• 디지털콘텐츠학회 논문지
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• 제13권2호
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• pp.151-157
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• 2012

방사선 구역 내부의 공간선량은 의학의 발전과 더불어 방호시설이 잘 되어 있어도 작업종사자의 피폭을 증가시킬 우려가 있다. 핵의학과 내의 분배실은 항상 공간선량이 존재하므로 작업종사자의 피폭선량을 예측하기 위하여 분배실 내부의 공간선량을 측정, 분석 하였다. 핵의학과 $^{18}F$ 분배실의 공간선량률 측정결과 최대 $6.78{\pm}0.083{\mu}Sv/h$, $^{99m}Tc$, $^{131}I$ 분배실의 공간선량률이 최대 $9.248{\pm}0.013{\mu}Sv/h$로 나타났다. 또한, $^{18}F$ 분배실의 경우 1m 거리에서 간호사가 IV시 연간 외부피폭선량은 $42.5{\mu}Sv$로 나타났다. 분배실의 분배창을 기준으로 오른쪽 사방향에서 공간선량률이 높게 나타났다. 따라서 방사성의약품을 분배실에서 분배할 경우 방사선 작업종사자의 머무르는 시간을 짧게 해야 하며, 분배창의 오른쪽 사방향의 경우 피폭을 줄이기 위한 분배창의 설계가 필요하며, IV시 작업종사자의 개인피폭선량을 줄이기 위한 최선의 노력이 필요하다고 사료된다.

• 유통과학연구
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• 제19권1호
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• pp.5-15
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• 2021

Purpose: This study explores the types of relational benefits that generate loyalty to room-sharing services among Chinese customers based on the relationship marketing literature. The study also examines the moderating effect of alternative attractiveness on this relationship. Research design, data and methodology: Based on research hypotheses, questionnaires with items measuring the proposed constructs in three dimensions, including relational benefits, alternative attractiveness, and customer loyalty, were designed to test the hypotheses. Data were collected via an online questionnaire of 220 room-sharing service customers in China. Results: Results verify the effects of relational benefits on customers' loyalty to room-sharing services and the mediating effect of alternative attractiveness. More specifically, confidence, social, and safety benefits positively affect customer loyalty to room-sharing services, and alternative attractiveness moderates only the effect of social benefits. Conclusions: The results suggest that room-sharing service providers should concentrate on providing confidence, social, and safety benefits to maintain long-term relationships with customers. This study also provides practical implication for building relationships between channel members in service distribution channels. The study concludes that without customer relationships marketing for managing collaborative and social communication channels, the entire distribution channel might lose out eventually.

• 대한안전경영과학회지
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• 제19권2호
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• pp.95-100
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• 2017

In this study, the bacterial contamination level of equipments and devices in the nuclear medicine department of a university hospital was investigated. CNS was detected from the sample collected from the door opening button of the nuclear medicine department. Bacillus sp. was detected from the table and CNS with Bacillus sp. were detected from the control button at the PET-CT room no.1. Also, CNS was detected from the table and the control button at the PET-CT room no.2. In the distribution room no.1, CNS and Bacillus sp. were detected while CNS being detected from the distribution room no.2 and CNS with Bacillus sp. being detected from the distribution room no.3. In the injection room, Enterrococcus faecium and Pontoea sp. were detected. On the table of the ecsomatics room, Pontoea sp. was detected. Bacillus sp. was detected from the inside of the syringe Pb shield and CNS was detected from the outside. Enterrococcus faecium was detected from the Gamma camera table and Bacillus sp. was detected from the door grip. On the chair at the patient waiting room, Pseudomonas aeruginosa abd Bacillus sp. were detected. Therefore, it was understood that infection should be prevented by securely sterilizing examination devices after each examination, maintaining cleanliness by regular sterilization of waiting chairs and such objects with a number of direct contacts with patients, and infection education for the features of nuclear department.

• 대한한방내과학회지
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• 제39권3호
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• pp.350-362
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• 2018

Objectives: By analyzing the characteristics and the distribution of diseases of patients who visited the emergency room of a Korean medical hospital, we sought to determine the methods of activating the Korean emergency medical system and to use this analysis as a basis for future research. Methods: We conducted a retrospective review of 959 patients who visited the emergency department of the Dong-Eui University Korean Medical Hospital from January 2016 to December 2016. The review was conducted using electronic medical records created during the emergency department visit. Results & Conclusions: In distribution of sex, the rate of males was 47.9%, and that of females was 52.1%. In distribution of age, the greatest number of patients were in their 50s (27.5%), followed by those in their 60s (19.9%) and 40s (14.8%). In distribution of residence, most patients were from Busan (84.9%). In distribution of week, more patients visited the emergency room on Sundays and holidays (44.3%). September was the busiest month (12.5%). Visits usually occurred during daytime and nighttime, and there were few visits at dawn. In the analysis of the time interval between onset of symptoms and the emergency room visit, most patients visited within 24 hours (46.5%). In the distribution of diseases, facial palsy was the most common (34.6%). In the systematic distribution of diseases, circulatory diseases were the most common (56.7%), followed by diseases of the musculoskeletal system (28.6%). The rate of first emergency room visit was 52.9%, and the rate of revisit was 47.1%. The rate of hospitalization after emergency room treatment was 27.5%, and the rate of discharge was 72.4%. The rate of revisit was 63.4%. In the distribution of treatment before arrival at the emergency room, direct was the most common (51.0%), and the outpatient department of western medicine was next. In the distribution of treatment in the emergency room, acupuncture was the highest (91.4%), followed by herb-med (43.0%).

• 한국의료질향상학회지
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• 제20권1호
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• pp.60-73
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• 2014

Objectives: This study aims at decreasing spatial dose rate through work improvement whilst spatial dose rate is the cause of increasing personal exposure dose which occurs in the process of handling radioisotope. Methods: From February 2013 until July 2013, divided into "before" and "after" the improvement, spatial dose rate in laboratory of nuclear medicine was measured in gamma image room, PET/CT-1 image room, and PET/CT-2 image room as its locations. The measurement time was 08:00, 12:00 and 17:00, and SPSS 21.0 USA was opted for its statistical analysis. Result: The spatial dose rate at distribution worktable, injection table, the entrance to the distribution room, and radioisotope storage box, which had showed high spatial dose rate, decreased by more than 43.7% a monthly average. The distribution worktable, that had showed the highest spatial dose rate in PET/CT-1 image room, dropped the rate to 42.3% as of July. The injection table and distribution worktable in the PET/CT-2 image room also showed the decline of spatial dose rate to 89% and 64.4%, respectively. Conclusion: By improving distribution process and introducing proper radiation shielding material, we were able to drop the spatial dose rate substantially at distribution worktable, injection table, and nuclide storage box. However, taking into account of steadily increasing amount of radioisotope used, strengthening radiation related regulations, and safe utilization of radioisotope, the process of system improvement needs to be maintained through continuous monitoring.

• 한국수산과학회지
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• 제55권5호
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• pp.670-680
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• 2022

Owing to the lack of a cold-chain distribution system, most seafood is generally distributed under room temperature conditions. However the degradation of freshness during the distribution process can lead to disputes between sellers and consumers. The most widely used method for low-temperature distribution for seafood includes packaging it with styrofoam boxes and cold packs. In this study, vacuum-packed frozen fillets of four fish species of [white meat (Paralichthys olivaceus and Sebastes schlegelii) and red meat (Scomber japonicus and Scomberomorus niphonius)] were placed in styrofoam boxes with cold packs. Thereafter, changes in chemical (including pH, volatile basic nitrogen, and trimethylamine), physical (odor intensity, hardness, and chewiness), and microbial (viable cell count) characteristics of the fillets were measured during storage at 25℃. To identify the suitable method of determining freshness during the room-temperature distribution, several factors were considered, which included significant difference verification, correlation coefficients, and economic efficiency (experimental cost and time). Volatile basic nitrogen, pH, odor intensity, and viable cell count are the most rapid and accurate freshness indicators for determining freshness of frozen fish fillets during.

• 한국정밀공학회지
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• 제26권12호
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• pp.85-93
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• 2009

This research is intended to grasp the characteristics of heat flow inside auxiliary power device engine room to obtain the design basic data through numerical analysis and experiment. For experiment cost reduction, numerical analysis was done to obtain quantitative data by observing the change in temperature distribution of major parts according to changes in normal condition, incompressible condition, engine surface heat emission rate and absorption temperature with the use of commercial STAR-CD. The experiment was done by grasping the temperature distribution of major interested parts inside engine room in loaded and unloaded conditions during engine operation. The temperature distribution data here will serve as useful design data during APU engine room designing.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 추계학술대회논문집B
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• pp.199-204
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• 2000

This paper reports a thermal environmental analysis of a room in accommodated with multi-heat sources according to ventilation condition. Two case modification have been investigated to obtain the lower temperature distribution in the room. The temperature distribution of the original room were found about $25{\sim}35^{\circ}C$. As a result, the use of, three ventilating fans and two electric fans are useful for room ventilation respectively, and using two electric fan is more recommendable in side of economical efficiency.

• 설비공학논문집
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• 제13권6호
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• pp.524-531
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• 2001

The temperature and humidity distribution in a dry room are studied numerically by using standard$\kappa-\varepsilon$ turbulence model. In order to evaluate effective heat and moisture ventilation characteristics inside the room, the heat removal capacity and moisture exhaust efficiency are introduced. An effective ventilation control is analyzed by evaluating quantitatively temperature and humidity distributions. It was found that the mean absolute humidity inside the room was almost constant with approximately 0.1905g/kg air regardless of the models and the heat generation rates. This was believed that the moisture generation by workers was relatively small. 40% improvement of the critical decay time was achieved, through the modifications of design variables.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2009년도 춘계학술대회 논문집
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• pp.821-822
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• 2009