The goal of this paper is to introduce a new neural network architecture called Sigmoid Diagonal Recurrent Neural Network (SDRNN) to be used in the adaptive control of nonlinear dynamical systems. This is done by adding a sigmoid weight victor in the hidden layer neurons to adapt of the shape of the sigmoid function making their outputs not restricted to the sigmoid function output. Also, we in...

We consider the use of sigmoid functions for multistage detection in asynchronous code-division multiple-access (CDMA) systems. The sigmoid decision function for each stage of multistage detection is derived under the assumption that the residual noise which remains after the multiple-access interference (MAI) cancellation at a stage is Gaussian. It is suggested that the sigmoid function should...

Case Report We report a rare case of urothelial carcinoma invading the sigmoid mesocolon in a 60-year-old female admitted to our department. The patient presented with a 25-cm intra-abdominal mass and 6-cm ulcerated lesion at the top of the umbilicus. Laparotomy was performed which demonstrated a huge polycystic and solid tumour of the sigmoid mesentery infi ltrating the sigmoid colon and appen...

Sigmoid surface controller has been proved to be effective in motion control of autonomous underwater vehicles, but it is hard to adjust its control parameters. Improved particle swarm optimization of sigmoid surface controller was proposed in this paper, which solves the problems that particle swarm optimization may be trapped in local optimum and fails to converge to global optimum. Moreover,...

INTRODUCTION The low incidence of colon injury due to blunt abdominal trauma and the lack of a definitive diagnostic method for the same can lead to delays in diagnosis and treatment, subsequently resulting in high morbidity and mortality. CASE PRESENTATION A 66-year-old woman with sigmoid colon injury was admitted to our emergency department after sustaining blunt abdominal trauma. Her physi...

OBJECTIVES To report an unusual presentation of a giant sigmoid diverticulum in the colon. CLINICAL PRESENTATION AND INTERVENTION The patient presented with an abdominal mass, altered bowel habits, and increasing weight. The provisional diagnosis was made by barium enema and CT scan. The patient underwent laparotomy, revealing a perforated giant sigmoid diverticulum that was excised using Har...

Tuberculosis of the sigmoid colon is a rare disorder. An 80-year-old man visited Bongseng Memorial Hospital for medical examination. A colonoscopy was performed, and a lesion in the sigmoid colon that was suspected to be colon cancer was found. A biopsy was performed, and tuberculous enteritis with chronic granulomatous inflammation was diagnosed. Intestinal tuberculosis is most frequent in the...

Sigmoid volvulus refers to torsion of a segment of the alimentary tract, which often leads to bowel obstruction and ischemic changes. Sigmoid volvulus is an acute surgical emergency because delay in diagnosis and management can cause adverse maternal and fetal complications. Sigmoid volvulus typically presents with acute-on-chronic abdominal distension that may develop slowly over 3-4 days. An ...

The electric activity of the sigmoid colon (electrosigmoidogram=ESG) and rectum (electrorectogram=ERG) and their relationship was studied in nine patients. Slow waves or pacesetter potentials (PPs) of the sigmoid colon and rectum were recorded. The PP frequency and amplitude of the electrorectograms were higher (p less than 0.05) than electrosigmoidograms. Balloon distention of the sigmoid colo...

Introduction The sigmoid colon is continuous with the descending colon proximally and the rectum distally. It is an intraperitoneal organ suspended in a long mesocolon and has a median length of about 25-38 cm. It is highly mobile and quite variable in position and length [1, 2]. A longer than normal sigmoid colon is referred to as a redundant sigmoid colon or dolichosigmoid. Most of these vari...