Han River Renaissance Project in Semiotics of Space

[Abstract] This paper aims to examine the direction and strategy of Han River Renaissance Project which the city authority of Seoul is trying to promote with a positive drive and to propose the direction to establish competitive identity of Han River, with theories and methodology in Space Semiotics. Recently urban places have won more and more academic concerns, especially focused on how to create cultural — aesthetic — symbolic value for the cities, naturally led to theories and methodology in Space Semiotics, which can be dealt to overcome conventional planning of formation and concept for the urban spaces so that makes new ideas and concepts for space identities. In detail this paper, centered on theories of Space Semiotics A. J. Greimas suggested, intends to analyze the identity of Han River the core space of Seoul and to propose a new idea for that: in historical-cultural context, bringing vestige the traditional values to the present that citizens, the main users and the real owners, have accumulated both on space and time line

Foot Drop after Anterior Cervical Discectomy and Fusion: A Case Report

A foot drop is caused by weakness or paralysis of the muscles of the anterior compartment of the leg. These muscles dorsiflex and evert the ankle and extend the toes. Typically, a foot drop results from lower motor neuron disease or peroneal nerve injury, with cases caused by upper neuron pathology being very rare. Here, we present the case of a 67-year-old man who developed a foot drop after C3-C4/C4-C5 anterior cervical discectomy and fusion performed as treatment for herniated discs at these levels, and spinal stenosis. Pre-operatively, ankle dorsiflexor strength was graded as 4+/5, bilaterally. After surgery, a left foot drop was identified in the recovery room, with dorsiflexor strength of 0/5. Magnetic resonance imaging showed a thickening of the ligamentum flavum (yellow ligament) at C4-C5, compared to its thickness on pre-operative imaging. A C3-C5 laminectomy was performed with recovery of dorsiflexion strength to a grade of 3/5. High pressure exerted on the anterior cervical cord, due to spinal canal stenosis, was considered to be the cause of the transient left drop foot after surgery. Central causes of drop foot in patients with cervical spine stenosis should be investigated, in particular after anterior cervical discectomy and fusion

Facile and time-resolved chemical growth of nanoporous CaxCoO2 thin films for flexible and thermoelectric applications

CaxCoO2 thin films can be promising for widespread flexible thermoelectric applications in a wide temperature range from room-temperature self-powered wearable applications (by harvesting power from body heat) to energy harvesting from hot surfaces (e.g., hot pipes) if a cost-effective and facile growth technique is developed. Here, we demonstrate a time resolved, facile and ligand-free soft chemical method for the growth of nanoporous Ca0.35CoO2 thin films on sapphire and mica substrates from a water-based precursor ink, composed of in-situ prepared Ca2+-DMF and Co2+-DMF complexes. Mica serves as flexible substrate as well as sacrificial layer for film transfer. The grown films are oriented and can sustain bending stress until a bending radius of 15 mm. Despite the presence of nanopores, the power factor of Ca0.35CoO2 film is found to be as high as 0.50 x 10-4 Wm-1K-2 near room temperature. The present technique, being simple and fast to be potentially suitable for cost-effective industrial upscaling.Comment: 16 pages, 5 figure

EventSR: From Asynchronous Events to Image Reconstruction, Restoration, and Super-Resolution via End-to-End Adversarial Learning

Event cameras sense intensity changes and have many advantages over conventional cameras. To take advantage of event cameras, some methods have been proposed to reconstruct intensity images from event streams. However, the outputs are still in low resolution (LR), noisy, and unrealistic. The low-quality outputs stem broader applications of event cameras, where high spatial resolution (HR) is needed as well as high temporal resolution, dynamic range, and no motion blur. We consider the problem of reconstructing and super-resolving intensity images from LR events, when no ground truth (GT) HR images and down-sampling kernels are available. To tackle the challenges, we propose a novel end-to-end pipeline that reconstructs LR images from event streams, enhances the image qualities and upsamples the enhanced images, called EventSR. For the absence of real GT images, our method is primarily unsupervised, deploying adversarial learning. To train EventSR, we create an open dataset including both real-world and simulated scenes. The use of both datasets boosts up the network performance, and the network architectures and various loss functions in each phase help improve the image qualities. The whole pipeline is trained in three phases. While each phase is mainly for one of the three tasks, the networks in earlier phases are fine-tuned by respective loss functions in an end-to-end manner. Experimental results show that EventSR reconstructs high-quality SR images from events for both simulated and real-world data.Comment: Accepted by CVPR 202