• Korean Journal of Mathematics
• /
• 제23권1호
• /
• pp.115-128
• /
• 2015

Plumbing surfaces of links were introduced to study the geometry of the complement of the links. A basket surface is one of these plumbing surfaces and it can be presented by two sequential presentations, the first sequence is the flat plumbing basket code found by Furihata, Hirasawa and Kobayashi and the second sequence presents the number of the full twists for each of annuli. The minimum number of plumbings to obtain a basket surface of a knot is defined to be the basket number of the given knot. In present article, we first find a classification theorem about the basket number of knots. We use these sequential presentations and the classification theorem to find the basket number of all prime knots whose crossing number is 7 or less except two knots $7_1$ and $7_5$.

• Korean Journal of Mathematics
• /
• 제22권2호
• /
• pp.253-264
• /
• 2014

Flat plumbing basket surfaces of links were introduced to study the geometry of the complement of the links. In present article, we study links of the flat plumbing basket numbers 4 or less using a special presentation of the flat plumbing basket surfaces. We find a complete classification theorem of links of the flat plumbing basket numbers 4 or less.

• East Asian mathematical journal
• /
• 제32권1호
• /
• pp.85-91
• /
• 2016

In present article, we find a complete classification theorem of links of basket numbers 2 or less. As an application, we study the basket numbers of links of 6 crossings or less.

• 한국가시화정보학회:학술대회논문집
• /
• 한국가시화정보학회 2004년도 추계학술대회 논문집
• /
• pp.56-59
• /
• 2004

An experimental study has performed to identify the mixing characteristics of basket mill by using PIV and LIF techniques. The velocity fields were measured at three sectors for each two types of basket mill model and various impeller speed. To verify the results of velocity field measurement and the concentration field, LIF measurement also was performed for three cases. There was an inactive region and a descending flow to the bottom of basket mill at the original model. But when the impeller type and the guide shape were changed, internal flow structure was improved suitably for mixing and dispersion. The improvement result in increment of inflow flow rate at the basket entrance about $10\%$.

• 방사성폐기물학회지
• /
• 제10권2호
• /
• pp.105-115
• /
• 2012

월성원자력본부의 조밀건식저장시설인 MACSTOR/KN-400의 인허가 과정에서 사고조건에 대한 바스켓의 안전성 평가를 위한 실증시험의 필요성이 제기되었다. 실증시험을 위한 낙하시험시설을 한국원자력연구원에 설치하고 바스켓 낙하 실증시험을 수행하였다. 실증시험 결과 실린더 내 적재 바스켓의 상부 용접부가 낙하 바스켓과 충돌하여 파손되고 누설이 발생하였다. 기존 바스켓이 실증시험에서 누설율 성능요건을 만족하지 못함에 따라 바스켓의 설계 개선안 도출이 필요하게 되었다. 설계 개선을 위한 방향을 선정하고 이에 기초하여 6 종류의 설계 개선안을 도출하였다. 개별 설계 개선안에 대하여 구조해석 및 시편시험을 수행하였다. 구조해석 및 시편시험의 결과를 바탕으로 최종설계안을 확정하였다. 최종설계안은 바스켓의 중앙 포스트의 높이를 감소하여 낙하 바스켓과의 충돌속도를 감소시키는 설계안이었다. 최종설계안에 대한 시험모델을 제작하여 낙하실증시험을 재수행한 결과 모든 성능요건을 만족하였다.

• 한국임상수의학회지
• /
• 제9권2호
• /
• pp.367-372
• /
• 1992

To investigate the effect of neck collars for the protection of self-mutilation, attainable sites of the body in dogs with collars and durability of collars were examined for 7 days. The collars used in the present experiment were hand made plastic basket collar, IASIS$\^$R/ ( heat moldable plastics), commerical plastic and cardboard collars The hand made plastic basket collar was made of basket which could buy at any supermarkets. The dogs with hand made plastic basket collar and IASIS$\^$R/ which was cast from the neck to the scapular region could lick only on digits of the forelimb. However, the dogs with commercial plastic and cardboard collars could lick not only the digits of forelimb but femur and digits of the hindlimb. It was suggested that hand made plastic basket collar was superior to the other collars in easiness of putting, durability, protection of self mutilation and economy.

• 한국의류학회지
• /
• 제21권7호
• /
• pp.1196-1204
• /
• 1997

Cotton, rayon/cotton, and Tencel twill weave fabrics were used to investigate the effect of fiber types on the cellulase washing finish. And twill. basket, and derivative weave cotton fabrics were used to study the weave effect. Various fabrics were treated with neutral cellulase varying treatment times and with acid cellulase, stone, and stone-neutral cellulase respectively for two hours in a rotary washer. Weight loss decreased in the order of rayon/cotton> cotton> Tencel, and basket and derivative weave fabrics lost more weight than twill weave fabric. Color difference decreased in the order of cotton> Tencel> rayon/cotton, and twill weave fabric had larger color difference than derivative and basket weave fabrics. Back staining decreased in the order of cotton> rayon/cotton> Tencel, and twill weave fabric had larger back staining than derivative and basket weave fabrics. Tear strength retention decreased in the order of rayon/cotton> cotton> Tencet and twill weave fabric had larger tear strength retention than derivative and basket weave fabrics. Flex stiffness retention decreased in the order of cotton> Tencel> rayon/cotton, and in the order of derivative> twill> basket weave. In cotton fibers, damage of primary wall was observed. And the cellulase treatment on Tencel seemed to roughen the fabric surface slightly, and to fibril fibers along the fiber axis.

• 소성∙가공
• /
• 제32권4호
• /
• pp.199-207
• /
• 2023

The stainless steel basket-bowl, a critical component of washing machines, is characterized by its unique two-tiered circular shape. This study explores the potential of a draw-bead free die design to address tearing concerns in the prospective plastic layer during the drawing operation. In order to prevent wrinkles that may arise from the absence of a draw-bead, a two-stage punch configuration is proposed. The influence of the blank holder force on wrinkle reduction is also examined. Finite element analysis is employed to evaluate the proposed die design by analyzing the wrinkle shape and strain mode. The results confirm that the stainless steel basket-bowl can be successfully drawn without wrinkles utilizing the proposed two-stage punch without a draw-bead on the blank holder. These findings contribute to the development of more efficient and reliable manufacturing processes for the stainless steel basket-bowl production.

• Animal cells and systems
• /
• 제11권2호
• /
• pp.199-204
• /
• 2007

HCN (hyperpolarization-activated cyclic nucleotide-gated) channels, whose gene family consists of four subunits (HCN1-4), mediate depolarizing cation currents and contribute to controlling neuronal excitability. In the present study, immunohistochemical and electrophysiological approaches were used to elucidate the role of HCN channels in the cerebellum. Immunohistochemical labeling for HCN1 and HCN2 channels revealed localized expression of both channels at pinceau, the specialized structure of presynaptic axon terminals of basket cells. To determine the functional role of the presynaptic HCN channels, spontaneous inhibitory postsynaptic currents (IPSCs) were recorded from Purkinje cells, the main synaptic targets of basket cells in the cerebellum. While activation of HCN channels by 8-bromo-cAMP increased amplitude of spontaneous IPSCs, blockade of the activated HCN channels by subsequent ZD7288 application reduced the amplitude of spontaneous IPSCs to the level far below the control. Our results imply that modulation of HCN1 and HCN2 channels in presynaptic terminals of basket cells regulates neurotransmitter release, thereby controlling the excitability of Purkinje cells.

• 한국컴퓨터정보학회논문지
• /
• 제12권4호
• /
• pp.179-189
• /
• 2007

고객이 제품을 구매할 때에는 항시 구매패턴이 생기기 마련인데, 이러한 구매패턴을 찾아 나가는 과정을 장바구니 분석이라 부른다. 장바구니 분석은 Microsoft Association Algorithm에서는 두 가지 단계로 구성되어 있는데, 첫 번째 단계는 빈발항목집합을 찾아내는 과정이고, 두 번째 단계는 첫 번째 단계에서 찾은 빈발항목집합을 근거로 하여 이들의 중요도를 비교하는 단순한 계산과정이다. 빈발항목집합을 찾아내는 첫 번째 단계는 장바구니 분석에 있어서 핵심부분임에도 불구하고, OLAP 큐브에 적용할 때에는 추적분석이 불가능해지거나 허구의 빈발항목집합이 생성되는 등 여러 문제가 발생하게 된다. 본 연구에서는 장바구니 분석에 있어서 추적분석을 가능하게 하고 실제의 빈발항목집합만을 생성시키는 새로운 OLAP 큐브 구조의 설계법을 제안하고 있다.