• 대한지역사회영양학회지
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• 제27권6호
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• pp.468-479
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• 2022

Objectives: This study investigates dietary supplement intakes by examining the characteristics of dietary and health-related behaviors. Data were obtained from the Korea National Health and Nutrition Examination Survey (KNHANES). Dietary and health-related behaviors were also examined before and after the occurrence of COVID-19 and household types (multi-members vs. single person). Methods: Data used in this study were collected from the 2019-2020 KNHANES by including adults aged 19 to 64 years. Pregnant, lactating, and subjects consuming calories less than 500 and more than 5,000 were excluded. Differences in dietary and health-related behaviors before and after COVID-19, and between the two types of households were analyzed by Chi-square analyses using Rao-Scott. Logistic regression analyses were applied to determine which dietary and health-related behaviors affected the dietary supplement intakes. In addition, descriptive analysis was run for demographic characteristics. Results: The dietary supplement intake rate differed significantly with respect to the gender, age, education, marital status, and household income. Dietary supplement intakes, frequency of eating out, obesity, and body weight changes were significantly different before and after COVID-19. In addition, meal evaluation, frequency of eating out, drinking, smoking, activity, subjective health evaluation, and body weight changes showed significant differences by household type. Attitude towards nutrition, activity, meal evaluation, obesity, and smoking were factors that affected the intake of dietary supplements. Conclusions: While increased intake of dietary supplements is a prevalent phenomenon, this intake needs to be monitored and studied closely, considering the sociodemographic characteristics and dietary and health-related behaviors. Furthermore, the dietary supplement intake trend after COVID-19 needs to be studied along with food intake.

• 여성건강간호학회지
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• 제8권3호
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• pp.325-334
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• 2002

To identify strategies to prevent sexual problems in teenage girls, respondents in this study answered two open-ended questions: "What are strategies for teenage school girls to prevent unwanted coitus?" and "What are strategies for teenage girls to prevent pregnancy?" The respondents were 12,733 girls from an accessible population of 19,000, a multi-stage cluster sample from a population of 1,988,902 girls attending 4,684 schools in the seven largest cities and nine provinces in Korea. Data were collected by mail between October 2 and October 28, 2000. The response rate was 68.9%. The total number of responses for the first question was 10,345, and for the second, 9,624. Data were analyzed by content analysis. The results of this study are: 1. According to priority, frequent strategies to prevent unwanted coitus were, self assertiveness (35.7%), heterosexual interaction training (24.6%), sex education (21.2%), and innovations in the system of social culture (4.7%). The order of priority was the same whether the respondents had experienced coitus or not. 2. According to priority, frequent strategies to prevent pregnancy were, heterosexual interaction training (27.4%), sex education (26.2%), contraceptive use and induced abortion (21.4%), and innovations in the system of social culture (3.2%). The first priority for the respondents who had not experienced coitus was heterosexual interaction training (27.7%) but contraceptive use (35.5%) was the first priority for the group who had experienced coitus. In sex education, a focus on contraceptive use for teenage girls who have experienced coitus and on heterosexual interaction training for those who have not, would strengthen preventive strategies for these two sexual problems. Assertiveness training as part of sex education would further strengthen prevention strategies.

• Structural Engineering and Mechanics
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• 제86권1호
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• pp.119-137
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• 2023

The purpose of this research is to assess the performance of CBN and ceramic tools during the dry turning of gray cast iron EN GJL-350. During the turning operation, the variable machining parameters are cutting speed, feed rate, depth of cut and type of the cutting material. This contribution consists of two sections, the first one deals with the performance evaluation of four materials in terms of evolution of flank wear, surface roughness (2D and 3D) and cutting forces. The focus of the second section is on statistical analysis, followed by modeling and optimization. The experiments are conducted according to the Taguchi design L₃₂ and based on ANOVA approach to quantify the impact of input factors on the output parameters, namely, the surface roughness (Ra), the cutting force (Fz), the cutting power (Pc), specific cutting energy (Ecs). The RSM method was used to create prediction models of several technical factors (Ra, Fz, Pc, Ecs and MRR). Subsequently, the desirability function approach was used to achieve a multi-objective optimization that encompasses the output parameters simultaneously. The aim is to obtain optimal cutting regimes, following several cases of optimization often encountered in industry. The results found show that the CBN tool is the most efficient cutting material compared to the three ceramics. The optimal combination for the first case where the importance is the same for the different outputs is Vc=660 m/min, f=0.116 mm/rev, ap=0.232 mm and the material CBN. The optimization results have been verified by carrying out confirmation tests.

• 한국정보통신학회논문지
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• 제26권11호
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• pp.1729-1740
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• 2022

근래 정보의 다양성과 활용에 따라 많은 데이터가 생성되었고, 데이터를 수집, 저장, 가공 및 예측 하는 빅데이터 분석의 중요성이 확대되었으며, 필요한 정보만을 수집할 수 있는 능력이 요구되고 있다. 웹 공간은 절반 이상이 텍스트로 이루어져 있고, 유저들의 유기적인 상호작용을 통해 수많은 데이터가 발생한다. 대표적인 텍스트 데이터 수집 방법으로 크롤링 기법이 있으나 데이터를 가져올 수 있는 방법에 치중되어 웹 서버나 관리자를 배려하지 못하는 크롤러가 많이 개발되고 있다. 본 논문에서는 크롤링 과정에서 발생할 수 있는 문제점 및 고려해야 할 주의사항에 대해 살펴보고 효율적으로 데이터를 가져올 수 있는 개선된 동적 웹 크롤러를 설계 및 구현한다. 기존 크롤러의 문제점들을 개선한 크롤러는 멀티프로세스로 설계되어 작업소요 시간이 평균적으로 4배정도 감소하였다.

• 분석과 대안
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• 제2권2호
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• pp.93-110
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• 2018

Due to its speciality, Johannesburg has drawn wide attention from the international academia, which the existing urban theory cannot easily explain. This paper focuses on the spatial pattern of Johannesburg, and finds that it is highly fragmented: first North-South Division due to apartheid and gold mining, secondly, the continuous sprawl due to population densification, and thirdly formation of city-region due to the fill-in spatial policy. The fragmented spatial pattern undermines the social integration and weakens the potential economic sustainability, which make the balanced multi-core spatial pattern inevitable under the influence of the international planning thought. The Johannesburg's spatial transformation comes not only from social integration, but also from the development vison of world-class status of an African city. In reality, since the collapse of apartheid, the municipal government has released series of strategic planning in different executive phase. These different plannings unanimously focus on the world class status although since 2008, the social inclusiveness is more emphasized. Thus, Johannesburg implements some spatial policies, as promoting the corridor of freedom, identifying the key nodes in the city then developing with high density, implementing the in-filling policy, managing the urban growth boundary, effectively preserving the natural system. However, the industrial structure in Johannesburg is already quite high-ended which cannot produce many jobs and also require much investment in advanced infrastructure. Thus, the strategic goals of world-class status of an African city and social inclusiveness which really need widely shared public services to some extent are in tension. After evaluation, we can see that spatial transformation is quite limited. Obviously spatial transformation largely depends on the social-economy. The population is still in flow. In this sense Johannesburg must energetically support the employment-based industry, effectively control the spatial sprawl and carry out institutional innovation which further incentive investment, gradually build an integrated regional governance. In general, how Johannesburg combines globalization and its own condition is still worth thinking in both theory and practice.

• 한국식생활문화학회지
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• 제25권6호
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• pp.725-733
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• 2010

This study examined the understanding and use of information on nutrition labels based on one serving size among female consumers above the age of 20 in Seoul area. According to the survey, 69.9% of respondents were aware of the current system of nutrition labeling based on one serving size, and 51.8% of the respondents expressed their dissatisfaction with the system because the nutrition labels were difficult to understand or appeared unreliable. The nutrition label literacy of the consumers varied with respect to different packaging units. The respondents were likely to be less accurate in calculating the expected caloric intake when only portions of a multi-serving package were used. Initially 69.0% of respondents reported that they had read the nutrition label before purchasing a product but 91.9% of respondents said that they would check the label after learning how to read the label properly. It is very important to make consumers aware that the labels are very reliable sources of nutrition information. A public education campaign on the use of nutrition labels should focus on developing the consumers' ability and skills in using the label information when choosing foods.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.110-113
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• 2022

신호를 제어하는 방식은기존의 전통적인 수학적 방식을 이용한 최적화를 넘어 이제 인공지능이 본격적으로 활용되기 시작하는 단계까지 발전하였다. 이에 따라 인공지능을 적용하는 방안에 대해 다양한 연구들이 진행되고 있는데, 현행 연구에서는 주로 좋은 교통 상황에 대한 마땅한 고려 없이 간단히 지체도만을 고려하여 보상함수를 설정하는 방식을 주로 채택하고 있다. 그러나 이 경우 현실성이 떨어지는 신호 제어 방식을 인공지능이 학습할 가능성이 존재한다는 문제점을 지닐 뿐더러, 보상 함수에서 좋다고 평가하는 것이 실질적인 서비스 수준의 정의에 부합하지 않음을 확인할 수 있다. 따라서 본 연구에서는 기존의 보상함수 설정 사례를 분석하고, 개선 방향을 제시하고자 한다.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.279-286
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• 2013

This paper introduces a new method for identification of building energy performance problems. The presented method is based on automated analysis and visualization of deviations between actual and expected energy performance of the building using EPAR (Energy Performance Augmented Reality) models. For generating EPAR models, during building inspections, energy auditors collect a large number of digital and thermal imagery using a consumer-level single thermal camera that has a built-in digital lens. Based on a pipeline of image-based 3D reconstruction algorithms built on GPU and multi-core CPU architecture, 3D geometrical and thermal point cloud models of the building under inspection are automatically generated and integrated. Then, the resulting actual 3D spatio-thermal model and the expected energy performance model simulated using computational fluid dynamics (CFD) analysis are superimposed within an augmented reality environment. Based on the resulting EPAR models which jointly visualize the actual and expected energy performance of the building under inspection, two new algorithms are introduced for quick and reliable identification of potential performance problems: 1) 3D thermal mesh modeling using k-d trees and nearest neighbor searching to automate calculation of temperature deviations; and 2) automated visualization of performance deviations using a metaphor based on traffic light colors. The proposed EPAR v2.0 modeling method is validated on several interior locations of a residential building and an instructional facility. Our empirical observations show that the automated energy performance analysis using EPAR models enables performance deviations to be rapidly and accurately identified. The visualization of performance deviations in 3D enables auditors to easily identify potential building performance problems. Rather than manually analyzing thermal imagery, auditors can focus on other important tasks such as evaluating possible remedial alternatives.

• 인터넷정보학회논문지
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• 제25권1호
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• pp.9-15
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• 2024

가상현실 기술의 대중화에 따라 가상환경과 사용자 간의 자연스럽고 효율적인 상호작용에 대한 수요가 높아지고 있다. 이러한 수요에 대응하는 솔루션 중 하나인 공중 조작(mid-air manipulation)은 사용자가 객체와 접촉하지 않은 상태에서 3차원 공간의 가상객체를 조작할 수 있도록 한다. 본 논문에서는 시각적으로 객체를 표현하고 객체의 무게에 대한 촉감 정보를 제공하면서 원격의 가상객체를 조작하는 데 초점을 맞췄다. 본 연구진은 사용자 손끝에 가상객체 무게에 대한 촉감 또는 진동 촉감 피드백을 제공할 수 있는 두 가지 유형의 착용 가능한 인터페이스를 개발했다. 가상객체 조작 중에 원격 객체 무게에 대한 지각을 평가하기 위해 인지 실험을 수행했다. 실험 결과는 촉감 정보 전달이 원격 가상객체 조작 중 무게 인지에 유의한 영향을 미친다는 것을 나타낸다.

• 대한약침학회지
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• 제27권2호
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• pp.123-130
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• 2024

Objectives: Post-operative urinary retention (POUR) is a frequent complication following surgical procedures, characterized by an acute inability to void, leading to additional complications and extended hospitalization. Acupuncture has been shown to be effective in facilitating spontaneous urination and alleviating anxiety in patients experiencing poor urination. The present study aims to evaluate the effectiveness of electroacupuncture in the management of POUR in patients who have undergone lumbar spine surgery. Methods: This retrospective study conducted at the National Hospital of Acupuncture in Vietnam and reviewed the medical records of patients over 18 years old who underwent lumbar spine surgery and were diagnosed with POUR between January to December 2019. Electroacupuncture was administered at five specific acupuncture points: Qugu (CV2), Zhongji (CV3), Zhibian (BL54), Pangguanshu (BL28), and Kunlun (BL60). This study monitored key parameters related to the effectiveness of the acupuncture treatment, including the number of acupuncture treatment sessions required until a patient was successfully treated was recorded, with a maximum of three acupuncture treatment sessions per patient, the time elapsed until urination following the treatment (minutes), and urinary bladder volume before and after treatment (mL). Results: The study demonstrated a 93.3% success rate in treating POUR with electroacupuncture. A significant reduction in post-void residual volume was noted, and patients could void within 30 minutes post-treatment. No significant differences in treatment effectiveness were observed across difference genders and age groups. Conclusion: Electroacupuncture proved to be a highly effective treatment for POUR in patients post-lumbar spine surgery, with a rapid response time and substantial reduction in PVR. However, the retrospective nature of the study and single-center focus limit its generalizability. Future research incorporating randomized controlled trials or multi-center observational studies are recommended to validate these findings and explore the potential of acupuncture in POUR management on a broader scale.