• ETRI Journal
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• 제37권5호
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• pp.1001-1011
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• 2015

Since just-in-time (JIT) has considerable overhead to detect hot spots and compile them at runtime, using sophisticated optimization techniques for embedded devices means that any resulting performance improvements will be limited. In this paper, we introduce a novel static Dalvik bytecode optimization framework, as a complementary compilation of the Dalvik virtual machine, to improve the performance of Android applications. Our system generates optimized Dalvik bytecodes by using Low Level Virtual Machine (LLVM). A major obstacle in using LLVM for optimizing Dalvik bytecodes is determining how to handle the high-level language features of the Dalvik bytecode in LLVM IR and how to optimize LLVM IR conforming to the language information of the Dalvik bytecode. To this end, we annotate the high-level language features of Dalvik bytecode to LLVM IR and successfully optimize Dalvik bytecodes through instruction selection processes. Our experimental results show that our system with JIT improves the performance of Android applications by up to 6.08 times, and surpasses JIT by up to 4.34 times.

• 한국과학교육학회지
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• 제39권1호
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• pp.35-44
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• 2019

현재 대학에 입학하는 이공계 학생들은 거의 대부분의 학과에서 일반 화학 및 일반화학실험 교과를 수강하도록 하고 있는데, 대학에 입학하는 이공계 신입생들은 기초과학 교과의 학습과 관련해 저마다 다른 학습 기초를 가지고 있다. 대학입시와 관련해서도 현재의 수능 제도가 단순이 선발용으로 활용되고 있어 저마다 다른 수준의 기초지식을 가지고 있다. 하지만 이런 현황이 고려되지 않은 채, 이공계 학생들 모두가 동일한 기초과학교과 수업에 참여하고 있기 때문에 어떤 학습자들은 비교적 수월하게 학습에 적응하는가 하면 어떤 학생들은 극심한 어려움을 겪으며, 급기야 포기하는 상황까지 속출하고 있는 실정이다. 이에 본 연구에서는 수도권 H 대학의 이공계 신입생들을 대상으로 일반화학을 잘 학습할 수 있는 능력을 측정하는 척도를 개발한 후 이를 활용하여 학습자의 어떤 학습배경이 일반화학학습적성과 관련이 있는지 분석해 보았다. 분석결과 성별과 전공은 일반화학 학습전공과 관련이 없는 것으로 나타났으며, 전공이 화학과 밀접한 관련이 있는가와 고교에서의 화학학습 정도, 수능에서의 선택여부와 일반화학학습적성이 관련이 있는 것으로 나타났다. 또한 선행학습이 현재의 학습에 도움이 된다고 느끼는 정도나 현재학습과 공통된다고 느끼는 정도 역시 일반화학학습 적성과 관련이 있는 요인임을 알 수 있었다. 이에 본 연구에서는 전공별로 학습에 대한 가이드를 구체적으로 제시 홍보하는 방안과 다른 하나는 학생들의 수준을 고려한 단계별 학습 체계를 수립하는 방안 등 두 가지 방안을 제안하였다.

• 기본간호학회지
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• 제8권2호
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• pp.132-146
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• 2001

Purpose: This study was to analyze the trends and content of all the research (171 research papers) published in the Journal of Fundamentals of Nursing from 1994, when it began to 2000 using an objective tool developed by the researches, and to identify the direction for the future research in Fundamentals of Nursing. Method: Research published in the Journal of Fundamentals of Nursing from 1994 were reviewed. Result: Most of research (94.2%) was non-degree based and funded research was very limited. The average number of researchers per research study was 2.2 and collaborative research has been gradually increasing. The total number of key words was 331 and the average was 2.6 per research. The major key words were not different from other nursing departments and included home care nursing (10 times), health promotion (8 times), self-care (7 times). self-efficacy (7 times), and homo-dialysis (6 times). Eighty seven percent of the research was quantitative research. and there were very few qualitative studies. Considering theory level, it was found that 40% were factor related research For study design, non-experimental studies were most frequent (66%), and the rate, especially of surveys, has remarkably decreased. Selection of subjects by convenience sampling, was most frequent and there were very few studies that provided the rationale for the calculation of sample size. The major subjects of study were patients (44.8%) with various diagnoses. The subjects usually gave oral consent to take part in that study. Giving information (46.9%) and exercise (26.5%) were common nursing interventions, and physiological indices (16.5%). vital signs (10.3%), physical functioning (8.2%), level of knowledge/skill (7.2%) and level of activity (6.2%) were frequently measured as outcome. Variables questionnaires were the major approach used to collect data, and 57.8% of the research provided the Cronbach alpha to guarantee internal consistency of study instruments. Data were analyzed with computerized statistical packages using, ANOVA (42.0%), T test(39.5%), and chi-square test. For the last seven years, nursing research in Fundamentals of Nursing has gradually improved in both quantify and quality. Conclusion: It was difficult to find any uniqueness or difference compared to other departments of nursing. In fact, because the history of the Journal of Fundamentals of Nursing is rather short, we can expect that there will be further improvement in qualify and content in the future.

• 한국조리학회지
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• 제17권3호
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• pp.65-75
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• 2011

본 연구는 급식업체 소비자를 대상으로 만족과 사후행동에 관한 연관관계를 살펴보고자 하였다. 선행연구를 통해 도출된 14개의 속성을 바탕으로 요인분석과 회귀분석을 통해 만족을 규정하였다. 급식업체 소비자를 대상으로 총 281개의 응답을 확보하였고, SPSS 18.0 ver을 활용하였다. 요인분석결과 베리맥스 회전방식을 채택하였으며, KMO값은 0.634, $x^2$=610.084, 유의확률 p<0.001, 총분산 설명력은 61.685%로 나타났다. 5개의 요인이 도출되었고, 각각 재료 음식, 메뉴, 관리, 대부환경으로 명명하였다. 타당성을 나타내는 크롬바하 알파계수는 0.703으로 나타났다. 설명력 16.3%에 만족에는 재료, 관리, 내적환경이 만족도에 영향을 미치는 것으로 나타났다. 사후행동에 미치는 영향에는 유의수준이 p<0.001로 나타났지만, 다른 산업분야에 비해 낮은 것으로 나타났다. 본 연구의 한계는 대학의 급식업체 소비자를 대상으로 하여 일반화의 한계점을 갖고 있으며, 후속연구가 지속적으로 필요하다.

• 한국병원경영학회지
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• 제5권2호
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• pp.59-77
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• 2000

There are increasing interest and need for information on health care consumer with the significance of hospital marketing and strategic planning being increasingly emphasized. This study was conducted to investigate the criteria for selection of medical facilities according to the characteristics of cataract patient. In order to investigate the major factors affecting selection of medical facilities by cataract patient, 300 subjects of cataract patients who was operated at 5 various medical care facilities were selected. Questionnaires are given on March, 2000 and 273 questionnaires were collected. Two types of hospitals(Eye Hospital and University hospital) were combined and analyzed. The main results of this research is as following; 1. In general characteristics of the patients, the variables shown statistically a significant difference between Eye Hospital and University Hospital; The6 educational level and average income are significantly higher in University Hospital Patient. 2. University Hospitals were preferred by the factors of social relationship, social reputation. The critical factors in reference for Eye hospital were kindness, service speed and convenience. This study can be used as a baseline data for marketing planning of hospital management. But the study may be limited in that the results cannot be generalized due to its small sample size and not being able to reflect demographic variables and life style. Further studies to investigate the hospital consumer behavior will be needed.

• 한국의학물리학회지:의학물리
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• 제1권1호
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• pp.23-29
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• 1990

In order to explane the stereotactic procedure, the three steps of the procedure (target localization, dose planning, and radiation treatment) must be examined separately. The ultimate accuracy of the full procedure is dependent on each of these steps and on the consistancy of the approach The concern in this article was about dose planning, which is a important factor to the success of radiation treatment. The major factor in dose planning is a dosimetry system to evaluate the dose delivered to the target and normal tissues in the patient, while it generates an optimal dose distribution that will satisfy a set of clinical criteria for the patient. A three-dimensional treatment planning program is a prerequisite for treatment plan optimization. It must cover 3-D methods for representing the patient, the dose distributions, and beam settings. The major problems and possible modelings about 3-D factors and optimization technique were discussed to simplify and solve the problems associatied with 3-D optimization, with relative ease and efficiency. These modification can simplify the optimization problem while saving time, and can be used to develop reference dose planning system to prepare standard guideline for the selection of optimum beam parameters, such as the target position, collimator size, arc spacing, the variation in arc length and weight. The method yields good results which can then be simulated and tailored to the individual case. The procedure needed for dose planning in stereotactic radiosurgery is shown in figure 1.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권5호
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• pp.1929-1950
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• 2020

Reliable and secure data transmission in the application environment assisted by the wireless sensor network is one of the major challenges. Problem like blind forwarding and data inaccessibility affect the efficiency of overall infrastructure performance. This paper proposes routing protocol for forwarding and error recovery during packet loss. The same is achieved by energy and hops distance-based formulation of the routing mechanism. The reachability of the intermediate node to the source node is the major factor that helps in improving the lifetime of the network. On the other hand, intelligent hop selection increases the reliability over continuous data transmission. The number of hop count is factor of hop weight and available energy of the node. The comparison over the previous state of the art using QualNet-7.4 network simulator shows the effectiveness of proposed work in terms of overall energy conservation of network and reliable data delivery. The simulation results also show the elimination of blind forwarding and data inaccessibility.

• 보건의료산업학회지
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• 제3권2호
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• pp.55-64
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• 2009

The purpose of this study was to examine the use of skincare & obesity clinics, customer satisfaction with franchise and non-franchise skincare & obesity clinics and customer selection criteria in the region of Busan in a bid to suggest some of the right directions for marketing strategies for the inauguration of skincare & obesity clinics. The subjects in this study were 240 users of 16 different skincare & obesity clinics selected from Busan. Out of the clinics, four franchise clinics and four non-franchise clinics were selected from the major commercial districts, and four franchise clinics and four non-franchise clinics were selected from the residential areas. Concerning the influence of three leading factors on customer satisfaction, all the service price, material service and human service had a significant impact on customer satisfaction in the franchise model for the commercial districts. In the case of the franchise clinics in the residential areas, only service price exerted a significant influence on customer satisfaction. In terms of the non-franchise model for the commercial districts, customer satisfaction was under the significant influence of human service and material service, and that was significantly affected by human service and service price in the non-franchise model for the residential areas.

• 공학교육연구
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• 제24권3호
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• pp.21-31
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• 2021

Flipped learning, which involves listening to lectures at home and performing dynamic group-based problem-solving activities in the classroom, is recently evaluated as a learner-centered teaching method, and interest and applications in engineering education are increasing. Therefore, this study aims to provide practical guidelines for successful application through empirical research analysis on the use of flipped learning in domestic engineering education. Through the selection criteria and keyword search, a systematic review of 36 articles was conducted. As a result of the analysis, flipped learning research in engineering education has increased sharply since 2016, focusing on academic journals and reporting its application cases and effects. Most of the research supported that flipped learning was effective not only for learners' learning activities(e.g., academic achievement, satisfaction, engagement, learning-flow, interaction), but also for individualized learning and securing sufficient practice time. It was often used in major classes with 15 to less than 50 students, especially in computer-related major courses. Most of them consisted of watching lecture videos, active learning activities, and lectures by instructors, and showed differences in management strategies for each class type. Based on the analysis results, suggestions for effective flipped learning management in future engineering education were presented.

• 식품보건융합연구
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• 제10권4호
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• pp.9-19
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• 2024

This qualitative study explores the impact of online food delivery platform attributes on customer satisfaction and repurchase intentions. Employing a phenomenological approach, we conducted in-depth interviews and focus group discussions with 15 participants to gain rich insights into user experiences. Thematic analysis revealed key factors influencing satisfaction and loyalty: service quality dimensions (efficiency, reliability, fulfillment, privacy), expectation disconfirmation, perceived usefulness and ease of use, multi-level customer value, relationship quality, electronic word-of-mouth, value co-creation, and phased loyalty formation. Our findings extend customer behavior theory in digital platforms, offering a comprehensive framework for understanding the complex mechanisms underlying user satisfaction and repurchase decisions. The study provides valuable implications for platform operators, highlighting the importance of exceeding customer expectations, enhancing user experience, building trust, leveraging user-generated content, and fostering co-creation processes. Methodologically, we demonstrate the efficacy of qualitative approaches in uncovering nuanced insights in digital service contexts. While acknowledging limitations in generalizability, this research establishes a solid foundation for future investigations into the rapidly evolving domain of online food delivery services. The integrated theoretical approach offers a robust model for analyzing customer behavior in emerging digital service environments, contributing significantly to both academic understanding and practical application in the field of digital service provision and platform management.