• Spatial Information Research
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• 제17권4호
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• pp.417-430
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• 2009

본 연구에서는 유시티의 U-서비스와 도시경쟁력 평가지표의 상호 연관성을 찾고 있다. 연구결과 U-서비스가 빈도에 차이를 보이지만 6개의 도시유형별로 도시경쟁력 강화 수단으로 활용되고 있다. 특히 안전 건강, 활력(경제)도시형에서 적절한 U-서비스 활용은 도시경쟁력 강화에 기여할 수 있는 빈도가 높다. 다음으로 도시경쟁력 평가항목 중 공동항목과 문화도시형에서는 U-서비스가 도시경쟁력 강화에 상대적 기여도가 낮다. 이는 도시의 정책을 평가하는 항목으로 구성되어 있는 공동항목이 도시의 물리적 시설 지능화를 통해 U-서비스를 구현하는 유시티 성격에 부합되지 않는 것이다. 반면 문화도시형과 관련된 U-서비스는 상대적으로 서비스개발이 미약하기 때문이다. 본 연구를 통해 U-서비스는 도시 경쟁력 강화에 활용될 수 있음을 확인할 수 있었다.

• 대한수학회지
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• 제60권3호
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• pp.565-586
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• 2023

We study the Dirichlet problem for the degenerate nonlocal parabolic equation u_t - a(||∇u||²_L²(Ω))∆u = C_b ||u||^β_L²(Ω) |u|^q(x,t)-2 u log |u| + f in Q_T, where Q_T := Ω × (0, T), T > 0, Ω ⊂ ℝ^N, N ≥ 2, is a bounded domain with a sufficiently smooth boundary, q(x, t) is a measurable function in Q_T with values in an interval [q^-, q⁺] ⊂ (1, ∞) and the diffusion coefficient a(·) is a continuous function defined on ℝ₊. It is assumed that a(s) → 0 or a(s) → ∞ as s → 0⁺, therefore the equation degenerates or becomes singular as ||∇u(t)||2 → 0. For both cases, we show that under appropriate conditions on a, β, q, f the problem has a global in time strong solution which possesses the following global regularity property: ∆u ∈ L²(Q_T) and a(||∇u||²_L²(Ω))∆u ∈ L²(Q_T ).

• 디지털산업정보학회논문지
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• 제8권4호
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• pp.53-62
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• 2012

U-City means the high-tech city that applied ubiquitous technology and information communication technology. U-City aims to intensify urban competitiveness and to improve the quality of residents' life through efficient management of the urban. Currently, 77 U-City projects is underway. The each project cost and scale estimate is not clear in the absence of the U-Service Standardization Model. So, many of the project are trouble about making a production the proper number of U-Service or the cost of project. The excessive service construction is reflected on the construction costs, which leads to the rise of sales price and passes onto the executor of a project as a burden of the project costs, and the problem of the delay of the change-over occurs due to supporting the operation costs for the operation of the constructed service and the demand for additional installation of facilities between a local autonomous entity and the executor of a project. In this paper, we suggested the U-Services Construction Standardization Methods and proposed the standardization services guideline of crime prevention services. U-City services in the future are able to maintain the consistency of the system through the utilization of the proposed standard model. As a result, the U-City project's pre-estimated cost and scale can be extracted.

• 대한전자공학회논문지TC
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• 제40권11호
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• pp.85-92
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• 2003

본 논문에서는 5㎓ 대역에서 동작하는 다중 V-슬롯 모양의 마이크로스트립 안테나를 설계하고 제작하였다. 단일 U-슬롯 모양 위에 두 개의 작은 역 U-슬롯 모양을 갖도록 하였으며 접지면과 기판사이에 공기층을 삽입하여 충분한 대역을 얻고자 하였다. 여러 파라메타, 큰 U 슬롯모양 가로 길이, 세로 길이, 너비, 위치 그리고 두 개의 역 U 슬롯 모양 간격, 급전 위치 그리고 공기갭의 두께를 최적화시킨 후에 다중 U-슬롯 모양의 마이크로스트립 안테나가 제작되었으며 제작된 안테나의 측정결과는 다음과 같다. VSWR<2.0에서 20.4%의 대역폭과 5.5㏈i의 이득과 방사패턴을 얻었다.

• Journal of applied mathematics & informatics
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• 제34권3_4호
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• pp.269-284
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• 2016

In this paper, we firstly use Krasnosel'skii fixed point theorem to investigate positive solutions for the following three-point boundary value problems for p-Laplacian with a parameter $({\phi}_P(D^{\alpha}_{0}+u(t)))^{\prime}+{\lambda}f(t, u(t))=0$, 0$D^{\alpha}_{0}+u(0)=u(0)=u{\prime}{\prime}(0)=0$, $u^{\prime}(1)={\gamma}u^{\prime}(\eta)$ where ϕ_p(s) = |s|^p−2s, p > 1, $D^{\alpha}_{0^+}$ is the Caputo's derivative, α ∈ (2, 3], η, γ ∈ (0, 1), λ > 0 is a parameter. Then we use Leggett-Williams fixed point theorem to study the existence of three positive solutions for the fractional boundary value problem $({\phi}_P(D^{\alpha}_{0}+u(t)))^{\prime}+f(t, u(t))=0$, 0$D^{\alpha}_{0}+u(0)=u(0)=u{\prime}{\prime}(0)=0$, $u^{\prime}(1)={\gamma}u^{\prime}(\eta)$ where ϕ_p(s) = |s|^p−2s, p > 1, $D^{\alpha}_{0^+}$ is the Caputo's derivative, α ∈ (2, 3], η, γ ∈ (0, 1).

• 한국주거학회논문집
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• 제23권5호
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• pp.51-60
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• 2012

Large-scale urban developments with increasing population and expansion of industrial facilities have destroyed the ecosystem. Consequently, the importance of vertical farm as a form of urban agriculture is increasing. However, such problems of vertical farms as economy and lack of awareness of residents are being raised. Firstly, this study derived types of vertical farm that are applicable to residential spaces through an examination of vertical farm buildings, and then inferred assessment items for a questionnaire survey for the development of u-services. Secondly, based on the issues deduced from the survey, u-services needed in vertical farm buildings were derived to use them as the basic data when we plan for a ubiquitous vertical farm building in residential space in the future. As result, the following uservices of ubiquitous vertical farm were proposed: u-notification service about the condition of crops from the aspect of growth management based on ubiquitous technology, remote/automatic control u-services, harvest information u-service for harvest management, recipe information u-service, and indoor air quality monitoring u-service, indoor environment adjusting u-service, and farm environment control u-service. Considering that many new buildings in Korea are residential buildings and many high-rise buildings are being planned, studies on vertical farm buildings must be continued.

• 한국독어학회지:독어학
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• 제3집
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• pp.253-276
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• 2001

In dieser vorliegenden Arbeit wird. versucht, sprachlicher Ausdrucke der $\"{U}berzeugtheit-Modalit\"{a}t$ in den Lehrblichern $f\"{u}r$ Deutsch als Fremdsprache unter dem Aspekt der Pragmatik zu analysieren. Als Untersuchungsmaterial werden zwei $Lehrb\"{u}cher\;gew\"{a}hlt$, die in einem Deutschunterricht an der Hankuk $Universit\"{a}t\;f\"{u}r$ Fremdsprachen benutzt worden ist oder benutzt wird: Deutsche Sprachlehre $f\"{u}r\;Ausl\"{a}nder$(kurz: DSA) und Aufbaukurs Deutsch (kurz: AD). Das erstere gilt als grammatikbezogen, das zweite als kommunikationsorientiert. In AD kommen dialogische und monologische Texte im $Verh\"{a}ltnis$ 5 zu 3 vor, wahrend in DSA monologische Texte $70\%$ aller Texte betragen. Es ist zu beachten, dass DSA relativ mehr asymmetrische Dialoge enthalt, in denen ein $Gesp\"{a}chsteilnehmer$ auf Kenntnisse, $F\"{a}higkeiten$ oder Hilfe eines anderen angewiesen ist. Jeder $Gesp\"{a}chsteilnehmer\;\"{u}bemimmt$ eine konventionell festgelegte Rolle. Asymmetrische Dialogen sind in der Regel standardisierte Dialogformen wie Wegauskunft oder Verkaufsgesprach. Im Vergleich zu DSA sind 25 von 29 Dialogen in AD symmetrisch. Der symmetrische Dialog ist ein Dialog, dessen Teilnehmer sich in 'gleichberechtigter' Position befinden. In symmetrischen Dialogen versucht z.B. ein $Gesp\"{a}chsteilnehmer$ einen anderen zu $\"{u}berzeugen$, um seine eigenen Interessen durchzusetzen oder zwei (oder mehrere)$Gesp\"{a}chsteilnehmer\;bem\"{u}hen$ sich zusammen, urn ein gemeinsames Ziel zu erreichen. Bei der empirischen Untersuchung von DSA und AD $l\"{a}sst$ sich feststellen, dass modale sprachliche Mittel, die zum Ausdruck der $\"{U}berzeugtheit\;dienen,\;h\"{a}ufig$in symmetrischen Dialogen vorkommen. Ein solcher Ausdruck stellt em kommunikativ relevantes Element spraehlieher Handlung dar. Bei der $\"{U}berzeugtheit-Modalit\"{a}t$ handelt es sich $n\"{a}mlich$ um den Grad der $\"{U}berzeugtheit$ des Spreehers, also um die sprecherseitige $Einsch\"{a}tzung$ des Geltungsgrad des Inhaltes einer spraehliehen $\"{A}u{\ss}erung$ in ihrer Beziehung zur objektiven Realitat. In einer sprachliehen $\"{A}u{\ss}erung\;dr\"{u}ckt$ man seine Gewissheit, Ungewissheit, Vermutung, seinen Zweifel aus. Aus der Analyse dialogiseher Texte ergibt sich, dass sprachliche Ausdrucke der $\"{U}berzeugtheit-Modalit\"{a}t$ in AD viel $h\"{a}ufiger\;und\;vielf\"{a}ltiger$ vorkommen, als in DSA.

• 컴퓨터교육학회논문지
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• 제9권6호
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• pp.53-64
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• 2006

본 연구에서는 u-러닝을 위한 콘텐츠 개발의 방향을 제시하고자 u-러닝 콘텐츠 개발 지침을 마련하였다. 이를 위해 먼저 선행 연구에서 밝혀진 유비쿼터스 컴퓨팅의 특징과 u-러닝의 성격을 탐색하고 이를 토대로 5개 부문 17개 항목의 u-러닝 콘텐츠 개발 지침을 추출하였다. 그리고 추출된 개발 지침의 내용 타당성과 신뢰성을 검증하기 위하여 이 분야의 전문가 및 실무자에게 설문 조사를 실시하였다. 그 결과 본 연구에서 제시한 u-러닝 콘텐츠 개발 지침은 내용 타당성과 신뢰성을 모두 갖추고 있는 것으로 나타났다. 본 연구에서 제시한 개발 지침은 곧 확산될 u-러닝을 효과적으로 준비할 수 있는 콘텐츠 개발의 이정표가 되어 준 것으로 기대한다. 또한 미래의 기술 발달을 예견하고 이에 적합한 콘텐츠 개발의 방향을 미리 제시함으로써 기술 발달과 변화에도 지속적으로 활용될 수 있는 효과적인 콘텐츠 제작에 기여한 것이다.

• 대한가정학회지
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• 제19권4호
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• pp.65-71
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• 1981

Es wird hier versucht, die doch sehr subjektive $gepr\"{a}gte$ Gestalt des Familienhaushalts mit wissenschaftlichen Methoden an objektiven Kriterien darzustellen. Alle wirtschaftlich relevanten Handlungen entspringen $Bed\"{u}rfnissen$. $Bed\"{u}rfnissen$ bestimmen immer den Zweck der Handlung. Nach dem $\"{o}konomischen$ Prinzip geht es dabei um die $bestm\"{o}gliche$ Verwendung knapper Mittle $f\"{u}r$ bestimmte, den $Bed\"{u}rfnissen$ entsprechende Zwecksetzungen. $Haush\"{a}lterischen$ Handeln aber geht $\"{u}ber$ das $\"{o}konomische$ Prinzip hinaus. Im $haush\"{a}lterichen$ Handeln geht es auch um die rationale Kontrolle der $Bed\"{u}rfnisse$. Hier ist der Masstab die den $Bed\"{u}rfnissen$ vorausgehende und die der $Bed\"{u}rfnisbefriedigung$ nachfolgende Lebensnot. Ein $vern\"{u}nftiges$ $haush\"{a}lterisches$ Handeln mu${\beta}$ deshalb zwei Kriterien $erf\"{u}llen$: 1. Knappe Mittel $m\"{u}ssen$ den $h\"{o}chsten$ Nutzen bringen. 2. Der Nutzeffekt mu${\beta}$ die $pers\"{o}nliche$, menschliche Lebensot optimal abzuwenden. An Hand dieser beidenparameter kann das $haush\"{a}lterische$ Handeln objektiv und mit wiss-enschaftlichen Methoden $\"{u}berpr\"{u}ft$, beurteilt und korrigiert werden.

• 대한수학회보
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• 제52권3호
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• pp.1007-1025
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• 2015

Let $\mathbb{N}_0$ be the set of non-negative integers, and let P(n, l) denote the set of all weak compositions of n with l parts, i.e., $P(n,l)=\{(x_1,x_2,{\cdots},x_l){\in}\mathbb{N}^l_0\;:\;x_1+x_2+{\cdots}+x_l=n\}$. For any element $u=(u_1,u_2,{\cdots},u_l){\in}P(n,l)$, denote its ith-coordinate by u(i), i.e., $u(i)=u_i$. A family $A{\subseteq}P(n,l)$ is said to be t-intersecting if ${\mid}\{i:u(i)=v(i)\}{\mid}{\geq}t$ for all $u,v{\epsilon}A$. A family $A{\subseteq}P(n,l)$ is said to be trivially t-intersecting if there is a t-set T of $[l]=\{1,2,{\cdots},l\}$ and elements $y_s{\in}\mathbb{N}_0(s{\in}T)$ such that $A=\{u{\in}P(n,l):u(j)=yj\;for\;all\;j{\in}T\}$. We prove that given any positive integers l, t with $l{\geq}2t+3$, there exists a constant $n_0(l,t)$ depending only on l and t, such that for all $n{\geq}n_0(l,t)$, if $A{\subseteq}P(n,l)$ is non-trivially t-intersecting, then $${\mid}A{\mid}{\leq}(^{n+l-t-l}_{l-t-1})-(^{n-1}_{l-t-1})+t$$. Moreover, equality holds if and only if there is a t-set T of [l] such that $$A=\bigcup_{s{\in}[l]{\backslash}T}\;A_s{\cup}\{q_i:i{\in}T\}$$, where $$A_s=\{u{\in}P(n,l):u(j)=0\;for\;all\;j{\in}T\;and\;u(s)=0\}$$ and $$q_i{\in}P(n,l)\;with\;q_i(j)=0\;fo\;all\;j{\in}[l]{\backslash}\{i\}\;and\;q_i(i)=n$$.