• 한국시뮬레이션학회논문지
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• 제14권1호
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• pp.33-42
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• 2005

Service Level Agreement (SLA) is a service providing scheme by a service class agreement between a user and a service provider SLA allows that a user can select an expected service class in various service classes provided from a service provider. Recently, SLA management is adapted to support the end-to-end Qos for service users in Beyond 3 Generation (B3G) networks. In B3G networks, SLA provides multiple service classes on access networks so that service classes should be managed to assure the service satisfaction for users. In this paper, we propose a dynamic Qos management scheme by IP traffic class controlling based on SLA in B3G networks. Also, to manage dynamic traffic service, we consider Differentiated services (Diffserv) mechanism for the resource management by SLA. An If service traffic class on SLA can be dynamically changed by Diffserv traffic management to support dynamic end-to-end Qos. Hence, in this paper, we consider the buffer threshold scheme for controlling traffic loads and the traffic level control scheme for implementing the dynamic traffic management by the SLA.

• 한국융합학회논문지
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• 제13권1호
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• pp.179-188
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• 2022

본 연구는 B급 감성 광고에 대한 전반적인 특성을 파악하고 경향을 분석하는 것을 목적으로 하였다. 이를 위해 국내 최대 광고 포털 사이트인 TVCF(www.tvcf.co.kr)에 탑재된 광고들 중 2015년부터 2020년까지 온에어된 498편의 광고들을 추출하여 내용분석 방법을 통해 분석하였다. 분석결과, B급 감성 광고는 다양한 장르에서 활용되고 있으나 특히, 유머/과장 장르에서 가장 많이 활용되어왔고 2020년 Corona-19 Pandemic으로 인해 점차 증가하는 추세를 나타내고 있음을 알 수 있었다. 또한 상업광고가 아닌 비상업광고 영역인 관공서나 단체, 공익광고, 기업 PR 등의 영역에서 과거에 비해 B급 감성 광고 활용률이 증가되었음을 확인하였다. 이러한 결과는 B급 감성 광고는 이제 더 이상 단순히 '하위문화(subculture)'로부터 기인 된 '비주류' 문화의 표상이 아닌 사회적·문화적·경제적 현상뿐 만이 아니라 개인의 우울감, 피로감 그리고 상실감의 증폭 문제 등까지 '희화(漫畫)화'를 통해 완화시켜주는 '새롭고 도전적인 주류문화'의 표상으로서 산업/비산업군의 모든 영역까지도 널리 활용되고 있는 중추적 역할을 하고 있다는 사실에 주목할 필요가 있음을 시사한다.

• 한국환경과학회지
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• 제20권5호
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• pp.611-621
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• 2011

This study aims to find out an effect of 3 types of environment worksheets used for 5th elementary graders's environmental class on their environmental perceptions and behavior. 104 of 5th graders in M elementary school in Ulsan Metropolitan City were selected and divided into A group(35), B group(34) and C group(35) for this study, and to A group, a class used worksheet of the photo taken clean, unpolluted environment, and to B group, a class used worksheet of the photo taken polluted environment and to C group, a class used worksheet of only text without photo were carried out. The worksheet used class was conducted 5 times, and then after the classes, the student's change in environmental perceptions and behavior by group was put into verification Below are the study results. First, the worksheets used for the environment class have incurred significant differences in student's environmental perceptions by their types. A. B groups were higher than C group in their post-test environmental perceptions score, a statistically significant differences. Meanwhile, statistically insignificant differences appeared in environmental perceptions score between A and B groups. Second, the type of worksheet used for environment class represented considerable differences in he students' environmental behavior. A group was higher than B. C groups in post test environment behavior score, the difference of which was statistically significant. While statistically insignificant difference represented in environmental behavior between B, C groups. Third, the both types of worksheets of the photo of positive environment and that of negative environment appeared to be effective statistically in changing the elementary students' environmental behavior, while the worksheets of the photo of positive environment appeared to be effective statistically in their environmental behavior.

• 영재교육연구
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• 제20권1호
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• pp.317-346
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• 2010

본 연구는 초등학교 과학영재수업을 담당하는 교사들의 과학 영재수업 및 영재아에 대한 인식 변화와 교사들의 실제 수업 및 동료교사 간의 대화를 통해 실천적 지식의 변화과정을 알아보는 것을 목적으로 하고 있다. 연구대상으로 수업개선을 희망하는 초등교사 2명(A와 B교사)을 선정하였고, 그 교사들은 수업 및 수업대화를 통해 수업에 대한 자기성찰과정을 경험하였다. 교직경력 10년차인 A교사는 학부 때부터 영재아 관찰을 통해 영재를 접해왔고 평소에도 영재나 과학수업에 관심을 많이 갖고 있어 대학원에 진학하였다. 그에 비해 B교사는 교직경력이 3년차이며 대학원에 진학한 이후 영재아를 접해 본 교사이다. 본 연구의 결과는 다음과 같다. 좋은 수업에 대한 확고한 신념과 영재에 관한 지식이 선행되어 있는 A교사는 자신의 실제 교실 수업 경험으로부터 반성적 성찰을 통해 영재수업에 대한 실천적 지식이 발달되는 것을 알 수 있었다. 또한 수업관찰과 동료교사와의 수업대화를 통해 고민한 부분에 대하여는 교수방법을 변경하거나 교과내용지식을 보강하는 등 실천적 지식이 다음 수업에 실제적으로 반영되어 나타났다. 그러나 영재에 관한 지식이 선행되지 않은 B교사는 자신의 수업성찰이나 수업 경험이라기보다는 동료교사와의 대화를 통해 실천적 지식의 발달이 이루어졌으며 형성된 실천적 지식을 다음 수업에 반영하는데 다소 어려움을 겪는 듯하였다. 이러한 결과로부터 교사가 가지고 있는 신념, 가치관, 경험, 지식 등에 따라 실천적 지식의 변화과정이나 형성과정이 다르다는 것을 알 수 있다. 수업, 수업관찰, 동료교사와의 수업대화를 통한 자기 수업에 대한 성찰은 초등영재 담당교사가 실천적 지식을 형성하여 수업전문성을 향상시키기에 좋은 방법이 되므로 영재 교사교육 프로그램에서 모의수업, 자기수업반성, 수업대화를 통해 수업에 대한 실천적 지식을 형성할 수 있는 기회를 제공하는 데 활용될 수 있을 것이다.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2008년도 추계학술대회
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• pp.78-81
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• 2008

The purpose of this research is to verify whether presentation order has an effect on the evaluation of products. In the empirical study, three types of humidifier and those of toaster were used. These products have 6 different sets of combination (3! = 3${\times}$2${\times}$1), and each set was evaluated by 15 subjects who were provided with two sets of images from humidifier and toaster in empirical study (N=90). Subjects completed measures assessing the five aspects: attractiveness, convenience, hygiene, efficiency and durability of the product. Each of the dependent measures was assessed on Likert-scale ranging 1 to 7. The ratings to the five aspects were added individually. Three types of humidifier and those of toaster were divided into 3 classes in terms of 'class A' which consists of the highest rated product, 'class C' which consists of the lowest rated product, and 'class B' which consists of the rest. Two main findings were discovered: First, the presentation order of both class A and class C influences the product evaluation whereas that of class B does not. As class A was presented as the last one, the subjects evaluated it the most positive. In the case of class C, on the contrary, when it is presented as the first is the best for itself; Secondly, the result shows that presented C-B-A sequence combination has a greater effect on entire evaluation than all other conditions in this study.

• 대한수학회보
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• 제39권1호
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• pp.123-131
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• 2002

Let A(p, k) (p, k$\in$N) be the class of functions f(z) = $z^{p}$ + $a_{p+k}$ $z^{p+k}$+… analytic in the unit disk. We introduce a subclass H(p, k, λ, $\delta$, A, B) of A(p, k) by using the Ruscheweyh derivative. The object of the present paper is to show some properties of functions in the class H(p, k, λ, $\delta$, A, B). B).

• Journal of applied mathematics & informatics
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• 제39권3_4호
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• pp.529-539
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• 2021

The purpose of this paper is to prove some fixed point theorems using (𝜓, 𝜑)-contractions via the concept of C-class functions in G_b-metric spaces. Moreover, an example is presented to illustrate the validity of our results.

• Kyungpook Mathematical Journal
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• 제19권2호
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• pp.205-211
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• 1979

In this paper we continue the study of formation radical (F-radical) classes initiated in [3]. Hereditary and stronger properties of F-radical classes are discussed by giving construction for lower hereditary, lower stronger and lower strongly hereditary F-radical classes containing a given class M. It is shown that the Baer F-radical B is the lower strongly hereditary F-radical class containing the class of all nilpotent ideals and it is the upper radical class with $\{(I,\;N){\mid}N{\in}C,\;N\;is\;prime\}{\subset}SB$ where SB denotes the semisimple F-radical class of B and C is an arbitrary but fixed class of homomorphically closed near-rings. The existence of a largest F-radical class contained in a given class is examined using the concept of complementary F-radical introduced by Scott [5].

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제52권3호
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• pp.133-139
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• 2003

In this paper, a new control scheme of Class-E inverter for Induction Heating (IH) Jar applications with clamped voltage characteristics using Pulse-Frequency-Modulation (PFM) is introduced. To reduce the voltage stress of switch, the proposed PFM control scheme doesn't need any auxiliary circuit in comparison to a family of Active Clamped Class-E (ACCE) inverter. It can decrease voltage stress of switch through modulation of switching frequency. The Class-E inverter using the proposed control scheme has the advantage of not only the same output power when it is compared with a Hybrid-Active Clamped Class-E (Hybrid-ACCE) inverter but also Zero-Voltage-Switching (ZVS), which are characteristics of conventional Class-E and ACCE inverter. The control principles and analysis of proposed method are explained in detail and its validity is verified through simulation and experimental results.

• 대한수학회논문집
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• 제36권4호
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• pp.685-704
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• 2021

The purpose of this paper is to establish a very general Cameron-Storvick theorem involving the generalized analytic Feynman integral of functionals on the product function space C²_a,b[0, T]. The function space C_a,b[0, T] can be induced by the generalized Brownian motion process associated with continuous functions a and b. To do this we first introduce the class ${\mathcal{F}}^{a,b}_{A_1,A_2}$ of functionals on C²_a,b[0, T] which is a generalization of the Kallianpur and Bromley Fresnel class ${\mathcal{F}}_{A_1,A_2}$. We then proceed to establish a Cameron-Storvick theorem on the product function space C²_a,b[0, T]. Finally we use our Cameron-Storvick theorem to obtain several meaningful results and examples.