstracting the creator of educational applications from the technical details involving the use of tangible interfaces and virtual worlds. Therefore, it is specially designed to enable teachers to themselves create educational activities for their students in a simple way, taking into account that teachers generally lack advanced knowledge in computer programming and electronics. The toolkit has been used to develop various educational applications that have been tested in two secondary education high schools in Spain.

  6. The Hamilton-Jacobi theory for solving two-point boundary value problems: Theory and numerics with application to spacecraft formation flight, optimal control and the study of phase space structure

    Science.gov (United States)

    Guibout, Vincent M.

    This dissertation has been motivated by the need for new methods to address complex problems that arise in spacecraft formation design. As a direct result of this motivation, a general methodology for solving two-point boundary value problems for Hamiltonian systems has been found. Using the Hamilton-Jacobi theory in conjunction with the canonical transformation induced by the phase flow, it is shown that generating functions solve two-point boundary value problems. Traditional techniques for addressing these problems are iterative and require an initial guess. The method presented in this dissertation solves boundary value problems at the cost of a single function evaluation, although it requires knowledge of at least one generating function. Properties of this method are presented. Specifically, we show that it includes perturbation theory and generalizes it to nonlinear systems. Most importantly, it predicts the existence of multiple solutions and allows one to recover all of these solutions. To demonstrate the efficiency of this approach, an algorithm for computing the generating functions is proposed and its convergence properties are studied. As the method developed in this work is based on the Hamiltonian structure of the problem, particular attention must be paid to the numerics of the algorithm. To address this, a general framework for studying the discretization of certain dynamical systems is developed. This framework generalizes earlier work on discretization of Lagrangian and Hamiltonian systems on tangent and cotangent bundles respectively. In addition, it provides new insights into some symplectic integrators and leads to a new discrete Hamilton-Jacobi theory. Most importantly, it allows one to discretize optimal control problems. In particular, a discrete maximum principle is presented. This dissertation also investigates applications of the proposed method to solve two-point boundary value problems. In particular, new techniques for designing

  7. Multi-touch rotation gestures : performance and ergonomics

    OpenAIRE

    Hoggan, Eve; Williamson, John; Nacenta, Miguel; Kristensson, Per Ola; Lehtiö, Anu

    2013-01-01

    This work was supported by the Engineering and Physical Sciences Research Council (EP/H027408/1), the Scottish Informatics and Computer Science Alliance, Max Planck Center for Visual Computing and Communications, Academy of Finland, Emil Aaltonen Foundation, and the Department of Computer Science, University of Helsinki. Rotations performed with the index finger and thumb involve some of the most complex motor action among common multi-touch gestures, yet little is known about the factors ...

  8. Multi-Touch Interaction for Robot Command and Control

    Science.gov (United States)

    2010-12-01

    which the centroid of each “ blob ” created by the finger touches is identified. This process has reportedly allowed for high frame-rate interaction with...time reflects the total task time (Zhai, 2004). To ameliorate any latent learning effects, each subject was given a set of warm - up trials before each...experiment. The time of the warm -up trials was not recorded. After each block, the participants were allowed to rest. The presentation of the conditions

  9. Distinct neural networks underlying empathy for pleasant and unpleasant touch.

    Science.gov (United States)

    Lamm, Claus; Silani, Giorgia; Singer, Tania

    2015-09-01

    In spite of considerable progress in the understanding of the neural mechanisms underlying the experience of empathy, the majority of previous investigations have focused on how we share negative affective states (and in particular pain) of others, whereas only few studies have targeted empathy for positive emotions. This bias has precluded addressing one of the central tenets of the shared representations account of empathy, which is that different networks should be engaged when empathizing with emotions that are represented on different neural levels. The aim of the present study was to overcome this limitation and to test whether empathy for pleasant and unpleasant affective touch is underpinned by different neural networks. To this end we used functional magnetic resonance imaging (fMRI), with two independent replication experiments (N = 18, N = 32), and a novel paradigm enabling the joint investigation of first-hand and vicarious responses to pleasant and unpleasant affect induced via visuo-tactile stimulation. This revealed that empathy is subserved by distinct neural networks, with those regions recruited in the first-hand experience of positive or negative affective states also being specifically recruited when empathizing with these respective states in others. More specifically, the first-hand and vicarious experience of pleasant touch commonly recruited medial orbitofrontal cortex (OFC), while unpleasant touch was associated with shared activation in the right fronto-insular cortex. The observation that specifically tailored subsystems of the human brain are engaged to share positive versus negative touch of others brings fresh evidence to one of the major goals of the social neuroscience of empathy: to identify which specific aspects of the affective states of others are shared, and what role this plays in enabling the understanding of the emotions of others. Copyright © 2015 Elsevier Ltd. All rights reserved.

  10. iPod touch vs. TI-Nspire

    OpenAIRE

    Mann, Markus

    2012-01-01

    Im Rahmen eines Unterrichtsprojekts in der zehnten Jahrgangsstufe konnten Schüler zunächst für drei Monate mit einem iPod Touch (mit Mathematik-Apps) und später über mehrere Monate mit dem TI Nspire CAS arbeiten. Im Anschluss erfolgten Beurteilung und Vergleich beider Geräte durch die Schüler hinsichtlich ihrer Eignung für den Mathematikunterricht.

  11. Infant Imitation from Television Using Novel Touch Screen Technology

    Science.gov (United States)

    Zack, Elizabeth; Barr, Rachel; Gerhardstein, Peter; Dickerson, Kelly; Meltzoff, Andrew N.

    2009-01-01

    Infants learn less from a televised demonstration than from a live demonstration, the "video deficit effect." The present study employs a novel approach, using touch screen technology to examine 15-month olds' transfer of learning. Infants were randomly assigned either to within-dimension (2D/2D or 3D/3D) or cross-dimension (3D/2D or 2D/3D)…

  12. Bacteria contamination of touch surfaces in Polish hospital wards

    Directory of Open Access Journals (Sweden)

    Anna Różańska

    2017-08-01

    Full Text Available Background: The objective of the study has been to evaluate the pathogenic bacteria contamination of touch surfaces in hospital wards. Material and Methods: Samples were taken from frequently touched surfaces in the hospital environment in 13 units of various types. Culturing was carried out on solid blood agar and in growth broth (tryptic soy broth – TSB. Species identification was performed using the analytical profile index (API biochemical testing and confirmed with matrix assisted laser desorption ionization time-flight mass spectrometry (MALDI-TOF-MS system. Results: The total of 161 samples were taken for the study. Fifty-two of them, after 24 h of culture on a solid medium, demonstrated bacterial growth and further 60 samples had growth after prior multiplication in TSB. Overall, 69.6% of samples exhibited growth of 19 bacterial species. Pathogenic species – representing indicator organisms of efficiency of hospital cleaning – was demonstrated by 21.4% of samples. Among them Acinetobacter spp., Enterocococci spp. and Staphylococcus aureus were identified. Coagulase-negative staphylococci (CNS were predominant. The proportion of various groups of bacteria significantly varied in respective hospitals, and in various types of wards. Disturbing observation is a large proportion of resistance of isolated CNS strains as a potential reservoir of resistance genes. Conclusions: The results show that touch surfaces in hospital units are contaminated by both potentially pathogenic and pathogenic bacterial species. In connection with the reported, also in Poland, frequent omission or incorrect execution of hand hygiene by hospital staff, and probably patients, touch surfaces still constitute important reservoir of pathogenic bacteria. Improving hand hygiene compliance of health-care workers with recommendations is necessary for increasing biological safety of hospital environment. Med Pr 2017;68(3:459–467

  13. The planar two point algorithm

    NARCIS (Netherlands)

    O. Booij; Z. Zivkovic

    2009-01-01

    Vision-based localization, mapping and navigation is often performed by searching for corresponding image points and estimating the epipolar geometry. It is known that the possible relative poses of a camera mounted on a mobile robot that moves over a planar ground floor, has two degrees of freedom.

  14. Deaf, blind or deaf-blind: Is touch enhanced?

    Science.gov (United States)

    Papagno, Costanza; Cecchetto, Carlo; Pisoni, Alberto; Bolognini, Nadia

    2016-02-01

    When someone looses one type of sensory input, s/he may compensate by using the sensory information conveyed by other senses. To verify whether loosing a sense or two has consequences on a spared sensory modality, namely touch, and whether these consequences depend on the type of sensory loss, we investigated the effects of deafness and blindness on temporal and spatial tactile tasks in deaf, blind and deaf-blind people. Deaf and deaf-blind people performed the spatial tactile task better than the temporal one, while blind and controls showed the opposite pattern. Deaf and deaf-blind participants were impaired in temporal discrimination as compared to controls, while deaf-blind individuals outperformed blind participants in the spatial tactile task. Overall, sensory-deprived participants did not show an enhanced tactile performance. We speculate that discriminative touch is not so relevant in humans, while social touch is. Probably, more complex tactile tasks would have revealed an increased performance in sensory-deprived people.

  15. A closed-loop neurobotic system for fine touch sensing

    Science.gov (United States)

    Bologna, L. L.; Pinoteau, J.; Passot, J.-B.; Garrido, J. A.; Vogel, J.; Ros Vidal, E.; Arleo, A.

    2013-08-01

    Objective. Fine touch sensing relies on peripheral-to-central neurotransmission of somesthetic percepts, as well as on active motion policies shaping tactile exploration. This paper presents a novel neuroengineering framework for robotic applications based on the multistage processing of fine tactile information in the closed action-perception loop. Approach. The integrated system modules focus on (i) neural coding principles of spatiotemporal spiking patterns at the periphery of the somatosensory pathway, (ii) probabilistic decoding mechanisms mediating cortical-like tactile recognition and (iii) decision-making and low-level motor adaptation underlying active touch sensing. We probed the resulting neural architecture through a Braille reading task. Main results. Our results on the peripheral encoding of primary contact features are consistent with experimental data on human slow-adapting type I mechanoreceptors. They also suggest second-order processing by cuneate neurons may resolve perceptual ambiguities, contributing to a fast and highly performing online discrimination of Braille inputs by a downstream probabilistic decoder. The implemented multilevel adaptive control provides robustness to motion inaccuracy, while making the number of finger accelerations covariate with Braille character complexity. The resulting modulation of fingertip kinematics is coherent with that observed in human Braille readers. Significance. This work provides a basis for the design and implementation of modular neuromimetic systems for fine touch discrimination in robotics.

  16. The posterior parietal cortex remaps touch into external space.

    Science.gov (United States)

    Azañón, Elena; Longo, Matthew R; Soto-Faraco, Salvador; Haggard, Patrick

    2010-07-27

    Localizing tactile events in external space is required for essential functions such as orienting, haptic exploration, and goal-directed action in peripersonal space. In order to map somatosensory input into a spatiotopic representation, information about skin location must be integrated with proprioceptive information about body posture. We investigated the neural bases of this tactile remapping mechanism in humans by disrupting neural activity in the putative human homolog of the monkey ventral intraparietal area (hVIP), within the right posterior parietal cortex (rPPC), which is thought to house external spatial representations. Participants judged the elevation of touches on their (unseen) forearm relative to touches on their face. Arm posture was passively changed along the vertical axis, so that elevation judgments required the use of an external reference frame. Single-pulse transcranial magnetic stimulation (TMS) over the rPPC significantly impaired performance compared to a control site (vertex). Crucially, proprioceptive judgments of arm elevation or tactile localization on the skin remained unaffected by rPPC TMS. This selective disruption of tactile remapping suggests a distinct computational process dissociable from pure proprioceptive and somatosensory localization. Furthermore, this finding highlights the causal role of human PPC, putatively VIP, in remapping touch into external space.

  17. The C. elegans touch response facilitates escape from predacious fungi.

    Science.gov (United States)

    Maguire, Sean M; Clark, Christopher M; Nunnari, John; Pirri, Jennifer K; Alkema, Mark J

    2011-08-09

    Predator-prey interactions are vital determinants in the natural selection of behavioral traits. Gentle touch to the anterior half of the body of Caenorhabditis elegans elicits an escape response in which the animal quickly reverses and suppresses exploratory head movements [1, 2]. Here, we investigate the ecological significance of the touch response in predator-prey interactions between C. elegans and predacious fungi that catch nematodes using constricting hyphal rings. We show that the constricting rings of Drechslerella doedycoides catch early larval stages with a diameter similar to the trap opening. There is a delay between the ring entry and ring closure, which allows the animal to withdraw from the trap before being caught. Mutants that fail to suppress head movements in response to touch are caught more efficiently than the wild-type. This demonstrates that the coordination of motor programs allows C. elegans to smoothly retract from a fungal noose and evade capture. Our results suggest that selective pressures imposed by predacious fungi have shaped the evolution of C. elegans escape behavior.

  18. A touching compassion: Dürer’s haptic theology

    Directory of Open Access Journals (Sweden)

    Shira Brisman

    2015-02-01

    Full Text Available In one of the final scenes of his 1511 woodcut sequence, The Small Passion, Albrecht Dürer depicts the newly risen Christ extending his forefinger towards the head of Mary Magdalen. As a moment of touching, the Noli me tangere belongs to a category of representations that attests to the indexical nature of Christ’s image. The stain of his face on Veronica’s cloth or the imprints of his feet on the mountain from which he ascended are testaments to his corporeal presence on earth. Throughout The Small Passion, Dürer expands the vocabulary of indexical transfer to a haptic theology and proves the suitability of prints as a language in which to tell the story of God’s mark on earth in the form of Christ. Yet, at the same time, subtle underminings of these moments of contact signal Christ’s touch as impermanent, a substitute for a more sustained embrace to come. In emphasising the transmission and dissemination of Christ’s contact through a visual vocabulary of touching, pressing, hugging and kissing, Dürer also finds a language with which to describe the process of printing itself and the power – and limitations – of a medium both widely reproducible and constrained in its durability as a corporeal substitute.

  19. Evaluation of the safety and usability of touch gestures in operating in-vehicle information systems with visual occlusion.

    Science.gov (United States)

    Kim, Huhn; Song, Haewon

    2014-05-01

    Nowadays, many automobile manufacturers are interested in applying the touch gestures that are used in smart phones to operate their in-vehicle information systems (IVISs). In this study, an experiment was performed to verify the applicability of touch gestures in the operation of IVISs from the viewpoints of both driving safety and usability. In the experiment, two devices were used: one was the Apple iPad, with which various touch gestures such as flicking, panning, and pinching were enabled; the other was the SK EnNavi, which only allowed tapping touch gestures. The participants performed the touch operations using the two devices under visually occluded situations, which is a well-known technique for estimating load of visual attention while driving. In scrolling through a list, the flicking gestures required more time than the tapping gestures. Interestingly, both the flicking and simple tapping gestures required slightly higher visual attention. In moving a map, the average time taken per operation and the visual attention load required for the panning gestures did not differ from those of the simple tapping gestures that are used in existing car navigation systems. In zooming in/out of a map, the average time taken per pinching gesture was similar to that of the tapping gesture but required higher visual attention. Moreover, pinching gestures at a display angle of 75° required that the participants severely bend their wrists. Because the display angles of many car navigation systems tends to be more than 75°, pinching gestures can cause severe fatigue on users' wrists. Furthermore, contrary to participants' evaluation of other gestures, several participants answered that the pinching gesture was not necessary when operating IVISs. It was found that the panning gesture is the only touch gesture that can be used without negative consequences when operating IVISs while driving. The flicking gesture is likely to be used if the screen moving speed is slower or

  20. True Three-Dimension Touch Method for Orientation and Recognition Based on Optics%基于光学的真三维触控定位与识别方法研究

    Institute of Scientific and Technical Information of China (English)

    田晶; 田丰; 凌晨; 王鹤; 张文俊

    2013-01-01

    A two-point touch method for three-dimension space is proposed through introducing true three-dimension display and unmarked spatial orientation,while a two-point touch for true three-dimension display system is built. Interactive approach,which offers the solution of spatial orientation,tracking and gesture recognition,has been considered. Demonstrated in the experiments,optical-based two-point touch system meets the needs of human-computer interaction without any markers and sensors and changes of ambient light does not interfere with the operation of the human-computer interaction.%通过介绍真三维显示技术与无标记空间定位原理,提出了真三维两点触控实现方法,搭建了真三维两点触控定位与识别系统.针对真三维空间定位绘制、空间两点跟踪和手势识别问题,研究了真三维两点触控交互方法.实验证明,在不需要佩戴任何标记和传感器的条件下,基于光学的空间两点触控方法与系统能够满足真三维显示的人机交互要求,且环境光的变化不干扰人机交互的操作.

  1. Integrating 2D Mouse Emulation with 3D Manipulation for Visualizations on a Multi-Touch Table

    NARCIS (Netherlands)

    Vlaming, Luc; Collins, Christopher; Hancock, Mark; Nacenta, Miguel; Isenberg, Tobias; Carpendale, Sheelagh

    2010-01-01

    We present the Rizzo, a multi-touch virtual mouse that has been designed to provide the fine grained interaction for information visualization on a multi-touch table. Our solution enables touch interaction for existing mouse-based visualizations. Previously, this transition to a multi-touch environm

  2. The method to touch keys in piano performance%论钢琴演奏的触键方法

    Institute of Scientific and Technical Information of China (English)

    杨扬

    2014-01-01

    钢琴触键是表达音乐最重要的因素之一,运用丰富多彩的触键,是钢琴演奏者必须掌握的基本技巧,如何正确的掌握钢琴触键技巧,使钢琴的声音丰满圆润,为钢琴作品的表现更好地服务,使内心情感的表达更加丰富,是每个钢琴学生要引起重视的问题。%Piano touching is one of the most important factors of music expression, using rich and colorful touch keys, is the basic skill of piano player must master, how to correctly grasp the piano technique of touching keys, so that the sound of the piano is round, better serve for piano performance, so that the expression of feelings is more rich, each piano students to pay attention to the problem.

  3. Two-point spin-1/2-spin-1/2 sl(2,bfC) conformal Kac-Moody blocks on the torus and their monodromies

    Energy Technology Data Exchange (ETDEWEB)

    Smyrnakis, J.M. [Columbia Univ., New York, NY (United States). Dept. of Mathematics

    1995-10-02

    Two issues of the SU(2) Wess-Zumino-Witten model are examined here, namely the computation of the untwisted conformal Kac-Moody blocks on the torus and their monodromy representations. Using the free field representation developed by Bernard and Felder, an integral representation of the twisted two point spin-1/2-spin-1/2 conformal Kac-Moody blocks on the torus is computed. From this, an integral representation of the untwisted blocks is computed after careful removal of infinities. Finally, the untwisted blocks are used to get a representation of the Braid Group on the torus on two strings, in terms of quantum group q-numbers. (orig.).

  4. Clinical value and impact factors of virtual touch tissue quantification techniques in evaluating benign and malignant thyroid nodules%声触诊组织定量技术鉴别甲状腺良恶性结节影响因素的研究

    Institute of Scientific and Technical Information of China (English)

    宁春平; 徐丽华; 房世保; 孙咏梅; 王建红

    2014-01-01

    目的 探讨声触诊组织定量(VTQ)技术鉴别甲状腺良恶性结节的临床价值及其影响因素.方法 回顾性分析210例共240个甲状腺结节的二维、彩色多普勒及VTQ图像,记录检查切面及结节最大径、内部血流、钙化及距离皮肤的深度,并测量横向剪切波速度(SWV),采用ROC曲线方法计算VTQ鉴别甲状腺良、恶性结节的价值,采用多元线性回归方法分析结节最大径、钙化、内部血流、距离皮肤的深度及扫查切面、病理类型对SWV值的影响.结果 VTQ技术鉴别甲状腺良恶性结节的灵敏性为74.8%,特异性为73.4%,曲线下面积为0.799.多元线性逐步回归分析显示,结节的最大径、病理类型及内部血流与SWV值相关(P<0.05),其中病理类型对SWV值的影响最大(标准化回归系数为-0.312).而微钙化、结节的深度、扫查切面对SWV值无明显影响(P>0.05).结论 VTQ技术能定量提供甲状腺组织的硬度信息,在甲状腺良恶性结节鉴别诊断方面具有一定的价值.甲状腺结节的病理类型、内部血流及最大径是SWV值的影响因素,而结节距离皮肤的深度、扫查切面及微钙化与SWV值无关.%Objective To explore the value of virtual touch tissue quantification (VTQ) elastography and its influencing factors in identifying benign and malignant thyroid nodules.Methods A retrospective analysis was conducted in 210 cases of 240 thyroid nodules.Their images,including 2D ultrasound,color Doppler flow imaging (CDFI) and VTQ elastography,were reviewed,and the scanning view,the maximum diameter of the nodule,inside blood flow,calcifications and its depth beneath the skin were recorded.The value of shear wave velocity(SWV) in identifying benign and malignant thyroid nodules was calculated using receiver operating characteristic (ROC) curve.The influences of the maximum diameter of the nodules,calcifications,internal blood flow,the depth beneath skin and scanning views as well as

  5. Analysis of Microbiome DNA on Frequently Touched Items and from Palm Prints

    Directory of Open Access Journals (Sweden)

    Xue Yao

    2016-01-01

    Full Text Available Limited by the sensitivity of laboratory techniques, conventional human DNA analysis of touch DNA on frequently used items and prints does not always provide satisfactory results. In this study, microbiome DNA on personal computers, cell phones, and palm prints was analyzed and compared. After sample collection, DNA extraction, polymerase chain reaction amplification, library preparation, and sequencing, data were analyzed using the QIIME 1.8.0 software. Weighted unifrac distance between the right palm skin and the right side of a keyboard, the right palm skin and the mouse, and the left side of the keyboard and the left palm skin was 0.258850, 0.265474, and 0.214098, respectively. Even after palm prints were left for 1 week, microbial community structures were still quite similar to those of samples collected from the palm skin on the day they were left (weighted unifrac distance was 0.270885.

  6. Automated two-point dixon screening for the evaluation of hepatic steatosis and siderosis: comparison with R2*-relaxometry and chemical shift-based sequences

    Energy Technology Data Exchange (ETDEWEB)

    Henninger, B.; Rauch, S.; Schocke, M.; Jaschke, W.; Kremser, C. [Medical University of Innsbruck, Department of Radiology, Innsbruck (Austria); Zoller, H. [Medical University of Innsbruck, Department of Internal Medicine, Innsbruck (Austria); Kannengiesser, S. [Siemens AG, Healthcare Sector, MR Applications Development, Erlangen (Germany); Zhong, X. [Siemens Healthcare, MR R and D Collaborations, Atlanta, GA (United States); Reiter, G. [Siemens AG, Healthcare Sector, MR R and D Collaborations, Graz (Austria)

    2015-05-01

    To evaluate the automated two-point Dixon screening sequence for the detection and estimated quantification of hepatic iron and fat compared with standard sequences as a reference. One hundred and two patients with suspected diffuse liver disease were included in this prospective study. The following MRI protocol was used: 3D-T1-weighted opposed- and in-phase gradient echo with two-point Dixon reconstruction and dual-ratio signal discrimination algorithm (''screening'' sequence); fat-saturated, multi-gradient-echo sequence with 12 echoes; gradient-echo T1 FLASH opposed- and in-phase. Bland-Altman plots were generated and correlation coefficients were calculated to compare the sequences. The screening sequence diagnosed fat in 33, iron in 35 and a combination of both in 4 patients. Correlation between R2* values of the screening sequence and the standard relaxometry was excellent (r = 0.988). A slightly lower correlation (r = 0.978) was found between the fat fraction of the screening sequence and the standard sequence. Bland-Altman revealed systematically lower R2* values obtained from the screening sequence and higher fat fraction values obtained with the standard sequence with a rather high variability in agreement. The screening sequence is a promising method with fast diagnosis of the predominant liver disease. It is capable of estimating the amount of hepatic fat and iron comparable to standard methods. (orig.)

  7. Effects of Gentle Human Touch and Field Massage on Urine Cortisol Level in Premature Infants: A Randomized, Controlled Clinical Trial

    Science.gov (United States)

    Asadollahi, Malihe; Jabraeili, Mahnaz; Mahallei, Majid; Asgari Jafarabadi, Mohammad; Ebrahimi, Sakine

    2016-01-01

    Introduction: Hospitalization in neonatal intensive care unit may leads to many stresses for premature infants. Since premature infants cannot properly process stressors, identifying interventions that reduce the stress level for them is seems necessary. The aim of present study was to compare the effects of Field massage and Gentle Human Touch (GHT) techniques on the urine level of cortisol, as an indicator of stress in preterm infants. Methods: This randomized, controlled clinical trial was carried out in Al-Zahra hospital, Tabriz. A total of 84 premature infants were randomly assigned into three groups. First groups were touched by their mothers three times a day (15 minutes in each session) for 5 days by GHT technique. The second group was received 15 minutes Field massage with sunflower oil three times a day by their mothers for 5 days. The third group received routine care. In all groups, 24-hours urine samples were collected in the first and sixth day after the intervention and analyzed for cortisol level. Data were analyzed by SPSS software. Results: There were significant differences between mean of changes in cortisol level between GHT and control groups and Field massage and control groups (0.026). Conclusion: Although the massage with Field technique resulted in a significant reduction in blood cortisol level, but the GHT technique have also a similar effect. So, both methods are recommended for decreasing of stress in preterm infants. PMID:27752484

  8. iOS Development using MonoTouch Cookbook

    CERN Document Server

    Tavlikos, Dimitris

    2011-01-01

    The book is written in a cookbook style, presenting examples in the style of recipes, allowing you to go directly to your topic of interest, or follow topics throughout a chapter to gain in-depth knowledge. This book is essential for C# and .NET developers with no previous experience in iOS development and Objective-C developers that want to make a transition to the benefits of MonoTouch and the C# language, for creating complete, compelling iPhone, iPod and iPad applications and deploying them to the App Store.

  9. Nikishin systems are perfect. Case of unbounded and touching supports

    CERN Document Server

    Prieto, Fidalgo; Lagomasino, G López

    2010-01-01

    K. Mahler introduced the concept of perfect systems in the theory of simultaneous Hermite-Pad\\'{e} approximation of analytic functions. Recently, we proved that Nikishin systems, generated by measures with bounded support and non-intersecting consecutive supports contained on the real line, are perfect. Here, we prove that they are also perfect when the supports of the generating measures are unbounded or touch at one point. As an application, we give a version of Stieltjes' theorem in the context of simultaneous Hermite-Pad\\'e approximation.

  10. Touch the World - and communicate the experience via Mobile Phones

    DEFF Research Database (Denmark)

    Bang, Jørgen; Dalsgaard, Christian; Engelbrecht, Kristian

    2009-01-01

    as a vehicle to enhance pupil’s learning by making their own documentation of their experiences and by communicating these experiences to fellow pupils. We argue that mobile phones have a potential to support these learning processes as a personalised tool for documentation and communication.......The paper presents a project involving school children’s use of mobile phones at Moesgaard Museum, in Aarhus, Denmark. A special anthropological exhibition called “Touch the World” is arranged around items supplied by UNESCO. The paper will discuss the pedagogical perspective of using mobile phones...

  11. Touch the World - and communicate the experience via Mobile Phones

    DEFF Research Database (Denmark)

    Bang, Jørgen; Dalsgaard, Christian; Engelbrecht, Kristian

    2009-01-01

    as a vehicle to enhance pupil’s learning by making their own documentation of their experiences and by communicating these experiences to fellow pupils. We argue that mobile phones have a potential to support these learning processes as a personalised tool for documentation and communication.......The paper presents a project involving school children’s use of mobile phones at Moesgaard Museum, in Aarhus, Denmark. A special anthropological exhibition called “Touch the World” is arranged around items supplied by UNESCO. The paper will discuss the pedagogical perspective of using mobile phones...

  12. Surface matching method for profile inspection with touch probe

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    This paper presents an efficient method for rigid registration of 3-D point sets,which intends to match the feature points inspected using touch probe with the points on designed CAD surface.The alignment error is defined as the least square problem,and the sphere radius of the inspection probe is considered.In this framework,the matching problem is converted into acquiring six Euler variables problem by solving nonlinear equations.Thus,a matrix transformation of parameter separation is presented to get the...

  13. Control4 Portable WiFi Touch Screen

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Control4提供了智能家居中的一站式控制方案,包括家庭自动化、背景音乐以及家庭影院等娱乐系统的控制,这款Portable WiFi Touch Screen控制器采用无线网络的连接方式,控制面板可以随时随地带在身边,同时它还提供了多个操作页面.

  14. Methodology to Assess No Touch Audit Software Using Field Data

    Energy Technology Data Exchange (ETDEWEB)

    Cai, Jie; Braun, James E.; Langner, M. Rois

    2016-10-01

    The research presented in this report builds upon these previous efforts and proposes a set of tests to assess no touch audit tools using real utility bill and on-site data. The proposed assessment methodology explicitly investigates the behaviors of the monthly energy end uses with respect to outdoor temperature, i.e., the building energy signature, to help understand the Tool's disaggregation accuracy. The project team collaborated with Field Diagnosis Services, Inc. (FDSI) to identify appropriate test sites for the evaluation.

  15. Object recognition - Convergence of vision, audition, and touch

    DEFF Research Database (Denmark)

    Kassuba, Tanja

    ). It is known that in multisensory binding, the modality providing the most reliable input dominates the resulting percept (Ernst & Banks, 2002). However, little attention has been directed towards putative intrinsic asymmetries between the senses in their contribution to multisensory binding (i.e., despite...... magnetic resonance imaging (fMRI), diffusion tensor imaging (DTI), and repetitive transcranial magnetic stimulation (rTMS). The following research questions were addressed: 1. Where in the human brain does object recognition converge across vision, audition, and touch? 2. How is audio-haptic object...

  16.  HOMEinTOUCH Designing two-way Ambient Communication

    DEFF Research Database (Denmark)

    Petersen, Marianne Graves; Hansen, Aviaja Borup; Nielsen, Kaspar Rosengreen

    2008-01-01

    Digital Picture Frames has received attention both research wise and by consumers, who are increasingly buying existing solutions. In this paper we investigate how to design improved picture frames through providing means for two-way communication and through exploring the potential in providing...... automatically generated context information. We report on the design and trial use of a HOMEinTOUCH, an experience prototype of a picture frame for domestic environment, supporting two-way communication and context-information around pictures. We tested this prototype, as well as two other commercial products...

  17. The Benefits of Single-Touch Screens in Intersubjective Meaning Making

    DEFF Research Database (Denmark)

    Davidsen, Jacob; Christiansen, Ellen Tove

    2013-01-01

    What are the benefits of single-touch screens? The paper presents findings of one video extract from ten months of observation of single-touch screen interaction among 8-9 year-old children. Recent studies of collaborative learning mediated by digital touch screens and tabletops emphasize...... the possibilities for equal levels of verbal and physical participation.Additionally, these studies suggest that multi-touch technologies offer more task-oriented activities compared to single-touch screen interaction, in which discussion about turn-taking is more prevalent from the outset. In contrast, applying...... the Embodied Interaction Analysis, we find that the constraints of single-touch screens offer support for intersubjective meaning making in their capacity of constraining the interaction. This “grain of sand” shows how children display and construct a shared work space through embodied interaction...

  18. Goal-Role Integration as Driver for Customer Engagement Behaviours across Touch-points

    DEFF Research Database (Denmark)

    Haurum, Helle; Beckmann, Suzanne C.

    Customers and firms interact at many different touch-points that enable customer engagement behaviour. By adopting a customer-centric approach we investigated through 20 in-depth interviews what drives service customers’ CEB manifestations in touch-points, which the firm either manages, monitors......, or manoeuvres between. The key findings are that (a) CEBs are driven by different forms of goal-role integration across touch-points, (b) customers’ goal-directedness determines the touch-points where CEBs are manifested, (c) customers’ role-playing behaviours determine the nature of CEBs, and (d) customers......’ role-playing behaviours can change across touch-points, contingent upon goal-directedness. Hence, this study provides rich insights into customer-firm encounters at touch-points, which subsequently define and shape the relation over time....

  19. What Use Do Multi-Touch Mobile Devices Have in Workplace Learning?

    OpenAIRE

    Nabeel Ahmad

    2008-01-01

    Mobile devices have taken the consumer and commercial industry by storm over the past few years. In the workplace, many professionals are equipped with a mobile device that allows them to keep in touch with their work no matter where they are. Multi-touch devices are the latest additions into the mobile device realm. This article primarily focuses on how multi-touch mobile devices can be used to enhance mobile learning capabilities in the workplace.

  20. On the existence of touch points for first-order state inequality constraints

    Science.gov (United States)

    Seywald, Hans; Cliff, Eugene M.

    1993-01-01

    The appearance of touch points in state constrained optimal control problems with general vector-valued control is studied. Under the assumption that the Hamiltonian is regular, touch points for first-order state inequalities are shown to exist only under very special conditions. In many cases of practical importance these conditions can be used to exclude touch points a priori without solving an optimal control problem. The results are demonstrated on a simple example.

  1. What Use Do Multi-Touch Mobile Devices Have in Workplace Learning?

    Directory of Open Access Journals (Sweden)

    Nabeel Ahmad

    2008-08-01

    Full Text Available Mobile devices have taken the consumer and commercial industry by storm over the past few years. In the workplace, many professionals are equipped with a mobile device that allows them to keep in touch with their work no matter where they are. Multi-touch devices are the latest additions into the mobile device realm. This article primarily focuses on how multi-touch mobile devices can be used to enhance mobile learning capabilities in the workplace.

  2. Laser-assisted fabrication of single-layer flexible touch sensor

    OpenAIRE

    2016-01-01

    Single-layer flexible touch sensor that is designed for the indium-tin-oxide (ITO)-free, bendable, durable, multi-sensible, and single layer transparent touch sensor was developed via a low-cost and one-step laser-induced fabrication technology. To this end, an entirely novel approach involving material, device structure, and even fabrication method was adopted. Conventional metal oxides based multilayer touch structure was substituted by the single layer structure composed of integrated silv...

  3. Determination of minimum impact parameter by modified touching spheres schemes for intermediate energy Coulomb excitation experiments

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, Rajiv; Sharma, Shagun [DAV University, Physics Department, Jalandhar (India); Singh, Pradeep [Deenbandhu Chhotu Ram University of Science and Technology, Department of Physics, Murthal (India); Kharab, Rajesh [Kurukshetra University, Department of Physics, Kurukshetra (India)

    2016-02-15

    The energy-independent touching spheres schemes commonly used for the determination of the safe minimum value of the impact parameter for Coulomb excitation experiments are modified through the inclusion of an energy-dependent term. The touching spheres+3fm scheme after modification emerges out to be the best one while touching spheres+4fm scheme is found to be better in its unmodified form. (orig.)

  4. GPU Pro advanced rendering techniques

    CERN Document Server

    Engel, Wolfgang

    2010-01-01

    This book covers essential tools and techniques for programming the graphics processing unit. Brought to you by Wolfgang Engel and the same team of editors who made the ShaderX series a success, this volume covers advanced rendering techniques, engine design, GPGPU techniques, related mathematical techniques, and game postmortems. A special emphasis is placed on handheld programming to account for the increased importance of graphics on mobile devices, especially the iPhone and iPod touch.Example programs and source code can be downloaded from the book's CRC Press web page. 

  5. Development of a two-step touch method for website navigation on smartphones.

    Science.gov (United States)

    Jung, Kihyo; Jang, Jinah

    2015-05-01

    The touch method for hyperlink selection in smartphones can often create usability problems because a hyperlink is universally smaller than a finger contact area as well as visually occluded by a finger while pressing. In this study, we developed a two-step touch method (called Press and Flick method) and comprehensively examined its effectiveness using the goals, operators, methods, and selection rules (GOMS) model and user testing. The two-step touch method consisted of finger press and flick motions; a target hyperlink was selected by a finger press motion, and a finger flick method was subsequently conducted for error correction if the initial interaction (press) failed. We compared the two-step touch method with the current touch method through the GOMS model and user testing. As a result, the two-step touch method was significantly superior to the current touch method in terms of error rate and subjective satisfaction score; however, its superiority in terms of number of interactions and touch time was vulnerably affected by error rate. The two-step touch method developed in this study can improve the usability and user experience of website navigation using smartphones.

  6. The Neurobiology Shaping Affective Touch: Expectation, Motivation, and Meaning in the Multisensory Context.

    Science.gov (United States)

    Ellingsen, Dan-Mikael; Leknes, Siri; Løseth, Guro; Wessberg, Johan; Olausson, Håkan

    2015-01-01

    Inter-individual touch can be a desirable reward that can both relieve negative affect and evoke strong feelings of pleasure. However, if other sensory cues indicate it is undesirable to interact with the toucher, the affective experience of the same touch may be flipped to disgust. While a broad literature has addressed, on one hand the neurophysiological basis of ascending touch pathways, and on the other hand the central neurochemistry involved in touch behaviors, investigations of how external context and internal state shapes the hedonic value of touch have only recently emerged. Here, we review the psychological and neurobiological mechanisms responsible for the integration of tactile "bottom-up" stimuli and "top-down" information into affective touch experiences. We highlight the reciprocal influences between gentle touch and contextual information, and consider how, and at which levels of neural processing, top-down influences may modulate ascending touch signals. Finally, we discuss the central neurochemistry, specifically the μ-opioids and oxytocin systems, involved in affective touch processing, and how the functions of these neurotransmitters largely depend on the context and motivational state of the individual.

  7. Empathy during consoling touch is modulated by mu-rhythm: An EEG study.

    Science.gov (United States)

    Peled-Avron, L; Goldstein, P; Yellinek, S; Weissman-Fogel, I; Shamay-Tsoory, S G

    2017-04-22

    The aim of the present study was to examine the mechanisms of empathy for pain that contribute to consoling touch, a distress-alleviating contact behavior carried out by an observer in response to the suffering of a target. We tested romantic couples in a paradigm that involves consoling touch and examined the attenuation of the mu/alpha rhythm (8-13Hz) in the consoling partner. During the task, the toucher either held the consoled partner's right hand (human touch) or held onto the armrest of the chair (non-human touch), while the consoled partner experienced inflicted pain (pain condition) or did not experience any pain (no-pain condition). In accordance with our hypotheses, the results revealed an interaction between touch and pain at in mu/alpha rhythms in all central sites (C3, C4, Cz). Specifically, we found that the toucher's mu suppression was higher in the consoling touch condition, i.e., while touching the partner who is in pain, compared to the three control conditions. Additionally, we found that in the consoling touch condition, mu suppression at electrode C4 of the toucher correlated with a measure of situational empathy. Our findings suggest that electrophysiological and behavioral measures that have been associated with empathy for pain are modulated during consoling touch. Copyright © 2017 Elsevier Ltd. All rights reserved.

  8. The neurobiology shaping affective touch: Expectation, motivation, and meaning in the multisensory context

    Directory of Open Access Journals (Sweden)

    Dan-Mikael eEllingsen

    2016-01-01

    Full Text Available Inter-individual touch can be a desirable reward that can both relieve negative affect and evoke strong feelings of pleasure. However, if other sensory cues indicate it is undesirable to interact with the toucher, the affective experience of the same touch may be flipped to disgust. While a broad literature has addressed, on one hand the neurophysiological basis of ascending touch pathways, and on the other hand the central neurochemistry involved in touch behaviors, investigations of how external context and internal state shapes the hedonic value of touch have only recently emerged. Here, we review the psychological and neurobiological mechanisms responsible for the integration of tactile bottom-up stimuli and top-down information into affective touch experiences. We highlight the reciprocal influences between gentle touch and contextual information, and consider how, and at which levels of neural processing, top-down influences may modulate ascending touch signals. Finally, we discuss the central neurochemistry, specifically the µ-opioids and oxytocin systems, involved in affective touch processing, and how the functions of these neurotransmitters largely depend on the context and motivational state of the individual.

  9. Analysis of touch used by occupational therapy practitioners in skilled nursing facilities.

    Science.gov (United States)

    Morris, Douglas; Henegar, J; Khanin, S; Oberle, G; Thacker, S

    2014-09-01

    Instrumental touch is identified as having purposeful physical contact in order to complete a task. Expressive touch is identified as warm, friendly physical contact and is not solely for performing a task. Expressive touch has been associated with improved client status, increased rapport and greater gains made during therapy. The purpose of the study was to observe the frequency of expressive and instrumental touch utilized by an occupational therapist during an occupational therapy session. Thirty-three occupational therapy professionals, including occupational therapists and occupational therapy assistants, employed at skilled nursing facilities in southwest Florida were observed. Data were collected on the Occupational Therapy Interaction Assessment. The results of the data analysis showed a positive relationship between the gender of the therapist and the frequency of expressive touch. The data also showed that a large majority of touches were instrumental touch and pertained to functional mobility. The results of the study can contribute to a better understanding of the holistic aspects of occupational therapy. By the use of more expressive touch, occupational therapy practitioners may have a positive, beneficial effect on both the client and the therapy process as a whole. Further research is needed to determine the effect an occupational therapy setting has on the frequency of instrumental and expressive touch. A larger sample size and a distinction between evaluation and treatment sessions would benefit future studies. Copyright © 2014 John Wiley & Sons, Ltd.

  10. How the brain codes intimacy: The neurobiological substrates of romantic touch.

    Science.gov (United States)

    Kreuder, Ann-Kathrin; Scheele, Dirk; Wassermann, Lea; Wollseifer, Michael; Stoffel-Wagner, Birgit; Lee, Mary R; Hennig, Juergen; Maier, Wolfgang; Hurlemann, René

    2017-09-01

    Humans belong to a minority of mammalian species that exhibit monogamous pair-bonds, thereby enabling biparental care of offspring. The high reward value of interpersonal closeness and touch in couples is a key proximate mechanism facilitating the maintenance of enduring romantic bonds. However, surprisingly, the neurobiological underpinnings mediating the unique experience of a romantic partner's touch remain unknown. In this randomized placebo (PLC)-controlled, between-group, pharmacofunctional magnetic resonance imaging (fMRI) study involving 192 healthy volunteers (96 heterosexual couples), we intranasally administered 24 IU of the hypothalamic peptide oxytocin (OXT) to either the man or the woman. Subsequently, we scanned the subjects while they assumed that they were being touched by their romantic partners or by an unfamiliar person of the opposite sex, although in reality an identical pattern of touch was always given by the same experimenter. Our results show that intranasal OXT compared to PLC selectively enhanced the subjective pleasantness of the partner's touch. Importantly, intranasal OXT selectively increased responses to partner touch in the nucleus accumbens (NAcc) and anterior cingulate cortex. Under OXT, NAcc activations to partner touch positively correlated with the subjects' evaluation of their relationship quality. Collectively, our results suggest that OXT may contribute to the maintenance of monogamous relationships in humans by concomitantly increasing the reward value of partner touch and diminishing the hedonic quality of stranger touch. Hum Brain Mapp 38:4525-4534, 2017. © 2017 Wiley Periodicals, Inc. © 2017 Wiley Periodicals, Inc.

  11. Increased recovery of touch DNA evidence using FTA paper compared to conventional collection methods.

    Science.gov (United States)

    Kirgiz, Irina A; Calloway, Cassandra

    2017-04-01

    Tape lifting and FTA paper scraping methods were directly compared to traditional double swabbing for collecting touch DNA from car steering wheels (n = 70 cars). Touch DNA was collected from the left or right side of each steering wheel (randomized) using two sterile cotton swabs, while the other side was sampled using water-soluble tape or FTA paper cards. DNA was extracted and quantified in duplicate using qPCR. Quantifiable amounts of DNA were detected for 100% of the samples (n = 140) collected independent of the method. However, the DNA collection yield was dependent on the collection method. A statistically significant difference in DNA yield was observed between FTA scraping and double swabbing methods (p = 0.0051), with FTA paper collecting a two-fold higher amount. Statistical analysis showed no significant difference in DNA yields between the double swabbing and tape lifting techniques (p = 0.21). Based on the DNA concentration required for 1 ng input, 47% of the samples collected using FTA paper would be expected to yield a short tandem repeat (STR) profile compared to 30% and 23% using double swabbing or tape, respectively. Further, 55% and 77% of the samples collected using double swabbing or tape, respectively, did not yield a high enough DNA concentration for the 0.5 ng of DNA input recommended for conventional STR kits and would be expected to result in a partial or no profile compared to 35% of the samples collected using FTA paper. STR analysis was conducted for a subset of the higher concentrated samples to confirm that the DNA collected from the steering wheel was from the driver. 32 samples were selected with DNA amounts of at least 1 ng total DNA (100 pg/μl when concentrated if required). A mixed STR profile was observed for 26 samples (88%) and the last driver was the major DNA contributor for 29 samples (94%). For one sample, the last driver was the minor DNA contributor. A full STR profile of the last driver was observed for

  12. Dynamics of single photon transport in a one-dimensional waveguide two-point coupled with a Jaynes-Cummings system

    Science.gov (United States)

    Wang, Yuwen; Zhang, Yongyou; Zhang, Qingyun; Zou, Bingsuo; Schwingenschlogl, Udo

    2016-01-01

    We study the dynamics of an ultrafast single photon pulse in a one-dimensional waveguide two-point coupled with a Jaynes-Cummings system. We find that for any single photon input the transmissivity depends periodically on the separation between the two coupling points. For a pulse containing many plane wave components it is almost impossible to suppress transmission, especially when the width of the pulse is less than 20 times the period. In contrast to plane wave input, the waveform of the pulse can be modified by controlling the coupling between the waveguide and Jaynes-Cummings system. Tailoring of the waveform is important for single photon manipulation in quantum informatics. PMID:27653770

  13. A procedure for tuning automatic controllers with determining a second-order plant model with time delay from two points of a complex frequency response

    Science.gov (United States)

    Kuzishchin, V. F.; Petrov, S. V.

    2012-10-01

    The problem of obtaining the mathematical model of a plant in the course of adaptively tuning the operating automatic closed-loop control systems is considered. A new method is proposed for calculating the parameters of a model with four free coefficients represented by two inertial sections with a time delay. The model parameters are calculated from the data of experiments on determining two points of a plant's complex frequency response. The results from checking the performance of the method in combination with obtaining information on the plant dynamics by applying the Fourier transform to the impulse transient response of the system are presented. The PID controller is tuned using a parameter scanning algorithm with directly checking the amplitude-frequency response of the closed-loop system, using which the stability margin can be calculated and different quality criteria can be applied.

  14. Reliability of the two-point measurement of the spatial correlation length from Gaussian-shaped fluctuating signals in fusion-grade plasmas

    CERN Document Server

    Kim, Jaewook; Lampert, M; Ghim, Y -c

    2016-01-01

    A statistical method for the estimation of spatial correlation lengths of Gaussian-shaped fluctuating signals with two measurement points is examined to quantitatively evaluate its reliability (variance) and accuracy (bias error). The standard deviation of the correlation value is analytically derived for randomly distributed Gaussian shaped fluctuations satisfying stationarity and homogeneity, allowing us to evaluate, as a function of fluctuation-to-noise ratios, sizes of averaging time windows and ratios of the distance between the two measurement points to the true correlation length, the goodness of the two-point measurement for estimating the spatial correlation length. Analytic results are confirmed with numerically generated synthetic data and real experimental data obtained with the KSTAR beam emission spectroscopy diagnostic. Our results can be applied to Gaussian-shaped fluctuating signals where a correlation length must be measured with only two measurement points.

  15. New algorithms for solving third- and fifth-order two point boundary value problems based on nonsymmetric generalized Jacobi Petrov-Galerkin method.

    Science.gov (United States)

    Doha, E H; Abd-Elhameed, W M; Youssri, Y H

    2015-09-01

    Two families of certain nonsymmetric generalized Jacobi polynomials with negative integer indexes are employed for solving third- and fifth-order two point boundary value problems governed by homogeneous and nonhomogeneous boundary conditions using a dual Petrov-Galerkin method. The idea behind our method is to use trial functions satisfying the underlying boundary conditions of the differential equations and the test functions satisfying the dual boundary conditions. The resulting linear systems from the application of our method are specially structured and they can be efficiently inverted. The use of generalized Jacobi polynomials simplify the theoretical and numerical analysis of the method and also leads to accurate and efficient numerical algorithms. The presented numerical results indicate that the proposed numerical algorithms are reliable and very efficient.

  16. Dynamics of single photon transport in a one-dimensional waveguide two-point coupled with a Jaynes-Cummings system

    KAUST Repository

    Wang, Yuwen

    2016-09-22

    We study the dynamics of an ultrafast single photon pulse in a one-dimensional waveguide two-point coupled with a Jaynes-Cummings system. We find that for any single photon input the transmissivity depends periodically on the separation between the two coupling points. For a pulse containing many plane wave components it is almost impossible to suppress transmission, especially when the width of the pulse is less than 20 times the period. In contrast to plane wave input, the waveform of the pulse can be modified by controlling the coupling between the waveguide and Jaynes-Cummings system. Tailoring of the waveform is important for single photon manipulation in quantum informatics. © The Author(s) 2016.

  17. Reliability of the two-point measurement of the spatial correlation length from Gaussian-shaped fluctuating signals in fusion-grade plasmas

    Science.gov (United States)

    Kim, Jaewook; Nam, Y. U.; Lampert, M.; Ghim, Y.-C.

    2016-10-01

    A statistical method for the estimation of the spatial correlation lengths of Gaussian-shaped fluctuating signals with two measurement points is examined to quantitatively evaluate its reliability (variance) and accuracy (bias error). The standard deviation of the correlation value is analytically derived for randomly distributed Gaussian shaped fluctuations satisfying stationarity and homogeneity, allowing us to evaluate, as a function of fluctuation-to-noise ratios, the sizes of averaging time windows and the ratios of the distance between the two measurement points to the true correlation length, and the goodness of the two-point measurement for estimating the spatial correlation length. Analytic results are confirmed with numerically generated synthetic data and real experimental data obtained with the KSTAR beam emission spectroscopy diagnostic. Our results can be applied to Gaussian-shaped fluctuating signals where a correlation length must be measured with only two measurement points.

  18. Cortical dynamics as a therapeutic mechanism for touch healing.

    Science.gov (United States)

    Kerr, Catherine E; Wasserman, Rachel H; Moore, Christopher I

    2007-01-01

    Touch Healing (TH) therapies, defined here as treatments whose primary route of administration is tactile contact and/or active guiding of somatic attention, are ubiquitous across cultures. Despite increasing integration of TH into mainstream medicine through therapies such as Reiki, Therapeutic Touch,(TM) and somatically focused meditation practices such as Mindfulness-Based Stress Reduction, relatively little is known about potential underlying mechanisms. Here, we present a neuroscientific explanation for the prevalence and effectiveness of TH therapies for relieving chronic pain. We begin with a cross-cultural review of several different types of TH treatments and identify common characteristics, including: light tactile contact and/or a somatosensory attention directed toward the body, a behaviorally relevant context, a relaxed context and repeated treatment sessions. These cardinal features are also key elements of established mechanisms of neural plasticity in somatosensory cortical maps, suggesting that sensory reorganization is a mechanism for the healing observed. Consideration of the potential health benefits of meditation practice specifically suggests that these practices provide training in the regulation of neural and perceptual dynamics that provide ongoing resistance to the development of maladaptive somatic representations. This model provides several direct predictions for investigating ways that TH may induce cortical plasticity and dynamics in pain remediation.

  19. Flexible Electronics Sensors for Tactile Multi-Touching

    Directory of Open Access Journals (Sweden)

    Shao-Hsing Yeh

    2009-02-01

    Full Text Available Flexible electronics sensors for tactile applications in multi-touch sensing and large scale manufacturing were designed and fabricated. The sensors are based on polyimide substrates, with thixotropy materials used to print organic resistances and a bump on the top polyimide layer. The gap between the bottom electrode layer and the resistance layer provides a buffer distance to reduce erroneous contact during large bending. Experimental results show that the top membrane with a bump protrusion and a resistance layer had a large deflection and a quick sensitive response. The bump and resistance layer provided a concentrated von Mises stress force and inertial force on the top membrane center. When the top membrane had no bump, it had a transient response delay time and took longer to reach steady-state. For printing thick structures of flexible electronics sensors, diffusion effects and dimensional shrinkages can be improved by using a paste material with a high viscosity. Linear algorithm matrixes with Gaussian elimination and control system scanning were used for multi-touch detection. Flexible electronics sensors were printed with a resistance thickness of about 32 µm and a bump thickness of about 0.2 mm. Feasibility studies show that printing technology is appropriate for large scale manufacturing, producing sensors at a low cost.

  20. Generic Properties of Curvature Sensing through Vision and Touch

    Directory of Open Access Journals (Sweden)

    Birgitta Dresp-Langley

    2013-01-01

    Full Text Available Generic properties of curvature representations formed on the basis of vision and touch were examined as a function of mathematical properties of curved objects. Virtual representations of the curves were shown on a computer screen for visual scaling by sighted observers (experiment 1. Their physical counterparts were placed in the two hands of blindfolded and congenitally blind observers for tactile scaling. The psychophysical data show that curvature representations in congenitally blind individuals, who never had any visual experience, and in sighted observers, who rely on vision most of the time, are statistically linked to the same mathematical properties of the curves. The perceived magnitude of object curvature, sensed through either vision or touch, is related by a mathematical power law, with similar exponents for the two sensory modalities, to the aspect ratio of the curves, a scale invariant geometric property. This finding supports biologically motivated models of sensory integration suggesting a universal power law for the adaptive brain control and balance of motor responses to environmental stimuli from any sensory modality.