Efficient Predictive Flight Control

Eran D.B. Medagoda,Peter W. Gibbens 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10

This paper introduces an efficient predictive control algorithm applied to aircraft flight control. The algorithm is based on characterizing the predicted response of the system though the use of a direct solution to the state transition matrix found via Eigen-values and Eigen-vectors. The structure and formulation of the controller is discussed in some detail, as well as its application in constrained and unconstrained systems. An overview of tuning guidelines is presented with respect to desired length of the prediction horizon, the number of prediction points and system weights. Demonstration of the proposed predictive control algorithm on a numerical aircraft simulation will be performed comparing the performance of the aircraft under various configurations.

Failure of Tuberculosis Control : A Prescription for Change

Bellin, Eran MediMedia Korea 1994 JAMA-Korea Vol.9 No.7

Auricular acupuncture for sleep quality in participants with mental and behavioral disorders due to prior multiple drug use: a retrospective consecutive case series

Yuri Gimelfarb,Eran Goldstien 영남대학교 의과대학 2023 Yeungnam University Journal of Medicine Vol.40 No.1

Background: Poor sleep quality is associated with psychoactive substance abuse/addiction/withdrawal. Auricular acupuncture (AA) is a nonpharmacological method used for the treatment of sleep disturbances. This study aimed to examine the quality of sleep before and after AA in participants with mental and behavioral disorders due to prior multiple drug use in the therapeutic community. Methods: This was a consecutive case series of 27 participants (25 male [92.6%]). The median age was 35.0 years (interquartile range [IQR], 29.0–37.2 years), methadone/buprenorphine were not used, and the participants were treated with AA (median number of treatments, 15.0 [IQR, 12.0–18.0]) during a median period of 51.0 days (IQR, 49.0–51.0 days) according to the National Acupuncture Detoxification Association (NADA)-Acudetox protocol. Sleep quality was determined using the Pittsburgh Sleep Quality Index (PSQI), a self-rated questionnaire that assesses sleep quality and disturbances over a 1-month interval. Results: The global PSQI score dropped (indicating better sleep quality) by a median of 3.0 points (IQR, 0.0–8.0 points) after treatment. In the multivariate logistic regression analysis, with an increase in global PSQI score during AA by 1 point, there was a 0.73-fold reduction in the risk of poor sleep quality post-AA (adjusted odds ratio, 0.73; 95% confidence interval, 0.52–1.01; p<0.055; Nagelkerke’s R2=0.66). Conclusion: The results revealed a positive effect of AA (by the NADA-Acudetox protocol) on sleep quality (as measured by PSQI) among participants in a treatment center with mental and behavioral disorders due to multiple drug use.

Acute frame coil migration during filling coil retrieval in a cerebral aneurysm embolization case: A possible result of a venturi effect?

Doron Omer,Meirowitz Eran,Abergel Eitan 대한뇌혈관외과학회 2022 Journal of Cerebrovascular and Endovascular Neuros Vol.24 No.1

Coil migration is a known complication of endovascular coiling of cerebral aneurysms. We report an acute coil migration occurring during coiling of an unruptured anterior choroidal aneurysm, while a separate coil was retrieved into the microcatheter concomitantly without direct contact between the coils. The “pulling” of a previously deployed stable coil is presented as an adverse effect that should be noted. This case exemplifies that not only direct entanglement or erroneous malposition can generate acute migration, but possibly, also alteration of physical forces during coil retrieval. A potential mechanism, similar to a venturi effect, caused by a quick suction within the microcatheter at its distal end, is suggested, and the clinical relevance of the case is discussed.

Low melting temperature of anhydrous mantle materials at the core–mantle boundary

Taehyun Kim,Byeongkwan Ko,Eran Greenberg,Vitali Prakapenka,Sang-Heon Shim,Yongjae Lee 대한지질학회 2019 대한지질학회 학술대회 Vol.2019 No.10

Does Liver Resection Provide Long-Term Survival Benefits for Breast Cancer Patients with Liver Metastasis? A Question Yet to Be Answered

Ser Yee Lee,Eran Sadot 연세대학교의과대학 2015 Yonsei medical journal Vol.56 No.1

Functional Shifts in Unvegetated, Perhumid, Recently-Deglaciated Soils Do Not Correlate with Shifts in Soil Bacterial Community Composition

Sarah R. Sattin,Cory C. Cleveland,Eran Hood,Sasha C. Reed,Andrew J. King,Steven K. Schmidt,Michael S. Robeson,Nataly Ascarrunz,Diana R. Nemergut 한국미생물학회 2009 The journal of microbiology Vol.47 No.6

Past work in recently deglaciated soils demonstrates that microbial communities undergo shifts prior to plant colonization. To date, most studies have focused on relatively ‘long’ chronosequences with the ability to sample plant-free sites over at least 50 years of development. However, some recently deglaciated soils feature rapid plant colonization and questions remain about the relative rate of change in the microbial community in the unvegetated soils of these chronosequences. Thus, we investigated the forelands of the Mendenhall Glacier near Juneau, AK, USA, where plants rapidly establish. We collected unvegetated samples representing soils that had been ice-free for 0, 1, 4, and 8 years. Total nitrogen (N) ranged from 0.00~0.14 mg/g soil, soil organic carbon pools ranged from 0.6~2.3 mg/g soil, and both decreased in concentration between the 0 and 4 yr soils. Biologically available phosphorus (P) and pH underwent similar dynamics. However, both pH and available P increased in the 8 yr soils. Nitrogen fixation was nearly undetectable in the most recently exposed soils, and increased in the 8 yr soils to ~5 ng N fixed/cm2/h, a trend that was matched by the activity of the soil N-cycling enzymes urease and β-1,4-N-acetyl-glucosaminidase. 16S rRNA gene clone libraries revealed no significant differences between the 0 and 8 yr soils; however, 8 yr soils featured the presence of cyanobacteria, a division wholly absent from the 0 yr soils. Taken together, our results suggest that microbes are consuming allochtonous organic matter sources in the most recently exposed soils. Once this carbon source is depleted, a competitive advantage may be ceded to microbes not reliant on in situ nutrient sources.

Thrombophilia, Left Ventricular Dysfunction and Intracardiac Thrombi in Children

Ibrahim Abu-Kishk,Shaul Baram,Eran Kozer,Baruch Klin,Gideon Eshel 대한심장학회 2011 Korean Circulation Journal Vol.41 No.8

Background and Objectives: Reports on the incidence of intracardiac thrombi (ICT) have increased over the last few decades, but ICT are still relatively rare among children. Left ventricular systolic dysfunction and dilatation may contribute to the formation of ICT, especially when a hypercoagulable state exists. The aim of this study was to describe the incidence of ICT in children suffering from cardiac failure with left ventricular dysfunction and to identify risk factors on admission for developing ICT. Subjects and Methods: We conducted a retrospective chart review of children up to 18 years of age admitted to the Pediatric Intensive Care Unit due to cardiac failure with left ventricular dysfunction between January 1, 2003 and December 31, 2008. Results: Twenty-one patients were admitted with clinical signs of cardiac failure and echocardiographic findings compatible with dilated cardiomyopathy or acute myocarditis. Dilated cardiomyopathy was diagnosed in 11 patients (52%). Adenoviruses and enteroviruses were suspected to be the cause of acute myocarditis in 5 cases. The personal or family history of hypercoagulable states were obtained from 19 out of 21 patients (90%). Among patients with a hypercoagulable state, 3 out of 7 developed ICT compared with none out of 12 among patients without hypercoagulability (p=0.043). Two of these 3 patients experienced an embolic event. Conclusion: Cardiac failure with left ventricular dysfunction may predispose the patient to ICT and increase the risk of thromboembolism, especially when an underlying hypercoagulable state exists. The hypercoagulable state must be carefully evaluated on admission in these patients.

Transcranial electric stimulation entrains cortical neuronal populations in rats.

Ozen, Simal,Sirota, Anton,Belluscio, Mariano A,Anastassiou, Costas A,Stark, Eran,Koch, Christof,Buzsá,ki, Gyö,rgy The Society 2010 The Journal of neuroscience Vol.30 No.34

<P>Low intensity electric fields have been suggested to affect the ongoing neuronal activity in vitro and in human studies. However, the physiological mechanism of how weak electrical fields affect and interact with intact brain activity is not well understood. We performed in vivo extracellular and intracellular recordings from the neocortex and hippocampus of anesthetized rats and extracellular recordings in behaving rats. Electric fields were generated by sinusoid patterns at slow frequency (0.8, 1.25 or 1.7 Hz) via electrodes placed on the surface of the skull or the dura. Transcranial electric stimulation (TES) reliably entrained neurons in widespread cortical areas, including the hippocampus. The percentage of TES phase-locked neurons increased with stimulus intensity and depended on the behavioral state of the animal. TES-induced voltage gradient, as low as 1 mV/mm at the recording sites, was sufficient to phase-bias neuronal spiking. Intracellular recordings showed that both spiking and subthreshold activity were under the combined influence of TES forced fields and network activity. We suggest that TES in chronic preparations may be used for experimental and therapeutic control of brain activity.</P>

Lifestyle modifications in an adolescent dormitory: a clinical trial

Ibrahim Abu-Kishk,Michal Alumot-Yehoshua,Gadi Reisler,Shai Efrati,Eran Kozer,Keren Doenyas-Barak,Michal Feldon,Zahi Dagan,Rami Reifen,Matitiahu Berkovitch 대한소아청소년과학회 2014 Clinical and Experimental Pediatrics (CEP) Vol.57 No.12

Purpose: Childhood obesity is an increasing public health issue worldwide. We examined dietarypatterns among adolescents in a dormitory school, identified obese adolescents and tried to interveneto improve food habits and physical activity. Methods: We conducted an experimental prospective longitudinal study based on 36 obese (bodymass index [BMI]≥95th percentile) adolescents (aged 12–18 years) compared with controls (healthychildren: normal age-appropriate BMI (BMI≤85th percentile). Six months’ intervention includedlifestyle-modification counseling (once a week by a clinical dietician), and an exercise regimen twicea week, 60 minutes each time, instructed by a professional pediatric trainer). Both groups underwentbaseline measurements at the beginning of the study and 6 months later (arterial stiffness, bloodpressure, pulse, weight and height, hemoglobin, creatinine, liver enzymes, highly sensitive C-reactiveprotein and complete lipid profile). Results: Twenty-one participants completed the study. Low compliance from participants, schoolstaff and parents was observed (participation in planned meetings; 71%–83%). BMI significantlydecreased from 32.46±3.93 kg/m2 to 30.32±3.4 kg/m2 (P=0.002) in the study group. Arterialstiffness was not significantly different between the 2 groups and did not change significantly after 6months’ intervention (P=0.494). No significant changes in CRP and lipid profile were observed afterthe intervention. Conclusion: Making lifestyle modifications among adolescents in a dormitory school is a complex task. Active intervention indeed ameliorates BMI parameters. However, in order to maximize the beneficialeffects, a multidisciplinary well-trained team is needed, with emphasis on integrating parents and theschool environment.