• 한국의료질향상학회지
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• 제7권2호
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• pp.138-155
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• 2000

3차 의료기관 응급의료센터의 총 진료소요시간을 단축하여 업무의 효율성을 높이고 환자적체를 해소하는 방안을 마련하기 위하여 l997년 4월 1개월 동안 대구광역시 소재 영남대학교병원 응급의료센터 내원환자 1,742명을 대상으로 환자의 특성, 응급진료와 관련된 내용 및 응급진료시간, 그리고 상호관련성을 분석하였다. 평균 초진소요시간은 83.3분이었고, 남자 83.1분, 여자 84.9분여였으며, 평균 총 진료소요시간은 전체 698분이었고, 남자 718.0분 여자 670.5분이었다. 총 진료소요시간은 고령일수록 증가하였으며 의료보호환자에서 초진 및 퇴실시간이 가장 많이 소요되었고 산재환자는 가장 적게 소요되었다. 전원시 소견서를 구비하지 않은 경우에 초진소요시간어이 많았으며, 총 진료소요시간은 외래어에서 전과된 경우, 타병원으로부터 전원된 경우, 전원시 소견서를 구비한 경우와 OCS를 부분적으로 사용한 경우에 많았다. 약물중독환자, 심폐소생술을 시행한 환자, 내과환자 수혈을 받은 환자 및 복합진료 여부가 3개과 이상이었던 환자에서 총 진료소요시간이 많았으며 당직인턴수가 4명이었던 경우가 총 진료소요 시간이 5명이었던 경우에 비해 더 많이 걸렸다. 입원한 경우, 입원명령후 공실이 없었던 경우에서 역시 총 진료소요시간이 증가하였으며 총 진료소요시간과 유의한 상관관계를 갖는 연속변수로는 환자의 연령, 방사선검사수 및 일반검사수였다. 초진소요시간에 대한 중회귀분석결과, 응급의학과 환자, 응급환자, 내원시 심폐소생술 시행환자유무, 내원시 기관내삽관 여부 등이 유의한 독립변수였다. 총 진료소요시간에 대한 중회귀분석결과, 공실유무, 일반검사수, 최종진료과, 타병원 전원유무, 방사선검사수, 퇴원약 유무, 입원실 종류, 입원유무, 담당전공의 연차, 내원원인, 내원시 심폐소생술 시행환자 유무, 수술여부, 병원직원 지인유무 및 특수검사수가 유의한 독립변수였다. 이상의 결과로 보아 응급의료센터내의 환자적체현상을 해결하기 위한 방안으로는 응급환자와 비응급환자를 분류하는 제도적 장치가 필요하며, 필수적인 경우에 한해 일반검사 및 방사선검사를 실시하도록 하며, 병동내의 과별 지정병상을 유동적으로 운영하여 응급의료센터 환자가 우선적으로 입원될 수 있도록 각과의 협조가 필요할 것으로 사료된다.

• 한국세라믹학회지
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• 제49권6호
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• pp.535-541
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• 2012

ALC was fabricated using cement, lime, quartzite and a foaming agent via a hydrothermal reaction. ALC has various hydrothermal reaction products and many pores. The properties and colors of ALC surfaces were changed by various factors during ALC fabrication process. This study tested various staying times to analyze these phenomena. It was found that the staying time of green body influenced the properties of hydrothermal products and color of ALC surface. The longer staying time of green body, the lower tobermorite content and cumulative loss weight. An increase in holding time changed color and decreased whiteness of ALC surface. The relationship between whiteness and cumulative loss weight was very high (Coefficient, r = 0.95). It was surmised that tobermorite content was an important factor for enhancement of whiteness However, ettringite and quartzite did not contribute to whiteness.

• 지적과 국토정보
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• 제50권1호
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• pp.231-245
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• 2020

본 연구는 교통카드 자료를 활용하여 서울시 고령인구의 주요 체류 공간을 도출하고 체류의 시공간적 특성을 분석에 목적을 두었다. 이를 위해 2015년 10월 12일부터 2015년 10월 18일까지 7일간의 서울시 교통카드 자료를 이용하였다. 분석 결과 도심지, 강남 등 14개 지역이 주 체류 공간으로 추출되었으며, 각 체류지별 방문 사용자 특성과 체류 시간대를 기준으로 살펴본 결과 5개 그룹으로 특성이 나뉘는 것을 확인할 수 있었다. 체류지 대부분은 해당 지역 인근에 거주하는 고령 인구가 방문하는 것으로 나타났으나, 많은 고령 인구가 방문하는 그룹의 경우 상대적으로 방문 고령자의 거주지가 넓게 나타나 체류지간 위계가 존재함을 확인할 수 있었다. 체류 집중 시간대는 주로 오전 10시에서 오후 5시 사이에 집중되는 것으로 나타났다. 하지만 제기동과 영등포의 경우 오후 12부터 체류가 집중되며, 잠실, 선릉, 양재의 경우 주중 오전 9시부터 체류가 집중되어 체류지별 인구 집중 시간이 상이하게 나타남을 확인할 수 있었다. 본 연구결과는 서울시 내의 고령 인구의 주요 체류 공간과 각 체류 공간별 체류 특성을 고려한 대중교통정책수립에 필요한 시사점을 제공한다.

• 환경위생공학
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• 제11권3호
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• pp.47-52
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• 1996

Personal exposure levels of $NO_{2}$ for office workers and housewives Living in A-San and neighboring prefectures were measured in two seasons with $NO_{2}$ filter badge. $NO_{2}$ concentrations in indoor and outdoor air in their offices and houses were also measured in the same periods. Personal exposure levels in winter ranged from 13 to 132 ppb and its distribution pattern was remarkably different from the other seasons (15.2-17.9 ppb). This fact suggests that use of heating apparatus affects largely $NO_{2}$ indoor air pollution in winter seasons. Actually, $NO_{2}$ exposure levels of subjects used Kerosene heater (43.6ppb) and gas heater (33.4ppb) were higher than those of subjects unused heating apparatus (18.0ppb). Personal exposure levels of $NO_{2}$ for man and woman Living in the same houses were correlated well each other. The time spent indoors for office workers and housewives were both longer than 22 hour a day. Home staying time was about 60% of total indoor staying time for office workers and 90% or more for housewives. Personal exposure levels were significantly related to indoor exposure levels at home all seasons. Furthermore, personal exposure levels could be estimated from $NO_{2}$ concentrations and staying times in various Living environment.

• 반도체디스플레이기술학회지
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• 제23권2호
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• pp.38-44
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• 2024

This research proposed DBSCAN-D, which is a clustering technique for locating POI based on existing density-based clustering research, such as GPS data, generated by moving objects. This method is designed based on 'staying time' and 'directionality' extracted from the relationship between GPS data. The staying time can be extracted through the difference in the reception time between data using the time at which the GPS data is received. Directionality can be expressed by moving the area of data generated later in the direction of the position of the previously generated data by concentrating on the point where the GPS data is sequentially generated. Through these two properties, it is possible to perform clustering suitable for the data set generated by the moving object.

• 대한의생명과학회지
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• 제10권3호
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• pp.237-243
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• 2004

In recent, many cardiac centers have preferred off-pump coronary artery bypass grafting (CABG) to on-pump CABG to prevent the adverse effects of cardiopulmonary bypass. The present study was performed to prove beneficial effects of off-pump CABG. Sixty adult patients scheduled for elective CABG were randomly assigned to On-pump group (n=30) or Off-pump group (n=30). Arterial blood samples were drawn before and after the operation (Pre-OP and Post-OP, respectively) for measuring CBC, prothrombin time, activated thromboplastine time, blood gas analysis, creatine kinase-MB (CK-MB) level, and lactate dehydrogenase (LDH) level. Perioperative parameters including heparin and protamine usages, complications, blood components usages, blood loss, ventilation and ICU-staying time, and hospitalization were also evaluated. Platelet count at Post-OP was high in Off-pump group whereas CK-MB and LDH levels were low compared with On-pump group. Off-pump group had significantly lower heparin and protamine usages, lower total leukocyte count, higher hematocrit and hemoglobin levels, less blood loss, lower usages of blood components, shorter ventilation and ICU-staying time, and lower incidence of pleural effusion than On-pump group. Other variables did not significantly differ between two groups. These results showed that Off-pump CABG was a satisfactory technique with less inflammatory reaction, less cardiac damage, less postoperative complications, and less cost.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권6호
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• pp.2160-2179
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• 2015

In many Radio Frequency Identification (RFID) applications, the reader recognizes the tags within its scope repeatedly. For these applications, some algorithms such as the adaptive query splitting algorithm (AQS) and the novel semi-blocking AQS (SBA) were proposed. In these algorithms, a staying tag retransmits its ID to the reader to be identified, even though the ID of the tag is stored in the reader's memory. When the length of tag ID is long, the reader consumes a long time to identify the staying tags. To overcome this deficiency, we propose a slot allocated blocking anti-collision algorithm (SABA). In SABA, the reader assigns a unique slot to each tag in its range by using a slot allocation mechanism. Based on the allocated slot, each staying tag only replies a short data to the reader in the identification process. As a result, the amount of data transmitted by the staying tags is reduced greatly and the identification rate of the reader is improved effectively. The identification rate and the data amount transmitted by tags of SABA are analyzed theoretically and verified by various simulations. The simulation and analysis results show that the performance of SABA is superior to the existing algorithms significantly.

• 수산해양기술연구
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• 제28권4호
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• pp.347-359
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• 1992

The movements of three striped jack (Caranx delicatissimus, 24cm of body length) were tracked by ultrasonic telemetry in the Nunoura Bay in August 1990. A school of the striped jack has been released near by the fish farming rafts by Goto branch of the Fisheries Agency and Japan Sea-Farming Association. To investigate the staying area and the swimming pattern of the fish, small size pinger($\Phi$8.5$\times$L35mm, 140dB re 1$\mu$Pa at 1m, 69kHz) was tagged on the dorsal fin without any anesthesia. The movements of three tagged fish are monitored at the same time with four omni-directional hydrophones. The locations of the fish are calculated by the hyperbolic method and tracked by a technique so called time division scheme which uses both the pulse interval and the phase. Three pingers used have the pulse interval of 1.7, 1.8 and 1.9sec, respectively, and the common pulse duration of 15ms. In results it was capable to estimate behavior right after the release, swimming speeds and approximate moving area of the fish. The movements were tracked for a week continuously, and it was found out that the staying area of the fish was around or under the farming rafts. Sometimes they swam together but most of the time they move separately. The average swimming speed of those fish was about two times of the body length.

• Animal cells and systems
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• 제10권3호
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• pp.137-143
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• 2006

A series of no-choice olfactory response tests using water pre-conditioned with females, with intact and surgically removed ventral glands, at various reproductive states were conducted to determine whether male Hynobius leechii discriminates among females in different reproductive states based on chemical cues. Similarly, ventral gland extracts were tested, and ventral glands were examined histologically. Males’ responses to putative odors of females in four (ovulating, ovulated, ovipositing, and oviposited) reproductive states were independently measured by: i) the latency time to initiate male behavioral response, ii) the arrival time at a fixed point of putative odor source, and iii) the staying time close to the odor point source. Male salamanders showed significant olfactory responses to recently ovulated and ovipositing female odors by quickly arriving at odor sources and staying longer at the origin of the source, but the olfactory responses to the earlier staged ovulating females and the later stage of already oviposited females were not different from controls. Olfactory responses of test males to water preconditioned by intact females or females with ventral glands excised were not different. In addition, ventral gland extracts did not induce significant olfactory responses of test males although the lumens of alveoli in ventral glands of oviposited females were smaller than those of ovulated females. These results indicate that male H. leechii recognizes ovulated and ovipositing females based on chemical cues released but not from the ventral glands.

• 한국환경보건학회지
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• 제43권2호
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• pp.157-166
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• 2017

Objectives: Exposure to hazardous air pollutants could be affected by sociodemographic factors such as age, gender and more. Information on time spent in microenvironments has a critical role in exposure assessment. The purpose of this study was to analyze the exposure pathways which influence personal exposure through time-activity patterns and sociodemographic factors. Methods: A total of 379 subjects were collected from the second term of the Korean National Environmental Health Survey. A questionnaire survey in relation to sociodemographic factors and a time-activity diary were carried out for personal exposure to toluene. Focusing on personal exposure to toluene, factors affecting personal exposure were analyzed using multiple regression analysis. Results: Participants spent their time in an indoor house for $16.8{\pm}4.0hr$, workplace or school $2.3{\pm}3.5hr$, and other indoor $2.1{\pm}2.2hr$. Sociodemographic factors were significantly different among each personal exposure and microenvironment. Time of staying at an office turned out to be a main factor from point of exposure in exposure pathway using multiple regression analysis. As a result, this means that exposure may be different according to the time of staying in each microenvironment. Conclusions: Personal exposure to air pollutants might be decided by time-activity pattern indicating when, where, and which activities people pursue, as well as individual sociodemographic factors.