• The Journal of Korean Institute of Communications and Information Sciences
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• v.40 no.9
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• pp.1678-1685
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• 2015

We propose a linear precoding scheme combining the merits of beamforming and orthogonal space-time block coding based on the imperfect CSI without knowing the CSI reliability. We first investigate the impact of the CSI reliability on precoding performance by assuming various values of the CSI reliability. Then, we propose a method of predicting the CSI reliability based on the received SNR for the design of an efficient precoder. We show the efficiency of the proposed scheme by simulation.

• Proceedings of the Korean Society for Quality Management Conference
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• 2010.04a
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• pp.364-369
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• 2010

In this Paper, We proposed important KPI which is very critical problem that all enterprises must send out. We surveyed 50 company which are received Excellence Service Quality Certification by Government and we select KPI. We find critical KPI which is calculated important value by relation knowing KPI and item of SQ Model by using QFD Method. We hope proposed KPI which is being used in the enterprises.

• Journal of Korean Academy of Nursing
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• v.25 no.3
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• pp.419-430
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• 1995

There is a need to investigate folk remedies used by patients with breast cancer because there is little information about the subject, even though many Korean women with breast cancer have used folk remedies during and after their treatment. The purpose of this study was to investigate and describe the phenomena and the meaning of folk remedies in order to better understand patients with breast cancer and to suggest directions for comprehensive nursing care. The Questions for the study were as follows What kinds of folk remedies do patients with breast cancer use\ulcorner What are the routes of knowing about folk remedies in patients with breast cancer\ulcorner What are the patterns of the usage of the folk remedies\ulcorner Why do patients with breast cancer use folk remedies\ulcorner What are the meanings of folk remedies to patients with breast cancer\ulcorner To answer these questions, a qualitative research method was used. Thirty-nine patients were recruited from university teaching hospitals from March, 1993 to November 1994. Many of them underwent either modified radical mastectomy or received various adjuvant therapy including chemotherapy, radiation therapy, and hormonal therapy. Data were collected by in-depth interviews, observations, medical records, and analyzed step-by-step using qualitative analysis. The results were as follows : 1. Patients with breast cancer have used many different kinds of folk remedies. 2. Patients with breast cancer did not know the exact effects of the folk remedies. Also the effects could not be exactly proven by the patients. 3. Patients with breast cancer received information about many kinds of folk remedies through various communication systems, such as other patients, their families and relatives, friends, and many types of mass media. 4. To use the folk remedies was one kind of illness behavior that was used by these patients. 5. Folk remedies were used to deal with not only anxiety by the patients themselves but also as the expression of affection and concern by families and relatives. 6. The use of folk remedies was one of the adaptation behaviors in patients with breast cancer whose disease was in the terminal stage. Based on the above findings, one suggestion was made : To continue further studies on folk remedies used by other patients with cancer in order to further explain health and illness behavior of Korean people.

• Journal of Trauma and Injury
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• v.36 no.3
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• pp.172-179
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• 2023

Purpose: Out-of-hospital traumatic cardiac arrest (TCA) often has a poor prognosis despite rescue efforts. Although the incidence and mortality of out-of-hospital cardiac arrest have increased, bystander cardiopulmonary resuscitation (CPR) has decreased in some countries during the COVID-19 pandemic. In the prehospital setting, immediate treatment of cardiac arrest is required without knowing the patient's COVID-19 status. Because COVID-19 is usually transmitted through the respiratory tract, airway management can put medical personnel at risk for infection. This study explored whether on-scene treatments involving CPR for TCA patients changed during the COVID-19 pandemic in Korea. Methods: This retrospective study used data from emergency medical services (EMS) run sheets in Gangwon Province from January 2019 to December 2021. Patients whose initial problem was cardiac arrest and who received CPR were included. Data in 2019 were classified as pre-COVID-19 and all subsequent data (from 2020 and 2021) as post-COVID-19. Age, sex, possible cause of cardiac arrest, and treatments including airway maneuvers, oropharyngeal airway (OPA) or i-gel insertion, endotracheal intubation (ETI), bag-valve mask (BVM) ventilation, intravenous (IV) line establishment, neck collar application, and wound dressing with hemostasis were investigated. Results: During the study period, 2,007 patients received CPR, of whom 596 patients had TCA and 367 had disease-origin cardiac arrest (DCA). Among the patients with TCA, 192 (32.2%) were pre-COVID-19 and 404 (67.8%) were post-COVID-19. In the TCA group, prehospital treatments did not decrease. The average frequencies were 59.7% for airway maneuvers, 47.5% for OPA, 57.4% for BVM, and 51.3% for neck collar application. The rates of ETI, i-gel insertion, and IV-line establishment increased. The treatment rate for TCA was significantly higher than that for DCA. Conclusions: Prehospital treatments by EMS workers for patients with TCA did not decrease during the COVID-19 pandemic. Instead, the rates of ETI, i-gel insertion, and IV-line establishment increased.

• International journal of advanced smart convergence
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• v.8 no.4
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• pp.26-33
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• 2019

We conducted research to evaluate economically and engineering about the synthesis of Magnesium Oxide, MgO, nanoparticles using physicochemical methods. The method used was economic evaluation by calculating GPM, BEP, PBP, and CNPV. The other method used was engineering perspective. MgO nanoparticles were synthesized by reacting Mg(NO₃)₂ and NaOH with a mole ratio 1: 2. Mg(OH)₂ formed was heated and calcined to remove water content and to oxidation to form MgO. An economic evaluation by calculating GPM and CNPV for the production of MgO nanoparticles on an industrial scale shows that the payback period (PBP) occur in the third year and profits increase each year. Tax variations show that the higher of tax, the lower profits received. When there was an increase of selling prices, the profit was greater. The variable cost used is the price of raw material. When there was an increased in the variable cost price, the payback period was longer and the profits was reduced. The benefit of this research is knowing the industrial production of MgO nanoparticles is beneficial. The function of MgO nanoparticles is a material for the manufacture of ceramics and can be used as an antimicrobial in the water filtration process.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.13 no.3
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• pp.419-427
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• 2006

Purpose: This descriptive survey was done to assess how rural women with osteoarthritis perceive their symptoms, what are their treatment preferences, and how they manage their illness. Method: Individual interviews were carried out with 205 women with osteoarthritis living in rural areas. Structured questionnaires were used and the interviewers were 7 trained research assistants. Descriptive statistics were used for data analysis with SPSS win 11.5 program. Results: Of the respondents, 68.8% were overweight and 15.1% were obese, 86.9% reported pain in the knees, low back, and shoulders and the average pain score was 66.06. Those knowing the exact diagnosis accounted for 73.7% of the respondents but only 49.7% reported receiving medical treatments, and 40.2% who received treatment adhered to their prescription. Folk medicines were used by 14.1% of the respondents, but 65.2% among them reported that folk medicines were not effective. Exercise 2.03 times per week was reported by 17.1% of the respondents and 48.6% reported preferring to walk. Conclusion: Women with osteoarthritis in rural areas need a rehabilitative care program focused on exercise. The community health care system in the rural area should deliver optimal health care for this population. The results of this study can be used as a basis for planning intervention programs for women with osteoarthritis in the rural area.

• Korean Journal of Clinical Pharmacy
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• v.19 no.2
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• pp.159-166
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• 2009

The purpose of this study was to evaluate the attitude and knowledge of community pharmacists to spontaneous adverse drug reaction (ADR) reporting. A survey was conducted in 103 community pharmacists in Seoul and Kyung-Gi Province from September to October, 2009. Almost half (53, 51.5%) and three-fourths (79, 76.7%) of respondents knew they could participate in ADR reporting in the Regional Pharmacovigilance Center (RPC) or Korean Food and Drug Administration (KFDA). However, only three of them have reported an ADR to the RPC and none of them have reported to KFDA. A majority of the respondents (96, 93.2%) felt that ADR reporting was a professional obligation for pharmacists. The purpose of an ADR reporting was incorrectly identified by most pharmacists. ADR reporting was encouraged if the reaction was serious and a new product. The most frequently mentioned barriers to reporting were: uncertainty concerning the causal relationship (86.3%) and not knowing how to report an ADR (83.2%). Only 19 (18.4%) respondents had received education on how to report ADR. Education was the most recognized method of improving ADR reporting. This study showed the knowledge of ADR reporting among community pharmacists is inadequate. Education and training should be reinforced in order to improve ADR reporting by community pharmacists.

• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.707-712
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• 2006

Knowing the ground thermal conductivity is very importnat in designing ground heat exchangers. Knowledge of the ground soil and rock composition information dose not guarantee the prediction of accurate thermal information. In Situ testing of ground heat exchangers is becoming popular. However, in situ testing are performed at construction sites in real life. Adequate data collection and analysis are not easy mainly due to poor power quality. Power fluctuation also causes the fluctuation of received data. The power quality must be maintained during the entire in situ testing processes. To accurately analyse the test data, the understanding of the response of the power fluctuation is essential. Testing under the power quality varied by tester is very difficult. Analyzing power variation by numerical simulation is a realistic option. By varying power in a sinosuidal manner, its effects on predicting thermal conductivity from thermal response plots made from the test data are examined.

• International Journal of Knowledge Content Development & Technology
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• v.9 no.1
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• pp.7-18
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• 2019

The main objective of the study is to find out the level of information-seeking behaviour of auto mechanics working at Siwdu and its impact on the work they do. Two methods of data collection instruments were used; these included a questionnaire and interview schedule. The researchers personally administered fifty-three questionnaires of which forty-eight completed ones were received. Twelve (12) people were interviewed at their respective workshops. The respondents were registered members of Siwdu Auto Mechanic Association and the total number of sixty respondents used represented 20% of total number of members. Quantitative data obtained mainly from the questionnaire were analysed using Statistical Package for Social Sciences (SPSS) software version 20. Responses for the interview were analysed thematically. Some of the major findings are as follows: The majority of the respondents did not know how to get information from the library; some of the respondents preferred consulting their "Masters" for help; majority of the respondents had Android phones but did not know how to access relevant information; respondents were aware of the benefits of authentic information; and respondents recommended that Management of libraries should organise seminars and workshops for auto mechanics to enable them know how and where to access information. Information is needed by everybody to enhance efficiency therefore creating the awareness of the sources of information is a way of increasing productivity. Knowing the level of information-seeking behaviour of people in every manner of job is essential in the nation's human resource development.

• Journal of Audiology & Otology
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• v.23 no.2
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• pp.89-95
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• 2019

Background and Objectives: Knowing the ototoxic potential of the agents used in medical treatments is important for the protection of hearing. Although we have knowledge regarding some effects of dexmedetomidine, which is an anesthetic-sparing drug, its influence over the hearing system has never been studied and is obscure yet. The aim of this study is to determine the effects of intravenous dexmedetomidine application during sevoflurane anesthesia on otoacoustic emissions (OAEs). Subjects and Methods: This prospective randomized study was performed on 60 patients (34 male, 26 female, mean age: 30.6±9.2 years) who were scheduled for an elective surgery under general anesthesia and the patients were enrolled and randomly divided into 2 groups. They received dexmedetomidine (Group D) or Saline (Group S) infusion during a standardized Sevoflurane anesthesia. Transient and distortion product OAEs were measured preoperatively and postoperatively (24th hour). OAE results were compared within and between groups. Results: In group D postoperative OAEs were lower than preoperative OAEs and postoperative levels of group S, especially at low frequencies (p<0.05). Conclusions: Dexmedetomidine infusion affects the micromechanical function of cochlea especially in the low-frequency region. Dexmedetomidine should be carefully used during general anesthesia to avoid its probable harmful effects on cochlear micromechanics.