11,289 research outputs found
Anaesthesia Management of Caesarean Section in Two Patients with Eisenmenger's Syndrome
Recently two parturients with Eisenmenger's syndrome underwent caesarean section at our hospital. They were managed by a multidisciplinary team during their perioperative period. The caesarean sections were uneventfully performed, one under general anaesthesia and one with epidural anaesthesia, with delivery of two newborns with satisfactory Apgar scores. One patient died in the post-partum period, and the other did well. We discuss the anaesthetic considerations in managing these high-risk patients
Distributed Change Detection via Average Consensus over Networks
Distributed change-point detection has been a fundamental problem when
performing real-time monitoring using sensor-networks. We propose a distributed
detection algorithm, where each sensor only exchanges CUSUM statistic with
their neighbors based on the average consensus scheme, and an alarm is raised
when local consensus statistic exceeds a pre-specified global threshold. We
provide theoretical performance bounds showing that the performance of the
fully distributed scheme can match the centralized algorithms under some mild
conditions. Numerical experiments demonstrate the good performance of the
algorithm especially in detecting asynchronous changes.Comment: 15 pages, 8 figure
Bending and wrinkling as competing relaxation pathways for strained free-hanging films
An equilibrium phase diagram for the shape of compressively strained
free-hanging films is developed by total strain energy minimization. For small
strain gradients {\Delta}{\epsilon}, the film wrinkles, while for sufficiently
large {\Delta}{\epsilon}, a phase transition from wrinkling to bending occurs.
We consider competing relaxation mechanisms for free-hanging films, which have
rolled up into tube structures, and we provide an upper limit for the maximum
achievable number of tube rotations.Comment: 4 pages, 4 figure
The effect of walking speed on the foot inter-segment kinematics, ground reaction forces and lower limb joint moments
Background: Normative foot kinematic and kinetic data with
different walking speeds will benefit rehabilitation programs
and improving gait performance. The purpose of this study was
to analyze foot kinematics and kinetics differences between
slow walking (SW), normal walking (NW) and fast walking (FW)
of healthy subjects. Methods: A total of 10 healthy male
subjects participated in this study; they were asked to carry
out walks at a self-selected speed. After measuring and
averaging the results of NW, the subjects were asked to
perform a 25% slower and 25% faster walk, respectively.
Temporal-spatial parameters, kinematics of the tibia (TB),
hindfoot (HF), forefoot (FF) and hallux (HX), and ground
reaction forces (GRFs) were recorded while the subjects walked
at averaged speeds of 1.01 m/s (SW), 1.34 m/s (NW), and 1.68
m/s (FW). Results: Hindfoot relative to tibia (HF/TB) and
forefoot relative to hindfoot (FF/HF) dorsiflexion (DF)
increased in FW, while hallux relative to forefoot (HX/FF) DF
decreased. Increased peak eversion (EV) and peak external
rotation (ER) in HF/TB were observed in FW with decreased peak
supination (SP) in FF/HF. GRFs were increased significantly
with walking speed. The peak values of the knee and ankle
moments in the sagittal and frontal planes significantly
increased during FW compared with SW and NW. Discussion:
Limited HF/TB and FF/HF motion of SW was likely compensated
for increased HX/FF DF. Although small angle variation in
HF/TB EV and FF/HF SP during FW may have profound effects for
foot kinetics. Higher HF/TB ER contributed to the FF push-
offthe ground while the center of mass (COM) progresses
forward in FW, therefore accompanied by higher FF/HF abduction
in FW. Increased peak vertical GRF in FW may affected by
decreased stance duration time, the biomechanical mechanism
maybe the change in vertical COM height and increase leg
stiffness. Walking speed changes accompanied with modulated
sagittal plane ankle moments to alter the braking GRF during
loading response. The findings of foot kinematics, GRFs, and
lower limb joint moments among healthy males may set a
reference to distinguish abnormal and pathological gait
patterns. © 2018 Sun et al
Acupuncture for overweight or obese people (Protocol)
Overweight and obesity are defined as abnormal or excessive fat accumulation that presents a risk to health (WHO 2010). The fundamental cause of obesity and overweight is an energy imbalance between calories consumed and calories expended. Global increases in overweight and obesity are attributable to a number of factors including: a global shift in diet towards increased intake of energy-dense foods that are high in fat and sugars and a trend towards decreased physical activity due to the increasingly sedentary nature of many forms of work, changing modes of transportation, and increasing urbanization. The WHO recommends using the body mass index (BMI), which is defined as the weight in kilograms divided by the square of the height in meters (kg/m2), to assess the level of overweight and obesity. At present, the WHO defines overweight as a BMI equal to or more than 25, and obesity as a BMI equal to or more than 30. The range of 18.50 to 24.99 is considered as normal. For Asia-Pacific region, the WHO recommend different ranges (WHO 2000). BMI cut-points provide a benchmark for individual assessment, but must be regarded as a rough guide for adults (WHO 2006). The BMI criteria used for children and teens are different from those used for adults
q-Deformation of W(2,2) Lie algebra associated with quantum groups
An explicit realization of the W(2,2) Lie algebra is presented using the
famous bosonic and fermionic oscillators in physics, which is then used to
construct the q-deformation of this Lie algebra. Furthermore, the quantum group
structures on the q-deformation of this Lie algebra are completely determined.Comment: 12 page
Coarse-grained reconfigurable array architectures
Coarse-Grained Reconfigurable Array (CGRA) architectures accelerate the same inner loops that benefit from the high ILP support in VLIW architectures. By executing non-loop code on other cores, however, CGRAs can focus on such loops to execute them more efficiently. This chapter discusses the basic principles of CGRAs, and the wide range of design options available to a CGRA designer, covering a large number of existing CGRA designs. The impact of different options on flexibility, performance, and power-efficiency is discussed, as well as the need for compiler support. The ADRES CGRA design template is studied in more detail as a use case to illustrate the need for design space exploration, for compiler support and for the manual fine-tuning of source code
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