• Journal of Biosystems Engineering
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• 제39권3호
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• pp.194-204
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• 2014

Purpose: The aim of this study was to develop long-term storage technology for Chinese cabbage in order to extend the period of availability of freshly harvested products. The scope of the paper deals with the use of a cooler with a remote monitoring and control interface in conjunction with use of packaging film. Methods: A cooler with a real time monitoring system was designed as a low-temperature storage facility to control temperature and relative humidity (RH). The effects of storage in high-density polyethylene (HDPE) plastic boxes, 3% chitosan dipping solution, polypropylene film (PEF) with perforations, and mesh packaging bags on physiological responses were investigated. The optimal storage temperature and humidity for 120 days were below $0.5^{\circ}C$ and 90%, respectively. Physiological and biochemical features of cabbage quality were also analyzed: weight loss, texture, and sugar salinity, chlorophyll, reducing sugar, and vitamin C contents. Results: The cooler with a remote monitoring and control interface could be operated by an HMI program. A $0.5^{\circ}C$ temperature and 90% humidity could be remotely controlled within the cooler for 120 days. Postharvest freshness of Chinese cabbages could be maintained up to 120 days depending on the packaging method and operation of the remote monitoring system. In particular, wrapping the cabbages in PEF with perforations resulted in a less than a 5% deterioration in quality. This study provides evidence for efficient performance of plastic films in minimizing post-harvest deterioration and maintaining overall quality of cabbages stored under precise low-temperature conditions with remote monitoring and a control interface. Conclusions: Packaging with a modified plastic film and storage in a precisely controlled cooler with a remote monitoring and control interface could slow down the physiological factors that cause adverse quality changes and thereby increase the shelf life of Chinese cabbage.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2006년도 학술대회 1부
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• pp.960-965
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• 2006

Privacy and security are latent problems in pervasive healthcare system. For the sake of protecting health monitoring information, it is necessary to classify and categorize the various contexts in terms of obfuscation. In this paper, we propose the physiological context categorization and specification methodology by exploiting data fusion network for automatic context alignment. In addition, we introduce the methodologies for making various level of physiological context on the context aware application model, which is wear-UCAM. This physiological context has several layers of context according to the level of abstraction such as user-friendly level or parametric level. This mechanism facilitates a user to restrict access to his/her monitoring results based on the level of details in context.

• 융합신호처리학회논문지
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• 제20권1호
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• pp.9-15
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• 2019

As the human population increases in the world, the ratio of health doctors is rapidly decreasing. Therefore, it is an urgent need to create new technologies to monitor the physical and mental health of people during their daily life. In particular, negative mental states like depression and anxiety are big problems in modern societies. Usually this happens due to stressful situations during everyday activities including work. This paper presents a machine learning approach to reliably estimating the level of human mental stress using wearable physiological sensors. And also, this paper presents an Android- and Arduino-based stress monitoring and relief system.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2007년도 추계종합학술대회
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• pp.67-71
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• 2007

최근 고령 인구의 증가에 따른 헬스 케어 수요가 증가하고 있고 환자뿐만 아니라 일반인들에게서도 헬스 케어 모니터링에 대한 요구가 급증하고 있다. 또한 의료 서비스를 제공받으려는 대상자의 불편을 최소화하고, 지속적인 모니터링을 통한 헬스 케어가 가능할 수 있는 의료 기술과 의료 정보서비스에 대한 수요도 늘어나고 있는 추세이다 본 논문에서는 헬스 케어를 위한 무선 생체 신호 모니터링 시스템을 구현하였다. 구현된 시스템은 생세 신호 측정부와 무선 통신부로 구성된 센서 노드(sensor node)와 원격 시스템의 모니터링 프로그램으로 구성된다. 센서 노드에서는 심전도, 혈압, 맥파, 동맥혈산소포화도, 심박수를 측정할 수 있고 블루투스 기술을 이용하여 무선 전송을 하여 모니터링 시스템에서 실시간 무선 모니터링이 가능하도록 구현하였다.

• 한국정보통신학회논문지
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• 제12권8호
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• pp.1401-1407
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• 2008

최근 고령 인구의 증가에 따른 헬스 케어 수요가 증가하고 있고 환자뿐만 아니라 일반인들에게서도 헬스 케어 모니터링에 대한 요구가 급증하고 있다. 또한 의료 서비스를 제공받으려는 대상자의 불편을 최소화하고, 지속적인 모니터링을 통한 헬스 케어가 가능할 수 있는 의료 기술과 의료 정보 서비스에 대한 수요도 늘어나고 있는 추세이다. 본 논문에서는 헬스 케어를 위한 무선 생체신호 모니터링 시스템을 구현하였다. 구현된 시스템은 생체신호 측 정부와 무선 통신부로 구성된 센서 노드(sensor node)와 원격 시스템의 모니터링 프로그램으로 구성된다. 센서 노드에서는 심전도, 혈압, 맥파, 동맥혈산소포화도, 심박수를 측정할 수 있고 블루투스 기술을 이용하여 무선 전송을 하여 모니터링 시스템에서 실시간 무선 모니터링이 가능하도록 구현하였다.

• 재활간호학회지
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• 제4권1호
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• pp.94-104
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• 2001

The purpose of this study was to analysis of nursing interventions performed by the ICU nurses to the patients with cerebrovascular disorder practically from one university hospital in Seoul. The data were collected from 15 nurses with 86 cerebrovascular disorder cases from one ICU with the questionaire to write frequency of nursing care done by the surveyee from May, 2, 2000 to July, 3, 2000 and the list of 66 nursing interventions selected out of 433 NIC(Nursing Interventions Classification) of Iowa University which were translated into Korean (44 items) and core nursing interventions by ICU nurses (22 items; KIm, Su-Jin, 1997). The data were analysed with SPSS program. The results are as follow : 1. The most frequently used nursing interventions were vital sign monitoring, fall prevention, cerebral edema management, dysreflexia management, neurologic monitoring, cardiac care, communication enhancement, technology management, bed rest care, respiratory monitoring in rank. 2. The most frequently used nursing intervention domains were 'Physiological : Complex', 'Physiological : basic', 'Behavior', 'Safty', 'Health system' in rank. In the domain of physiological : basic, the most frequently used nursing interventions were bed rest care, urinary elimination management, tube care : urinary, physical restraints in rank. In the domain of physiological : complex, the most frequently used nursing interventions were cerebral edema management, dysreflexia management, neurologic monitoring, cardiac care in rank. In the domain of behavior, the most frequently used nursing interventions were communication enhancement, touch, active listening in rank. In the domain of safty, the most frequently used nursing interventions were vital sign monitoring, fall prevention in rank. In the domain of health system, the most frequently used nursing interventions were technology management, specimen management in rank. 3. some difference of the frequency practicing the nursing interventions according to the shift of duties was found. For example, medication administration was common at day duty, touch was practiced at evening duty, temperature regulation was performed.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2009년도 학술대회
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• pp.173-177
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• 2009

일상생활에서 활용 가능한 다양한 종류의 생체 신호 획득 및 분석 방법이 연구되고 있다. 기존의 생체 신호 분석 방법은 표준화된 임계치를 사용하여 해석한 결과를 제공하며 신호 측정 당시의 상황이 고려되지 않아 잡음 혹은 외부 환경의 영향을 받기 쉬운 단점이 있다. 본 논문에서는 생체 신호뿐만 아니라 기타 정황정보를 기반으로 하여 개인화된 신호를 분석하기 위한 모델(Personalized Decision Making method, PDM)을 제안한다. 개인화된 신호 해석 모델은 사용자의 맥락 정보, 사용자의 맥락 정보, 사용자의 나이, 성별, 현재의 몸 및 정신 상태, 음식 및 카페인의 섭취 여부, 측정 시간 및 측정 요일 등을 기반으로 각 맥락 간의 연관 관계를 나타내고, 이상적인 사용자의 생체 신호 예측치를 베이즈 정리를 기반으로 획득한다. 개인화된 해석 모델(ACM)을 통해 표준 임계치를 적용한 해석에 비해 인식의 정확도를 높일 수 있으며, 다양한 측정시의 조건을 알면 현재 사용자의 건강상태를 개인화된 분석과 유사한 정확도로 예측이 가능하다. 제안한 방법은 현재 관측된 관측치의 분포를 모르더라도, 현재 사용자의 상태를 맥락정보를 기반으로 하여 예측할 수 있으므로, 일반적인 데이터 모델을 기반으로 개개인에 맞는 얼굴 표정을 인식하는 연구 등에 활용이 가능하다.

• 한국해양생명과학회지
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• 제3권2호
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• pp.87-95
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• 2018

To investigate effects of starvation on physiological changes, stress response, and survival of cobitid loach (Misgurnus anguillicaudatus) exposed to sodium nitrite (NaNO₂), a 4-week experiment was conducted. Fewer fish survived in the starved group than those in the fed group during the experiment. Starvation resulted in growth retardation, leading to differences in body length and body depth between fed and starved groups. The fed gorup continued to grow and remained in good condition. Blood chemical analysis (plasma cortisol and glucose) showed significant differences in stress response to nitrite exposure between fed and starved groups (p < 0.05). These results suggest that all parameters employed in this study to assess effects of starvation with NaNO₂ stress are useful information for researching nutritional status in cobitid loach.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.336-338
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• 2015

This research is to propose an applicable framework for real-time health surveillance and safety monitoring at construction sites. First this study aims at finding (1) a framework for health surveillance that is likely to benefit employers and employees in the industry, (2) a valid way to identify factors or conditions with potential health concerns that can occur under particular work conditions, (3) An effective way to apply wireless/mobile sensors to construction workers using real-time/live data transmission methods, and (4) A relationship between a worker's vital signs and job site environment. Biosensors for physiological response and devices for weather/work related data are to collect real-time data. Relationships between jobs and physiological responses are analyzed and factors that touched particularly contributing to certain responses are identified. When data are incorporated with tasks, factors affecting tasks can be identified to estimate the magnitude of the factors. By comparing work and normal responses possible precautionary actions can be considered. In addition, the study would be lead to improving (1) trade-specific dynamic work schedules for workers which would be based on various factors affecting worker health level and (2) reevaluating worker productivity with health status and work schedule, thereby seeking ways to maximize worker productivity. Through a study, the paper presents expected benefits of implementing health monitoring.

• 대한의용생체공학회:의공학회지
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• 제12권4호
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• pp.235-242
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• 1991

This research has reported that the selection and assessment of treatment in anxiety disorders depend to a large extend on patient reports of somatic symptomatology. However, the correspondence between such reports and actual physiological data Is unknown as the physiological measures used were taken in laboratory. The purpose of the ambulatory momboring device is, therefore, to present for analysis physiological data derived from the sub jects during their daily activities. The physiological parameters of interest are heart rate, respiratory rate, skin conductance level/response, skin temperature, and activity level. This device had an microcomputer based data acquisition unit, Interfaced to it for the purpose of data collection. The data is collected usually over a period of 12 hours. The data from the ambulatory monitoring device can be used to assess the psychophysiology of anxiety in the field. The data from the device will also reveal if patients who report different sets of symptoms differ physiologically too. Thls will help physicians for the right kind of treatment and also solve the many uncertainties that have existed thus far in quantizing anxiety.