Ki-Joon Kim

The development of nonenzymatic glucose sensors with favorable electrocatalytic activity and chemical stability is crucial in various fields. Therefore, in this study, we systematically investigate a series of ZIF-ZnxCo1–x materials (0 ≤ x ≤ 1) and demonstrate that the appropriate combination of Zn2+ and Co2+ within a metal–organic framework (MOF) delivers a promising platform for developing a glucose sensor with good glucose sensitivity and superior chemical stability. Herein, ZIF-Zn0.5Co0.5 wa

A small antenna with coupling feed and parasitic elements for multiband application is proposed. The proposed antenna is small, low-profile, and suitable for multiband mobile applications. The coupling feed structure provides wideband characteristic to a planar inverted-F antenna (PIFA). There are two resonance modes at 0.8 GHz, and their current distributions are observed. Four resonance modes from high-order resonance modes and parasitic elements are designed to be at 1.7 GHz. The proposed ant

The effect of tap spacing on the performance of a RAKE receiver is analyzed analytically in a frequency-selective fading channel. A continuous time multipath fading channel model is used for the analysis, and the expression of the correlation between the desired signals, interference signals, and noise signals at the output of each branch of the RAKE receiver is derived for various chip waveforms. Since the noise components of each branch signal are correlated to each other, an optimum combining

BACKGROUND: Nonsteroidal anti-inflammatory drugs (NSAIDs), through synergistic action with opioids, can reduce postoperative nausea and vomiting via intravenous patient-controlled analgesia (PCA). We compared the efficacy of three PCA regimens. METHODS: Patients (n = 135) undergoing thyroidectomy were randomly allocated to three PCA regimens. All groups received 12 mg ondansetron (a serotonin 5-HT(3) receptor antagonist). In addition, Group I received the opioid fentanyl, 15 microg/kg. Group II

The authors comment that the probability density function (PDF) of the signal-to-noise ratio (SNR) for third-order selection combining (SC3) given by Eng, Kong and Milstein (see ibid., vol.44, p.1117-29, 1996) is incorrect. A correction is given by presenting a more efficient method of deriving the generalized PDF of the SNR essential in the analysis of Nth-order selection combining.

BACKGROUND: Postoperative pruritus, nausea, and vomiting are common side effects of intrathecal or epidural opioids. Intravenous ondansetron has been used for postoperative emesis. However, there are no reports regarding epidural ondansetron. Two studies were conducted to evaluate the prophylactic effects of epidural ondansetron for opioid-induced pruritus, nausea, and vomiting. METHODS: Neurotoxic signs were checked after epidural injection of ondansetron in rats. A clinical study was conducted

Recently, a number of diving injuries have been reported due to the increase in the number of self-contained underwater breathing apparatus (SCUBA) divers in Korea. Most diving injuries are associated with the mechanics of the gases and pressure changes during descent and ascent. The main pathologies are barotrauma, decompression illness, the toxic effects of gases, and the aggravation of cardiopulmonary diseases. There are various modalities for the treatment and prevention of diving injuries,

Submental endotracheal intubation is a simple and secure alternative to either nasoendotracheal intubation or a tracheostomy in the airway management of maxillofacial trauma. However, a submental endotracheal intubation is quite difficult to manage if adverse events such as a tube obstruction, accidental extubation, or a leaking cuff with the endotracheal tube in the submental route occur, which could endanger the patient. This paper describes the use of a LMA-FastrachTMETT in the submental endo