scholarly journals Tactile Feels in Grasping/Cutting Processes with Scissors

Technologies ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 66 ◽  
Author(s):  
Mioto Waga ◽  
Yuuki Aita ◽  
Junichi Noma ◽  
Yoshimune Nonomura
Keyword(s):  
Evaluation System ◽  
Tangential Force ◽  
Adhesive Tape ◽  
Mechanical Stimuli ◽  
Surgical Robots ◽  
The Moment ◽  
Cutting Processes ◽  
Tactile Sensations ◽  
The Relationship ◽  
Force Profiles

Understanding the dynamic phenomena in grasping/cutting processes with scissors is important for the design of surgical robots and virtual reality systems. Here, we show the relationship between the mechanical stimuli and tactile sensations when forceps or scissors are used. Nineteen subjects grasped or cut objects and evaluated the tactile sensations in each of the processes. To conduct the tactile and mechanical evaluation simultaneously, subjects operated scissors that were fixed to a mechanical evaluation system. When subjects grasped urethane resin, stainless steel plate, and adhesive tape, soft, hard, and sticky feels were perceived, respectively. Dry, hard, and creaking feels were perceived in the paper cutting process. In addition, we observed four characteristic tangential force profiles in the processes. Regression analysis suggests the following findings: Hardness is perceived by the change of force and blade movement when the scissors make contact with the object. Stickiness is caused by the increase and decrease of force at the moment of peeling when the scissors break contact with the object. The cutting sensation is affected by fine force fluctuations during the scissors closing and the rapidly decreased force at the moment of cutting completion.

scholarly journals Scissors-Type Haptic Device Using Magnetorheological Fluid Containing Iron Nanoparticles

Technologies ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 26 ◽  
Author(s):  
Mioto Waga ◽  
Yuuki Aita ◽  
Junichi Noma ◽  
Takehito Kikuchi ◽  
Yoshimune Nonomura
Keyword(s):  
Evaluation System ◽  
Mechanical Response ◽  
Magnetorheological Fluid ◽  
Tactile Display ◽  
Haptic Device ◽  
Mechanical Stimuli ◽  
Mr Fluid ◽  
Tactile Stimuli ◽  
Simulation Systems ◽  
Force Profiles

The mechanical ability and usefulness of simulation systems can be improved by combining a tactile display with a remote control or medical simulation systems. In this study, a scissors-type haptic device containing magnetorheological fluid (MR fluid) in its fulcrum is developed. We evaluate the mechanical response to the applied voltage and realize the presence of mechanical stimuli when a subject grasps or cuts the corresponding objects. When the magnetic field around the MR fluid is controlled by an electric voltage of 150–500 mV, the torque linearly increases from 0.007 ± 0.000 to 0.016 ± 0.000 N m. The device can provide tactile stimuli with 0.1 s of resolution. We also determined the voltage profiles based on typical force profiles obtained during grasping/cutting processes and evaluated the torque using a mechanical evaluation system. Features of the force profiles related to the soft and sticky feels were reconstructed well.

Grading Teachers: Race and Gender Differences in Low Evaluation Ratings and Teacher Employment Outcomes

2019 ◽  
Vol 56 (5) ◽  
pp. 1800-1833 ◽  
Author(s):  
Steven Drake ◽  
Amy Auletto ◽  
Joshua M. Cowen
Keyword(s):  
Charter Schools ◽  
Evaluation System ◽  
Employment Outcomes ◽  
Teachers Of Color ◽  
High Stakes ◽  
Teacher Labor Market ◽  
Race And Gender ◽  
And Gender ◽  
To Receive ◽  
The Relationship

In July 2011, the State of Michigan adopted a broad set of teacher labor market reforms, including a high-stakes evaluation system designed in part to remove low-performing teachers. We examine the characteristics of teachers rated as “minimally effective” and “ineffective,” as well as their schools, and the relationship between low effectiveness ratings and later employment outcomes. Results suggest teachers of color across traditional and charter schools are more likely to receive low effectiveness ratings than their within-school peers. These low rating risks are higher for teachers of color working in comparatively White-faculty contexts. Male and novice teachers are also rated low more frequently, and important differences appear to exist in the usage of low ratings by traditional public and charter schools.

scholarly journals Quantitative Evaluation of Osteocyte Morphology and Bone Anisotropic Extracellular Matrix in Rat Femur

2021 ◽  
Author(s):  
Takuya Ishimoto ◽  
Keita Kawahara ◽  
Aira Matsugaki ◽  
Hiroshi Kamioka ◽  
Takayoshi Nakano
Keyword(s):  
Extracellular Matrix ◽  
Longitudinal Axis ◽  
Rat Femur ◽  
Male Rat ◽  
Mechanical Stimuli ◽  
Axis Orientation ◽  
Principal Stress Direction ◽  
Mechanical Integrity ◽  
Osteocyte Lacunae ◽  
The Relationship

AbstractOsteocytes are believed to play a crucial role in mechanosensation and mechanotransduction which are important for maintenance of mechanical integrity of bone. Recent investigations have revealed that the preferential orientation of bone extracellular matrix (ECM) mainly composed of collagen fibers and apatite crystallites is one of the important determinants of bone mechanical integrity. However, the relationship between osteocytes and ECM orientation remains unclear. In this study, the association between ECM orientation and anisotropy in the osteocyte lacuno-canalicular system, which is thought to be optimized along with the mechanical stimuli, was investigated using male rat femur. The degree of ECM orientation along the femur longitudinal axis was significantly and positively correlated with the anisotropic features of the osteocyte lacunae and canaliculi. At the femur middiaphysis, there are the osteocytes with lacunae that highly aligned along the bone long axis (principal stress direction) and canaliculi that preferentially extended perpendicular to the bone long axis, and the highest degree of apatite c-axis orientation along the bone long axis was shown. Based on these data, we propose a model in which osteocytes can change their lacuno-canalicular architecture depending on the mechanical environment so that they can become more susceptible to mechanical stimuli via fluid flow in the canalicular channel.

scholarly journals Micromechanism of the Breakage of Two Spherical Gypsum Particles under Normal–Tangential Contact Conditions

2021 ◽  
Vol 11 (9) ◽  
pp. 4039
Author(s):  
Yiran Niu ◽  
Lin Li ◽  
Yanwei Zhang ◽  
Shicai Yu ◽  
Jian Zhou
Keyword(s):  
Tangential Force ◽  
Coarse Grained ◽  
Spherical Particles ◽  
Contact Conditions ◽  
Normal Contact ◽  
Tangential Contact ◽  
Theoretical Predictions ◽  
Tangential Forces ◽  
Predicted Values ◽  
The Relationship

Contact breakage of particles makes a large difference in the strength of coarse-grained soils, and exploring the characteristics within the process of the breakage is of great significance. Ignoring the influence of particle shape, the micromechanism of two spherical particles breaking under normal–tangential contact conditions was investigated theoretically and experimentally. Through theoretical analysis, the breakage form, the shape and size of the conical core, and the relationship between the normal and tangential forces at crushing were predicted. Particle contact tests of two gypsum spheres were carried out, in which the breakage forms, features of the conical cores and the normal and tangential forces at crushing were recorded for comparison with the predicted values. The test results and the theoretical predictions showed good agreement. Both the analysis and test demonstrate that the presence of tangential forces causes the conical core to assume the shape of an oblique cone, and the breakage form to change. Moreover, with increasing normal contact force, the tangential force needed for crushing increases gradually first and then decreases suddenly.

scholarly journals Externalizing and internalizing symptoms and coping strategies in young victims of abuse

2021 ◽  
Author(s):  
Juan Manuel Moreno-Manso ◽  
Mª. Elena García-Baamonde ◽  
Eloísa Guerrero-Barona ◽  
Mª. José Godoy-Merino ◽  
Mónica Guerrero-Molina ◽  
...  
Keyword(s):  
Coping Strategies ◽  
Coping Style ◽  
Internalizing Symptoms ◽  
Evaluation System ◽  
Externalizing Symptoms ◽  
Protective Measures ◽  
And Coping ◽  
The Relationship ◽  
Internalizing And Externalizing ◽  
Internalizing And Externalizing Symptoms

AbstractThis research analyses the internalizing and externalizing symptoms and the coping strategies of young victims of abuse. These young people are in residential care under protective measures due to abuse. The participants were 61 youths (32 male and 29 female) between 12 and 17 years of age. Different works of research stress the need for an early identification of the psychopathological symptomatology that these adolescents may present in order to provide an adequate psycho-educational intervention. The relationship between the adolescents’ psychopathological symptomatology and the coping strategies and styles they use to resolve problems is studied. It is also analyzed whether internalizing and externalizing problems predict the style and coping strategies of adolescents. Two tests were used: 1. Child and Adolescent Evaluation System (SENA); 2. Adolescent Coping Scales (ACS). The results indicate that young victims of abuse have internalizing and externalizing symptoms. These adolescents are characterized by an unproductive coping style, as well as by the use of coping strategies that are not very functional and ineffective for resolving conflicts. The psychopathological symptomatology is related to and predicts an unproductive coping style, badly adapted to solving daily problems (worrying, blaming oneself, not coping, ignoring the problem, or keeping it to oneself). This research has allowed us to identify the presence of several areas of vulnerability in these young persons which could be playing an important role in their psychosocial maladjustment. The research suggests the design of intervention strategies, for both groups and individuals, aimed at mitigating and modifying the sources of the problems in victims of child abuse.

Feelings of Guilt and Fantasies in Life Experiences of Brazilian Parents Due to Death of their Newborn: A Clinical-qualitative Study Conducted at a University Hospital

2017 ◽  
Vol 41 (S1) ◽  
pp. S616-S616
Author(s):  
L. Rodrigues ◽  
J.V. Freitas-de-Jesus ◽  
G. Lavorato-Neto ◽  
D.D. Lima ◽  
E.R. Turato ◽  
...  
Keyword(s):  
Neonatal Intensive Care ◽  
Life Experiences ◽  
Technological Development ◽  
Emotional Experience ◽  
University Hospital ◽  
Parents And Children ◽  
Cultural Pattern ◽  
Competing Interest ◽  
The Moment ◽  
The Relationship

IntroductionThe relationship between parents and children is a complex link. In the process of pregnancy-birth-puerperium, frequent feelings such as responsibility, love, fear, uncertainty, generate strong expectations at birth. The death of a newborn may not be perceived as natural by the parents, considering the local culture and the context of great technological development of neonatology.ObjectiveTo explore possible guilt and fantasies in life experiences of parents during mourning process due to death of their newborn.MethodClinical-qualitative design, a particularization of qualitative methods here applied in clinical assistance settings with highlight to psychological aspects. Data collection with the technique of semi-directed interview with open-ended questions, in-depth. Sample intentionally constructed, with closure by theoretical saturation of information. The participants were 7 parents, mourning by the death of their child at the neonatal intensive care unit, in a university hospital of Campinas, São Paulo State.ResultsFeelings of guilt - conscious or not - lead to an internal and particular movement so that mourning can be lived. The participants showed certain embarrassment, accompanied by natural suffering facing to the cultural pattern that permeates the emotional experience. It predicts types of psychological meanings that the experience will give to the person.ConclusionHealth professionals working with bereaved parents should consider more deeply the moment these one experienced, with emphasis on the details of the death scenery, beside the problems of illness and death properly so called.Disclosure of interestThe authors have not supplied their declaration of competing interest.

scholarly journals Embodying the Site: the Here and Now in Site-Specific Dance Performance

2005 ◽  
Vol 21 (4) ◽  
pp. 367-381 ◽  
Author(s):  
Victoria Hunter
Keyword(s):  
Creative Process ◽  
Dance Performance ◽  
Site Specific ◽  
The Creation ◽  
Spirit Of Place ◽  
The Moment ◽  
The University ◽  
The Relationship

In this article, Victoria Hunter explores the concept of the ‘here and now’ in the creation of site-specific dance performance, in response to Doreen Massey's questioning of the fixity of the concept of the ‘here and now’ during the recent RESCEN seminar on ‘Making Space’, in which she challenged the concept of a singular fixed ‘present’, suggesting instead that we exist in a constant production of ‘here and nows’ akin to ‘being in the moment’. Here the concept is applied to an analysis of the author's recent performance work created as part of a PhD investigation into the relationship between the site and the creative process in site-specific dance performance. In this context the notion of the ‘here and now’ is discussed in relation to the concept of dance embodiment informed by the site and the genius loci, or ‘spirit of place’. Victoria Hunter is a Lecturer in Dance at the University of Leeds, who is currently researching a PhD in site-specific dance performance.

scholarly journals Recent Advances in Biomarkers and Regenerative Medicine for Diabetic Neuropathy

2021 ◽  
Vol 22 (5) ◽  
pp. 2301
Author(s):  
Yoshikai Fujita ◽  
Tatsufumi Murakami ◽  
Akihiro Nakamura
Keyword(s):  
Diabetic Neuropathy ◽  
Target Gene ◽  
Pathological Condition ◽  
Nerve Fibers ◽  
Nerve Degeneration ◽  
Limb Amputation ◽  
Sensory Impairment ◽  
Mechanical Stimuli ◽  
Pathological Conditions ◽  
The Relationship

Diabetic neuropathy is one of the most common complications of diabetes. This complication is peripheral neuropathy with predominant sensory impairment, and its symptoms begin with hyperesthesia and pain and gradually become hypoesthesia with the loss of nerve fibers. In some cases, lower limb amputation occurs when hypoalgesia makes it impossible to be aware of trauma or mechanical stimuli. On the other hand, up to 50% of these complications are asymptomatic and tend to delay early detection. Therefore, sensitive and reliable biomarkers for diabetic neuropathy are needed for an early diagnosis of this condition. This review focuses on systemic biomarkers that may be useful at this time. It also describes research on the relationship between target gene polymorphisms and pathological conditions. Finally, we also introduce current information on regenerative therapy, which is expected to be a therapeutic approach when the pathological condition has progressed and nerve degeneration has been completed.

Predicting emotions in music using the onset curve

2021 ◽  
pp. 030573562110316
Author(s):  
Elena Saiz-Clar ◽  
Miguel Ángel Serrano ◽  
José Manuel Reales
Keyword(s):  
Emotional Response ◽  
Principal Component ◽  
Musical Instrument ◽  
Musical Score ◽  
Musical Note ◽  
Human Voice ◽  
Frequency Domains ◽  
Complete Set ◽  
The Moment ◽  
The Relationship

The relationship between parameters extracted from the musical stimuli and emotional response has been traditionally approached using several physical measures extracted from time or frequency domains. From time-domain measures, the musical onset is defined as the moment in that any musical instrument or human voice issues a musical note. The onsets’ sequence in the performance of a specific musical score creates what is known as the onset curve (OC). The influence of the structure of OC on the emotional judgment of people is not known. To this end, we have applied principal component analysis on a complete set of variables extracted from the OC to capture their statistical structure. We have found a trifactorial structure related to activation and valence dimensions of emotional judgment. The structure has been cross-validated using different participants and stimuli. In this way, we propose the factorial scores of the OC as a reliable and relevant piece of information to predict the emotional judgment of music.

scholarly journals Morphology of lateral line canals in Neotropical freshwater stingrays (Chondrichthyes: Potamotrygonidae) from Negro River, Brazilian Amazon

2010 ◽  
Vol 8 (4) ◽  
pp. 867-876 ◽  
Author(s):  
Akemi Shibuya ◽  
Jansen Zuanon ◽  
Maria Lúcia G. de Araújo ◽  
Sho Tanaka
Keyword(s):  
Lateral Line ◽  
The Body ◽  
Mechanical Stimuli ◽  
High Concentration ◽  
Ventral Region ◽  
Negro River ◽  
Accurate Localization ◽  
Posterior Lateral Line ◽  
The Family ◽  
The Relationship

The relationship between the distribution of the lateral line canals and their functionality has not been well examined in elasmobranchs, especially among Neotropical freshwater stingrays of the family Potamotrygonidae. The spatial distribution of the canals and their tubules and the quantification of the neuromasts were analyzed in preserved specimens of Potamotrygon motoro, P. orbignyi, Potamotrygon sp. "cururu", and Paratrygon aiereba from the middle Negro River, Amazonas, Brazil. The hyomandibular, infraorbital, posterior lateral line, mandibular, nasal and supraorbital canals were characterized and their pores and neuromasts quantified. The ventral canals are known to facilitate the accurate localization of prey items under the body, and our results indicate that the dorsal canals may be employed in identifying the presence of predators or potential prey positioned above the stingray's body. The presence of non-pored canals in the ventral region may be compensated by the high concentration of neuromasts found in the same area, which possibly allow the accurate detection of mechanical stimuli. The concentration of non-pored canals near the mouth indicates their importance in locating and capturing prey buried in the bottom substrate, possibly aided by the presence of vesicles of Savi.

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