There are some rare but probable devastating complications following any rhinoplasty. Charlin’s syndrome is a typical one. It is completely related to the external nasal nerve. In this report, we are presenting a 21-year-old female with signs and symptoms of Charlin’s syndrome, persisting for 4 years after a routine septorhinoplasty operation. Surgery was uneventful and the patient ...

This paper presents a tuned behavior-based guidance algorithm for formation flight of quadrotors. The behavior-based approach provides the basis for the simultaneous realization of different behaviors such as leader following and obstacle avoidance for a group of agents; in our case they are quadcopters. In this paper optimization techniques are utilized to tune the parameters of a behavior-bas...

In recent years, a large number of research efforts have been directed towards implementing cognitive robotic systems. One of the approaches for accomplishing cognitive system design is by following an optimization procedure. In particular, following this approach, the complete structure of the cognitive system is described by a set of parameters, while an optimization process is utilized to ex...

We consider the following general optimization problem min x2≤1 −x ⊤ y + γx 1. (15) Before we proceed, we need the following lemma. Lemma 6. The solution to the optimization problem min x 1 2 (x − y) 2 + γ|x| is given by P γ (y) = 0, if |y| ≤ γ; sign(y)(|y| − γ), otherwise. where P γ (·) is the soft-thresholding operator defined in (7) (Donoho, 1995).

One of several major contributions of Edmonds to combinatorial optimization is algorithms and polyhedral theorems for matroid intersection, and more generally polymatroid intersection. From an optimization point of view, the matroid intersection problem is the following: Let M1 = (S, I1) and M2 = (S, I2) be two matroids on the same ground set S. Then I1 ∩ I2 is the collection of all sets that a...

abstract appendicitis after age 40 is unusual, and appendicitis two days after laparoscopic hysterectomy is very rare and has not been reported to date. we describe a 44-year-old woman who had abdominal pain two days after laparoscopic hysterectomy. the pathology report indicated early appendicitis and the pain disappeared after appendectomy. in our opinion, the cause of appendicitis may have b...

among 2379 patients with upper urinary tract stones who underwent eswl (extracorporeal shock wave lithotripsy) at sina hospitál using the siemens lithostar, 638 developed stone street (steinstrasse). of these, 516 (81%) passed all of the stone fragments spontaneously and no treatment was required, 90 cases (14%) had more eswl sessions to complete the treatment, and 30 (4.7%) required further in...