We give new characterizations of the largest minimum weights among LCD codes of large dimensions. Using the characterizations, we completely determine the largest minimum weights among binary LCD codes of length n and dimension$n-6$, ternary LCD codes of length n and dimension$n-5$and quaternary Hermitian LCD codes of length n and dimension$n-4$for arbitrary n. We also determine the largest minimum weights among binary LCD codes of length n and dimension$n-7$, ternary LCD codes of length n and dimension$n-6$and quaternary Hermitian LCD codes of length n and dimension$n-5$with only some exceptions n.

This paper develops a novel approach to design, actuate, and manufacture a space debris collector based on the conical Kresling origami pattern. The deployable nature of origami structures and the radial closability of the conical Kresling pattern are leveraged to form an enclosure volume for collecting space debris at different sizes. We first introduce the geometric, volume, and energy models of the conical Kresling pattern. Based on these models, the debris collector design problem is formulated as a parameter optimization problem to minimize the actuation energy for the folding process while satisfying the minimum volume constraint and geometric/functional constraints. To automatically capture debris in space, an actuation system is designed, which is compatible with space environments. Moreover, the multi-material three-dimensional printing technology is applied to build the designed debris collector, which makes it feasible for manufacturing the product in orbit. The proposed design, actuation, and manufacturing approaches are verified with experimental tests using a designed prototype.

This paper presents an inflatable robotic arm controlled by a joystick to be used for healthcare applications. The arm is constructed almost entirely of plastic elements: inflatable links, air bag actuators, and acrylonitrile butadiene styrene (ABS) joints. Therefore, it is softer and lighter than typical robotic arms that are made of metal and heavy elements. Because the softness and lightness of the inflatable robotic arm is intrinsically safer, it is suitable for healthcare applications. In this paper, a new control method is proposed which allows the inflatable system to be controlled with a joystick. To verify the usefulness of the proposed method, we used an inflatable robotic arm with four degrees of freedom (4 DOF) to obtain experimental results for the control performance of the inflatable robotic arm. Moreover, we conducted preliminary tests which simulated patients controlling the robotic arm with a joystick in order to assist with eating their meals.