김수영 교수

Reminiscent of Russian Matrioshka dolls, tetraazamacrocycles (1,4,7,10-tetraazacyclododecane (cyclen) and 1 , 4 , 8 , 11 - tetraazacyclotetradecane (cyclam)) and their transition metal complexes are encapsulated in the cavity of cucurbit[8]uril (CB[8]). The X-ray crystal structure of the [Cu(cyclen)] in CB[8] complex (see picture; copper: green, oxygen: red, nitrogen: blue, carbon: gray) reveals a five-coordinate CuII center in a square-pyramidal environment with a water molecule bound to the ax

By taking advantage of the fact that cucurbit[6]uril (CB[6]) forms exceptionally stable host-guest complexes with protonated amines, and that its homologue CB[8] can encapsulate a pair of electron-rich and electron-deficient guest molecules to form a stable 1:1:1 complex, we synthesized a novel dendritic [10]pseudorotaxane, or second-generation rotaxane dendrimer (from a topological point of view), in which 13 molecular components are held together by noncovalent interactions. A triply branched

Abstract In this paper, an approach is proposed for scheduling stepper machines that are acting as bottleneck machines in the semiconductor wafer fabrication process. We consider the problem of scheduling the steppers for an 8 hour shift, determining which types of wafer lots to work on each machine. The scheduling objective is to find the optimal stepper allocations such that the schedule meets target production quantities that have been derived from the given target Work-In-Process (WIP) level

Fast wie Matrjoschka-Puppen werden 1,4,7,10-Tetraazacyclododecan (Cyclen) und 1,4,8,11-Tetraazacyclotetradecan (Cyclam) sowie ihre Übergangsmetallkomplexe im Hohlraum von Cucurbit[8]uril (CB[8]) eingeschlossen. Die Röntgenstrukturanalyse von [Cu(cyclen)] im CB[8]-Komplex (siehe Bild; Kupfer: grün, Sauerstoff: rot, Stickstoff: blau, Kohlenstoff: grau) ergab, dass ein quadratisch-pyramidal fünffach koordiniertes CuII-Zentrum vorliegt, wobei ein Wassermolekül die axiale Position besetzt.

Multimedia broadcast and multicast services have started to outpace simple data unicast services. A hybrid satellite-terrestrial network can provide a cooperative system in such a way as to provide high-quality seamless MBMS effectively. In this article we discuss two promising techniques that can improve the performance of a mobile satellite broadcasting system with HSTN. The objective of the first technique is to obtain diversity gain from independent signal paths; this can be achieved by usin

Abstract In this study, we propose an efficient cooperative diversity scheme for mobile satellite multimedia broadcasting systems. The proposed scheme is a transmit diversity technique for adapting different channel environments, and thus, no channel quality information from the return link is needed. In the proposed scheme, we utilize space–time block codes and rate‐compatible turbo codes to achieve diversity gains and additional coding gains, respectively. The satellite and several repeaters o

We propose a heuristic procedure for planning and scheduling multiple projects subject to limited resource availabilities. We depart from previous research in that explicit lateness costs for each project are considered. Our procedure involves aggregate analysis using linear programming to determine target resource loading profiles for each project that optimize trade-offs of lateness costs among projects, followed by detailed multi-project scheduling consistent with the target profiles. Target

This paper proposes an efficient heuristic algorithm to solve the problem of allocating the buffers in a production line for given total buffer capacity and the minimum required throughput. While the traditional research has focused on the problem of allocating the buffer capacity to maximize the throughput, the objective of minimizing the average Work-In-Process (WIP) is considered. Minimization of the WIP in the production line has drawn much attention in many practical applications, due to th

본 연구는 복지와 노동의 통합을 지향해온 근로연계복지의 문제점들을 사회복지와 노동시장의 충돌이라는 관점에서 종합적으로 재조명한다. 특히 본 연구는 자활사업의 사례를 중심으로, 근로연계복지에 내재한 사회복지와 노동시장 사이의 딜레마를 ① 사업의 목표(복지사업과 영리사업 사이의 딜레마); ② 급여의 성격(복지혜택과 노동임금 사이의 딜레마); ③ 정책의 대상(집단과 개인 사이의 딜레마); ④ 실무자의 역할(사회복지종사자와 사업경영자 사이의 딜레마)라는 네 차원에서 살펴본다. 이를 통해 지금까지 행정적‧제도적 차원에서 논의되어왔던 자활사업의 문제들이 사실 서로 상충하는 체계인 사회복지와 노동시장의 작동원리를 사회공학적으로 결합시키려 하면서 발생한 필연적 부작용이라는 점을 지적하고자 한다. 따라서 자활사업의 여러 문제점들을 해결하기 위해서는 제도적 개편방안만이 아니라, 근로연계복지의 작동원리에 대한 보다 본질적인 성찰이 요구된다는 점을 강조하고자 한다.