Chung-Yi Chang

Learn More
Obtaining good performance from WWW proxy caches is critically dependent on the document replacement policy used by the proxy. This paper validates the work of other authors by reproducing their studies of proxy cache document replacement algorithms. From this basis a cross-trace study is mounted. This demonstrates that the performance of most document(More)
A construction of 64-QAM Golay complementary sequences was proposed by Lee and Golomb, where three QPSK Golay-Davis-Jedwab complementary sequences (GDJ sequences, or standard Golay sequences) related by a pair of offsets were combined to form each 64-QAM Golay sequence. Feasible offset pairs were given as first order generalized Boolean functions in(More)
Many queries sent to search engines refer to specific locations in the world. Location-based queries try to find local services and facilities around the user's environment or in a particular area. This paper reviews the specifications of geospatial queries and discusses the similarities and differences between location-based queries and other queries. We(More)
Recent studies have shown that computerized clinical case management and decision support systems can be used to assist surgeons in the diagnosis of disease, optimize surgical operation, aid in drug therapy and decrease the cost of medical treatment. Therefore, medical informatics has become an extensive field of research and many of these approaches have(More)
BACKGROUND Perioperative monitoring of mitral valve (MV) anatomy, function, and pathology is essential for surgical management of different MV disease. AIMS To overcome the several potential pitfalls of two-dimensional transesophageal echocardiography (2D TEE) and offline 3D TEE. METHODS Live 3D TEE was used to assess 73 patients (44 men and 29 women)(More)
The Na(+)-H(+) exchanger (NHE) and the Na(+)-HCO3(-) co-transporter (NBC) have been confirmed as two major active acid extruders in many mammalian cells. Whether the NHE and NBC functional co-exist in human internal mammary artery smooth muscle cells (HIMASMCs) remains unclear. The aims of the present study were to investigate the acid-extruding mechanisms(More)
Post-caesarean pulmonary embolism (PE) is associated with significant peri-operative morbidity and mortality. This report describes a case of sudden cardiac arrest 2 days post-caesarean due to massive PE diagnosed via bedside transesophageal echocardiography (TEE). Recognition of the PE at the bifurcation of the right and left pulmonary arteries was(More)
Homeostasis of the intracellular pH (pHi) in mammalian cells plays a pivotal role in maintaining cell function. Thus far, the housekeeping Na(+)-H(+) exchanger (NHE) and the Na(+)-HCO3(-) co-transporter (NBC) have been confirmed in many mammalian cells as major acid extruders. However, the role of acid-extruding regulators in human renal artery smooth(More)
Protein arginine methylation is emerging as a pivotal posttranslational modification involved in regulating various cellular processes; however, its role in erythropoiesis is still elusive. Erythropoiesis generates circulating red blood cells which are vital for body activity. Deficiency in erythroid differentiation causes anemia which compromises the(More)
  • 1