Is the late near-infrared bump in short-hard GRB 130603B due to the Li-Paczynski kilonova?

Short-hard gamma-ray bursts (GRBs) are widely believed to be produced by the merger of two binary compact objects, specifically by two neutron stars or by a neutron star orbiting a black hole. According to the Li-Paczynski kilonova model, the merger would launch sub-relativistic ejecta and a near-infrared/optical transient would then occur, lasting up to days, which is powered by the radioactive decay of heavy elements synthesized in the ejecta. The detection of a late bump using the {\em Hubble Space Telescope} ({\em HST}) in the near-infrared afterglow light curve of the short-hard GRB 130603B is indeed consistent with such a model. However, as shown in this Letter, the limited {\em HST} near-infrared lightcurve behavior can also be interpreted as the synchrotron radiation of the external shock driven by a wide mildly relativistic outflow. In such a scenario, the radio emission is expected to peak with a flux of $\sim 100 \mu$Jy, which is detectable for current radio arrays. Hence, the radio afterglow data can provide complementary evidence on the nature of the bump in GRB 130603B. It is worth noting that good spectroscopy during the bump phase in short-hard bursts can test validity of either model above, analogous to spectroscopy of broad-lined Type Ic supernova in long-soft GRBs.Comment: 4 pages, 2 figures, published in ApJ Lette

Semantic Arithmetic Coding using Synonymous Mappings

Recent semantic communication methods explore effective ways to expand the communication paradigm and improve the system performance of the communication systems. Nonetheless, the common problem of these methods is that the essence of semantics is not explicitly pointed out and directly utilized. A new epistemology suggests that synonymy, which is revealed as the fundamental feature of semantics, guides the establishment of the semantic information theory from a novel viewpoint. Building on this theoretical basis, this paper proposes a semantic arithmetic coding (SAC) method for semantic lossless compression using intuitive semantic synonymy. By constructing reasonable synonymous mappings and performing arithmetic coding procedures over synonymous sets, SAC can achieve higher compression efficiency for meaning-contained source sequences at the semantic level and thereby approximate the semantic entropy limits. Experimental results on edge texture map compression show an evident improvement in coding efficiency using SAC without semantic losses, compared to traditional arithmetic coding, which demonstrates its effectiveness.Comment: 6 pages, 4 figures. This paper is submitted to the 2024 IEEE International Symposium on Information Theory (ISIT 2024

Semantic Huffman Coding using Synonymous Mapping

Semantic communication stands out as a highly promising avenue for future developments in communications. Theoretically, source compression coding based on semantics can achieve lower rates than Shannon entropy. This paper introduces a semantic Huffman coding built upon semantic information theory. By incorporating synonymous mapping and synonymous sets, semantic Huffman coding can achieve shorter average code lengths. Furthermore, we demonstrate that semantic Huffman coding theoretically have the capability to approximate semantic entropy. Experimental results indicate that, under the condition of semantic lossless, semantic Huffman coding exhibits clear advantages in compression efficiency over classical Huffman coding.Comment: 6 pages, 3 figures, this paper is submitted to the 2024 IEEE International Symposium on Information Theory (ISIT 2024

实施行管、医疗、护理联合总值班的实践与成效

Objective: To explore the effect of combined duty mode on discovery and control of medical nursing hidden trouble. Method: In order to make sure that patients are in the first place, we should take the mode of combined duty of administrative management, medical treatment and nursing. Results：The incidence of nursing errors and defects reduced, and patients’ satisfaction improved. the differences were statistically significant (P＜0.01 or P＜0.05).Results: Combined duty can the reduce medical nursing defects, improve the efficiency of quality health care services and the management efficiency.目的  探讨实施联合总值班模式对发现及控制医疗护理隐患的有效性。方法  以优化值班模式为前提，以病人为中心，采取行管、医疗、护理联合总值班的方法。结果  通过实施联合值班，护理差错及缺陷发生率降低，患者的满意度提高，实施前后比较差异均具有统计学意义（P＜0.01或P＜0.05）。结论  实施联合总值班，可以最大程度地预防医疗护理缺陷的发生，提高医疗护理服务及管理效率