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https://www.readbyqxmd.com/read/29052550/an-input-to-state-stability-approach-to-verify-almost-global-stability-of-a-synchronous-machine-infinite-bus-system
#1
Johannes Schiffer, Denis Efimov, Romeo Ortega, Nikita Barabanov
Conditions for almost global stability of an operating point of a realistic model of a synchronous generator with constant field current connected to an infinite bus are derived. The analysis is conducted by employing the recently proposed concept of input-to-state stability (ISS)-Leonov functions, which is an extension of the powerful cell structure principle developed by Leonov and Noldus to the ISS framework. Compared with the original ideas of Leonov and Noldus, the ISS-Leonov approach has the advantage of providing additional robustness guarantees...
August 13, 2017: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/29052542/wide-area-measurement-system-based-supervision-of-protection-schemes-with-minimum-number-of-phasor-measurement-units
#2
Swaroop Gajare, J Ganeswara Rao, O D Naidu, Ashok Kumar Pradhan
Cascade tripping of power lines triggered by maloperation of zone-3 relays during stressed system conditions, such as load encroachment, power swing and voltage instability, has led to many catastrophic power failures worldwide, including Indian blackouts in 2012. With the introduction of wide-area measurement systems (WAMS) into the grids, real-time monitoring of transmission network condition is possible. A phasor measurement unit (PMU) sends time-synchronized data to a phasor data concentrator, which can provide a control signal to substation devices...
August 13, 2017: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/29050400/metformin-reverses-trap1-mutation-associated-alterations-in-mitochondrial-function-in-parkinson-s-disease
#3
Julia C Fitzgerald, Alexander Zimprich, Daniel A Carvajal Berrio, Kevin M Schindler, Brigitte Maurer, Claudia Schulte, Christine Bus, Anne-Kathrin Hauser, Manuela Kübler, Rahel Lewin, Dheeraj Reddy Bobbili, Lisa M Schwarz, Evangelia Vartholomaiou, Kathrin Brockmann, Richard Wüst, Johannes Madlung, Alfred Nordheim, Olaf Riess, L Miguel Martins, Enrico Glaab, Patrick May, Katja Schenke-Layland, Didier Picard, Manu Sharma, Thomas Gasser, Rejko Krüger
The mitochondrial proteins TRAP1 and HTRA2 have previously been shown to be phosphorylated in the presence of the Parkinson's disease kinase PINK1 but the downstream signalling is unknown. HTRA2 and PINK1 loss of function causes parkinsonism in humans and animals. Here, we identified TRAP1 as an interactor of HTRA2 using an unbiased mass spectrometry approach. In our human cell models, TRAP1 overexpression is protective, rescuing HTRA2 and PINK1-associated mitochondrial dysfunction and suggesting that TRAP1 acts downstream of HTRA2 and PINK1...
September 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29043087/sleepiness-while-driving-and-shiftwork-patterns-among-korean-bus-drivers
#4
Seyoung Lee, Hyoung-Ryoul Kim, Junsu Byun, Taewon Jang
BACKGROUND: Sleepiness while driving has been regarded as a major cause of death due to traffic accidents. We compared the degree of sleepiness across five different working time periods (first, morning, post-lunch, afternoon, and last) among Korean bus drivers with different shift types (Daily two shift/Alternating day shift). METHOD: We interviewed 332 bus drivers with two shift types (Daily two shift, 128; Alternating day shift, 204). The questionnaire included demographic information (age, alcohol consumption and history of disease), a sleep disorder diagnosed by a doctor, job duration, the number of workdays in the past month, average working hours per workday and week, sleepiness while driving (Karolinska Sleepiness Scale), and sleeping time for both workdays and off-days...
2017: Annals of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29040357/environmental-context-influences-visual-attention-to-responsible-drinking-messages
#5
Daniel Frings, Antony C Moss, Ian P Albery, Guleser Eskisan, Thomas D W Wilcockson, Alexander P Marchant
Aims: Responsible drinking messages (RDMs) are used as a key tool to reduce alcohol-related harms. A common form of RDM is in a poster format displayed in places such as bars, bus stops and toilet cubicles. However, evidence for the effectiveness of RDMs remains limited. Moreover, it is not known how environmental contexts (e.g. the number of alcohol-related cues in the environment) impact how such RDMs are interacted with, nor how this in turn affects their efficacy. Methods: One hundred participants completed a pseudo taste preference task in either in a bar laboratory (alcohol cue rich environmental context) or a traditional laboratory...
October 13, 2017: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
https://www.readbyqxmd.com/read/29025826/patient-characteristics-of-the-accident-and-emergency-department-of-kenyatta-national-hospital-nairobi-kenya-a-cross-sectional-prospective-analysis
#6
Justin Guy Myers, Katherine M Hunold, Karen Ekernas, Ali Wangara, Alice Maingi, Vincent Mutiso, Stephen Dunlop, Ian B K Martin
BACKGROUND: Resource-limited settings are increasingly experiencing a 'triple burden' of disease, composed of trauma, non-communicable diseases (NCDs) and known communicable disease patterns. However, the epidemiology of acute and emergency care is not well characterised and this limits efforts to further develop emergency care capacity. OBJECTIVE: To define the burden of disease by describing the patient population presenting to the Accident and Emergency Department (A&E) at Kenyatta National Hospital (KNH) in Kenya...
October 11, 2017: BMJ Open
https://www.readbyqxmd.com/read/29019949/distributed-state-estimation-using-a-modified-partitioned-moving-horizon-strategy-for-power-systems
#7
Tengpeng Chen, Yi Shyh Eddy Foo, K V Ling, Xuebing Chen
In this paper, a distributed state estimation method based on moving horizon estimation (MHE) is proposed for the large-scale power system state estimation. The proposed method partitions the power systems into several local areas with non-overlapping states. Unlike the centralized approach where all measurements are sent to a processing center, the proposed method distributes the state estimation task to the local processing centers where local measurements are collected. Inspired by the partitioned moving horizon estimation (PMHE) algorithm, each local area solves a smaller optimization problem to estimate its own local states by using local measurements and estimated results from its neighboring areas...
October 11, 2017: Sensors
https://www.readbyqxmd.com/read/29019642/spine-conditions-occupational-spine-conditions
#8
Marc A Childress
Neck and back conditions have significant effects on employee health and productivity. More than $7 billion in lost revenue in the United States annually can be attributed to workplace back pain among employees ages 40 to 65 years. According to the Bureau of Labor Statistics, in 2012 back pain was the most prevalent musculoskeletal condition resulting in workplace absenteeism. The incidence of these conditions is higher among individuals in certain professions, such as bus drivers, police officers, and correctional officers...
October 2017: FP Essentials
https://www.readbyqxmd.com/read/28993882/commuter-exposure-to-fine-and-ultrafine-particulate-matter-in-vienna
#9
Georg Strasser, Stefan Hiebaum, Manfred Neuberger
Mass concentrations PM10, PM2.5, PM1, particle number concentrations of ultrafine particles and lung deposited surface area were measured during commutes with a subway, tram, bus, car and bicycle in Vienna for the first time. Obtained data were examined for significant differences in personal exposure when using various transport modalities along similar routes. Mean PM2.5 and PM1 mass concentrations were significantly higher in the subway when compared to buses. Mean PM10, PM2.5 and PM1 mass concentrations were significantly higher in the subway when compared to cars using low ventilation settings...
October 9, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28992796/subcortical-gray-matter-atrophy-is-associated-with-cognitive-deficit-in-multiple-sclerosis-but-not-in-systemic-lupus-erythematosus-patients
#10
A Kalinowska-Łyszczarz, M A Pawlak, A Pietrzak, K Pawlak-Buś, P Leszczyński, M Puszczewicz, D Majewski, W Paprzycki, W Kozubski, S Michalak
Cognitive impairment is a significant clinical problem both in multiple sclerosis (MS) and systemic lupus erythematosus (SLE) patients. In MS cognitive dysfunction has been associated with brain atrophy and total demyelinating lesion volume. In SLE cognitive impairment is much less understood, and its link to structural brain damage remains to be established. The aim of this study was to identify the relationship between subcortical gray matter volume and cognitive impairment in MS and SLE. We recruited 37 MS and 38 SLE patients matched by age, disease duration and educational level...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28991919/optimal-coordinated-voltage-control-in-active-distribution-networks-using-backtracking-search-algorithm
#11
Tengku Juhana Tengku Hashim, Azah Mohamed
The growing interest in distributed generation (DG) in recent years has led to a number of generators connected to a distribution system. The integration of DGs in a distribution system has resulted in a network known as active distribution network due to the existence of bidirectional power flow in the system. Voltage rise issue is one of the predominantly important technical issues to be addressed when DGs exist in an active distribution network. This paper presents the application of the backtracking search algorithm (BSA), which is relatively new optimisation technique to determine the optimal settings of coordinated voltage control in a distribution system...
2017: PloS One
https://www.readbyqxmd.com/read/28991422/emission-standards-public-transit-and-infant-health
#12
Nicole S Ngo
Transit buses are an integral part of urban life. They reduce externalities generated from private vehicles and increase geographic mobility. However, unlike most private vehicles in the United States, they use diesel fuel and emit higher amounts of toxic pollutants. The U.S. Environmental Protection Agency set emission standards for transit buses starting in 1988 that have been continually updated, but their public health and economic impacts are unclear due to scarce emissions data. I construct a novel panel dataset for the New York City (NYC) Transit bus fleet between 1990 and 2009 and examine the impact of bus pollution on infant health by using bus vintage as a proxy for emissions...
2017: Journal of Policy Analysis and Management
https://www.readbyqxmd.com/read/28990362/an-explorative-study-on-the-validity-of-various-definitions-of-a-2%C3%A2-2%C3%A2-c-temperature-threshold-as-warning-signal-for-impending-diabetic-foot-ulceration
#13
Anke M Wijlens, Samantha Holloway, Sicco A Bus, Jaap J van Netten
Home monitoring of skin temperature is effective to prevent diabetic foot ulceration. We explored the validity of various definitions for the >2·2°C left-to-right threshold used as a warning signal for impending ulceration. Twenty patients with diabetes and peripheral neuropathy monitored their skin temperature with an infrared thermometer at the plantar hallux, metatarsal heads, midfoot and heel four times a day for 6 consecutive days. Environmental temperature and walking activity were monitored and associated with foot temperature...
October 9, 2017: International Wound Journal
https://www.readbyqxmd.com/read/28989271/the-causal-effect-of-bus-rapid-transit-on-changes-in-transit-ridership
#14
Orion T Stewart, Anne Vernez Moudon, Brian E Saelens
Numerous studies have reported ridership increases along routes when Bus rapid transit (BRT) replaces conventional bus service, but these increases could be due simply to broader temporal trends in transit ridership. To address this limitation, we compared changes in ridership among routes where BRT was implemented to routes where BRT was planned or already existed in King County, Washington. Ridership was measured at 2010, 2013, and 2014. Ridership increased by 35% along routes where BRT was implemented from 2010 to 2013 compared to routes that maintained conventional bus service...
2017: Journal of Public Transportation
https://www.readbyqxmd.com/read/28985487/lower-extremity-dynamics-of-walking-in-neuropathic-diabetic-patients-who-wear-a-forefoot-offloading-shoe
#15
Sicco A Bus, Josina C Maas, Nicoline M Otterman
BACKGROUND: A forefoot-offloading shoes has a negative-heel rocker outsole and is used to treat diabetic plantar forefoot ulcers, but its mechanisms of action and their association with offloading and gait stability are not sufficiently clear. METHODS: Ten neuropathic diabetic patients were tested in a forefoot-offloading shoe and subsequently in a control shoe with no specific offloading construction, both worn on the right foot (control shoe on left), while walking at 1...
October 2, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28981508/optimizing-a-desirable-fare-structure-for-a-bus-subway-corridor
#16
Bing-Zheng Liu, Ying-En Ge, Kai Cao, Xi Jiang, Lingyun Meng, Ding Liu, Yunfeng Gao
This paper aims to optimize a desirable fare structure for the public transit service along a bus-subway corridor with the consideration of those factors related to equity in trip, including travel distance and comfort level. The travel distance factor is represented by the distance-based fare strategy, which is an existing differential strategy. The comfort level one is considered in the area-based fare strategy which is a new differential strategy defined in this paper. Both factors are referred to by the combined fare strategy which is composed of distance-based and area-based fare strategies...
2017: PloS One
https://www.readbyqxmd.com/read/28974669/non-exertional-heatstroke-a-case-report-and-review-of-the-literature
#17
Chiara Mozzini, Giovanni Xotta, Ulisse Garbin, Anna Maria Fratta Pasini, Luciano Cominacini
BACKGROUND Heatstroke (HS) is a life-threatening condition characterized by an elevation of the core body temperature above 40°C, central nervous system dysfunction, and possible multi-organ failure. HS can trigger systemic inflammation, disseminated intravascular coagulation (DIC), rhabdomyolysis, cerebral edema and seizures, pulmonary edema, heart dysfunctions, and renal and hepatic failure. CASE REPORT We report the case of a 41-year-old Romanian woman with a history of alcoholism who developed HS after arriving by bus in Verona, Italy in June 2016...
October 4, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28971031/using-bayesian-model-to-estimate-the-cost-of-traffic-injuries-in-iran-in-2013
#18
Elaheh Ainy, Hamid Soori, Mojtaba Ganjali, Ayad Bahadorimonfared
BACKGROUND AND AIM: A significant social and economic burden inflicts by road traffic injuries (RTIs). We aimed to use Bayesian model, to present the precise method, and to estimate the cost of RTIs in Iran in 2013. MATERIALS AND METHODS: In a cross-sectional study on costs resulting from traffic injuries, 846 people per road user were randomly selected and investigated during 3 months (1(st) September-1(st) December) in 2013. The research questionnaire was prepared based on the standard for willingness to pay (WTP) method considering perceived risks, especially in Iran...
July 2017: International Journal of Critical Illness and Injury Science
https://www.readbyqxmd.com/read/28962520/editor-s-highlight-complete-attenuation-of-mouse-lung-cell-proliferation-and-tumorigenicity-in-cyp2f2-knockout-and-cyp2f1-humanized-mice-exposed-to-inhaled-styrene-for-up-to-2%C3%A2-years-supports-a-lack-of-human-relevance
#19
George Cruzan, James S Bus, Marcy I Banton, Satinder S Sarang, Robbie Waites, Debra B Layko, James Raymond, Darol Dodd, Melvin E Andersen
Styrene is a mouse-specific lung carcinogen, and short-term mode of action studies have demonstrated that cytotoxicity and/or cell proliferation, and genomic changes are dependent on CYP2F2 metabolism. The current study examined histopathology, cell proliferation, and genomic changes in CD-1, C57BL/6 (WT), CYP2F2(-/-) (KO), and CYP2F2(-/-) (CYP2F1, 2B6, 2A13-transgene) (TG; humanized) mice following exposure for up to 104 weeks to 0- or 120-ppm styrene vapor. Five mice per treatment group were sacrificed at 1, 26, 52, and 78 weeks...
October 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28957197/whispering-gallery-germanium-on-silicon-photodetector
#20
Zhan Su, Ehsan Shah Hosseini, Erman Timurdogan, Jie Sun, Michele Moresco, Gerald Leake, Thomas N Adam, Douglas D Coolbaugh, Michael R Watts
We design and demonstrate, to the best of our knowledge, the first whispering gallery germanium-on-silicon photodetector with evanescent coupling from a silicon bus waveguide in a CMOS-compatible process. The small footprint (63.6  μm(2)), high responsivity (∼1.04  A/W at 1530 nm), low bias voltage (-1  V), low dark current (2.03 nA), and large optoelectric bandwidth (32.9 GHz) of the detector enable simultaneous wavelength filtering and power detection, ideal for handling large network data traffic...
August 1, 2017: Optics Letters
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