scholarly journals Evidence toward the potential absence of relationship between temporal and spatial heartbeats perception

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Betka Sophie ◽  
Łukowska Marta ◽  
Silva Marta ◽  
King Joshua ◽  
Garfinkel Sarah ◽  
...  
Keyword(s):  
Bayesian Statistics ◽  
State Anxiety ◽  
Discrimination Task ◽  
Spatial Perception ◽  
The Body ◽  
Temporal Perception ◽  
Heartbeat Perception ◽  
Sampling Locations ◽  
Spatial Domains ◽  
Temporal And Spatial

AbstractMany interoceptive tasks (i.e. measuring the sensitivity to bodily signals) are based upon heartbeats perception. However, the temporal perception of heartbeats—when heartbeats are felt—varies among individuals. Moreover, the spatial perception of heartbeats—where on the body heartbeats are felt—has not been characterized in relation to temporal. This study used a multi-interval heartbeat discrimination task in which participants judged the timing of their own heartbeats in relation to external tones. The perception of heartbeats in both time and spatial domains, and relationship between these domains was investigated. Heartbeat perception occurred on average ~ 250 ms after the ECG R-wave, most frequently sampled from the left part of the chest. Participants’ confidence in discriminating the timing of heartbeats from external tones was maximal at 0 ms (tone played at R-wave). Higher confidence was related to reduced dispersion of sampling locations, but Bayesian statistics indicated the absence of relationship between temporal and spatial heartbeats perception. Finally, the spatial precision of heartbeat perception was related to state-anxiety scores, yet largely independent of cardiovascular parameters. This investigation of heartbeat perception provides fresh insights concerning interoceptive signals that contribute to emotion, cognition and behaviour.

Feeling the beat: Temporal and spatial perception of heartbeat sensations

2020 ◽  
Author(s):  
Sophie Betka ◽  
Marta Łukowska ◽  
Marta Silva ◽  
Joshua King ◽  
Sarah Garfinkel ◽  
...  
Keyword(s):  
State Anxiety ◽  
Spatial Perception ◽  
Systematic Investigation ◽  
Health Conditions ◽  
Temporal Perception ◽  
Cardiovascular Parameters ◽  
Sampling Locations ◽  
Spatial Domains ◽  
Temporal And Spatial ◽  
The Relationship

AbstractThe majority of interoceptive tasks (i.e. measuring the sensitivity to bodily signals) are based upon the heartbeat sensations perception. However, temporal perception of heartbeats varies among individuals and confidence and spatial perception of heartbeats in relation to temporal judgements have not yet been systematically investigated. This study examined the perception of heartbeat sensations in both time and spatial domains, using a multi-interval heartbeat discrimination task. The relationship between these domains was investigated, as well as the contribution of mental health conditions and cardiovascular parameters. Heartbeat sensations occurred on average ~250ms after the ECG R-wave and were more frequently sampled from the left part of the chest. Participants’ confidence in their experience of heartbeat sensations was maximal for the 0 ms interval. Interestingly, higher confidence was related to reduced dispersion of sampling locations but we found evidence toward the absence of relationship between temporal and spatial heartbeat sensations perception, using Bayesian statistics. Finally, we found evidence toward a relationship between spatial precision of heartbeat sensations and state anxiety score, which seems independent from the cardiovascular parameters. This systematic investigation of heartbeat sensations perception provides important fresh insights, informing the mechanistic understanding of the interoceptive signaling contribution to emotion, cognition and behaviour.

The Ability of Runners to Identify Spatial and Temporal Variables of Speed During Endurance Running

Motor Control ◽  
2020 ◽  
Vol 24 (4) ◽  
pp. 499-511
Author(s):  
Pedro Ángel Latorre-Román ◽  
Juan Francisco Fernández-Povedano ◽  
Jesús Salas-Sánchez ◽  
Felipe García-Pinillos ◽  
Juan Antonio Párraga-Montilla
Keyword(s):  
Spatial Perception ◽  
Cognitive Skill ◽  
Soccer Players ◽  
Temporal Perception ◽  
Endurance Running ◽  
Temporal Variables ◽  
Temporal And Spatial ◽  
Endurance Runners ◽  
And Performance ◽  
Level Group

This study aimed to evaluate spatial and temporal perception in endurance runners as a mechanism of pacing control in comparison with other athletes (soccer players). A group of 38 endurance runners and 32 soccer players participated in this study. Runners displayed lower time differences and lower error than soccer players. Taking the athletic levels of endurance runners into consideration, significant differences (p = .011, Cohen’s d = 1.042) were found in the time differences (higher level group = 33.43 ± 29.43 vs. lower level group = 123.53 ±102.61). Significant correlations were found between time differences and performance in a Cooper test (r = −.546) and with the best time in a half marathon (r = .597). Temporal and spatial perception can be considered as a cognitive skill of endurance runners.

scholarly journals Assessing the Effect of Drought on Winter Wheat Growth Using Unmanned Aerial System (UAS)-Based Phenotyping

2021 ◽  
Vol 13 (6) ◽  
pp. 1144
Author(s):  
Mahendra Bhandari ◽  
Shannon Baker ◽  
Jackie C. Rudd ◽  
Amir M. H. Ibrahim ◽  
Anjin Chang ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Vegetation Indices ◽  
Grain Filling ◽  
Unmanned Aerial Systems ◽  
High Temporal Resolution ◽  
Wheat Growth ◽  
Spatial Domains ◽  
Temporal And Spatial

Drought significantly limits wheat productivity across the temporal and spatial domains. Unmanned Aerial Systems (UAS) has become an indispensable tool to collect refined spatial and high temporal resolution imagery data. A 2-year field study was conducted in 2018 and 2019 to determine the temporal effects of drought on canopy growth of winter wheat. Weekly UAS data were collected using red, green, and blue (RGB) and multispectral (MS) sensors over a yield trial consisting of 22 winter wheat cultivars in both irrigated and dryland environments. Raw-images were processed to compute canopy features such as canopy cover (CC) and canopy height (CH), and vegetation indices (VIs) such as Normalized Difference Vegetation Index (NDVI), Excess Green Index (ExG), and Normalized Difference Red-edge Index (NDRE). The drought was more severe in 2018 than in 2019 and the effects of growth differences across years and irrigation levels were visible in the UAS measurements. CC, CH, and VIs, measured during grain filling, were positively correlated with grain yield (r = 0.4–0.7, p < 0.05) in the dryland in both years. Yield was positively correlated with VIs in 2018 (r = 0.45–0.55, p < 0.05) in the irrigated environment, but the correlations were non-significant in 2019 (r = 0.1 to −0.4), except for CH. The study shows that high-throughput UAS data can be used to monitor the drought effects on wheat growth and productivity across the temporal and spatial domains.

scholarly journals EFEKTIVITAS ART THERAPY DALAM MENURUNKAN KECEMASAN PADA IBU YANG MEMILIKI ANAK PENDERITA KANKER

2021 ◽  
Vol 5 (1) ◽  
pp. 55
Author(s):  
Christella Ruslan ◽  
Monty P. Satiadarma ◽  
Untung Subroto
Keyword(s):  
Art Therapy ◽  
Trait Anxiety ◽  
Psychological Health ◽  
State Anxiety ◽  
The State ◽  
The Body ◽  
Measurement Tool ◽  
State Trait Anxiety Inventory ◽  
Children With Cancer ◽  
Quasi Experimental

Cancer is caused by the uncontrolled development of cells in the body and can cause death in someone who experiences it. This condition can affect the physical and psychological health of parents, especially mothers who look after and care for their children. Seeing this, having a child with cancer can certainly cause anxiety in a mother. At the same time, a mother is certainly required to provide emotional support to her child who is sick. This study aims to examine the effectiveness of art therapy in reducing anxiety in mothers of children with cancer. Art therapy that is applied to mothers who have children with cancer can help reduce the anxiety they feel because through this therapy participants are assisted in exploring, releasing their emotions and feelings of anxiety. Through this intervention, mothers who have children with cancer can experience catharsis and express their feelings. Participants in this study consisted of two mothers who have children with cancer. The design of this study is a quasi-experimental study by testing the pretest and posttest using the State-Trait Anxiety Inventory (STAI) measurement tool in measuring state and trait anxiety from mothers who have children with cancer. The results of the study found that there was a decrease in the number of state anxiety by 14 in the R participant and 8 in the RS participant. Based on this, it can be concluded that art therapy intervention can reduce the state anxiety in mothers who have children with cancer. Kanker disebabkan oleh adanya perkembangan sel yang tidak terkendali dalam tubuh dan dapat menyebabkan kematian pada seseorang yang mengalaminya. Kondisi ini dapat memengaruhi kesehatan secara fisik dan psikologis dari orang tua, terutama ibu yang menjaga serta merawat anaknya. Melihat hal ini, memiliki anak penderita kanker tentu dapat menimbulkan kecemasan dalam diri seorang ibu. Pada saat yang bersamaan, seorang ibu tentu dituntut untuk memberi dukungan secara emosional kepada anaknya yang sedang sakit. Penelitian ini bertujuan untuk meneliti efektivitas dari art therapy dalam menurunkan kecemasan pada ibu yang memiliki anak penderita kanker. Art therapy yang diterapkan pada ibu yang memiliki anak penderita kanker dapat membantu menurunkan kecemasan yang dirasakan karena melalui terapi ini partisipan dibantu agar bisa mengeksplorasi dan mengeluarkan emosi serta perasaan cemas yang dimiliki. Melalui intervensi art therapy ini, ibu yang memiliki anak penderita kanker dapat melakukan katarsis dan mengungkapkan perasaannya. Partisipan dalam penelitian ini terdiri atas dua orang ibu yang memiliki anak penderita kanker. Adapun desain penelitian ini adalah kuasi-eksperimental dengan menguji pretest dan posttest yang menggunakan alat ukur State-Trait Anxiety Inventory (STAI) dalam mengukur kecemasan secara state dan trait dari ibu yang memiliki anak penderita kanker. Hasil penelitian menemukan adanya penurunan angka dari skor state anxiety sebesar 14 pada partisipan R dan 8 pada partisipan RS. Berdasarkan hal tersebut, dapat disimpulkan bahwa intervensi art therapy dapat membantu menurunkan kecemasan secara state anxiety pada ibu yang memiliki anak penderita kanker.

The Dynamic Boundaries of The Self: Serial Dependence In Embodied Sense of Agency

2021 ◽  
Author(s):  
Yoni Stern ◽  
Inbar Ben-Yehuda ◽  
Danny Koren ◽  
ADAM ZAIDEL ◽  
Roy Salomon
Keyword(s):  
The Self ◽  
Sense Of Agency ◽  
Embodied Experience ◽  
Serial Dependence ◽  
Actual Movement ◽  
Spatial Domains ◽  
Temporal And Spatial ◽  
Embodied Self ◽  
External Stimuli ◽  
Over Time

The feeling of control over one’s actions, termed the Sense of Agency (SoA), delineates one’s experience as an embodied self. Although, this embodied experience is typically perceived as stable over time, recent theoretical accounts highlight the experience-dependent and dynamic nature of the embodied self. In this study we examined how recent experiences modulate SoA (i.e., serial dependence), and disambiguated the unique contributions of previous stimuli and choices on subsequent SoA judgments. In addition, we examined whether these effects persist across different domains of perceptual alteration. We analyzed two independent datasets of the Virtual Hand (VH) task (N = 100 participants) in which a sensorimotor conflict is introduced between the presented visual feedback and the actual movement performed. In Dataset 1, which included only temporal alterations, we found that previous stimuli recalibrate current perception, increasing the likelihood of the current choice to be different than the previous choice. Whereas previous choices induce a repetition bias increasing the likelihood to repeat choices across trials. Thus, previous external stimuli and self-generated choices exert opposing influences on SoA. We replicated these findings in Dataset 2, in which the VH task was tested with alterations in both temporal and spatial domains. In addition, we discovered that previous stimuli from a different perceptual domain exert a recalibration effect similar to stimuli from the same domain. Thus, SoA is constantly shaped by our previous subjective choices and objective stimuli experienced even across different perceptual domains. This highlights how SoA may act as unifying construct organizing our experience of the self over time and across perceptual experiences.

scholarly journals Assessment of the Number of Valid Observations and Diurnal Changes in Chl-a for GOCI: Highlights for Geostationary Ocean Color Missions

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3377
Author(s):  
Dan Zhao ◽  
Lian Feng
Keyword(s):  
Ocean Color ◽  
Inland Waters ◽  
Diurnal Changes ◽  
Satellite Mission ◽  
Pronounced Difference ◽  
Chl A ◽  
Spatial Domains ◽  
The Mean ◽  
Temporal And Spatial ◽  
The Western Pacific

The first geostationary ocean color satellite mission (geostationary ocean color imager, or GOCI) has provided eight hourly observations per day over the western Pacific region since June 2010. GOCI imagery has been widely used to track the short-term dynamics of coastal and inland waters. Few studies have been performed to comprehensively assess the advantages of GOCI images in obtaining valid observations and estimating diurnal changes within the water column. Using the entire mission dataset between 2011 and 2017, these knowledge gaps were filled by comparing the daily percentages of valid observations (DPVOs) between GOCI and MODIS Aqua (MODISA) and by examining the diurnal changes in Chl-a over the East China Sea. The mean DPVOs of GOCI was 152.6% over the clear open ocean, suggesting that a daily valid coverage could be expected with GOCI. The GOCI DPVOs were ~26 times greater than the MODISA DPVOs; this pronounced difference was caused by the combined effects of their different observational frequencies and the more conservative quality flag system for MODISA. Diurnal changes in the GOCI-derived Chl-a were also found, with generally higher Chl-a in the afternoon than the morning and pronounced heterogeneities in the temporal and spatial domains. However, whether such diurnal changes are due to the real dynamics of the oceanic waters or artifacts of the satellite retrievals remains to be determined. This study provides the first comprehensive quantification of the unparalleled advantages of geostationary ocean color missions over polar orbiters, and the results highlights the importance of geostationary ocean color missions in studying coastal and inland waters.

Including Vibration Characteristics Within Compressive Sensing Formulations for Structural Monitoring of Beams

2017 ◽  
Author(s):  
Vaahini Ganesan ◽  
Tuhin K. Das ◽  
Jeffrey L. Kauffman ◽  
Nazanin Rahnavard
Keyword(s):  
Boundary Conditions ◽  
Compressive Sensing ◽  
Continuous Monitoring ◽  
Structural Changes ◽  
Vibration Monitoring ◽  
High Data ◽  
Data Volume ◽  
Spatial Domains ◽  
Temporal And Spatial ◽  
Detection And Localization

Vibration-based monitoring of mechanical structures often involves continuous monitoring that result in high data volume and instrumentation with a large array of sensors. Previously, we have shown that Compressive Sensing (CS)-based vibration monitoring can significantly reduce both volume of data and number of sensors in temporal and spatial domains respectively. In this work, further analysis of CS-based detection and localization of structural changes is presented. Incorporating damping and noise handling in the CS algorithm improved its performance for frequency recovery. CS-based reconstruction of deflection shape of beams with fixed boundary conditions is addressed. Formulation of suitable bases with improved conditioning is explored. Restricting hyperbolic terms to lower frequencies in the basis functions improves reconstruction. An alternative is to generate an augmented basis that combines harmonic and hyperbolic terms. Incorporating known boundary conditions into the CS problem is studied.

scholarly journals What is Movement?

2019 ◽  
Vol 7 (1) ◽  
pp. 9
Author(s):  
Nikos C. Apostolopoulos
Keyword(s):  
The Body ◽  
Human Existence ◽  
Temporal Perception ◽  
Human Consciousness ◽  
The Core ◽  
Time Space ◽  
The World ◽  
Spatio Temporal

On the basis of their corporeity humans are not only beings of distance but also the beings of proximity, rooted beings, not only inner worldly but also beings in the world (Patocka, 1998)Over the centuries the dialectical confluence of metaphysics and epistemology has been at the forefront in the attempt to define the concept of what it is to be human and ultimately human existence. The union of several aspects conceived from these two opposite elements has been responsible for the genesis of numerous philosophical terms and ideas such as: rationalism, materialism, socialism and idealism. Although these terms reference something different, what is primarily at the core has been the endeavour to analyse and demonstrate that it is through man’s relationship with nature that one garners the understanding of self. Human consciousness in conjunction with a spatio-temporal perception, defined as movement through the time-space continuum, creates the condition where the possibility of defining the essence of existence may blossom. In this commentary, an effort is made to present movement, specifically its relationship to the “body” as the physical construct for the meaning of self.

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