Search results for: S. Salazar

Items from 1 to 20 out of 85 results

article

Relation of outbursts of anger and the acute risk of placental abruption: A case‐crossover study

Harpreet S. Chahal, Bizu Gelaye, Elizabeth Mostofsky, Manuel S. Salazar, more

Paediatric and Perinatal Epidemiology > 33 > 6 > 405 - 411

Background Roughly, a fourth of all placental abruption cases have an acute aetiologic underpinning, but the causes of acute abruption are poorly understood. Studies indicate that symptoms of stress, depression, and anxiety during pregnancy may be associated with a higher risk of abruption. Objective We examined the rate of abruption in the 2 hours immediately following outbursts of anger. Methods...

article

Pancreatic β-cell dysfunction in normoglycemic patients and risk factors

Luis H. Vilchis-Flores, Georgina A. Barajas-Medina, Ana Karen Villa-Martínez, Sara S. Salazar López, more

Acta Diabetologica > 2019 > 56 > 12 > 1305-1314

Aims To evaluate pancreatic β-cell function (βf) in patients with normoglycemia (NG) and normal glucose tolerance (NGT) and related risk factors. Methods An observational and comparative study in 527 patients with NG and NGT that were divided by quartiles of βf according to the disposition index derived from OGTT. Anthropometrical, clinical, nutritional, and biochemical variables were measured and...

article

Creation and assessment of a clinical predictive model for candidaemia in patients with candiduria

Katie Wang, Kevin Hsueh, Ryan Kronen, Charlotte Lin, more

Mycoses > 62 > 7 > 554 - 561

Candidaemia is the most common clinical presentation of invasive candidiasis and is a major cause of morbidity and mortality. Candiduria is a predictor for candidaemia; however, patient characteristics that are associated with concurrent candidaemia in the setting of candiduria are unclear. Identifying these characteristics could aid in the early detection of systemic disease. We performed a retrospective...

article

Comparison of methohexital and propofol as induction agents for evaluation of laryngeal function in healthy dogs

Mikala B. Brown, Danielle R. Dugat, Shane D. Lyon, Laura A. Nafe, more

Veterinary Surgery > 48 > 1 > 70 - 78

Objective To determine the influence of propofol or methohexital, with and without doxapram, on the examination of laryngeal function in dogs. Study design Experimental study. Animals Forty healthy dogs randomly assigned to 4 groups: propofol with saline (n = 10), propofol with doxapram (n = 10), methohexital with saline (n = 10), or methohexital with doxapram (n = 10). Methods Propofol and...

article

Noninvasive Brain Stimulation Improves Hemispatial Neglect After Stroke: A Systematic Review and Meta-Analysis

Ana Paula S. Salazar, Patrícia G. Vaz, Ritchele R. Marchese, Cinara Stein, more

Archives of Physical Medicine and Rehabilitation > 2018 > 99 > 2 > 355-366.e1

To evaluate the effectiveness of noninvasive brain stimulation (NIBS)—repetitive transcranial magnetic stimulation (rTMS) and transcranial direct current stimulation (tDCS)—on hemispatial neglect and performance in activities of daily living (ADL) after stroke.MEDLINE (PubMed), EMBASE, Cochrane CENTRAL, Scopus, SciELO, and Physiotherapy Evidence Database were searched from database inception to December 2016...

article

Analysis of geothermal energy as an alternative source for electricity in Colombia

Samuel S. Salazar, Yecid Muñoz, Adalberto Ospino

Geothermal Energy > 2017 > 5 > 1 > 1-12

Geothermal energy is the energy that is stored inside the earth and which may be used by man either directly (with no transformation) or to generate electricity by means of a geothermal power plant. This article estimates the participation of geothermal energy in Colombia’s electricity market by the year 2025, based on a review of current installed capacity in the country; potential sources of geothermal...

article

N‐cadherin Regulation of Bone Growth and Homeostasis Is Osteolineage Stage–Specific

Francesca Fontana, Cynthia L Hickman‐Brecks, Valerie S Salazar, Leila Revollo, more

Journal of Bone and Mineral Research > 32 > 6 > 1332 - 1342

N‐cadherin inhibits osteogenic cell differentiation and canonical Wnt/β‐catenin signaling in vitro. However, in vivo both conditional Cdh2 ablation and overexpression in osteoblasts lead to low bone mass. We tested the hypothesis that N‐cadherin has different effects on osteolineage cells depending upon their differentiation stage. Embryonic conditional osteolineage Cdh2 deletion in mice results...

article

Is there a relevance of suction drainage in non-septic wrist surgery?

G. Prunières, J.J. Hidalgo Diaz, P. Vernet, S. Salazar Botero, more

Orthopaedics & Traumatology: Surgery & Research > 2017 > 103 > 3 > 453-455

No rational argument leads to conclude to the benefit or the innocuousness of drainage in non-septic wrist surgery.The goal of this study was to validate the hypothesis that for those indications drainage is unnecessary.We reviewed 1001 consecutive cases, concerning 885 patients, 58 years old in average.Out of 1001 procedures, 9 patients were operated on both sides, 145 were operated twice of which...

article

Technical feasibility of robot-assisted minimally-invasive neurolysis of the lateral cutaneous nerve of thigh: About a case

A. Bruyere, J.J. Hidalgo Diaz, P. Vernet, S. Salazar Botero, more

Annales de Chirurgie Plastique Esth�tique > 2016 > 61 > 6 > 872-876

To limit the risk of iatrogenic neuroma and recurrence after surgical treatment of meralgia paresthetica, some authors have recently developed a technique of endoscopic neurolysis of the lateral cutaneous nerve of thigh (LCNT) below the level of the inguinal ligament. We report the case of a robot-assisted endoscopic technique underneath the inguinal ligament. A 62-year-old patient suffering of idiopathic...

chapter

Mathematical model and simulation of finger movement with electromyographic signals

A.E. Zamora Suarez, A. Osorio, R. Lopez, S. Salazar, more

2016 20th International Conference on System Theory, Control and Computing (ICSTCC) > 771 - 775

2016 20th International Conference on System Theory, Control and Computing (ICSTCC)

A mathematical model that describes the movement of the fingers of the hand is reported in this paper. Electromyographic signals (EMG) are recorded from the forearm and are analyzed to detect which of them are responsible of the movement of each finger. The way the EMG signals are analyzed to determine which of them produce the movement of the fingers is also described. These will be used in an ongoing...

chapter

A robust linear control methodology based on fictitious failure rejection

M. Bonilla, L. A. Blas, S. Salazar, J. C. Martinez, more

2016 European Control Conference (ECC) > 2596 - 2601

2016 European Control Conference (ECC)

We propose here a quite simple and effective robust linear control scheme based on failure detection techniques. Our proposed linear control approach is intended to reject linearly structured uncertainties, the uncertainty is then modeled via a deterministic signal, that is identified as an actuator fault. The proposed robust control methodology is illustrated via the altitude control of a planar...

chapter

The MAV3DSim hardware in the loop simulation platform for research and validation of UAV controllers

I. Lugo-Cardenas, S. Salazar, R. Lozano

2016 International Conference on Unmanned Aircraft Systems (ICUAS) > 1335 - 1341

2016 International Conference on Unmanned Aircraft Systems (ICUAS)

The design and testing of unmanned aerial vehicles is a difficult task due to the high risk of damage to property during testing, to prevent accidents from happening it is indeed necessary to perform extensive simulation of controllers to ensure good stability and performance. We have been working to solve this problem by developing a realistic simulator by using a complete mathematical model of the...

chapter

Altitude control of a quad-rotor using adaptive sliding mode

R. Lopez, S. Salazar, A. Martinez-Vasquez, I. Gonzalez-Hernandez, more

2016 International Conference on Unmanned Aircraft Systems (ICUAS) > 1111 - 1116

2016 International Conference on Unmanned Aircraft Systems (ICUAS)

This paper addresses simulation results about the altitude control of a quad-rotor unmanned flying vehicle (UAV) in the presence of uncertainty like wind gust. A sliding mode control was proposed, the gain of control can be decreased and, as a result, the chattering amplitude is reduced. The objective is to introduce an adaptation in the control law in order to decrease the gain to the minimal value...

article

Feasibility study of indocyanine green for sentinel lymph node mapping in early-stage cervical cancer

A.L. Beavis, S. Salazar-Marioni, A.K. Sinno, R.L. Stone, more

Gynecologic Oncology > 2016 > 141 > S1 > 31

chapter

A Non-linear Classifier for Symbolic Interval Data Based on a Region Oriented Approach

Renata M. C. R. Souza, Diogo R. S. Salazar

Lecture Notes in Computer Science > Advances in Neuro-Information Processing > Neural Network Based Semantic Web, Data Mining and Knowledge Discovery > 11-18

This paper presents a non-linear classifier based on a region oriented approach for interval data. Each example of the learning set is described by a interval feature vector. Concerning the learning step, each class is described by a region (or a set of regions) in $\Re^{p}$ defined by hypercube of the objects belonging to this class. In the allocation step, the assignment of a new object to a...

chapter

Vision-based Position Control of a Two-rotor VTOL miniUAV

E. Rondon, S. Salazar, J. Escareno, R. Lozano

Selected papers from the 2nd International Symposium on UAVs, Reno, Nevada, U.S.A. June 8–10, 2009 > 49-64

In this paper we address the stabilization of the attitude and position of a birotor miniUAV to perform autonomous flight. For this purpose, we have implemented a Kalman-based sensor fusion between inertial sensors (gyros-accelerometers) and the optical flow (OF) provided by the vehicle. This fusion algorithm extracts the translational-OF (TOF) component and discriminates the rotational OF (ROF)....

chapter

Modeling and Real-Time Stabilization of an Aircraft Having Eight Rotors

S. Salazar, H. Romero, R. Lozano, P. Castillo

Unmanned Aircraft Systems > 455-470

We introduce an original configuration of a multi rotor helicopter composed of eight rotors. Four rotors, also called main rotors, are used to stabilize the attitude of the helicopter, while the four extra rotors (lateral rotors) are used to perform the lateral movements of the unmanned aerial vehicle (UAV). The main characteristic of this configuration is that the attitude and translation dynamics...

chapter

Robust control with disturbance observer for UAV translational tracking

A. Rodriguez-Mata, R. Lopez, A. Martinez-Vasquez, S. Salazar, more

2015 Workshop on Research, Education and Development of Unmanned Aerial Systems (RED-UAS) > 419 - 423

2015 Workshop on Research, Education and Development of Unmanned Aerial Systems (RED-UAS)

An integral robust observer with rejection control disturbance is proposed in this paper. The design of the observer is performed employing the canonical obervable model of the original non-linear system, obtained by a change of coordinates. A practical stability is proved using the Lyapunov approach with using a high gain to maintain the solution in a convergence ball. Several simulations cases are...

article

Comparison of pathological data between prostate biopsy and radical prostatectomy specimen in patients with low to very low risk prostate cancer

G. Lendínez-Cano, J. Alonso-Flores, V. Beltrán-Aguilar, A. Cayuela, more

Actas Urologicas Espanolas (English Edition) > 2015 > 39 > 8 > 482-487

To analyze the correlation between pathological data found in radical prostatectomy and previously performed biopsy in patients at low risk prostate cancer.A descriptive, cross-sectional study was conducted to assess the characteristics of radical prostatectomies performed in our center from January 2012 to November 2014. The inclusion criteria were patients with low-risk disease (cT1c–T2a, PSA≤10ng/ml...

chapter

Pneumatic assistant of one degree of freedom for lifting

I. Rosales, R. Lopez, H. Aguilar, Y. Rosales, more

2015 19th International Conference on System Theory, Control and Computing (ICSTCC) > 249 - 254

2015 19th International Conference on System Theory, Control and Computing (ICSTCC)

Exoskeletons are wearable robots i.e. robots coupled to the body of a user and commanded by him/her. The fields of application involve among others, the military as well as the medical industries. This paper presents the design of part of an exoskeleton aimed to enhance the performance of people that have had spinal injury or that suffer from some problem or pain in the lumbar area. An experimental...

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INFONA - science communication portal

Search results for: S. Salazar

Relation of outbursts of anger and the acute risk of placental abruption: A case‐crossover study

Pancreatic β-cell dysfunction in normoglycemic patients and risk factors

Creation and assessment of a clinical predictive model for candidaemia in patients with candiduria

Comparison of methohexital and propofol as induction agents for evaluation of laryngeal function in healthy dogs

Noninvasive Brain Stimulation Improves Hemispatial Neglect After Stroke: A Systematic Review and Meta-Analysis

Analysis of geothermal energy as an alternative source for electricity in Colombia

N‐cadherin Regulation of Bone Growth and Homeostasis Is Osteolineage Stage–Specific

Is there a relevance of suction drainage in non-septic wrist surgery?

Technical feasibility of robot-assisted minimally-invasive neurolysis of the lateral cutaneous nerve of thigh: About a case

Mathematical model and simulation of finger movement with electromyographic signals

A robust linear control methodology based on fictitious failure rejection

The MAV3DSim hardware in the loop simulation platform for research and validation of UAV controllers

Altitude control of a quad-rotor using adaptive sliding mode

Feasibility study of indocyanine green for sentinel lymph node mapping in early-stage cervical cancer

A Non-linear Classifier for Symbolic Interval Data Based on a Region Oriented Approach

Vision-based Position Control of a Two-rotor VTOL miniUAV

Modeling and Real-Time Stabilization of an Aircraft Having Eight Rotors

Robust control with disturbance observer for UAV translational tracking

Comparison of pathological data between prostate biopsy and radical prostatectomy specimen in patients with low to very low risk prostate cancer

Pneumatic assistant of one degree of freedom for lifting

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