Search results for " Control"

Quality evaluation of software architecture with application to OpenH.323 protocol

2006

Master's Thesis in Information Technology 3rd October 2006 The requirements towards software systems usually go beyond the correct functionality, the presence of certain quality demands are also very essential for the systems' acceptance by the stakeholders. So quality control and management must be carried out through the whole development process to ensure the implementation of required quality characteristics. This thesis focuses on the quality control of the software architecture. Several approaches for evaluating the architecture are presented. Furthermore the OpenH.323 protocol architecture is evaluated in a case study. That software architecture is evaluated with two approaches: Arch…

Min-Type Control Strategy of a DC-DC Synchronous Boost Converter

2019

International audience; This paper presents the analysis and design of a min-type strategy to control a synchronous boost converter in continuous conduction mode. The strategy uses a nonlinear switching surface to establish the change of topology in the converter and is analyzed by means of a sliding-mode control approach. Subsequently, the min-type strategy is modified by a hybrid control formulation, which introduces a hysteresis width and a dwell-time to obtain a finite switching frequency in the start-up and steady-state respectively. The hybrid control formulation is implemented digitally by means of a microprocessor which processes the samples of inductor current and capacitor voltage…

Oral contraceptives in the prevention of endometrioma recurrence: does the different progestins used make a difference?

2013

""The primary aim of the study was to analyze the endometrioma recurrence rate in patients who underwent laparoscopic excision followed by postoperative long-term regimen of oral contraceptives (OCs).. . MATERIALS AND METHODS: 168 patients who underwent a conservative laparoscopic surgery for endometrioma, during the period between September 2009 and August 2010 in three university hospitals were studied. A long-term OCs therapy was offered to all women following surgery. Patients were randomly divided into three groups according to different progestins used (desogestrel, gestodene, dienogest). Women who refused a postoperative hormonal therapy served as control. Follow-up visits and transv…

Continuous subcutaneous Insulin infusion leads to immediate, table, and long-term changes in metabolic control

2008

Background:  Evaluations of continuous subcutaneous insulin infusion (CSII) usually focus on one pre- and one post-CSII measurement to assess metabolic therapy outcome. Aim:  Extending this research, the aim of the present study was to provide a more fine-grained analysis of achieved glycaemic control. Methods:  In 52 patients with type 1 diabetes (mean age of 37.85 years at CSII begin; s.d. ± 12.41), haemoglobin A1c (HbA1c) levels were assessed every 3 months over a period of 5 years (1 year before and 4 years after the introduction of CSII). Mixed models were utilized to describe changes in glycaemic control. Results:  The pre–post course showed that already in the first quarter, a statis…

Utilizzo di un modello diffusivo 2D di acque base per la simulazione in tempo reale di scenari di inondazione

2010

Readers’ Theater Projects for Special Education : A Randomized Controlled Study

2022

A randomized controlled trial was conducted to study the effectiveness of two readers’ theater (RT) programs in promoting reading skills and motivation of dysfluent readers in Grades 3–4. One program (RT Goal) included a goal of preparing a performance for an audience (n = 50), while another program (RT Practice) did not include such a goal (n = 49). A group of dysfluent readers receiving traditional oral reading intervention (Control group; n = 59) and a group of classroom peers (Mainstream group; n = 159) served as controls. The results indicate that both RT groups and the Control group developed at a higher rate in oral reading speed during the intervention period than the Mainstream gro…

Il diritto al controllo cautelare

2019

Il contributo analizza il diritto al controllo cautelare in prospettiva diacronica. Dall’emanazione della Carta costituzionale ad oggi si colgono punti di conquista di grande significato, condensati nella progressiva e reale affermazione della doppia riserva di legge e di giurisdizione ex art. 13 Cost., nella più chiara delimitazione – almeno teorica - dei rapporti tra la tutela cautelare e la presunzione di non colpevolezza, nel progressivo incedere verso un controllo di merito capace di compendiare la verifica di legittimità imposta dall’articolo 111 Cost. . Raccogliendo questi importanti traguardi, il Codice del 1988 ha racchiuso nel libro IV (la “carta di libertà” ) una complessiva razi…

Left Prefrontal Cortex Contributes to Motor Imagery: A Pilot Study

2013

Transcranial magnetic stimulation (TMS) over the motor cortex during motor imagery results in increased amplitudes of motor evoked potentials (MEPs) in muscles specific to the imagined movement. Functional MRI studies demonstrate that motor imagery involves a widespread neural network including prefrontal and parietal areas. The purpose of this pilot TMS study was to explore whether the left prefrontal cortex (PFC) is an active part of the motor imagery network. MEPs were recorded in 5 healthy subjects in tibialis anterior (TA) muscles during the imagined right ankle dorsiflexion while the neural processes in the left PFC were disturbed by a single TMS pulse 300ms prior to the leg area stim…

Reliability of transcranial magnetic stimulation and H-reflex measurement during balance perturbation tasks

2022

Following ankle movement, posterior balance perturbation evokes short- (SLR ∼30–50 ms), medium- (MLR ∼50–60 ms), and long-latency responses (LLR ∼70–90 ms) in soleus muscle before voluntary muscle contraction. Transcranial magnetic stimulation (TMS) and Hoffmann-reflex (H-reflex) measurements can provide insight into the contributions of corticospinal and spinal mechanisms to each response. Motor evoked potential (MEP) and H-reflex responses have shown good reliability in some dynamic muscle contraction tasks. However, it is still unclear how reliable these methods are in dynamic balance perturbation and corticospinal modulation during long amplitude balance perturbation tasks. 14 subjects …

Neural Correlates of Age-Related Changes in Precise Grip Force Regulation: A Combined EEG-fNIRS Study

2020

Motor control is associated with suppression of oscillatory activity in alpha (8–12 Hz) and beta (12–30 Hz) ranges and elevation of oxygenated hemoglobin levels in motor-cortical areas. Aging leads to changes in oscillatory and hemodynamic brain activity and impairments in motor control. However, the relationship between age-related changes in motor control and brain activity is not yet fully understood. Therefore, this study aimed to investigate age-related and task-complexity-related changes in grip force control and the underlying oscillatory and hemodynamic activity. Sixteen younger [age (mean ± SD) = 25.4 ± 1.9, 20–30 years] and 16 older (age = 56.7 ± 4.7, 50–70 years) healthy men were…