• Current Optics and Photonics
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• 제7권4호
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• pp.398-407
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• 2023

We explored a method to evaluate imaging performance for the optimal assembly of an endoscopic miniature lens and a sensor constituting an imaging module at the distal end of gastrointestinal endoscopy. For the assembly of the imaging module, the image sensor was precisely located at the focal plane when collimated light passed through the endoscopic lens. As another method, the distance between the lens and sensor was adjusted to obtain the highest focus index from images measured the star chart of the International Organization for Standardization (ISO) standard at various positions. We analyzed the slanted-edge modulation transfer function (MTF), corresponding depth of field, and number of line pairs for MTF 50% and 20% at each working distance within the range of 5-100 mm for imaging modules assembled in different ways. Assembly conditions of the imaging module with better MTF performance were defined for each working distance range of 5-30 mm and 30-100 mm, respectively. In addition to the MTF performance, the focus index of each assembled module was also compared. In summary, we examined the performance of imaging modules assembled with different methods within the suggested working distance and tried to establish the optimal assembly protocol.

• 한국운동역학회지
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• 제23권4호
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• pp.327-333
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• 2013

The purpose of this study was to investigate the effects of different types of attentional focus(internal focus vs. external focus) on the dart throwing mechanics. Seven expert dart throwing athletes were assigned to an internal focus group and other seven athletes were assigned to an external focus group. Each group was asked to throw dart either under verbal instruction or without instruction. During dart throwing, accuracy(radial error), consistency(bivariate variable error), dart velocity, acceleration, elbow joint ROM, elbow joint angular velocity, EMD(electromechanical delay), iEMG of biceps brachii and triceps brachii, and CI(coactivation index) were collected and analyzed. Nither instruction type nor instruction itself affected in accuracy and consistency. However, in dart velocity and acceleration, there was an interaction between instruction and attentional focus types. Velocity and acceleration increased in the internal condition, where as they decreased in the external condition. The ROM of elbow joint did not affected by instruction and attention type. However, similar to dart velocity and acceleration, angular velocity increased in internal focus group, while it decreased in external focus group. EMG showed no difference with any condition. In conclusion, internal focus is better than external focus for dart throwing.

• 정보화정책
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• 제24권1호
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• pp.48-78
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• 2017

본 연구에서는 공공데이터 개방수준에 미치는 요인을 알아보는 것은 물론 사회자본의 조절효과와 매개효과를 알아보기 위해 총 26개국을 대상으로 공공데이터 개방지수인 ODB와 OUR Index에 대한 다중회귀분석 및 경로분석을 진행하였다. 다중회귀분석결과 종속변수 ODB를 기준으로 할 때 독립변수만을 투입한 모델 1에서는 전자정부, SW시장규모, 정부효과성이 유의미한 정적인 영향을 보였다. 독립변수, 조절변수를 투입한 모델 2에서는 전자정부, SW시장규모, 사회자본이 유의미한 정적인 영향을 보였다. 독립변수, 조절변수, 상호작용항이 투입된 모델 3에서는 전자정부, 사회자본이 유의미한 정적인 영향을 보였다. 종속변수 OUR Index를 기준으로 할 때 모델 1, 모델2에서 전자정부만이 유의미한 정적인 영향을 보였다. 독립변수, 조절변수, 상호작용항이 투입된 모델 3에서는 전자정부, SW시장규모${\times}$사회자본이 유의미한 정적인 영향을 보였다. 경로분석에서는 종속변수 ODB의 대안모형에 대해서 정부효과성만이 사회자본과 완전매개효과를 나타냈다.

• Journal of Information Technology Applications and Management
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• 제11권1호
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• pp.101-115
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• 2004

The goal of this research is to improve SLA index that measures service performance level as a result of outsourcing Information system, and also to identify the best application method. This research identifies SLA applied cases and improving points based on the evidence collected from three major financial institutions that utilized outsourcing. First this study analyzes SLA applied cases of two different companies and discusses SLA application improvement possibilities. It then introduces a successful case of a third company that adopted SLA index.

• 한국지리정보학회지
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• 제13권1호
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• pp.142-154
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• 2010

본 연구는 경상남도 창원시를 대상으로 다양한 도시의 공간적 특성이 지표온도에 미치는 영향성을 분석하고, 도시지역의 유형에 따른 열환경 특성을 파악하고자 한다. 이를 위해 Landsat 5 TM 영상에서 지표온도, NDBI(Normalized Difference Built-up Index), NDVI(Normalized Difference Vegetation Index) 등을 추출하였으며, 고해상도($10cm{\times}10cm$) 칼라항공사진을 토대로 토지이용 및 토지피복 형태를 분류하였다. 공간통계분석의 기본단위는 $500m{\times}500m$의 Vector Grid로 구축하여 각각의 공간특성 인자별 주제도를 작성하였다. 열환경과 공간특성의 관계성을 평가한 결과, 지표온도와 NDBI의 상관계수가 0.929로 가장 높게 나타났으며, 불투수지역의 비율과도 0.857의 높은 상관성을 가지는 것으로 분석되었다. 다음으로 도시지역의 유형을 주거중심, 공업중심, 녹지중심, 혼합의 4개 지역으로 군집 분류하여 유형별 지표온도를 분석한 결과, 공업중심지역의 지표온도가 $21.10^{\circ}C$로 가장 높았고, 녹지중심지역이 $18.85^{\circ}C$로 가장 낮게 평가되었다. 이상의 연구결과는 도시 지역의 공간적 특성이 열환경에 미치는 영향성을 규명하였으며, 향후 열환경 개선을 위한 토지이용계획과 개발밀도 규제 등에 활용 가능할 것으로 판단된다.

• 품질경영학회지
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• 제48권2호
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• pp.329-344
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• 2020

Purpose: The purpose of this study is to measure the Airline Educational Service Quality and to find ways to improve the priority factors that need improvement. Methods: The 267 collected data from the survey of K-airline calculate the Potential Customer Service Improvement Index based on the Kano Model, Timko Customer Satisfaction Index and conduct Focus Group Interview. Results: The satisfaction of Airline Educational Service Quality can be improved if instructor operations are intensively managed considering field experience and contents that can be applied in the field. Conclusion: This study would provide useful information about Airline Educational Service Quality and can be applied to map out strategies to improve the satisfaction of the Airline Educational Service.

• 정보처리학회논문지B
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• 제19B권4호
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• pp.231-236
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• 2012

소비자 행동이론에 따르면 사람의 성향은 향상초점과 예방초점이라는 두 가지 조절초점 유형으로 나누어지며, 이 두 가지 성향은 다양한 영역에 있어서 소비자의 의사결정에 많은 영향을 미치는 것으로 알려져 있다. 본 연구에서는 개인화 추천에서 Cold Start 문제의 최소화 및 추천 알고리즘 성능 개선을 위하여 조절초점이론을 적용한다. 이를 위하여, 웹쇼핑 로그로부터 소비자 별 행동변수, 정보탐색활동성 지수를 추출하고 이를 활용한 소비자 조절초점성향 분류 방법을 제안한다. 본 연구는 사회과학/IT 융합 연구로서 소비자행동 이론의 시스템화 가능성을 입증하였다는 점에 있어서 의의를 지니며, 향후 다양한 분야의 이론들을 적용한 IT 서비스에 대한 연구로 확장하고자 한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권2호
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• pp.542-558
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• 2023

A digital focus index (DFI) is a value used to determine image focus in scientific apparatus and smart devices. Automatic focus (AF) is an iterative and time-consuming procedure; however, its processing time can be reduced using a general processing unit (GPU) and a multi-core processor (MCP). In this study, parallel architectures of a minimax search algorithm (MSA) are applied to two DFIs: range algorithm (RA) and image contrast (CT). The DFIs are based on a histogram; however, the parallel computation of the histogram is conventionally inefficient because of the bank conflict in shared memory. The parallel architectures of RA and CT are constructed using parallel reduction for MSA, which is performed through parallel relative rating of the image pixel pairs and halved the rating in every step. The array size is then decreased to one, and the minimax is determined at the final reduction. Kernels for the architectures are constructed using open source software to make it relatively platform independent. The kernels are tested in a hexa-core PC and an embedded device using Lenna images of various sizes based on the resolutions of industrial cameras. The performance of the kernels for the DFIs was investigated in terms of processing speed and computational acceleration; the maximum acceleration was 32.6× in the best case and the MCP exhibited a higher performance.

• Journal of Preventive Medicine and Public Health
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• 제50권3호
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• pp.201-209
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• 2017

Objectives: The aim of this study was to assess the socioeconomic inequality in malnutrition in under-5 children in Iran in order to help policymakers reduce such inequality. Methods: Data on 8443 under-5 children were extracted from the Iran Multiple Indicator Demographic and Health Survey. The wealth index was used as proxy for socioeconomic status. Socioeconomic inequality in stunting, underweight, and wasting was calculated using the concentration index. The concentration index was calculated for the whole sample, as well as for subcategories defined in terms of categories such as area of residence (urban and rural) and the sex of children. Results: Stunting was observed to be more prevalent than underweight or wasting. The results of the concentration index at the national level, as well as in rural and urban areas and in terms of children's sex, showed that inequality in stunting and underweight was statistically significant and that children in the lower quintiles were more malnourished. The wasting index was not sensitive to socioeconomic status, and its concentration index value was not statistically significant. Conclusions: This study showed that it can be misleading to assess the mean levels of malnutrition at the national level without knowledge of the distribution of malnutrition among socioeconomic groups. Significant socioeconomic inequalities in stunting and underweight were observed at the national level and in both urban and rural areas. Regarding the influence of nutrition on the health and economic well-being of preschool-aged children, it is necessary for the government to focus on taking targeted measures to reduce malnutrition and to focus on poorer groups within society who bear a greater burden of malnutrition.

• 한국콘텐츠학회논문지
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• 제20권12호
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• pp.301-310
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• 2020

본 연구의 목적은 자전거도로의 인프라 데이터 구축을 위한 지표를 선정하고자 함이며, 이를 위해 기존의 자전거도로와 관련된 설계기준 분석을 통해 지표를 도출하였다. 자전거도로의 설계요소가 제시되어 있는 중앙정부 및 지방정부의 설계기준 및 지침을 바탕으로 자전거도로의 속성데이터를 교통, 기하구조, 포장, 안전시설 및 부대시설 등 4개로 구분하여 분석하였다. 도출된 지표는 도로 및 교통분야 전문가들을 대상으로 FGI(Focus Group Interview)을 통한 브레인스토밍을 진행하였으며, 도출된 지표 이외의 추가적인 지표까지 의견을 수렴하였다. 최종적으로 필수 설계요소는 설계속도 및 도로유형, 포장유형, 교통안전시설 등 총 24개가 선정되었으며, 추가 설계요소는 버스/택시 정류장 및 미끄럼저항성(BPN) 등 6개가 선정되었다. 본 연구에서 제시된 24개의 자전거도로대장 지표는 법 개정이 이루어질 경우 반드시 포함되어야 하는 요소로 판단되며, 향후 도로 및 교통전문가 및 도로관리청 등의 의견수렴을 통해 추가적인 6개 지표의 포함여부를 판단할 수 있을 것으로 기대된다.