• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.751-755
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• 2005

We propose a sound source localization method using the Head-Related-Transfer-Function (HRTF) to be implemented in a robot platform. In conventional localization methods, the location of a sound source is estimated from the time delays of wave fronts arriving in each microphone standing in an array formation in free-field. In case of a human head this corresponds to Interaural-Time-Delay (ITD) which is simply the time delay of incoming sound waves between the two ears. Although ITD is an excellent sound cue in stimulating a lateral perception on the horizontal plane, confusion is often raised when tracking the sound location from ITD alone because each sound source and its mirror image about the interaural axis share the same ITD. On the other hand, HRTFs associated with a dummy head microphone system or a robot platform with several microphones contain not only the information regarding proper time delays but also phase and magnitude distortions due to diffraction and scattering by the shading object such as the head and body of the platform. As a result, a set of HRTFs for any given platform provides a substantial amount of information as to the whereabouts of the source once proper analysis can be performed. In this study, we introduce new phase and magnitude criteria to be satisfied by a set of output signals from the microphones in order to find the sound source location in accordance with the HRTF database empirically obtained in an anechoic chamber with the given platform. The suggested method is verified through an experiment in a household environment and compared against the conventional method in performance.

• Journal of Community Nutrition
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• 제3권2호
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• pp.77-86
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• 2001

The purpose of this study was to investigate self-perception and practices of health and appearance, health-related lifestyles and dietary behaviors of college students(137 male, 115 female) attending web class via the Internet. This cross-sectional survey was conducted by a self-administered questionnaire and data was analyzed by SPSS program. The average height, weight and BMI of the male and female college students were 174.4cm, 67.8kg, 22.3kg/㎡ and 162.3cm, 52.1kg, 19.8kg/㎡, respectively. Male collage students perceived their health statuses significantly better compared to female students. As for self-evaluation of anemia, female college students perceived significantly more anemia symptoms compared to male college students. Female college students perceived their body image to be obese compared to male college students. Underweight college students perceived significantly less healthy statuses, more anemia symptoms, and worse hair conditions compared to other college students. The rate of male students who exercise was significantly higher compared to that of female students. Male students reported significantly more smoking and drinking of alcohol compared to female students. The rate of female college students skipping meals was significantly higher than that of male college students. Frequency of eating out in female college students was significantly higher compared to that in male students. These results may provide some basic information in developing a nutrition education program for Korean college students using Internet.

• 대한영양사협회학술지
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• 제6권1호
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• pp.44-52
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• 2000

Two hundred sixty six children were retrospectively surveyed from first to fifth grade to find out the status of obesity during four years. The obesity index was gained by height and weight data from student's health file and the data about eating behaviors and weight control behaviors, etc. were collected by questionnaires. Children assigned to one of the following groups : underweight, normal, overweight and obese. The results were as follows ; 1. Obese children were 18.6%(n=27) of boys and 10.8%(n=13) of girls at fifth grade. 2. Twenty eight children among forty obese children at fifth grade were also overweight or obese at first grade, and the other twelve was normal. 3. Breakfast skipping rate was significantly high among underweight and obese group of boys(p<0.01).The most children(87.6%) had prejudice for special foods. 4. The rate of agreement between obesity index and self recognition of body image was 60.7% in boys and 63.6% in girls. 5. Forty two point five percent of children have ever tried weight control as exercise(35.7%), reducing sugars and snacks(27%), fasting(23.8%), avoiding fatty foods(12.7%), taking diet food or drug(0.8%). In conclusion, the prevalence of children obesity is gradually increasing and children tried weight control without right guidances. In order to prevent progress into adulthood obesity, nutrition education should be followed with school foodservice including the right perception for obesity, proper weight control and eating behavior modification.

• 대한지역사회영양학회지
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• 제9권4호
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• pp.501-510
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• 2004

This study was carried out to investigate the dietary attitudes, nutrition knowledge, nutrient intake, eating-related characteristics of dancing major and non-major female university students. The survey was conducted from October 1 to November 10, 2003 by questionnaires and data analyzed by SPSS program. The results are summarized as follows: 25.5% of the underweight group, 53.6% of the normal weight group, 12.5% of the overweight group and 66.7% of the obese group had correct perception about their body image. Eighty-one point three percent of the dancing majors and 77.2% of the non-majors were concerned about weight control, and 71.3% of the dancing majors and 64.5% of the non-majors had weight control experiences. There were no significant differences in nutrition knowledge scores and dietary attitude scores between dancing majors and non-majors. There were no significant differences in ‘predisposition to obesity scores’ between dancing majors and non-majors, and the scores were low. ‘Predisposition to anorexia’ scores and ‘uncontrollable urges to eat’ scores were significantly higher in the dancing majors compared to the non-majors. Intakes of the nutrients were lower than those of the Korean recommended dietary allowances (RDAs), except vitamin C in the dancing majors. Intakes of calories, calcium and iron were lower than those of the RDAs in the non-majors. Dietary attitude was positively correlated with nutrition knowledge but was negatively correlated with ‘uncont-rollable urges to eat’. In the dancing majors, ‘predisposition to obesity’ showed significantly positive correlation with obesity rate and ‘uncontrollable urges to eat’ and was negatively correlated with nutrition knowledge and dietary attitude. In the non-majors, obesity rate showed positive correlation with ‘predisposition to obesity’ and ‘uncontrollable urges to eat’. Therefore proper nutritional education program and recommended dietary allowances are required for dancing majors to improve their nutritional status.

• 한국식생활문화학회지
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• 제21권4호
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• pp.366-374
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• 2006

This study was carried out to compared the characteristics of the underweight university students with those of overweight university students. The surey was carried out by self-questionnaires with 97 underweight and 156 overweight university students. The results are summarized as fellows. Breakfast was skipped in 37.1% of underweight and 46.2% of overweight students and it appeared overweight students eat faster than underweight students. The 16.5% of underweight and 75.0% of overweight students have correct perception about their body image. The percentage of weight control experience were 25.8and 55.8 in the underweight and overweight students, respectively. Blood levels of lipid profiles(triglyceride, LDL cholesterol, and HDL cholesterol), hemoglobin, AST and ALT were anaylzed. Plasma levels of triglyceride, total cholesterol, LDL cholesterol, and HDL cholesterol of underweight students were 96.41, 143.75, 97.53 and 56.27 mg/dl, and those of overweight students were 107.99, 164.31, 100.08 and 53.64 mg/dl, respectively. Blood parameters were in normal range in both group. Plasma triglyceride, total cholesterol and LDL cholesterol levels o( overweight students were higher than those of underweight students. On the other hand, plasma HDL cholesterol levels of overweight students were lower than those of underweight students. Plasma levels of AST and ALT were in normal range in both group. However, AST and ALT levels of overweight students were higher than that of underweight students. Therefore they should have a nutritional education program to improve their dietary and living habits for overweight students' health. And nutritional education program should be organized practically and systematically

• 한국가정과교육학회지
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• 제20권3호
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• pp.201-213
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• 2008

본 연구에서는 여고생들의 라이프스타일과 교복변형행동의 관련성이 있는지 알아보고 이를 토대로 여고생들의 올바른 교복착용을 위한 의생활지도의 기초자료를 제공하고자 하였다. 이를 위해 광주광역시 소재의 인문계, 전문계 고등학교 6개교 1, 2학년 학생 602명의 여고생을 대상으로 설문조사를 하였으며, 설문 자료의 분석은 SPSS WIN 12.0(Kr)을 사용하여 요인분석, K-평균 군집분석, 일원배치 분산분석(one-way ANOVA)을 실행하였다. 그 결과를 요약하면 다음과 같다. 본 연구에서는 여고생들의 라이프스타일에 따른 교복변형행동의 차이를 살펴보았으며 라이프스타일 유형간의 차이가 유의하게 크지는 않았다. 대부분의 여고생들은 교복변형을 찬성하고 있어 먼저 일반적 의복행동으로 이해되었으며 다음으로 라이프스타일의 영향을 받고 있었는데 디지털의존스타일이 다른 라이프스타일 유형과 다른 경향이 있었다. 따라서 학생문화의 하나로 자리 잡고 있는 학생들의 교복변형에 대해 정해진 규율에 맞춰 엄격히 단속하기보다 일정한 범위를 두어 개성을 표현하게하거나 속옷을 갖추어 착용하게 지도하는 것이 바람직하지 않을까 생각된다. 물론 교복의 기성복화에 따른 유행의 반영은 받아들이더라도 신체가 드러나서 부정적인 이미지를 주는 경우라면 적극적인 생활지도가 필요하리라고 생각된다.

• Journal of Nutrition and Health
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• 제53권6호
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• pp.613-628
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• 2020

본 연구는 전북지역 334명의 중년여성을 대상으로 건강염려, 건강증진행동 및 삶의 질의 수준을 조사하였으며, 그 결과를 요약하면 다음과 같다. 건강염려의 총점은 60점 중 37.64점으로 보통수준, 전체 평균값은 3.14점이었다. 하위항목 중 건강습관이 3.51점으로 가장 높았다. '흡연과 같은 해로운 습관을 피한다'가 4.04점으로 가장 높으며, '건강에 대하여 걱정한다'가 2.30점으로 가장 낮았다. 건강증진의 총점은 115점 중 79.18점으로 보통수준, 전체 평균값은 3.44점이었다. 하위항목 중 생활습관이 4.09점으로 가장 높았다. 문항 중 '흡연을 하지 않는다'가 4.25점으로 가장 높으며, '미역, 김, 다시마, 멸치, 우유 등을 자주 섭취한다'가 2.48점으로 가장 낮았다. 삶의 질의 총점은 150점 중 101.18점으로 보통수준이며, 전체 평균값은 3.37점이었다. 하위항목 중 사회적 요인이 3.63점으로 가장 높았다, '자녀와의 관계만족'이 3.72점으로 가장 높았으며, '전반적인 건강상태 만족'이 2.95점으로 가장 낮았다. 조사대상자의 일반적인 특성에 따른 건강염려는 'BMI', '가계월수입', '직업', '질병여부', '체중만족', '체중조절 관심'에서 유의한 차이가 있었다. 건강증진행동은 '연령, 'BMI', '가계월수입', '생리여부', '건강보조식품섭취', '체형인식', '체형만족도'에서 유의한 차이가 있었다. 삶의 질은 'BMI', '가계월수입', '학력', '직업', '질병여부', '체중만족'에서 유의한 차이가 있었다. 삶의 질에 미치는 관련변수들의 상대적 영향력을 알아본 결과, 삶의 질에 대한 전체 1단계에서 BMI '18.5 이상 23.0 미만', 질병 '없음', 가계월수입 '500만원 이상'의 순이며, 설명력은 17.4%이었다. 2단계에서 건강염려 요인 투입에 따른 총 설명력은 23.2%이며, '건강염려'의 영향력이 가장 크며, 그 다음은 질병 '없음', 가계월수입 '500만원 이상'의 순이었다. 3단계 건강증진행동 요인 투입에 따른 총 설명력은 40.8%이었다. 삶의 질에 대한 예측변인의 영향력은 '건강증진행동', 질병 '없음', '건강염려'의 순이었다. 이상의 결과, 전북지역 중년여성의 건강염려 수준과 건강증진 행동은 보통수준이었다. 그러나 건강증진행동은 실제 삶의 질에 큰 영향력을 가지고 있었다. 특히, 질병 없는 건강상태는 건강증진행동을 실천하는데 중요한 동기부여가 될 수 있다. 따라서 건강염려 수준을 적절히 유지하며, 신체적 변화기에 있는 중년여성들의 건강관리 능력을 높이는 것이 삶의 질을 높이는 방안이라 판단된다.

• 대한핵의학회지
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• 제18권2호
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• pp.17-23
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• 1984

For nearly a century it has been known that chemical activity accompanies mental activity, but only recently has it been possible to begin to examine its exact nature. Positron-emitting radioactive tracers have made it possible to study the chemistry of the human mind in health and disease, using chiefly cyclotron-produced radionuclides, carbon-11, fluorine-18 and oxygen-15. It is now well established that measurable increases in regional cerebral blood flow, glucose and oxygen metabolism accompany the mental functions of perception, cognition, emotion and motion. On May 25, 1983 the first imaging of a neuroreceptor in the human brain was accomplished with carbon-11 methyl spiperone, a ligand that binds preferentially to dopamine-2 receptors, 80% of which are located in the caudate nucleus and putamen. Quantitative imaging of serotonin-2, opiate, benzodiazapine and muscarinic cholinergic receptors has subsequently been accomplished. In studies of normal men and women, it has been found that dopamine and serotonin receptor activity decreases dramatically with age, such a decrease being more pronounced in men than in women and greater in the case of dopamine receptors than serotonin-2 receptors. Preliminary studies in patients with neuropsychiatric disorders suggests that dopamine-2 receptor activity is diminished in the caudate nucleus of patients with Huntington's disease. Positron tomography permits quantitative assay of picomolar quantities of neuro-receptors within the living human brain. Studies of patients with Parkinson's disease, Alzheimer's disease, depression, anxiety, schizophrenia, acute and chronic pain states and drug addiction are now in progress. The growth of any scientific field is based on a paradigm or set of ideas that the community of scientists accepts. The unifying principle of nuclear medicine is the tracer principle applied to the study of human disease. Nineteen hundred and sixty-three was a landmark year in which technetium-99m and the Anger camera combined to move the field from its latent stage into a second stage characterized by exponential growth within the framework of the paradigm. The third stage, characterized by gradually declining growth, began in 1973. Faced with competing advances, such as computed tomography and ultrasonography, proponents and participants in the field of nuclear medicine began to search for greener pastures or to pursue narrow sub-specialties. Research became characterized by refinements of existing techniques. In 1983 nuclear medicine experienced what could be a profound change. A new paradigm was born when it was demonstrated that, despite their extremely low chemical concentrations, in the picomolar range, it was possible to image and quantify the distribution of receptors in the human body. Thus, nuclear medicine was able to move beyond physiology into biochemistry and pharmacology. Fundamental to the science of pharmacology is the concept that many drugs and endogenous substances, such as neurotransmitters, react with specific macromolecules that mediate their pharmacologic actions. Such receptors are usually identified in the study of excised tissues, cells or cell membranes, or in autoradiographic studies in animals. The first imaging and quantification of a neuroreceptor in a living human being was performed on May 25, 1983 and reported in the September 23, 1983 issue of SCIENCE. The study involved the development and use of carbon-11 N-methyl spiperone (NMSP), a drug with a high affinity for dopamine receptors. Since then, studies of dopamine and serotonin receptors have been carried out in over 100 normal persons or patients with various neuropsychiatric disorders. Exactly one year later, the first imaging of opitate receptors in a living human being was performed [1].

• Journal of Nutrition and Health
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• 제44권2호
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• pp.131-139
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• 2011

본 연구는 울산지역에 거주하는 12~19세의 남녀 청소년 중 저체중군과 과체중군을 대상으로 일반적 생활습관특성, 학업성취도 및 간식섭취행동을 조사하였으며, 그 결과는 다음과 같다. 조사대상자는 저체중군 333명, 비만군 131명으로 구성되었으며, 저체중군의 평균 BMI는 $16.90{\pm}1.19\;kg/m^2$, 과체중군은 $25.38{\pm}2.16\;kg/m^2$으로 나타났다. 성별로 보면 저체중군은 여학생이, 과체중군은 남학생이 많았으며, 연령 별로는 12~14세보다 15세 이상에서 더 뚜렷한 결과를 보였다 (p < 0.01). 저체중군은 자신이 마른편임에도 보통이거나 뚱뚱하다고 잘못 인식 (50.4%)하였으며, 과체군의 94.7%는 자신이 뚱뚱하다고 바르게 인식하고 있었다 (p < 0.001). 학업성적이 하위권에 속하는 군에서는 저체중보다 과체중이 많은 경향을 보였으며, 취침시간에서는 밤12시 이후에 잠을 자는 비율이 과체중군 (66.4%)이 저체중군 (58.9%) 보다 많이 나타났다. 저체중군은 하루 1회 이상 간식을 섭취하는 비율이 36.3%였으며, 과체중군은 22.9%로 간식섭취횟수가 저체중군과 과체중군에서 유의적인 차이를 보였다 (p < 0.05). 간식섭취식품으로 과일, 우유 및 유제품과 커피를 제외하고는 저체중군의 섭취빈도가 높았으며, 학업성적이 좋을수록 우유 및 유제품과 과일을 자주 섭취하였고 (p < 0.01), 학업성적이 낮을 수록 감자튀김, 탄산음료, 사탕 및 초콜릿류, 쿠키, 케익과 빵, 팝콘 등을 자주 섭취하는 것으로 나타났다 (p < 0.001). 이상의 연구결과에서 청소년들은 과체중군 뿐만 아니라 저체중군의 건강관리에 관심을 가져야 할 것으로 생각된다. 대부분의 청소년들이 간식 섭취시 부족한 영양보충과 성장 발육에 도움이 되는 식품을 선택하기보다는 맛을 위주로 선택하였으며, 특히 저체중군은 간식섭취횟수가 과체중군보다 많았으며, 이로 인해 규칙적인 식사가 이루어지지 않았고, 과체중군은 취침시간이 저체중군보다 늦었으며, 학업성적도 낮은 것으로 나타났다. 이와 같이 청소년은 외모에 많은 관심을 가지고 있으며, 잘못된 미적기준으로 인해 저체중군은 자신의 체형을 제대로 인식하지 못하고, 잦은 간식섭취를 통해 식사를 대신함으로써 건강에 악영향을 미칠 수 있으며, 과체중군은 간식섭취빈도는 낮지만 늦은 취침시간으로 인해 체중조절을 위해 참았던 식욕을 야식 등으로 대신하는 경향을 보여주어 저체중군과 과체중군 모두 잘못된 생활습관을 반복하고, 학업에도 큰 영향을 미치는 것으로 나타났다. 두 집단 모두 영양교육의 대상자임을 인식하고, 적극적이고 시기적절한 생활습관 개선과 올바른 영양교육이 이루어져야 할 것으로 생각된다. 따라서 가정과 학교에서는 청소년기의 특성을 이해하고 고려하여 현명한 식품선택과 건강한 생활습관을 가질 수 있도록 지속적이고 실질적인 교육과 훈련이 필요하다고 하겠다.