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https://www.readbyqxmd.com/read/28227850/a-kalman-filter-to-estimate-altitude-change-during-a-fall
#1
Michael C Stevens, Wei Lu, Changhong Wang, Stephen J Redmond, Nigel H Lovell, Michael C Stevens, Wei Lu, Changhong Wang, Stephen J Redmond, Nigel H Lovell, Changhong Wang, Wei Lu, Stephen J Redmond, Nigel H Lovell, Michael C Stevens
Barometers have been incorporated into fall detectors in order to enhance the accuracy of fall detection algorithms, however they are power-hungry devices. We present an offline evaluation of a Kalman filter (KF) for estimating the pressure change during a fall that enables low-power operation of the barometer. The KF takes advantage of the fact that a semi-permeable air membrane on a waterproof fall detector enclosure causes a delay in the equilibrium between internal and external enclosure pressure, and this delay enables the barometer to be switched off until a free-fall is detected...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226991/noninvasive-health-condition-monitoring-device-for-workers-at-high-altitudes-conditions
#2
Pablo Aqueveque, Cristopher Gutierrez, Francisco Saavedra, Esteban J Pino, Pablo Aqueveque, Cristopher Gutierrez, Francisco Saavedra, Esteban J Pino, Cristopher Gutierrez, Francisco Saavedra, Pablo Aqueveque, Esteban J Pino
This work presents the design and implementation of a continuous monitoring device to control the health state of workers, for instance miners, at high altitudes. The extreme ambient conditions are harmful for peoples' health; therefore a continuous control of the workers' vital signs is necessary. The developed system includes physiological variables: electrocardiogram (ECG), respiratory activity and body temperature (BT), and ambient variables: ambient temperature (AT) and relative humidity (RH). The noninvasive sensors are incorporated in a t-shirt to deliver a functional device, and maximum comfort to the users...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226913/low-power-operation-of-a-barometric-pressure-sensor-for-use-in-an-automatic-fall-detector
#3
Wei Lu, Changhong Wang, Michael C Stevens, Stephen J Redmond, Nigel H Lovell, Wei Lu, Changhong Wang, Michael C Stevens, Stephen J Redmond, Nigel H Lovell, Changhong Wang, Nigel H Lovell, Wei Lu, Stephen J Redmond, Michael C Stevens
The use of a barometric pressure sensor in a wearable fall detector has been shown to improve the detection accuracy by determining the altitude change associated with the fall event. However, the barometer is a high-power-consuming sensor. This paper proposes a fall detection approach using a hermetically sealed and waterproof enclosure incorporating a small window covered by a semi-permeable membrane (SPM) to delay the equilibrium of internal and external pressures. This feature can be utilized to limit the time the barometer is powered but still capturing critical pressure information to discriminate fall and non-fall events...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224062/correction-hydration-status-as-a-predictor-of-high-altitude-mountaineering-performance
#4
Eric Ladd, Katherine M Shea, Patrick Bagley, Sean Rundell, Paul S Auerbach, Elizabeth A Pirrotta, Ewen Wang, Grant S Lipman
[This corrects the article DOI: 10.7759/cureus.918.].
February 16, 2017: Curēus
https://www.readbyqxmd.com/read/28222645/total-intravenous-anesthesia-produces-outcomes-superior-to-those-with-combined-intravenous-inhalation-anesthesia-for-laparoscopic-gynecological-surgery-at-high-altitude
#5
Rui Xu, Shuqin Zhou, Jin Yang, Haiyan Li, Qingguo Zhang, Guohong Zhang, Shiyuan Xu, Qing Peng
Objective We compared efficacy and adverse outcomes following totally intravenous anesthesia (TIVA) versus combined intravenous-inhalation anesthesia (CIVIA) on hemodynamics and postoperative recovery following laparoscopic gynecological (LG) surgery at high altitudes. Methods We enrolled 80 ASA I or II patients scheduled for LG surgery and randomly assigned them to TIVA with propofol (group P, n = 40) or CIVIA with isoflurane (group I, n = 40). Mean arterial pressure, heart rate, pulse oxygen saturation, and partial pressure of end-tidal carbon dioxide were measured at various time points...
February 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28222154/a-non-synonymous-snp-with-the-allele-frequency-correlated-with-the-altitude-may-contribute-to-the-hypoxia-adaptation-of-tibetan-chicken
#6
Sichen Li, Diyan Li, Xiaoling Zhao, Yan Wang, Huadong Yin, Lanyun Zhou, Chengling Zhong, Qing Zhu
The hypoxia adaptation to high altitudes is of considerable interest in the biological sciences. As a breed with adaptability to highland environments, the Tibetan chicken (Gallus gallus domestics), provides a biological model to search for genetic differences between high and lowland chickens. To address mechanisms of hypoxia adaptability at high altitudes for the Tibetan chicken, we focused on the Endothelial PAS domain protein 1 (EPAS1), a key regulatory factor in hypoxia responses. Detected were polymorphisms of EPAS1 exons in 157 Tibetan chickens from 8 populations and 139 lowland chickens from 7 breeds...
2017: PloS One
https://www.readbyqxmd.com/read/28221293/orbital-emphysema-as-a-rare-complication-of-retina-surgery
#7
Lourdes Rodríguez-Cabrera, José L Rodríguez-Loaiza, José L Tovilla-Canales, Francisca Zuazo
Three patients with a history of previous pars-plana vitrectomy, 2 of them with perfluoropropane, and 1 with sulfur hexafluoride used, experienced eyelid swelling and pain after travelling to a higher altitude city. Gas was found in the orbit and periocular tissues, causing orbital compartment syndrome in 2 of the patients. The gas persisted on these patients despite surgical intervention, so hyperbaric oxygen therapy was advised. One patient refused, the other patient responded well to this therapy and the gas disappeared...
February 17, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28220255/phenological-patterns-of-flowering-across-biogeographical-regions-of-europe
#8
Barbara Templ, Matthias Templ, Peter Filzmoser, Annamária Lehoczky, Eugenija Bakšienè, Stefan Fleck, Hilppa Gregow, Sabina Hodzic, Gunta Kalvane, Eero Kubin, Vello Palm, Danuta Romanovskaja, Višnja Vucˇetic, Ana Žust, Bálint Czúcz
Long-term changes of plant phenological phases determined by complex interactions of environmental factors are in the focus of recent climate impact research. There is a lack of studies on the comparison of biogeographical regions in Europe in terms of plant responses to climate. We examined the flowering phenology of plant species to identify the spatio-temporal patterns in their responses to environmental variables over the period 1970-2010. Data were collected from 12 countries along a 3000-km-long, North-South transect from northern to eastern Central Europe...
February 20, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28219411/using-the-hierarchical-ordinal-regression-model-to-analyse-the-intensity-of-urinary-schistosomiasis-infection-in-school-children-in-lusaka-province-zambia
#9
Christopher Simoonga, Lawrence N Kazembe
BACKGROUND: Urinary schistosomiasis has been a major public health problem in Zambia for many years. However, the disease profile may vary in different locale due to the changing ecosystem that contributes to the risk of acquiring the disease. The objective of this study was to quantify risk factors associated with the intensity of urinary schistosomiasis infection in school children in Lusaka Province, Zambia, in order to better understand local transmission. METHODS: Data were obtained from 1 912 school children, in 20 communities, in the districts of Luangwa and Kafue in Lusaka Province...
February 21, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28219092/-analysis-of-cardiovascular-risk-factors-in-young-backcountry-skiers-in-the-gotthard-region
#10
Benedikt Andreas Gasser
Background and Objectives Although the frequency of cardiovascular events, especially the end manifestation of myocardial infarction, has decreased in recent years, cardiovascular disease continues to be one of the most frequent illnesses. Also it is known that the cardiac system sustains more stress at high altitudes than it does at intermediate altitudes. This leads to the question if young alpinists should undergo cardiac evaluation before setting out for a trip to the Himalayas or the Andes Mountains...
February 20, 2017: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/28218771/travel-during-pregnancy-considerations-for-the-obstetric-provider
#11
Kathleen M Antony, Deborah Ehrenthal, Ann Evensen, J Igor Iruretagoyena
Importance: Travel among US citizens is becoming increasingly common, and travel during pregnancy is also speculated to be increasingly common. During pregnancy, the obstetric provider may be the first or only clinician approached with questions regarding travel. Objective: In this review, we discuss the reasons women travel during pregnancy, medical considerations for long-haul air travel, destination-specific medical complications, and precautions for pregnant women to take both before travel and while abroad...
February 2017: Obstetrical & Gynecological Survey
https://www.readbyqxmd.com/read/28217836/range-shifting-species-reduce-phylogenetic-diversity-in-high-latitude-communities-via-competition
#12
Robert Fitt, Lesley T Lancaster
Under anthropogenic climate change, many species are expanding their ranges to higher latitudes and altitudes, resulting in novel species interactions. The consequences of these range shifts for native species, patterns of local biodiversity, and community structure in high latitude ecosystems are largely unknown but critical to understand in light of widespread poleward expansions by many warm-adapted generalists. Using niche modelling, phylogenetic methods, and field and laboratory studies, we investigated how colonisation of Scotland by a range expanding damselfly, Ischnura elegans, influences patterns of competition and niche shifts in native damselfly species, and changes in phylogenetic community structure...
February 19, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28217519/prevalence-of-vitamin-d-deficiency-and-associated-risk-factors-among-children-residing-at-high-altitude-in-shimla-district-himachal-pradesh-india
#13
Umesh Kapil, Ravindra Mohan Pandey, Ravinder Goswami, Brij Sharma, Neetu Sharma, Lakshmy Ramakrishnan, Gajendra Singh, Neha Sareen, Hem Chandra Sati, Aakriti Gupta, Nighat Yaseen Sofi
INTRODUCTION: Vitamin D is important for bone development in children. A high prevalence of Vitamin D deficiency (VDD) has been documented from different parts of India. However, limited data are available on VDD among children residing at high altitude region of country. OBJECTIVES: To assess the prevalence of VDD and associated risk factors among children in the age group of 6-18 years in Shimla, Himachal Pradesh. METHODS: A community-based cross-sectional study was conducted in the year 2014-2015...
January 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28217514/high-incidence-of-abnormal-glucose-metabolism-in-acute-coronary-syndrome-patients-at-a-moderate-altitude-a-sub-himalayan-study
#14
Jitender Mokta, Subash Kumar, Neeraj Ganju, Kiran Mokta, Prashant Kumar Panda, Swatantra Gupta
BACKGROUND: Abnormal glucose metabolic status at admission is an important marker of future cardiovascular events and long-term mortality after acute coronary syndrome (ACS), whether or not they are known diabetics. OBJECTIVE: The aims were to study the prevalence of abnormal glucose metabolism in ACS patients and to compare the different methods of diagnosing diabetes in ACS patients. METHODS: We did a prospective study. About 250 consecutive nondiabetic patients (200 men and 50 women) with ACS admitted to a tertiary care institute of Himachal Pradesh in 1 year were enrolled...
January 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28217131/incomplete-infection-of-secondarily-infected-potato-plants-an-environment-dependent-underestimated-mechanism-in-plant-virology
#15
Lukas Bertschinger, Lukas Bühler, Brice Dupuis, Brion Duffy, Cesare Gessler, Gregory A Forbes, Ernst R Keller, Urs C Scheidegger, Paul C Struik
The common assumption in potato virus epidemiology is that all daughter tubers produced by plants coming from infected mother tubers (secondary infection) will become infected via systemic translocation of the virus during growth. We hypothesize that depending on the prevalent environmental conditions, only a portion of the daughter tubers of a plant that is secondarily infected by viruses may become infected. To test this hypothesis experimental data from standardized field experiments were produced in three contrasting environments at 112, 3280, and 4000 m a...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28216727/high-altitude-dermatology
#16
Lt Col G K Singh
Approximately, 140 million people worldwide live permanently at high altitudes (HAs) and approximately another 40 million people travel to HA area (HAA) every year for reasons of occupation, sports or recreation. In India, whole of Ladakh region, part of Northwest Kashmir, Northern part of Sikkim and Tenga valley of Arunachal are considered inhabited areas of HAA. The low quantity of oxygen, high exposure of ultraviolet (UV) light, very low humidity, extreme subzero temperature in winter, high wind velocity, make this region difficult for lowlanders as well as for tourists...
January 2017: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/28212552/association-between-single-nucleotide-polymorphisms-in-adrb2-gnb3-and-gstp1-genes-and-high-altitude-pulmonary-edema-hape-in-the-chinese-han-population
#17
Yongjun He, Lijun Liu, Pengcheng Xu, Na He, Dongya Yuan, Longli Kang, Tianbo Jin
High altitude pulmonary edema (HAPE) occurs mainly under conditions such as high altitude, rapid ascent, or hypoxia. Previous studies suggest that ADRB2, GNB3, TH, and GSTP1 polymorphisms are associated with various lung diseases. We evaluated whether those polymorphisms are associated with the risk of HAPE in a Chinese Han population. ADRB2, GNB3, TH and GSTP1 polymorphisms were genotyped using a Sequenom MassARRAY. Logistic regression, adjusted for age and gender, was used to evaluate the association between the genotypes and the risk of HAPE by computing odds ratios (ORs) and 95% confidence intervals (95% CIs)...
February 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/28212458/chemical-composition-variability-of-essential-oils-of-daucus-gracilis-steinh-from-algeria
#18
Batoul Benyelles, Hocine Allali, Mohamed El Amine Dib, Nassim Djabou, Julien Paolini, Jean Costa
The chemical compositions of 20 Algerian Daucus gracilis essential oils were investigated using GC-FID, GC/MS, and NMR analyses. Altogether, 47 compounds were identified, accounting for 90-99% of the total oil compositions. The main components were linalool (18; 12.5-22.6%), 2-methylbutyl 2-methylbutyrate (20; 9.2-20.2%), 2-methylbutyl isobutyrate (10; 4.2-12.2%), ammimajane (47; 2.6-37.1%), (E)-β-ocimene (15; 0.2-12.8%) and 3-methylbutyl isovalerate (19; 3.3-9.6%). The chemical composition of the essential oils obtained from separate organs was also studied...
February 17, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28212017/increased-electron-accepting-and-decreased-electron-donating-capacities-of-soil-humic-substances-in-response-to-increasing-temperature
#19
Wenbing Tan, Beidou Xi, Guoan Wang, Jie Jiang, Xiao-Song He, Xuhui Mao, Ru-Tai Gao, Cai-Hong Huang, Hui Zhang, Dan Li, Yufu Jia, Ying Yuan, Xinyu Zhao
The electron transfer capacities (ETC) of soil humic substances (HS) are linked to the type and abundance of redox-active functional moieties in their structure. Natural temperature can affect the chemical structure of natural organic matter by regulating their oxidative transformation and degradation in soils. However, it is unclear if there is a direct correlation between ETC of soil HS and mean annual temperature. In this study, we assess the response of the electron accepting and electron donating capacities (EAC and EDC) of soil HS to temperature by analyzing HS extracted from soil sets along glacial-interglacial cycles through loess-palaeosol sequences and along natural temperature gradients through latitude and altitude transects...
February 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28211323/evaluation-the-urban-atmospheric-conditions-in-different-cities-using-comet-and-micronuclei-assay-in-tradescantia-pallida
#20
Juliana Caroline Vivian Sposito, Bruno do Amaral Crispim, Amanda Izadora Romãn, Rosilda Mara Mussury, Joelson Gonçalves Pereira, Leonardo Oliveira Seno, Alexeia Barufatti Grisolia
In the present study, genotoxicity and mutagenicity were investigated in Tradescantia pallida exposed to vehicular traffic at different sites in a high-altitude tropical climate. During March, May, July, September, and November 2014, a comet assay and micronucleus bioassays were conducted on young inflorescences and leaves of T. pallida collected from twelve towns in the southern region of Mato Grosso do Sul with different amounts of vehicular traffic. Weather parameters (temperature, relative humidity and rainfall) were measured and vehicles were counted to determine traffic levels in each town...
February 1, 2017: Chemosphere
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