Effect of Work Boot Characteristics on Vibration Transmitted to Workers’ Feet and Subjective Discomfort

2018 ◽  
pp. 1043-1051
Author(s):  
Marco Tarabini ◽  
Tammy Eger ◽  
Katie Goggins ◽  
Filippo Goi ◽  
Francesco Corti
Keyword(s):  
Subjective Discomfort

scholarly journals Placebo and nocebo effects in youth: subjective thermal discomfort can be modulated by a conditioning paradigm utilizing mental states of low and high self-efficacy

2021 ◽  
pp. 204946372110200
Author(s):  
Ella Weik ◽  
Regula Neuenschwander ◽  
Karin Jensen ◽  
Tim F Oberlander ◽  
Christine Tipper
Keyword(s):  
Placebo Effect ◽  
Self Efficacy ◽  
Group Analysis ◽  
Structured Interview ◽  
Thermal Stimulus ◽  
Nocebo Effect ◽  
Conditioning Paradigm ◽  
Significant Difference ◽  
Nocebo Effects ◽  
Subjective Discomfort

Introduction: Conditioning is a key mechanism of placebo and nocebo effects in adults, but little is known about these effects in youth. This study investigated whether personalized verbal cues evoking a sense of high or low self-efficacy can induce conditioned placebo and nocebo effects on subjective discomfort of noxious heat in youth. Methods: In a structured interview, 26 adolescents (13–18 years) described personal situations in which they experienced a sense of high, low or neutral self-efficacy. Participants were then asked to recall these memories during a conditioning paradigm, in which a high thermal stimulus applied to the forearm was repeatedly paired with a low self-efficacy cue and a low thermal stimulus with a high self-efficacy cue. In a testing phase, high, low and neutral self-efficacy cues were paired with the same moderate temperature. We hypothesized that conditioned high and low self-efficacy cues would induce conditioned placebo and nocebo responses to moderate temperatures. Results: Moderate temperatures were rated as more uncomfortable when paired with the conditioned low compared with the neutral self-efficacy cue (nocebo effect). While in the whole-group analysis, there was no significant difference between ratings of moderate thermal stimuli paired with high compared with neutral self-efficacy cues (placebo effect), a sub-group of participants with a greater range of emotional valence between high and neutral self-efficacy cues revealed a significant placebo effect. The strength of the nocebo effect was associated with higher anxiety and lower hope. Conclusion: Conditioned associations using internal self-efficacy states can change subjective discomfort of thermal sensations.

scholarly journals Impact of a Vibrotactile Belt on Emotionally Challenging Everyday Situations of the Blind

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7384
Author(s):  
Charlotte Brandebusemeyer ◽  
Anna Ricarda Luther ◽  
Sabine U. König ◽  
Peter König ◽  
Silke M. Kärcher
Keyword(s):  
Emotional Impact ◽  
Vibrotactile Stimulation ◽  
Angular Rotation ◽  
Straight Line ◽  
Before And After ◽  
Fixed Reference ◽  
Behavioural Experiments ◽  
Triangle Completion ◽  
Subjective Discomfort ◽  
Magnetic North

Spatial orientation and navigation depend primarily on vision. Blind people lack this critical source of information. To facilitate wayfinding and to increase the feeling of safety for these people, the “feelSpace belt” was developed. The belt signals magnetic north as a fixed reference frame via vibrotactile stimulation. This study investigates the effect of the belt on typical orientation and navigation tasks and evaluates the emotional impact. Eleven blind subjects wore the belt daily for seven weeks. Before, during and after the study period, they filled in questionnaires to document their experiences. A small sub-group of the subjects took part in behavioural experiments before and after four weeks of training, i.e., a straight-line walking task to evaluate the belt’s effect on keeping a straight heading, an angular rotation task to examine effects on egocentric orientation, and a triangle completion navigation task to test the ability to take shortcuts. The belt reduced subjective discomfort and increased confidence during navigation. Additionally, the participants felt safer wearing the belt in various outdoor situations. Furthermore, the behavioural tasks point towards an intuitive comprehension of the belt. Altogether, the blind participants benefited from the vibrotactile belt as an assistive technology in challenging everyday situations.

Premedication with Ipratropium Bromide for Bronchoscopy Produces Subjective Discomfort without Significant Clinical Benefit

1998 ◽  
Vol 5 (3) ◽  
pp. 200-203
Author(s):  
Jeffrey B. Rubins ◽  
Carol Bofenkamp ◽  
Melynne Youngblood ◽  
JoAnne Billings ◽  
Alain Broccard
Keyword(s):  
Clinical Benefit ◽  
Ipratropium Bromide ◽  
Significant Clinical Benefit ◽  
Subjective Discomfort

Torque Levels, Subjective Discomfort, and Muscle Activity Associated with Four Commercially Available Screwdrivers under Static and Dynamic Work Conditions

2006 ◽  
Vol 102 (2) ◽  
pp. 291-301 ◽  
Author(s):  
Mao-Jiun J. Wang ◽  
Chih-Long Lin ◽  
Yuh-Chuan Shih ◽  
Hsiu-Chen Chung ◽  
Helmut Strasser
Keyword(s):  
Muscle Activity ◽  
Work Conditions ◽  
Dynamic Work ◽  
Subjective Discomfort ◽  
Static And Dynamic Work

Physiological Responses and Subjective Discomfort of Simulated Whole-Body Vibration from a Mobile Underground Mining Machine

1988 ◽  
Vol 32 (11) ◽  
pp. 719-723 ◽  
Author(s):  
Thomas G. Bobick ◽  
Richard L. Unger ◽  
Sean Gallagher ◽  
Diane M. Doyle-Coombs
Keyword(s):  
Underground Mining ◽  
Whole Body Vibration ◽  
Vertical Vibration ◽  
Whole Body ◽  
Mining Machine ◽  
Body Vibration ◽  
Vibration Data ◽  
Computer Controlled ◽  
Selected Effects ◽  
Subjective Discomfort

The U.S. Bureau of Mines has developed an in-house facility to evaluate selected effects of whole-body vibration (WBV) levels experienced by underground mobile equipment operators. Vertical vibration data were collected from a coal haulage vehicle via a uniaxial accelerometer attached to the machine frame under the operator's seat. Data were analyzed and processed so a computer-controlled platform could approximate the vibration signals. Eight men (35.5 yr ± 6.5 SD) participated in a pilot study to evaluate the effects of shock and WBV on heart rate (HR), blood pressure (BP), and subjective discomfort. Subjects were exposed to vibration for 30-min periods while seated in a typical seat (backrest angle at 90° or 130°) that was plain steel or modified with 2 in foam padding. Subjects repeated the same protocol on a separate day, without the vibration. Results indicated the vibration significantly increased the HR (p < 0.01), systolic BP, mean BP, the number of times subjects reported discomfort, and overall subjective discomfort rating (p < 0.05). When seated in the steel seat, the overall discomfort rating (p < 0.001) and the number of times discomfort was reported (p < 0.05) increased significantly. Seatback angle had no significant effect on any of the dependent measures.

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