BACKGROUND In recent years, there has been a shift toward minimally invasive procedures. In hair transplantation surgery, this trend has manifested with the emergence of follicular unit extraction (FUE). Recently, a robot has been introduced for FUE procedures. OBJECTIVE To determine the transection rate of a robotic FUE device. MATERIALS AND METHODS The authors discuss the procedure, techn...

In this paper, the authors present design of a suitable gear transmission with continuously changing ratio in range from 0.5 through 1.0 to 2.0 and back during one revolution intermeshing gears, according demands specified for practical application. The train was designed as pair identical elliptical gears procedure pitch curve (ellipse) is described. center rotation each coincident ellipse foc...

OBJECTIVES Despite increasing availability of global positioning system (GPS), no research has been conducted to analyze GPS data for exposure opportunities associated with time at indoor and outdoor microenvironments. We developed location-based and time-weighted spatial measures that incorporate indoor and outdoor time-location data collected by GPS. METHODS Time-location data were drawn fr...

A four-parameter kinematic model for the position of a fluid parcel in a time-varying ellipse is introduced. For any ellipse advected by an arbitrary linear two-dimensional flow, the rates of change of the ellipse parameters are uniquely determined by the four parameters of the velocity gradient matrix, and vice versa. This result, termed ellipse/flow equivalence, provides a stronger version of...

With the rapid development of China’s economy and acceleration urbanization, expansion urban space has led to a growing demand for land that resulted in destruction expropriation large amount ecological China. In face current situation resource constraints, environmental degradation, ecosystem destruction, it is necessary thoroughly study territorial China its evolution rules. Based on previous...

When faced with an ellipse fitting problem, practitioners frequently resort to algebraic ellipse fitting methods due to their simplicity and efficiency. Currently, practitioners must choose between algebraic methods that guarantee an ellipse fit but exhibit high bias, and geometric methods that are less biased but may no longer guarantee an ellipse solution. We address this limitation by propos...

Ellipses have long played a part in architecture. For instance, more than 4000 years ago in the Middle Minoan period a large oval house was built in Crete [1], while up to the present day in many parts of Africa, India, and Europe oval huts and houses were commonplace [2]. The Romans embraced the ellipse, and employed it on a vast scale in their ampitheatres [3]. In the Baroque period of the Re...