scholarly journals Lightning-induced pacing system malfunction: a case report

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Bogdan Obszański ◽  
Łukasz Tułecki ◽  
Andrzej Kutarski ◽  
Andrzej Kleinrok
Keyword(s):  
Tertiary Hospital ◽  
The Body ◽  
Lightning Strike ◽  
Natural Phenomenon ◽  
Lead Extraction ◽  
Pacing Threshold ◽  
Lightning Bolt ◽  
Pacemaker Function ◽  
Pacemaker Dysfunction ◽  
Electrode Interface

Abstract Background Atmospheric electrical discharge is an extremely powerful natural phenomenon which can have dangerous and lethal effects on the human body. However, there is no evidence to indicate whether and, if so, to what extent the electric current travelling through the body can affect proper pacemaker function. Case summary An 80-year-old patient admitted to emergency department after being struck by a lightning bolt while riding a bike. The patient had a DDD pacemaker implanted 4 years prior to the incident. The ECG on admission depicted pacemaker spikes and native sinus rhythm at 50–60 b.p.m. On the 3rd day after admission the patient developed recurrent pacing-induced tachycardia. Pacemaker interrogation showed high pacing thresholds (failure to pace in the atrial channel). When the patient’s condition stabilized she was transferred to the tertiary hospital for transcutaneous lead extraction. The extracted pacing system was sent to Biotronik for thorough evaluation. Discussion Injuries due to a lightning strike are considered a rare occurrence but being struck by lightning with a pacemaker or an ICD is even less common. In the present case, the cause of cardiac arrhythmia was most probably electrical burn at the endocardial-electrode interface and a sudden elevation of the pacing threshold leading to transient pacing failure in both PM channels. To the best of our knowledge, in this case presentation we first described permanent lightning-induced pacemaker dysfunction.

scholarly journals 745 Risk Factors of Incident Renal Stones in Indian Population: A Hospital-Based Case-Control Study

2021 ◽  
Vol 108 (Supplement_2) ◽  
Author(s):  
S Singh ◽  
S Gupta ◽  
T S Mishra ◽  
B D Banerjee ◽  
T Sharma ◽  
...  
Keyword(s):  
Risk Factors ◽  
Heavy Metals ◽  
Case Control Study ◽  
Dietary Habits ◽  
Renal Stones ◽  
Tertiary Hospital ◽  
Case Control ◽  
The Body ◽  
Increased Risk ◽  
Control Study

Abstract Introduction Nephrolithiasis is pathological calcification in the excretory passages of the body and is prevalent among 7.6% of Indians. We aimed to study the various risk factors associated with renal stones from India. Method It was a hospital-based case-control study conducted over 18 months in a tertiary hospital in Delhi. Cases were defined as patients with renal stones diagnosed on the basis of history and radiological examination. Controls were similar to cases in all respects except for the diagnosis and selected from the hospital. A total of 18 risk factors, including age, gender, heavy metals, stress, metabolic factors, alcohol intake, dietary habits, co-morbidities, etc. were assessed. Logistic regression analysis was performed to calculate the strength of the risk associations. Results In the analysis of 60 cases and controls, we found 6 times, 5.5 times, and 2.4 times increased odds of renal stones in patients with increased arsenic, cadmium, and lead concentrations in blood, respectively. Similarly, there are 3 times increased odds of renal stones in patients suffering from stress. Conclusions Exposure to smoke, occupation dust, and contaminated water may lead to an increased ingestion/inhalation of heavy metals like cadmium, arsenic, and predisposing people to an increased risk of renal stones.

Cartesian Scientia and the Human Soul

Vivarium ◽  
2008 ◽  
Vol 46 (3) ◽  
pp. 418-442 ◽  
Author(s):  
Lilli Alanen
Keyword(s):  
Physical Nature ◽  
The Body ◽  
Natural Phenomenon ◽  
Human Soul ◽  
Important Place ◽  
New Science

AbstractDescartes's conception of matter changed the account of physical nature in terms of extension and related quantitative terms. Plants and animals were turned into species of machines, whose natural functions can be explained mechanistically. This article reflects on the consequences of this transformation for the psychology of human soul. In so far the soul is rational it lacks extension, yet it is also united with the body and affected by it, and so it is able to act on extended matter. The article examines Descartes's concept of scientia and his different uses of nature, and argues that there is much more continuity between Aristotelian and Cartesian psychology than is usually recognized when it comes to an explanation of the functions of the embodied human soul. If this makes psychology unfit for inclusion in the new science of nature, its object is still a natural phenomenon and has an important place within scientia as Descartes conceived of it.

scholarly journals Artificial Lightning Strike Tests and Coupled Electrical–Thermal Analysis on Roofing Glazed Tiles of Ancient Buildings

2021 ◽  
Author(s):  
Jingxiao Li ◽  
Zhiling Fang ◽  
Lin Fu ◽  
Shangchen Fu ◽  
Lihua Shi ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Thermal Stress ◽  
High Temperature ◽  
Heat Effect ◽  
Element Model ◽  
Joule Heat ◽  
The Body ◽  
Lightning Strike ◽  
Lightning Current ◽  
Lightning Channel

Abstract Lightning strike is one of the natural disasters to the roof components of ancient buildings. To investigate the causes and damage effects of lightning strikes on the roofing glazed tiles of ancient buildings, artificial lightning strike tests were carried out on glazed tiles. Based on the experiment results, a coupled electrical–thermal finite element model of mortar-containing glazed tiles was established and the Joule heat effect of lightning current was further investigated. The results show that when the lightning channel is attached to the surface of the enamel and body with a low electrical conductivity, the lightning current is mainly released in the form of surface flashover, and a minor damage is induced along the flashover path; when the lightning channel is attached to the mortar with a high electrical conductivity, the lightning current is injected into the mortar, resulting in significant tile damage. The spatial distributions of the temperature present clear gradient characteristics. The high-temperature area appears in the mortar while the high–thermal–stress area appears in the body connected to the grounding rail. As the peak of the lightning current increases, both the high-temperature and high–thermal–stress areas of the glazed tiles expand. The combination of the experiments and the numerical analysis results demonstrate that the damage mechanism of lightning Joule heat effect to glazed tiles may include two aspects. One is the internal explosive force generated from the sharp vaporization and expansion of the moisture inside the tiles due to rapid temperature increase, and the other is the thermal stress caused by the uneven temperature distribution.

Malnutrition: Already exist and is being overlooked?

2021 ◽  
Vol 2 (5) ◽  
pp. 01-08
Author(s):  
Şule Gökçe ◽  
Aslı Aslan ◽  
Feyza Koç
Keyword(s):  
Nutritional Status ◽  
Pediatric Patients ◽  
Feeding Habits ◽  
Tertiary Hospital ◽  
The Body ◽  
Anthropometric Measurements ◽  
Acute Malnutrition ◽  
Cross Sectional ◽  
Negative Effect ◽  
Healthy Growth

Background: Malnutrition is defined as deficiency and or imbalance of nutrients and energy and may produce a negative effect on the growth, maintenance, and specific functions of the body. This study purposed to determine the nutritional situation, to define the presence of malnutrition, to detect the deficiencies of micronutrients of the children admitted to a pediatric tertiary hospital. Methods: A retrospective, cross‑sectional, single unit-based study in pediatric patients admitted to the pediatric wards for differential diagnosis or treatment was conducted between November 2017 and December 2019. The anthropometric measurements were figured out on hospital admission of all pediatric patients. The pediatric patients diagnosed with malnutrition were assessed to detect their nutritional status/feeding habits and to identify any associated factors. Results: A total of 1206 children were hospitalized with an acute illness diagnosis and/or treatment during the study period. One hundred fifteen patients were noted to have malnutrition; acute malnutrition (wasting) (weight for height z-score < - 2 SDS) (n=51/115, 44.3%) and chronic malnutrition (stunted) (height-for-age < −2 SDS) was detected in 64/115 (55.7%) patients; the prevalence of wasting, and stunting was 4.2% and 5.3%, respectively. Conclusions: Our study suggests that it should be performed an assessment of nutritional status/ history and anthropometric measurements every admission to the hospital in order to provide healthy growth development in childhood, particularly under 2 of age and interventions should be strengthened for general child health.

Influence of the Basal Metabolic Profile on the Evolution of the Pediatric Patient with Obesity

2021 ◽  
Author(s):  
Belén Fernández ◽  
Ainhoa Sarasua Miranda ◽  
Isabel Lorente Blázquez ◽  
Ignacio Diez López
Keyword(s):  
Body Composition ◽  
Childhood Obesity ◽  
Pediatric Population ◽  
Tertiary Hospital ◽  
The Body ◽  
Basal Metabolism ◽  
Pediatric Endocrinology ◽  
Simple Method ◽  
Endocrinology Clinic

Childhood obesity is a problem of growing importance globally. It is associated with significant health problems. Knowing how to treat it effectively would improve the quality of life of these children. The aim of this chapter is to study how basal metabolism influences the somatometric evolution of the child and adolescent population with obesity in a pediatric endocrinology clinic. Study childhood obesity in a tertiary hospital by means of a multichannel impedanceometry study. All the patients had a basal metabolism lower than the calculated theoretical ideal. In overall terms, weight reduction is not achieved in this pediatric population. However, it is observed a decrease in fat content in the medium term (1-3 years). Bioelectrical impedanceometry measurement is a simple method in clinical practice to evaluate the energy consumption and the body composition. Knowing the body composition of these children would help to intervene more effectively to help control obesity and its health consequences.

scholarly journals Wearable FES Electrodes

Proceedings ◽  
2019 ◽  
Vol 32 (1) ◽  
pp. 13
Author(s):  
Tyler ◽  
Mavridis
Keyword(s):  
Electrical Stimulation ◽  
Human Skin ◽  
Circuit Design ◽  
The Body ◽  
Product Development Process ◽  
Passive Component ◽  
Electrode Size ◽  
Skin Electrode ◽  
Skin Contact ◽  
Electrode Interface

Functional electrical stimulation (FES) has been used to revitalise the muscles of people suffering from various kinds of injury. However, when human skin is incorporated into electrical circuits, it must not be treated as a passive component. Skin’s electrical properties must be known when electrodes deliver electrical stimulation to the body, whether by hydrogel electrodes or by electrodes embedded in apparel. Failure to address this issue increases the risk of skin burns due to too high current through the skin/electrode interface. We have demonstrated that there is a relationship between electrode size and measured voltage. The rise of voltage with a reduction of electrode size can be explained by the diminution of the skin contact area with resulting higher skin/electrode impedances. Thus, finding an electrical skin model that represents the behaviour of human skin is important for circuit design and the product development process.

scholarly journals From Thermodynamic Entropy to Knowledge Entropy

2020 ◽  
Vol 14 (1) ◽  
pp. 589-596
Author(s):  
Constantin Bratianu
Keyword(s):  
Information Theory ◽  
Knowledge Management ◽  
Open Systems ◽  
Second Law Of Thermodynamics ◽  
The Body ◽  
Natural Phenomenon ◽  
Second Law ◽  
Computational Formula ◽  
Absolute Entropy ◽  
Concept Of Information

AbstractThe purpose of this paper is to present the evolution of the concept of entropy from engineering to knowledge management, going through information theory, linguistic entropy, and economic entropy. The concept of entropy was introduced by Rudolf Clausius in thermodynamics in 1865 as a measure of heat transfer between two solid bodies which have different temperatures. As a natural phenomenon, heat flows from the body with a higher temperature toward the body with a lower temperature. However, Rudolf Clausius defined only the change in entropy of the system and not its absolute entropy. Ludwig Boltzmann defined later the absolute entropy by studying the gas molecules behavior in a thermal field. The computational formula defined by Boltzmann relates the microstates of a thermal system with its macrostates. The more uniform the probability distribution of the microstates is the higher the entropy is. The second law of thermodynamics says that in open systems, when there is no intervention from outside, the entropy of the system increases continuously. The concept of entropy proved to be very powerful, fact for which many researchers tried to extend its semantic area and the application domain. In 1948, Claude E. Shannon introduced the concept of information entropy, having the same computational formula as that defined by Boltzmann, but with a different interpretation. This concept solved many engineering communications problems and is used extensively in information theory. Nicholas Georgescu-Roegen used the concept of entropy and the second law of thermodynamics in economics and business. Today, many researchers in economics use the concept of entropy for analyzing different phenomena. The present paper explores the possibility of using the concept of knowledge entropy in knowledge management.

scholarly journals Forecast of Thunderstorm Cloud Trend Based on Monitoring Data of Thunder Mobile Positioning System

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Mingfa Wu ◽  
Chongjing Yang ◽  
Xiangke Liu
Keyword(s):  
Lightning Discharge ◽  
Monitoring Data ◽  
Practical Significance ◽  
Lightning Strike ◽  
Natural Phenomenon ◽  
Main Task ◽  
Positioning System ◽  
Lightning Strikes ◽  
Thunderstorm Cloud ◽  
Mobile Positioning

As a natural phenomenon, thunder and lightning have a major impact on human production and life. As an important part of lightning protection technology, the main task of the lightning mobile positioning system is to detect and determine the location of lightning and, at the same time, provide more accurate lightning discharge parameters for lightning research. It is a new technology that serves the entire society and is in urgent need of development. This paper aims to study the trend prediction of thunderstorm cloud based on the monitoring data of the thunder and lightning mobile positioning system. In this thesis, the inverse distance-weighted interpolation method can be used to determine the lightning area and the principle of lightning monitoring and positioning, and the classification of lightning and the practical significance of lightning mobile positioning system monitoring are also studied. Finally, the Hurst index of this paper can reveal the trend elements in the time series well through the experiment, so as to judge the lightning strikes. At the same time, it also introduces everyone’s satisfaction survey on the lightning mobile positioning system. The results of this paper show that the lightning mobile positioning system has been widely used in our country’s meteorological monitoring stations, and it plays a very important role in our national defense lightning strikes and effectively realizes the lightning strike prediction in the monitoring process, which can better enable the competent department to take timely and accurate measures to prevent lightning strikes. Experimental analysis shows that the accuracy of the lightning mobile positioning system has reached 92%, and the practicability has reached 88%.

scholarly journals Artificial lightning strike tests and coupled electrical–thermal analysis on roofing glazed tiles of ancient buildings

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Jingxiao Li ◽  
Zhiling Fang ◽  
Lin Fu ◽  
Shangchen Fu ◽  
Lihua Shi ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Thermal Stress ◽  
High Temperature ◽  
Heat Effect ◽  
Element Model ◽  
Joule Heat ◽  
The Body ◽  
Lightning Strike ◽  
Lightning Current ◽  
Lightning Channel

AbstractLightning strike is one of the natural disasters to the roof components of ancient buildings. To investigate the causes and damage effects of lightning strikes on the roofing glazed tiles of ancient buildings, artificial lightning strike tests were carried out on glazed tiles. Based on the experiment results, a coupled electrical–thermal finite element model of mortar-containing glazed tiles was established and the Joule heat effect of lightning current was further investigated. The results show that when the lightning channel is attached to the surface of the enamel and body with a low electrical conductivity, the lightning current is mainly released in the form of surface flashover, and a minor damage is induced along the flashover path; when the lightning channel is attached to the mortar with a high electrical conductivity, the lightning current is injected into the mortar, resulting in significant tile damage. The spatial distributions of the temperature present clear gradient characteristics. The high-temperature area appears in the mortar while the high–thermal–stress area appears in the body connected to the grounding rail. As the peak of the lightning current increases, both the high-temperature and high–thermal–stress areas of the glazed tiles expand. The combination of the experiments and the numerical analysis results demonstrate that the damage mechanism of lightning Joule heat effect to glazed tiles may include two aspects. One is the internal explosive force generated from the sharp vaporization and expansion of the moisture inside the tiles due to rapid temperature increase, and the other is the thermal stress caused by the uneven temperature distribution.

scholarly journals Investigation of Stem Cell Aging Throughout the Lifetime and Therapeutic Opportunities

2020 ◽  
Author(s):  
Sarah Karimi ◽  
Setareh Raoufi ◽  
Zohreh Bagher
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Aging Process ◽  
Cell Function ◽  
Cell Activity ◽  
The Body ◽  
Natural Phenomenon ◽  
Cell Aging ◽  
Molecular Pathways ◽  
Stem Cell Aging

Introduction: Aging is a natural phenomenon that is caused by changes in the cells of the body. Theoretically, aging starts from birth and lasts throughout life. These changes affect the function of the cells. Also, in old tissues, the capacity for homeostasis and tissue repair is decline due to destructive changes in specific tissue stem cells, niche of stem cells and systemic factors that regulate stem cell activity. Understanding molecular pathways that disrupt stem cell function during aging is crucial for the development of new treatments for aging-associated diseases. In this article, the symptoms of stem cell aging and the key molecular pathways that are commonly used for the aging of stem cells were discussed. We will consider experimental evidence for all of the mechanisms and evaluate the way that can slow down or even stop the aging process. Finally, we will look at the aging process of three types of stem cells.

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